"""Tests for Matrix platform adapter (mautrix-python backend)."""
import asyncio
import json
import re
import sys
import time
import types
import pytest
from unittest.mock import MagicMock, patch, AsyncMock

from gateway.config import Platform, PlatformConfig
from gateway.platforms.base import MessageType


def _make_fake_mautrix():
    """Create a lightweight set of fake ``mautrix`` modules.

    The adapter does ``from mautrix.api import HTTPAPI``,
    ``from mautrix.client import Client``, ``from mautrix.types import ...``
    at import time and inside methods.  We provide just enough stubs for
    tests that need to mock the mautrix import chain.

    Use via ``patch.dict("sys.modules", _make_fake_mautrix())``.
    """
    # --- mautrix (root) ---
    mautrix = types.ModuleType("mautrix")

    # --- mautrix.api ---
    mautrix_api = types.ModuleType("mautrix.api")

    class HTTPAPI:
        def __init__(self, base_url="", token="", **kwargs):
            self.base_url = base_url
            self.token = token
            self.session = MagicMock()
            self.session.close = AsyncMock()

    mautrix_api.HTTPAPI = HTTPAPI
    mautrix.api = mautrix_api

    # --- mautrix.types ---
    mautrix_types = types.ModuleType("mautrix.types")

    class EventType:
        ROOM_MESSAGE = "m.room.message"
        REACTION = "m.reaction"
        ROOM_ENCRYPTED = "m.room.encrypted"
        ROOM_NAME = "m.room.name"

    class UserID(str):
        pass

    class RoomID(str):
        pass

    class EventID(str):
        pass

    class ContentURI(str):
        pass

    class SyncToken(str):
        pass

    class RoomCreatePreset:
        PRIVATE = "private_chat"
        PUBLIC = "public_chat"
        TRUSTED_PRIVATE = "trusted_private_chat"

    class PresenceState:
        ONLINE = "online"
        OFFLINE = "offline"
        UNAVAILABLE = "unavailable"

    class TrustState:
        UNVERIFIED = 0
        VERIFIED = 1

    class PaginationDirection:
        BACKWARD = "b"
        FORWARD = "f"

    mautrix_types.EventType = EventType
    mautrix_types.UserID = UserID
    mautrix_types.RoomID = RoomID
    mautrix_types.EventID = EventID
    mautrix_types.ContentURI = ContentURI
    mautrix_types.SyncToken = SyncToken
    mautrix_types.RoomCreatePreset = RoomCreatePreset
    mautrix_types.PresenceState = PresenceState
    mautrix_types.TrustState = TrustState
    mautrix_types.PaginationDirection = PaginationDirection
    mautrix.types = mautrix_types

    # --- mautrix.client ---
    mautrix_client = types.ModuleType("mautrix.client")

    class Client:
        def __init__(self, mxid=None, device_id=None, api=None,
                     state_store=None, sync_store=None, **kwargs):
            self.mxid = mxid
            self.device_id = device_id
            self.api = api
            self.state_store = state_store
            self.sync_store = sync_store
            self.crypto = None
            self._event_handlers = {}

        def add_event_handler(self, event_type, handler):
            self._event_handlers.setdefault(event_type, []).append(handler)

        def add_dispatcher(self, dispatcher_type):
            pass

    class InternalEventType:
        INVITE = "internal.invite"

    mautrix_client.Client = Client
    mautrix_client.InternalEventType = InternalEventType
    mautrix.client = mautrix_client

    # --- mautrix.client.dispatcher ---
    mautrix_client_dispatcher = types.ModuleType("mautrix.client.dispatcher")

    class MembershipEventDispatcher:
        pass

    mautrix_client_dispatcher.MembershipEventDispatcher = MembershipEventDispatcher

    # --- mautrix.client.state_store ---
    mautrix_client_state_store = types.ModuleType("mautrix.client.state_store")

    class MemoryStateStore:
        async def get_member(self, room_id, user_id):
            return None

        async def get_members(self, room_id):
            return []

        async def get_member_profiles(self, room_id):
            return {}

    class MemorySyncStore:
        pass

    mautrix_client_state_store.MemoryStateStore = MemoryStateStore
    mautrix_client_state_store.MemorySyncStore = MemorySyncStore

    # --- mautrix.crypto ---
    mautrix_crypto = types.ModuleType("mautrix.crypto")

    class OlmMachine:
        def __init__(self, client=None, crypto_store=None, state_store=None):
            self.share_keys_min_trust = None
            self.send_keys_min_trust = None

        async def load(self):
            pass

        async def share_keys(self):
            pass

        async def decrypt_megolm_event(self, event):
            return event

    mautrix_crypto.OlmMachine = OlmMachine

    # --- mautrix.crypto.store ---
    mautrix_crypto_store = types.ModuleType("mautrix.crypto.store")

    class MemoryCryptoStore:
        def __init__(self, account_id="", pickle_key=""):  # noqa: S301
            self.account_id = account_id
            self.pickle_key = pickle_key

    mautrix_crypto_store.MemoryCryptoStore = MemoryCryptoStore

    # --- mautrix.crypto.attachments ---
    mautrix_crypto_attachments = types.ModuleType("mautrix.crypto.attachments")

    def encrypt_attachment(data):
        encrypted_file = MagicMock()
        encrypted_file.serialize.return_value = {
            "key": {"k": "testkey"}, "iv": "testiv",
            "hashes": {"sha256": "testhash"}, "v": "v2",
        }
        return (b"ciphertext_" + data, encrypted_file)

    mautrix_crypto_attachments.encrypt_attachment = encrypt_attachment

    # --- mautrix.crypto.store.asyncpg ---
    mautrix_crypto_store_asyncpg = types.ModuleType("mautrix.crypto.store.asyncpg")

    class PgCryptoStore:
        upgrade_table = MagicMock()

        def __init__(self, account_id="", pickle_key="", db=None):  # noqa: S301
            self.account_id = account_id
            self.pickle_key = pickle_key
            self.db = db
            self._device_id = ""

        async def open(self):
            pass

        async def put_device_id(self, device_id):
            self._device_id = device_id

    mautrix_crypto_store_asyncpg.PgCryptoStore = PgCryptoStore

    # --- mautrix.util ---
    mautrix_util = types.ModuleType("mautrix.util")

    # --- mautrix.util.async_db ---
    mautrix_util_async_db = types.ModuleType("mautrix.util.async_db")

    class Database:
        @classmethod
        def create(cls, url, upgrade_table=None):
            db = MagicMock()
            db.start = AsyncMock()
            db.stop = AsyncMock()
            return db

    mautrix_util_async_db.Database = Database

    return {
        "mautrix": mautrix,
        "mautrix.api": mautrix_api,
        "mautrix.types": mautrix_types,
        "mautrix.client": mautrix_client,
        "mautrix.client.dispatcher": mautrix_client_dispatcher,
        "mautrix.client.state_store": mautrix_client_state_store,
        "mautrix.crypto": mautrix_crypto,
        "mautrix.crypto.attachments": mautrix_crypto_attachments,
        "mautrix.crypto.store": mautrix_crypto_store,
        "mautrix.crypto.store.asyncpg": mautrix_crypto_store_asyncpg,
        "mautrix.util": mautrix_util,
        "mautrix.util.async_db": mautrix_util_async_db,
    }


# ---------------------------------------------------------------------------
# Platform & Config
# ---------------------------------------------------------------------------

class TestMatrixConfigLoading:
    def test_apply_env_overrides_with_access_token(self, monkeypatch):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_abc123")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")

        from gateway.config import GatewayConfig, _apply_env_overrides
        config = GatewayConfig()
        _apply_env_overrides(config)

        assert Platform.MATRIX in config.platforms
        mc = config.platforms[Platform.MATRIX]
        assert mc.enabled is True
        assert mc.token == "syt_abc123"
        assert mc.extra.get("homeserver") == "https://matrix.example.org"

    def test_apply_env_overrides_with_password(self, monkeypatch):
        monkeypatch.delenv("MATRIX_ACCESS_TOKEN", raising=False)
        monkeypatch.setenv("MATRIX_PASSWORD", "secret123")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.setenv("MATRIX_USER_ID", "@bot:example.org")

        from gateway.config import GatewayConfig, _apply_env_overrides
        config = GatewayConfig()
        _apply_env_overrides(config)

        assert Platform.MATRIX in config.platforms
        mc = config.platforms[Platform.MATRIX]
        assert mc.enabled is True
        assert mc.extra.get("password") == "secret123"
        assert mc.extra.get("user_id") == "@bot:example.org"

    def test_matrix_not_loaded_without_creds(self, monkeypatch):
        monkeypatch.delenv("MATRIX_ACCESS_TOKEN", raising=False)
        monkeypatch.delenv("MATRIX_PASSWORD", raising=False)
        monkeypatch.delenv("MATRIX_HOMESERVER", raising=False)

        from gateway.config import GatewayConfig, _apply_env_overrides
        config = GatewayConfig()
        _apply_env_overrides(config)

        assert Platform.MATRIX not in config.platforms

    def test_matrix_encryption_flag(self, monkeypatch):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_abc123")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.setenv("MATRIX_ENCRYPTION", "true")

        from gateway.config import GatewayConfig, _apply_env_overrides
        config = GatewayConfig()
        _apply_env_overrides(config)

        mc = config.platforms[Platform.MATRIX]
        assert mc.extra.get("encryption") is True

    def test_matrix_encryption_default_off(self, monkeypatch):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_abc123")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.delenv("MATRIX_ENCRYPTION", raising=False)

        from gateway.config import GatewayConfig, _apply_env_overrides
        config = GatewayConfig()
        _apply_env_overrides(config)

        mc = config.platforms[Platform.MATRIX]
        assert mc.extra.get("encryption") is False

    def test_matrix_home_room(self, monkeypatch):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_abc123")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.setenv("MATRIX_HOME_ROOM", "!room123:example.org")
        monkeypatch.setenv("MATRIX_HOME_ROOM_NAME", "Bot Room")

        from gateway.config import GatewayConfig, _apply_env_overrides
        config = GatewayConfig()
        _apply_env_overrides(config)

        home = config.get_home_channel(Platform.MATRIX)
        assert home is not None
        assert home.chat_id == "!room123:example.org"
        assert home.name == "Bot Room"

    def test_matrix_user_id_stored_in_extra(self, monkeypatch):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_abc123")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.setenv("MATRIX_USER_ID", "@hermes:example.org")

        from gateway.config import GatewayConfig, _apply_env_overrides
        config = GatewayConfig()
        _apply_env_overrides(config)

        mc = config.platforms[Platform.MATRIX]
        assert mc.extra.get("user_id") == "@hermes:example.org"


# ---------------------------------------------------------------------------
# Adapter helpers
# ---------------------------------------------------------------------------

def _make_adapter():
    """Create a MatrixAdapter with mocked config."""
    from gateway.platforms.matrix import MatrixAdapter
    config = PlatformConfig(
        enabled=True,
        token="syt_test_token",
        extra={
            "homeserver": "https://matrix.example.org",
            "user_id": "@bot:example.org",
        },
    )
    adapter = MatrixAdapter(config)
    return adapter


# ---------------------------------------------------------------------------
# Typing indicator
# ---------------------------------------------------------------------------

class TestMatrixTypingIndicator:
    def setup_method(self):
        self.adapter = _make_adapter()
        self.adapter._client = MagicMock()
        self.adapter._client.set_typing = AsyncMock()

    @pytest.mark.asyncio
    async def test_stop_typing_clears_matrix_typing_state(self):
        """stop_typing() should send typing=false instead of waiting for timeout expiry."""
        from gateway.platforms.matrix import RoomID

        await self.adapter.stop_typing("!room:example.org")

        self.adapter._client.set_typing.assert_awaited_once_with(
            RoomID("!room:example.org"),
            timeout=0,
        )

    @pytest.mark.asyncio
    async def test_stop_typing_no_client_is_noop(self):
        self.adapter._client = None
        await self.adapter.stop_typing("!room:example.org")  # should not raise

    @pytest.mark.asyncio
    async def test_stop_typing_suppresses_exceptions(self):
        self.adapter._client.set_typing = AsyncMock(side_effect=Exception("network"))
        await self.adapter.stop_typing("!room:example.org")  # should not raise


# ---------------------------------------------------------------------------
# mxc:// URL conversion
# ---------------------------------------------------------------------------

class TestMatrixMxcToHttp:
    def setup_method(self):
        self.adapter = _make_adapter()

    def test_basic_mxc_conversion(self):
        """mxc://server/media_id should become an authenticated HTTP URL."""
        mxc = "mxc://matrix.org/abc123"
        result = self.adapter._mxc_to_http(mxc)
        assert result == "https://matrix.example.org/_matrix/client/v1/media/download/matrix.org/abc123"

    def test_mxc_with_different_server(self):
        """mxc:// from a different server should still use our homeserver."""
        mxc = "mxc://other.server/media456"
        result = self.adapter._mxc_to_http(mxc)
        assert result.startswith("https://matrix.example.org/")
        assert "other.server/media456" in result

    def test_non_mxc_url_passthrough(self):
        """Non-mxc URLs should be returned unchanged."""
        url = "https://example.com/image.png"
        assert self.adapter._mxc_to_http(url) == url

    def test_mxc_uses_client_v1_endpoint(self):
        """Should use /_matrix/client/v1/media/download/ not the deprecated path."""
        mxc = "mxc://example.com/test123"
        result = self.adapter._mxc_to_http(mxc)
        assert "/_matrix/client/v1/media/download/" in result
        assert "/_matrix/media/v3/download/" not in result


# ---------------------------------------------------------------------------
# DM detection
# ---------------------------------------------------------------------------

class TestMatrixDmDetection:
    def setup_method(self):
        self.adapter = _make_adapter()

    def test_room_in_m_direct_is_dm(self):
        """A room listed in m.direct should be detected as DM."""
        self.adapter._joined_rooms = {"!dm_room:ex.org", "!group_room:ex.org"}
        self.adapter._dm_rooms = {
            "!dm_room:ex.org": True,
            "!group_room:ex.org": False,
        }

        assert self.adapter._dm_rooms.get("!dm_room:ex.org") is True
        assert self.adapter._dm_rooms.get("!group_room:ex.org") is False

    def test_unknown_room_not_in_cache(self):
        """Unknown rooms should not be in the DM cache."""
        self.adapter._dm_rooms = {}
        assert self.adapter._dm_rooms.get("!unknown:ex.org") is None

    @pytest.mark.asyncio
    async def test_refresh_dm_cache_with_m_direct(self):
        """_refresh_dm_cache should populate _dm_rooms from m.direct data."""
        self.adapter._joined_rooms = {"!room_a:ex.org", "!room_b:ex.org", "!room_c:ex.org"}

        mock_client = MagicMock()
        mock_resp = MagicMock()
        mock_resp.content = {
            "@alice:ex.org": ["!room_a:ex.org"],
            "@bob:ex.org": ["!room_b:ex.org"],
        }
        mock_client.get_account_data = AsyncMock(return_value=mock_resp)
        self.adapter._client = mock_client

        await self.adapter._refresh_dm_cache()

        assert self.adapter._dm_rooms["!room_a:ex.org"] is True
        assert self.adapter._dm_rooms["!room_b:ex.org"] is True
        assert self.adapter._dm_rooms["!room_c:ex.org"] is False


# ---------------------------------------------------------------------------
# Reply fallback stripping
# ---------------------------------------------------------------------------

class TestMatrixReplyFallbackStripping:
    """Test that Matrix reply fallback lines ('> ' prefix) are stripped."""

    def setup_method(self):
        self.adapter = _make_adapter()
        self.adapter._user_id = "@bot:example.org"
        self.adapter._startup_ts = 0.0
        self.adapter._dm_rooms = {}
        self.adapter._message_handler = AsyncMock()

    def _strip_fallback(self, body: str, has_reply: bool = True) -> str:
        """Simulate the reply fallback stripping logic from _on_room_message."""
        reply_to = "some_event_id" if has_reply else None
        if reply_to and body.startswith("> "):
            lines = body.split("\n")
            stripped = []
            past_fallback = False
            for line in lines:
                if not past_fallback:
                    if line.startswith("> ") or line == ">":
                        continue
                    if line == "":
                        past_fallback = True
                        continue
                    past_fallback = True
                stripped.append(line)
            body = "\n".join(stripped) if stripped else body
        return body

    def test_simple_reply_fallback(self):
        body = "> <@alice:ex.org> Original message\n\nActual reply"
        result = self._strip_fallback(body)
        assert result == "Actual reply"

    def test_multiline_reply_fallback(self):
        body = "> <@alice:ex.org> Line 1\n> Line 2\n\nMy response"
        result = self._strip_fallback(body)
        assert result == "My response"

    def test_no_reply_fallback_preserved(self):
        body = "Just a normal message"
        result = self._strip_fallback(body, has_reply=False)
        assert result == "Just a normal message"

    def test_quote_without_reply_preserved(self):
        """'> ' lines without a reply_to context should be preserved."""
        body = "> This is a blockquote"
        result = self._strip_fallback(body, has_reply=False)
        assert result == "> This is a blockquote"

    def test_empty_fallback_separator(self):
        """The blank line between fallback and actual content should be stripped."""
        body = "> <@alice:ex.org> hi\n>\n\nResponse"
        result = self._strip_fallback(body)
        assert result == "Response"

    def test_multiline_response_after_fallback(self):
        body = "> <@alice:ex.org> Original\n\nLine 1\nLine 2\nLine 3"
        result = self._strip_fallback(body)
        assert result == "Line 1\nLine 2\nLine 3"


# ---------------------------------------------------------------------------
# Thread detection
# ---------------------------------------------------------------------------

class TestMatrixThreadDetection:
    def test_thread_id_from_m_relates_to(self):
        """m.relates_to with rel_type=m.thread should extract the event_id."""
        relates_to = {
            "rel_type": "m.thread",
            "event_id": "$thread_root_event",
            "is_falling_back": True,
            "m.in_reply_to": {"event_id": "$some_event"},
        }
        # Simulate the extraction logic from _on_room_message
        thread_id = None
        if relates_to.get("rel_type") == "m.thread":
            thread_id = relates_to.get("event_id")
        assert thread_id == "$thread_root_event"

    def test_no_thread_for_reply(self):
        """m.in_reply_to without m.thread should not set thread_id."""
        relates_to = {
            "m.in_reply_to": {"event_id": "$reply_event"},
        }
        thread_id = None
        if relates_to.get("rel_type") == "m.thread":
            thread_id = relates_to.get("event_id")
        assert thread_id is None

    def test_no_thread_for_edit(self):
        """m.replace relation should not set thread_id."""
        relates_to = {
            "rel_type": "m.replace",
            "event_id": "$edited_event",
        }
        thread_id = None
        if relates_to.get("rel_type") == "m.thread":
            thread_id = relates_to.get("event_id")
        assert thread_id is None

    def test_empty_relates_to(self):
        """Empty m.relates_to should not set thread_id."""
        relates_to = {}
        thread_id = None
        if relates_to.get("rel_type") == "m.thread":
            thread_id = relates_to.get("event_id")
        assert thread_id is None


# ---------------------------------------------------------------------------
# Format message
# ---------------------------------------------------------------------------

class TestMatrixFormatMessage:
    def setup_method(self):
        self.adapter = _make_adapter()

    def test_image_markdown_stripped(self):
        """![alt](url) should be converted to just the URL."""
        result = self.adapter.format_message("![cat](https://img.example.com/cat.png)")
        assert result == "https://img.example.com/cat.png"

    def test_regular_markdown_preserved(self):
        """Standard markdown should be preserved (Matrix supports it)."""
        content = "**bold** and *italic* and `code`"
        assert self.adapter.format_message(content) == content

    def test_plain_text_unchanged(self):
        content = "Hello, world!"
        assert self.adapter.format_message(content) == content

    def test_multiple_images_stripped(self):
        content = "![a](http://a.com/1.png) and ![b](http://b.com/2.png)"
        result = self.adapter.format_message(content)
        assert "![" not in result
        assert "http://a.com/1.png" in result
        assert "http://b.com/2.png" in result


# ---------------------------------------------------------------------------
# Markdown to HTML conversion
# ---------------------------------------------------------------------------

class TestMatrixMarkdownToHtml:
    def setup_method(self):
        self.adapter = _make_adapter()

    def test_bold_conversion(self):
        """**bold** should produce <strong> tags."""
        result = self.adapter._markdown_to_html("**bold**")
        assert "<strong>" in result or "<b>" in result
        assert "bold" in result

    def test_italic_conversion(self):
        """*italic* should produce <em> tags."""
        result = self.adapter._markdown_to_html("*italic*")
        assert "<em>" in result or "<i>" in result

    def test_inline_code(self):
        """`code` should produce <code> tags."""
        result = self.adapter._markdown_to_html("`code`")
        assert "<code>" in result

    def test_plain_text_returns_html(self):
        """Plain text should still be returned (possibly with <br> or <p>)."""
        result = self.adapter._markdown_to_html("Hello world")
        assert "Hello world" in result


# ---------------------------------------------------------------------------
# Helper: display name extraction
# ---------------------------------------------------------------------------

class TestMatrixDisplayName:
    def setup_method(self):
        self.adapter = _make_adapter()

    @pytest.mark.asyncio
    async def test_get_display_name_from_state_store(self):
        """Should get display name from state_store.get_member()."""
        mock_member = MagicMock()
        mock_member.displayname = "Alice"

        mock_state_store = MagicMock()
        mock_state_store.get_member = AsyncMock(return_value=mock_member)

        mock_client = MagicMock()
        mock_client.state_store = mock_state_store
        self.adapter._client = mock_client

        name = await self.adapter._get_display_name("!room:ex.org", "@alice:ex.org")
        assert name == "Alice"

    @pytest.mark.asyncio
    async def test_get_display_name_fallback_to_localpart(self):
        """Should extract localpart from @user:server format."""
        mock_state_store = MagicMock()
        mock_state_store.get_member = AsyncMock(return_value=None)

        mock_client = MagicMock()
        mock_client.state_store = mock_state_store
        self.adapter._client = mock_client

        name = await self.adapter._get_display_name("!room:ex.org", "@bob:example.org")
        assert name == "bob"

    @pytest.mark.asyncio
    async def test_get_display_name_no_client(self):
        """Should handle None client gracefully."""
        self.adapter._client = None
        name = await self.adapter._get_display_name("!room:ex.org", "@charlie:ex.org")
        assert name == "charlie"


# ---------------------------------------------------------------------------
# Requirements check
# ---------------------------------------------------------------------------

class TestMatrixModuleImport:
    def test_module_importable_without_mautrix(self):
        """gateway.platforms.matrix must be importable even when mautrix is
        not installed — otherwise the gateway crashes for ALL platforms.

        This test uses a subprocess to avoid polluting the current process's
        sys.modules (reimporting a module creates a second module object whose
        classes don't share globals with the original — breaking patch.object
        in subsequent tests).
        """
        import subprocess
        result = subprocess.run(
            [sys.executable, "-c", (
                "import sys\n"
                "# Block mautrix completely\n"
                "class _Blocker:\n"
                "    def find_module(self, name, path=None):\n"
                "        if name.startswith('mautrix'): return self\n"
                "    def load_module(self, name):\n"
                "        raise ImportError(f'blocked: {name}')\n"
                "sys.meta_path.insert(0, _Blocker())\n"
                "for k in list(sys.modules):\n"
                "    if k.startswith('mautrix'): del sys.modules[k]\n"
                "from gateway.platforms.matrix import check_matrix_requirements\n"
                "assert not check_matrix_requirements()\n"
                "print('OK')\n"
            )],
            capture_output=True, text=True, timeout=10,
        )
        assert result.returncode == 0, (
            f"Subprocess failed:\nstdout: {result.stdout}\nstderr: {result.stderr}"
        )


class TestMatrixRequirements:
    def test_check_requirements_with_token(self, monkeypatch):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_test")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.delenv("MATRIX_ENCRYPTION", raising=False)
        from gateway.platforms.matrix import check_matrix_requirements
        try:
            import mautrix  # noqa: F401
            assert check_matrix_requirements() is True
        except ImportError:
            assert check_matrix_requirements() is False

    def test_check_requirements_without_creds(self, monkeypatch):
        monkeypatch.delenv("MATRIX_ACCESS_TOKEN", raising=False)
        monkeypatch.delenv("MATRIX_PASSWORD", raising=False)
        monkeypatch.delenv("MATRIX_HOMESERVER", raising=False)
        from gateway.platforms.matrix import check_matrix_requirements
        assert check_matrix_requirements() is False

    def test_check_requirements_without_homeserver(self, monkeypatch):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_test")
        monkeypatch.delenv("MATRIX_HOMESERVER", raising=False)
        from gateway.platforms.matrix import check_matrix_requirements
        assert check_matrix_requirements() is False

    def test_check_requirements_encryption_true_no_e2ee_deps(self, monkeypatch):
        """MATRIX_ENCRYPTION=true should fail if python-olm is not installed."""
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_test")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.setenv("MATRIX_ENCRYPTION", "true")

        from gateway.platforms import matrix as matrix_mod
        with patch.object(matrix_mod, "_check_e2ee_deps", return_value=False):
            assert matrix_mod.check_matrix_requirements() is False

    def test_check_requirements_encryption_false_no_e2ee_deps_ok(self, monkeypatch):
        """Without encryption, missing E2EE deps should not block startup."""
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_test")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.delenv("MATRIX_ENCRYPTION", raising=False)

        from gateway.platforms import matrix as matrix_mod
        with patch.object(matrix_mod, "_check_e2ee_deps", return_value=False):
            # Still needs mautrix itself to be importable
            try:
                import mautrix  # noqa: F401
                assert matrix_mod.check_matrix_requirements() is True
            except ImportError:
                assert matrix_mod.check_matrix_requirements() is False

    def test_check_requirements_encryption_true_with_e2ee_deps(self, monkeypatch):
        """MATRIX_ENCRYPTION=true should pass if E2EE deps are available."""
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_test")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.setenv("MATRIX_ENCRYPTION", "true")

        from gateway.platforms import matrix as matrix_mod
        with patch.object(matrix_mod, "_check_e2ee_deps", return_value=True):
            try:
                import mautrix  # noqa: F401
                assert matrix_mod.check_matrix_requirements() is True
            except ImportError:
                assert matrix_mod.check_matrix_requirements() is False


# ---------------------------------------------------------------------------
# Access-token auth / E2EE bootstrap
# ---------------------------------------------------------------------------

class TestMatrixAccessTokenAuth:
    @pytest.mark.asyncio
    async def test_connect_with_access_token_and_encryption(self):
        """connect() should call whoami, set user_id/device_id, set up crypto."""
        from gateway.platforms.matrix import MatrixAdapter

        config = PlatformConfig(
            enabled=True,
            token="syt_test_access_token",
            extra={
                "homeserver": "https://matrix.example.org",
                "user_id": "@bot:example.org",
                "encryption": True,
            },
        )
        adapter = MatrixAdapter(config)

        class FakeWhoamiResponse:
            def __init__(self, user_id, device_id):
                self.user_id = user_id
                self.device_id = device_id

        fake_mautrix_mods = _make_fake_mautrix()

        # Create a mock client that returns from the mautrix.client.Client constructor
        mock_client = MagicMock()
        mock_client.mxid = "@bot:example.org"
        mock_client.device_id = None
        mock_client.state_store = MagicMock()
        mock_client.sync_store = MagicMock()
        mock_client.crypto = None
        mock_client.whoami = AsyncMock(return_value=FakeWhoamiResponse("@bot:example.org", "DEV123"))
        mock_client.sync = AsyncMock(return_value={"rooms": {"join": {"!room:server": {}}}})
        mock_client.add_event_handler = MagicMock()
        mock_client.handle_sync = MagicMock(return_value=[])
        mock_client.query_keys = AsyncMock(return_value={
            "device_keys": {"@bot:example.org": {"DEV123": {
                "keys": {"ed25519:DEV123": "fake_ed25519_key"},
            }}},
        })
        mock_client.api = MagicMock()
        mock_client.api.token = "syt_test_access_token"
        mock_client.api.session = MagicMock()
        mock_client.api.session.close = AsyncMock()

        # Mock the crypto setup
        mock_olm = MagicMock()
        mock_olm.load = AsyncMock()
        mock_olm.share_keys = AsyncMock()
        mock_olm.share_keys_min_trust = None
        mock_olm.send_keys_min_trust = None
        mock_olm.account = MagicMock()
        mock_olm.account.identity_keys = {"ed25519": "fake_ed25519_key"}

        # Patch Client constructor to return our mock
        fake_mautrix_mods["mautrix.client"].Client = MagicMock(return_value=mock_client)
        fake_mautrix_mods["mautrix.crypto"].OlmMachine = MagicMock(return_value=mock_olm)

        from gateway.platforms import matrix as matrix_mod
        with patch.object(matrix_mod, "_check_e2ee_deps", return_value=True):
            with patch.dict("sys.modules", fake_mautrix_mods):
                with patch.object(adapter, "_refresh_dm_cache", AsyncMock()):
                    with patch.object(adapter, "_sync_loop", AsyncMock(return_value=None)):
                        assert await adapter.connect() is True

        mock_client.whoami.assert_awaited_once()
        assert adapter._user_id == "@bot:example.org"

        await adapter.disconnect()


class TestDeviceKeyReVerification:
    @pytest.mark.asyncio
    async def test_verify_fails_when_server_keys_mismatch_after_upload(self):
        """share_keys() succeeds but server still has old keys -> should return False."""
        adapter = _make_adapter()

        mock_client = MagicMock()
        mock_client.mxid = "@bot:example.org"
        mock_client.device_id = "TESTDEVICE"

        # First query: keys missing -> triggers share_keys
        # Second query: keys still don't match -> should fail
        mock_keys_missing = MagicMock()
        mock_keys_missing.device_keys = {"@bot:example.org": {}}

        mock_keys_mismatch = MagicMock()
        mock_device = MagicMock()
        mock_device.keys = {"ed25519:TESTDEVICE": "server_old_key"}
        mock_keys_mismatch.device_keys = {"@bot:example.org": {"TESTDEVICE": mock_device}}

        mock_client.query_keys = AsyncMock(side_effect=[mock_keys_missing, mock_keys_mismatch])

        mock_olm = MagicMock()
        mock_olm.account = MagicMock()
        mock_olm.account.shared = False
        mock_olm.account.identity_keys = {"ed25519": "local_new_key"}
        mock_olm.share_keys = AsyncMock()

        from gateway.platforms.matrix import MatrixAdapter
        result = await adapter._verify_device_keys_on_server(mock_client, mock_olm)

        assert result is False
        mock_olm.share_keys.assert_awaited_once()


class TestMatrixE2EEHardFail:
    """connect() must refuse to start when E2EE is requested but deps are missing."""

    @pytest.mark.asyncio
    async def test_connect_fails_when_encryption_true_but_no_e2ee_deps(self):
        from gateway.platforms.matrix import MatrixAdapter, _check_e2ee_deps

        config = PlatformConfig(
            enabled=True,
            token="syt_test_access_token",
            extra={
                "homeserver": "https://matrix.example.org",
                "user_id": "@bot:example.org",
                "encryption": True,
            },
        )
        adapter = MatrixAdapter(config)

        fake_mautrix_mods = _make_fake_mautrix()

        mock_client = MagicMock()
        mock_client.whoami = AsyncMock(return_value=MagicMock(user_id="@bot:example.org", device_id="DEV123"))
        mock_client.api = MagicMock()
        mock_client.api.token = "syt_test_access_token"
        mock_client.api.session = MagicMock()
        mock_client.api.session.close = AsyncMock()
        mock_client.mxid = "@bot:example.org"
        mock_client.device_id = None
        mock_client.crypto = None

        fake_mautrix_mods["mautrix.client"].Client = MagicMock(return_value=mock_client)

        from gateway.platforms import matrix as matrix_mod
        with patch.object(matrix_mod, "_check_e2ee_deps", return_value=False):
            with patch.dict("sys.modules", fake_mautrix_mods):
                with patch.object(adapter, "_sync_loop", AsyncMock(return_value=None)):
                    result = await adapter.connect()

        assert result is False

    @pytest.mark.asyncio
    async def test_connect_fails_when_crypto_setup_raises(self):
        """Even if _check_e2ee_deps passes, if OlmMachine raises, hard-fail."""
        from gateway.platforms.matrix import MatrixAdapter

        config = PlatformConfig(
            enabled=True,
            token="syt_test_access_token",
            extra={
                "homeserver": "https://matrix.example.org",
                "user_id": "@bot:example.org",
                "encryption": True,
            },
        )
        adapter = MatrixAdapter(config)

        fake_mautrix_mods = _make_fake_mautrix()

        mock_client = MagicMock()
        mock_client.whoami = AsyncMock(return_value=MagicMock(user_id="@bot:example.org", device_id="DEV123"))
        mock_client.api = MagicMock()
        mock_client.api.token = "syt_test_access_token"
        mock_client.api.session = MagicMock()
        mock_client.api.session.close = AsyncMock()
        mock_client.mxid = "@bot:example.org"
        mock_client.device_id = None
        mock_client.crypto = None

        fake_mautrix_mods["mautrix.client"].Client = MagicMock(return_value=mock_client)
        fake_mautrix_mods["mautrix.crypto"].OlmMachine = MagicMock(side_effect=Exception("olm init failed"))

        from gateway.platforms import matrix as matrix_mod
        with patch.object(matrix_mod, "_check_e2ee_deps", return_value=True):
            with patch.dict("sys.modules", fake_mautrix_mods):
                result = await adapter.connect()

        assert result is False


class TestMatrixDeviceId:
    """MATRIX_DEVICE_ID should be used for stable device identity."""

    def test_device_id_from_config_extra(self):
        from gateway.platforms.matrix import MatrixAdapter

        config = PlatformConfig(
            enabled=True,
            token="syt_test",
            extra={
                "homeserver": "https://matrix.example.org",
                "device_id": "HERMES_BOT_STABLE",
            },
        )
        adapter = MatrixAdapter(config)
        assert adapter._device_id == "HERMES_BOT_STABLE"

    def test_device_id_from_env(self, monkeypatch):
        monkeypatch.setenv("MATRIX_DEVICE_ID", "FROM_ENV")

        from gateway.platforms.matrix import MatrixAdapter

        config = PlatformConfig(
            enabled=True,
            token="syt_test",
            extra={
                "homeserver": "https://matrix.example.org",
            },
        )
        adapter = MatrixAdapter(config)
        assert adapter._device_id == "FROM_ENV"

    def test_device_id_config_takes_precedence_over_env(self, monkeypatch):
        monkeypatch.setenv("MATRIX_DEVICE_ID", "FROM_ENV")

        from gateway.platforms.matrix import MatrixAdapter

        config = PlatformConfig(
            enabled=True,
            token="syt_test",
            extra={
                "homeserver": "https://matrix.example.org",
                "device_id": "FROM_CONFIG",
            },
        )
        adapter = MatrixAdapter(config)
        assert adapter._device_id == "FROM_CONFIG"

    @pytest.mark.asyncio
    async def test_connect_uses_configured_device_id_over_whoami(self):
        """When MATRIX_DEVICE_ID is set, it should be used instead of whoami device_id."""
        from gateway.platforms.matrix import MatrixAdapter

        config = PlatformConfig(
            enabled=True,
            token="syt_test_access_token",
            extra={
                "homeserver": "https://matrix.example.org",
                "user_id": "@bot:example.org",
                "encryption": True,
                "device_id": "MY_STABLE_DEVICE",
            },
        )
        adapter = MatrixAdapter(config)

        fake_mautrix_mods = _make_fake_mautrix()

        mock_client = MagicMock()
        mock_client.mxid = "@bot:example.org"
        mock_client.device_id = None
        mock_client.state_store = MagicMock()
        mock_client.sync_store = MagicMock()
        mock_client.crypto = None
        mock_client.whoami = AsyncMock(return_value=MagicMock(user_id="@bot:example.org", device_id="WHOAMI_DEV"))
        mock_client.sync = AsyncMock(return_value={"rooms": {"join": {"!room:server": {}}}})
        mock_client.add_event_handler = MagicMock()
        mock_client.handle_sync = MagicMock(return_value=[])
        mock_client.query_keys = AsyncMock(return_value={
            "device_keys": {"@bot:example.org": {"MY_STABLE_DEVICE": {
                "keys": {"ed25519:MY_STABLE_DEVICE": "fake_ed25519_key"},
            }}},
        })
        mock_client.api = MagicMock()
        mock_client.api.token = "syt_test_access_token"
        mock_client.api.session = MagicMock()
        mock_client.api.session.close = AsyncMock()

        mock_olm = MagicMock()
        mock_olm.load = AsyncMock()
        mock_olm.share_keys = AsyncMock()
        mock_olm.share_keys_min_trust = None
        mock_olm.send_keys_min_trust = None
        mock_olm.account = MagicMock()
        mock_olm.account.identity_keys = {"ed25519": "fake_ed25519_key"}

        fake_mautrix_mods["mautrix.client"].Client = MagicMock(return_value=mock_client)
        fake_mautrix_mods["mautrix.crypto"].OlmMachine = MagicMock(return_value=mock_olm)

        from gateway.platforms import matrix as matrix_mod
        with patch.object(matrix_mod, "_check_e2ee_deps", return_value=True):
            with patch.dict("sys.modules", fake_mautrix_mods):
                with patch.object(adapter, "_refresh_dm_cache", AsyncMock()):
                    with patch.object(adapter, "_sync_loop", AsyncMock(return_value=None)):
                        assert await adapter.connect() is True

        # The configured device_id should override the whoami device_id.
        # In mautrix, the adapter sets client.device_id directly.
        assert adapter._device_id == "MY_STABLE_DEVICE"

        await adapter.disconnect()


class TestMatrixPasswordLoginDeviceId:
    """MATRIX_DEVICE_ID should be passed to mautrix Client even with password login."""

    @pytest.mark.asyncio
    async def test_password_login_uses_device_id(self):
        from gateway.platforms.matrix import MatrixAdapter

        config = PlatformConfig(
            enabled=True,
            extra={
                "homeserver": "https://matrix.example.org",
                "user_id": "@bot:example.org",
                "password": "secret",
                "device_id": "STABLE_PW_DEVICE",
            },
        )
        adapter = MatrixAdapter(config)

        fake_mautrix_mods = _make_fake_mautrix()

        mock_client = MagicMock()
        mock_client.mxid = "@bot:example.org"
        mock_client.device_id = None
        mock_client.state_store = MagicMock()
        mock_client.sync_store = MagicMock()
        mock_client.crypto = None
        mock_client.login = AsyncMock(return_value=MagicMock(device_id="STABLE_PW_DEVICE", access_token="tok"))
        mock_client.sync = AsyncMock(return_value={"rooms": {"join": {}}})
        mock_client.add_event_handler = MagicMock()
        mock_client.api = MagicMock()
        mock_client.api.token = ""
        mock_client.api.session = MagicMock()
        mock_client.api.session.close = AsyncMock()

        fake_mautrix_mods["mautrix.client"].Client = MagicMock(return_value=mock_client)

        from gateway.platforms import matrix as matrix_mod
        with patch.dict("sys.modules", fake_mautrix_mods):
            with patch.object(adapter, "_refresh_dm_cache", AsyncMock()):
                with patch.object(adapter, "_sync_loop", AsyncMock(return_value=None)):
                    assert await adapter.connect() is True

        mock_client.login.assert_awaited_once()
        assert adapter._device_id == "STABLE_PW_DEVICE"

        await adapter.disconnect()


class TestMatrixDeviceIdConfig:
    """MATRIX_DEVICE_ID should be plumbed through gateway config."""

    def test_device_id_in_config_extra(self, monkeypatch):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_abc123")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.setenv("MATRIX_DEVICE_ID", "HERMES_BOT")

        from gateway.config import GatewayConfig, _apply_env_overrides
        config = GatewayConfig()
        _apply_env_overrides(config)

        mc = config.platforms[Platform.MATRIX]
        assert mc.extra.get("device_id") == "HERMES_BOT"

    def test_device_id_not_set_when_env_empty(self, monkeypatch):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_abc123")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        monkeypatch.delenv("MATRIX_DEVICE_ID", raising=False)

        from gateway.config import GatewayConfig, _apply_env_overrides
        config = GatewayConfig()
        _apply_env_overrides(config)

        mc = config.platforms[Platform.MATRIX]
        assert "device_id" not in mc.extra


class TestMatrixSyncLoop:
    @pytest.mark.asyncio
    async def test_sync_loop_dispatches_events_and_stores_token(self):
        """_sync_loop should call handle_sync() and persist next_batch."""
        adapter = _make_adapter()
        adapter._encryption = True
        adapter._closing = False

        call_count = 0

        async def _sync_once(**kwargs):
            nonlocal call_count
            call_count += 1
            if call_count >= 1:
                adapter._closing = True
            return {"rooms": {"join": {"!room:example.org": {}}}, "next_batch": "s1234"}

        mock_crypto = MagicMock()

        mock_sync_store = MagicMock()
        mock_sync_store.get_next_batch = AsyncMock(return_value=None)
        mock_sync_store.put_next_batch = AsyncMock()

        fake_client = MagicMock()
        fake_client.sync = AsyncMock(side_effect=_sync_once)
        fake_client.crypto = mock_crypto
        fake_client.sync_store = mock_sync_store
        fake_client.handle_sync = MagicMock(return_value=[])
        adapter._client = fake_client

        await adapter._sync_loop()

        fake_client.sync.assert_awaited_once()
        fake_client.handle_sync.assert_called_once()
        mock_sync_store.put_next_batch.assert_awaited_once_with("s1234")

    @pytest.mark.asyncio
    async def test_sync_loop_reconciles_pending_invites(self):
        """Pending rooms.invite entries should be joined if callbacks were missed."""
        adapter = _make_adapter()
        adapter._closing = False

        async def _sync_once(**kwargs):
            adapter._closing = True
            return {
                "rooms": {
                    "join": {"!joined:example.org": {}},
                    "invite": {"!invited:example.org": {}},
                },
                "next_batch": "s1234",
            }

        mock_sync_store = MagicMock()
        mock_sync_store.get_next_batch = AsyncMock(return_value=None)
        mock_sync_store.put_next_batch = AsyncMock()

        fake_client = MagicMock()
        fake_client.sync = AsyncMock(side_effect=_sync_once)
        fake_client.join_room = AsyncMock()
        fake_client.sync_store = mock_sync_store
        fake_client.handle_sync = MagicMock(return_value=[])
        adapter._client = fake_client

        with patch.object(adapter, "_refresh_dm_cache", AsyncMock()):
            await adapter._sync_loop()

        fake_client.join_room.assert_awaited_once()
        assert "!joined:example.org" in adapter._joined_rooms
        assert "!invited:example.org" in adapter._joined_rooms


class TestMatrixUploadAndSend:
    @pytest.mark.asyncio
    async def test_upload_unencrypted_room_uses_plain_url(self):
        """Unencrypted rooms should use plain 'url' key."""
        adapter = _make_adapter()
        adapter._encryption = True
        mock_client = MagicMock()
        mock_client.crypto = object()
        mock_client.state_store = MagicMock()
        mock_client.state_store.is_encrypted = AsyncMock(return_value=False)
        mock_client.upload_media = AsyncMock(return_value="mxc://example.org/plain")
        mock_client.send_message_event = AsyncMock(return_value="$event")
        adapter._client = mock_client

        result = await adapter._upload_and_send(
            "!room:example.org", b"hello", "test.txt", "text/plain", "m.file",
        )

        assert result.success is True
        sent = mock_client.send_message_event.await_args.args[2]
        assert sent["url"] == "mxc://example.org/plain"
        assert "file" not in sent

    @pytest.mark.asyncio
    async def test_upload_encrypted_room_uses_file_payload(self):
        """Encrypted rooms should use 'file' key with crypto metadata."""
        adapter = _make_adapter()
        adapter._encryption = True
        mock_client = MagicMock()
        mock_client.crypto = object()
        mock_client.state_store = MagicMock()
        mock_client.state_store.is_encrypted = AsyncMock(return_value=True)
        mock_client.upload_media = AsyncMock(return_value="mxc://example.org/enc")
        mock_client.send_message_event = AsyncMock(return_value="$event")
        adapter._client = mock_client

        result = await adapter._upload_and_send(
            "!room:example.org", b"secret", "secret.txt", "text/plain", "m.file",
        )

        assert result.success is True
        # Should have uploaded ciphertext, not plaintext
        uploaded_data = mock_client.upload_media.await_args.args[0]
        assert uploaded_data != b"secret"
        sent = mock_client.send_message_event.await_args.args[2]
        assert "url" not in sent
        assert "file" in sent
        assert sent["file"]["url"] == "mxc://example.org/enc"


class TestMatrixEncryptedSendFallback:
    @pytest.mark.asyncio
    async def test_send_retries_after_e2ee_error(self):
        """send() should retry with crypto.share_keys() on E2EE errors."""
        adapter = _make_adapter()
        adapter._encryption = True

        fake_client = MagicMock()
        fake_client.send_message_event = AsyncMock(side_effect=[
            Exception("encryption error"),
            "$event123",  # mautrix returns EventID string directly
        ])
        mock_crypto = MagicMock()
        mock_crypto.share_keys = AsyncMock()
        fake_client.crypto = mock_crypto
        adapter._client = fake_client

        result = await adapter.send("!room:example.org", "hello")

        assert result.success is True
        assert result.message_id == "$event123"
        mock_crypto.share_keys.assert_awaited_once()
        assert fake_client.send_message_event.await_count == 2


# ---------------------------------------------------------------------------
# E2EE: _joined_rooms reference preservation for CryptoStateStore
# ---------------------------------------------------------------------------

class TestJoinedRoomsReference:
    def test_joined_rooms_reference_preserved_after_reassignment(self):
        """_CryptoStateStore must see updates after initial sync populates rooms."""
        from gateway.platforms.matrix import _CryptoStateStore

        joined = set()
        store = _CryptoStateStore(MagicMock(), joined)

        # Simulate what connect() should do: mutate in place, not reassign.
        joined.clear()
        joined.update(["!room1:example.org", "!room2:example.org"])

        import asyncio
        rooms = asyncio.get_event_loop().run_until_complete(store.find_shared_rooms("@user:ex"))
        assert set(rooms) == {"!room1:example.org", "!room2:example.org"}


# ---------------------------------------------------------------------------
# E2EE: connect registers encrypted event handler
# ---------------------------------------------------------------------------

class TestMatrixEncryptedEventHandler:
    @pytest.mark.asyncio
    async def test_connect_registers_encrypted_event_handler_when_encryption_on(self):
        from gateway.platforms.matrix import MatrixAdapter

        config = PlatformConfig(
            enabled=True,
            token="syt_test_token",
            extra={
                "homeserver": "https://matrix.example.org",
                "user_id": "@bot:example.org",
                "encryption": True,
            },
        )
        adapter = MatrixAdapter(config)

        fake_mautrix_mods = _make_fake_mautrix()

        mock_client = MagicMock()
        mock_client.mxid = "@bot:example.org"
        mock_client.device_id = None
        mock_client.state_store = MagicMock()
        mock_client.sync_store = MagicMock()
        mock_client.crypto = None  # Will be set during connect
        mock_client.whoami = AsyncMock(return_value=MagicMock(user_id="@bot:example.org", device_id="DEV123"))
        mock_client.sync = AsyncMock(return_value={"rooms": {"join": {"!room:server": {}}}})
        mock_client.add_event_handler = MagicMock()
        mock_client.handle_sync = MagicMock(return_value=[])
        mock_client.query_keys = AsyncMock(return_value={
            "device_keys": {"@bot:example.org": {"DEV123": {
                "keys": {"ed25519:DEV123": "fake_ed25519_key"},
            }}},
        })
        mock_client.api = MagicMock()
        mock_client.api.token = "syt_test_token"
        mock_client.api.session = MagicMock()
        mock_client.api.session.close = AsyncMock()

        mock_olm = MagicMock()
        mock_olm.load = AsyncMock()
        mock_olm.share_keys = AsyncMock()
        mock_olm.share_keys_min_trust = None
        mock_olm.send_keys_min_trust = None
        mock_olm.account = MagicMock()
        mock_olm.account.identity_keys = {"ed25519": "fake_ed25519_key"}

        fake_mautrix_mods["mautrix.client"].Client = MagicMock(return_value=mock_client)
        fake_mautrix_mods["mautrix.crypto"].OlmMachine = MagicMock(return_value=mock_olm)

        from gateway.platforms import matrix as matrix_mod
        with patch.object(matrix_mod, "_check_e2ee_deps", return_value=True):
            with patch.dict("sys.modules", fake_mautrix_mods):
                with patch.object(adapter, "_refresh_dm_cache", AsyncMock()):
                    with patch.object(adapter, "_sync_loop", AsyncMock(return_value=None)):
                        assert await adapter.connect() is True

        # Verify event handlers were registered.
        # In mautrix the order is: add_event_handler(EventType, callback)
        handler_calls = mock_client.add_event_handler.call_args_list
        registered_types = [call.args[0] for call in handler_calls]

        # Should have registered handlers for ROOM_MESSAGE, REACTION, INVITE
        assert len(handler_calls) >= 3

        await adapter.disconnect()

    @pytest.mark.asyncio
    async def test_connect_fails_on_stale_otk_conflict(self):
        """connect() must refuse E2EE when OTK upload hits 'already exists'."""
        from gateway.platforms.matrix import MatrixAdapter

        config = PlatformConfig(
            enabled=True,
            token="syt_test_token",
            extra={
                "homeserver": "https://matrix.example.org",
                "user_id": "@bot:example.org",
                "encryption": True,
            },
        )
        adapter = MatrixAdapter(config)

        fake_mautrix_mods = _make_fake_mautrix()

        mock_client = MagicMock()
        mock_client.mxid = "@bot:example.org"
        mock_client.device_id = None
        mock_client.state_store = MagicMock()
        mock_client.sync_store = MagicMock()
        mock_client.crypto = None
        mock_client.whoami = AsyncMock(return_value=MagicMock(user_id="@bot:example.org", device_id="DEV123"))
        mock_client.add_event_handler = MagicMock()
        mock_client.add_dispatcher = MagicMock()
        mock_client.query_keys = AsyncMock(return_value={
            "device_keys": {"@bot:example.org": {"DEV123": {
                "keys": {"ed25519:DEV123": "fake_ed25519_key"},
            }}},
        })
        mock_client.api = MagicMock()
        mock_client.api.token = "syt_test_token"
        mock_client.api.session = MagicMock()
        mock_client.api.session.close = AsyncMock()

        # share_keys succeeds on first call (from _verify_device_keys_on_server),
        # then raises "already exists" on the proactive OTK flush in connect().
        mock_olm = MagicMock()
        mock_olm.load = AsyncMock()
        mock_olm.share_keys = AsyncMock(
            side_effect=[None, Exception("One time key signed_curve25519:AAAAAQ already exists")]
        )
        mock_olm.share_keys_min_trust = None
        mock_olm.send_keys_min_trust = None
        mock_olm.account = MagicMock()
        mock_olm.account.identity_keys = {"ed25519": "fake_ed25519_key"}

        fake_mautrix_mods["mautrix.client"].Client = MagicMock(return_value=mock_client)
        fake_mautrix_mods["mautrix.crypto"].OlmMachine = MagicMock(return_value=mock_olm)

        from gateway.platforms import matrix as matrix_mod
        with patch.object(matrix_mod, "_check_e2ee_deps", return_value=True):
            with patch.dict("sys.modules", fake_mautrix_mods):
                result = await adapter.connect()

        assert result is False


# ---------------------------------------------------------------------------
# Disconnect
# ---------------------------------------------------------------------------

class TestMatrixDisconnect:
    @pytest.mark.asyncio
    async def test_disconnect_closes_api_session(self):
        """disconnect() should close client.api.session."""
        adapter = _make_adapter()
        adapter._sync_task = None

        mock_session = MagicMock()
        mock_session.close = AsyncMock()

        mock_api = MagicMock()
        mock_api.session = mock_session

        fake_client = MagicMock()
        fake_client.api = mock_api
        adapter._client = fake_client

        await adapter.disconnect()

        mock_session.close.assert_awaited_once()
        assert adapter._client is None

    @pytest.mark.asyncio
    async def test_disconnect_handles_session_close_failure(self):
        """disconnect() should not raise if session close fails."""
        adapter = _make_adapter()
        adapter._sync_task = None

        mock_session = MagicMock()
        mock_session.close = AsyncMock(side_effect=Exception("close failed"))

        mock_api = MagicMock()
        mock_api.session = mock_session

        fake_client = MagicMock()
        fake_client.api = mock_api
        adapter._client = fake_client

        # Should not raise
        await adapter.disconnect()
        assert adapter._client is None

    @pytest.mark.asyncio
    async def test_disconnect_without_client(self):
        """disconnect() should handle None client gracefully."""
        adapter = _make_adapter()
        adapter._sync_task = None
        adapter._client = None

        await adapter.disconnect()
        assert adapter._client is None


# ---------------------------------------------------------------------------
# Markdown to HTML: security tests
# ---------------------------------------------------------------------------

class TestMatrixMarkdownHtmlSecurity:
    """Tests for HTML injection prevention in _markdown_to_html_fallback."""

    def setup_method(self):
        from gateway.platforms.matrix import MatrixAdapter
        self.convert = MatrixAdapter._markdown_to_html_fallback

    def test_script_injection_in_header(self):
        result = self.convert("# <script>alert(1)</script>")
        assert "<script>" not in result
        assert "&lt;script&gt;" in result

    def test_script_injection_in_plain_text(self):
        result = self.convert("Hello <script>alert(1)</script>")
        assert "<script>" not in result

    def test_img_onerror_in_blockquote(self):
        result = self.convert('> <img onerror="alert(1)">')
        assert "onerror" not in result or "&lt;img" in result

    def test_script_in_list_item(self):
        result = self.convert("- <script>alert(1)</script>")
        assert "<script>" not in result

    def test_script_in_ordered_list(self):
        result = self.convert("1. <script>alert(1)</script>")
        assert "<script>" not in result

    def test_javascript_uri_blocked(self):
        result = self.convert("[click](javascript:alert(1))")
        assert 'href="javascript:' not in result

    def test_data_uri_blocked(self):
        result = self.convert("[click](data:text/html,<script>)")
        assert 'href="data:' not in result

    def test_vbscript_uri_blocked(self):
        result = self.convert("[click](vbscript:alert(1))")
        assert 'href="vbscript:' not in result

    def test_link_text_html_injection(self):
        result = self.convert('[<img onerror="x">](http://safe.com)')
        assert "<img" not in result or "&lt;img" in result

    def test_link_href_attribute_breakout(self):
        result = self.convert('[link](http://x" onclick="alert(1))')
        assert "onclick" not in result or "&quot;" in result

    def test_html_injection_in_bold(self):
        result = self.convert("**<img onerror=alert(1)>**")
        assert "<img" not in result or "&lt;img" in result

    def test_html_injection_in_italic(self):
        result = self.convert("*<script>alert(1)</script>*")
        assert "<script>" not in result


# ---------------------------------------------------------------------------
# Markdown to HTML: extended formatting tests
# ---------------------------------------------------------------------------

class TestMatrixMarkdownHtmlFormatting:
    """Tests for new formatting capabilities in _markdown_to_html_fallback."""

    def setup_method(self):
        from gateway.platforms.matrix import MatrixAdapter
        self.convert = MatrixAdapter._markdown_to_html_fallback

    def test_fenced_code_block(self):
        result = self.convert('```python\ndef hello():\n    pass\n```')
        assert "<pre><code" in result
        assert "language-python" in result

    def test_fenced_code_block_no_lang(self):
        result = self.convert('```\nsome code\n```')
        assert "<pre><code>" in result

    def test_code_block_html_escaped(self):
        result = self.convert('```\n<script>alert(1)</script>\n```')
        assert "&lt;script&gt;" in result
        assert "<script>" not in result

    def test_headers(self):
        assert "<h1>" in self.convert("# H1")
        assert "<h2>" in self.convert("## H2")
        assert "<h3>" in self.convert("### H3")

    def test_unordered_list(self):
        result = self.convert("- One\n- Two\n- Three")
        assert "<ul>" in result
        assert result.count("<li>") == 3

    def test_ordered_list(self):
        result = self.convert("1. First\n2. Second")
        assert "<ol>" in result
        assert result.count("<li>") == 2

    def test_blockquote(self):
        result = self.convert("> A quote\n> continued")
        assert "<blockquote>" in result
        assert "A quote" in result

    def test_horizontal_rule(self):
        assert "<hr>" in self.convert("---")
        assert "<hr>" in self.convert("***")

    def test_strikethrough(self):
        result = self.convert("~~deleted~~")
        assert "<del>deleted</del>" in result

    def test_links_preserved(self):
        result = self.convert("[text](https://example.com)")
        assert '<a href="https://example.com">text</a>' in result

    def test_complex_mixed_document(self):
        """A realistic agent response with multiple formatting types."""
        text = "## Summary\n\nHere's what I found:\n\n- **Bold item**\n- `code` item\n\n```bash\necho hello\n```\n\n1. Step one\n2. Step two"
        result = self.convert(text)
        assert "<h2>" in result
        assert "<strong>" in result
        assert "<code>" in result
        assert "<ul>" in result
        assert "<ol>" in result
        assert "<pre><code" in result


# ---------------------------------------------------------------------------
# Link URL sanitization
# ---------------------------------------------------------------------------

class TestMatrixLinkSanitization:
    def test_safe_https_url(self):
        from gateway.platforms.matrix import MatrixAdapter
        assert MatrixAdapter._sanitize_link_url("https://example.com") == "https://example.com"

    def test_javascript_blocked(self):
        from gateway.platforms.matrix import MatrixAdapter
        assert MatrixAdapter._sanitize_link_url("javascript:alert(1)") == ""

    def test_data_blocked(self):
        from gateway.platforms.matrix import MatrixAdapter
        assert MatrixAdapter._sanitize_link_url("data:text/html,bad") == ""

    def test_vbscript_blocked(self):
        from gateway.platforms.matrix import MatrixAdapter
        assert MatrixAdapter._sanitize_link_url("vbscript:bad") == ""

    def test_quotes_escaped(self):
        from gateway.platforms.matrix import MatrixAdapter
        result = MatrixAdapter._sanitize_link_url('http://x"y')
        assert '"' not in result
        assert "&quot;" in result


# ---------------------------------------------------------------------------
# Reactions
# ---------------------------------------------------------------------------

class TestMatrixReactions:
    def setup_method(self):
        self.adapter = _make_adapter()

    @pytest.mark.asyncio
    async def test_send_reaction(self):
        """_send_reaction should call send_message_event with m.reaction."""
        mock_client = MagicMock()
        # mautrix send_message_event returns EventID string directly
        mock_client.send_message_event = AsyncMock(return_value="$reaction1")
        self.adapter._client = mock_client

        result = await self.adapter._send_reaction("!room:ex", "$event1", "\U0001f44d")
        assert result == "$reaction1"
        mock_client.send_message_event.assert_called_once()
        call_args = mock_client.send_message_event.call_args
        content = call_args.args[2] if len(call_args.args) > 2 else call_args.kwargs.get("content")
        assert content["m.relates_to"]["rel_type"] == "m.annotation"
        assert content["m.relates_to"]["key"] == "\U0001f44d"

    @pytest.mark.asyncio
    async def test_send_reaction_no_client(self):
        self.adapter._client = None
        result = await self.adapter._send_reaction("!room:ex", "$ev", "\U0001f44d")
        assert result is None

    @pytest.mark.asyncio
    async def test_on_processing_start_sends_eyes(self):
        """on_processing_start should send eyes reaction."""
        from gateway.platforms.base import MessageEvent, MessageType

        self.adapter._reactions_enabled = True
        self.adapter._send_reaction = AsyncMock(return_value="$reaction_event_123")

        source = MagicMock()
        source.chat_id = "!room:ex"
        event = MessageEvent(
            text="hello",
            message_type=MessageType.TEXT,
            source=source,
            raw_message={},
            message_id="$msg1",
        )
        await self.adapter.on_processing_start(event)
        self.adapter._send_reaction.assert_called_once_with("!room:ex", "$msg1", "\U0001f440")
        assert self.adapter._pending_reactions == {("!room:ex", "$msg1"): "$reaction_event_123"}

    @pytest.mark.asyncio
    async def test_on_processing_complete_sends_check(self):
        from gateway.platforms.base import MessageEvent, MessageType, ProcessingOutcome

        self.adapter._reactions_enabled = True
        self.adapter._pending_reactions = {("!room:ex", "$msg1"): "$eyes_reaction_123"}
        self.adapter._redact_reaction = AsyncMock(return_value=True)
        self.adapter._send_reaction = AsyncMock(return_value="$check_reaction_456")

        source = MagicMock()
        source.chat_id = "!room:ex"
        event = MessageEvent(
            text="hello",
            message_type=MessageType.TEXT,
            source=source,
            raw_message={},
            message_id="$msg1",
        )
        await self.adapter.on_processing_complete(event, ProcessingOutcome.SUCCESS)
        self.adapter._redact_reaction.assert_called_once_with("!room:ex", "$eyes_reaction_123")
        self.adapter._send_reaction.assert_called_once_with("!room:ex", "$msg1", "\u2705")

    @pytest.mark.asyncio
    async def test_on_processing_complete_sends_cross_on_failure(self):
        from gateway.platforms.base import MessageEvent, MessageType, ProcessingOutcome

        self.adapter._reactions_enabled = True
        self.adapter._pending_reactions = {("!room:ex", "$msg1"): "$eyes_reaction_123"}
        self.adapter._redact_reaction = AsyncMock(return_value=True)
        self.adapter._send_reaction = AsyncMock(return_value="$cross_reaction_456")

        source = MagicMock()
        source.chat_id = "!room:ex"
        event = MessageEvent(
            text="hello",
            message_type=MessageType.TEXT,
            source=source,
            raw_message={},
            message_id="$msg1",
        )
        await self.adapter.on_processing_complete(event, ProcessingOutcome.FAILURE)
        self.adapter._redact_reaction.assert_called_once_with("!room:ex", "$eyes_reaction_123")
        self.adapter._send_reaction.assert_called_once_with("!room:ex", "$msg1", "\u274c")

    @pytest.mark.asyncio
    async def test_on_processing_complete_cancelled_sends_no_terminal_reaction(self):
        from gateway.platforms.base import MessageEvent, MessageType, ProcessingOutcome

        self.adapter._reactions_enabled = True
        self.adapter._send_reaction = AsyncMock(return_value=True)

        source = MagicMock()
        source.chat_id = "!room:ex"
        event = MessageEvent(
            text="hello",
            message_type=MessageType.TEXT,
            source=source,
            raw_message={},
            message_id="$msg1",
        )
        await self.adapter.on_processing_complete(event, ProcessingOutcome.CANCELLED)
        self.adapter._send_reaction.assert_not_called()

    @pytest.mark.asyncio
    async def test_on_processing_complete_no_pending_reaction(self):
        """on_processing_complete should skip redaction if no eyes reaction was tracked."""
        from gateway.platforms.base import MessageEvent, MessageType, ProcessingOutcome

        self.adapter._reactions_enabled = True
        self.adapter._pending_reactions = {}
        self.adapter._redact_reaction = AsyncMock()
        self.adapter._send_reaction = AsyncMock(return_value="$check_reaction_789")

        source = MagicMock()
        source.chat_id = "!room:ex"
        event = MessageEvent(
            text="hello",
            message_type=MessageType.TEXT,
            source=source,
            raw_message={},
            message_id="$msg1",
        )
        await self.adapter.on_processing_complete(event, ProcessingOutcome.SUCCESS)
        self.adapter._redact_reaction.assert_not_called()
        self.adapter._send_reaction.assert_called_once_with("!room:ex", "$msg1", "\u2705")

    @pytest.mark.asyncio
    async def test_reactions_disabled(self):
        from gateway.platforms.base import MessageEvent, MessageType

        self.adapter._reactions_enabled = False
        self.adapter._send_reaction = AsyncMock()

        source = MagicMock()
        source.chat_id = "!room:ex"
        event = MessageEvent(
            text="hello",
            message_type=MessageType.TEXT,
            source=source,
            raw_message={},
            message_id="$msg1",
        )
        await self.adapter.on_processing_start(event)
        self.adapter._send_reaction.assert_not_called()


# ---------------------------------------------------------------------------
# Read receipts
# ---------------------------------------------------------------------------

class TestMatrixReadReceipts:
    def setup_method(self):
        self.adapter = _make_adapter()

    @pytest.mark.asyncio
    async def test_accepted_message_schedules_read_receipt(self):
        self.adapter._is_dm_room = AsyncMock(return_value=True)
        self.adapter._get_display_name = AsyncMock(return_value="Alice")
        self.adapter._background_read_receipt = MagicMock()

        ctx = await self.adapter._resolve_message_context(
            room_id="!room:ex",
            sender="@alice:ex",
            event_id="$event1",
            body="hello",
            source_content={"body": "hello"},
            relates_to={},
        )

        assert ctx is not None
        self.adapter._background_read_receipt.assert_called_once_with(
            "!room:ex", "$event1"
        )

    @pytest.mark.asyncio
    async def test_send_read_receipt(self):
        """send_read_receipt should call mautrix's real read-marker API."""
        mock_client = MagicMock()
        mock_client.set_fully_read_marker = AsyncMock(return_value=None)
        self.adapter._client = mock_client

        result = await self.adapter.send_read_receipt("!room:ex", "$event1")
        assert result is True
        mock_client.set_fully_read_marker.assert_awaited_once_with(
            "!room:ex", "$event1", "$event1"
        )

    @pytest.mark.asyncio
    async def test_send_read_receipt_falls_back_to_receipt_only(self):
        """send_read_receipt should still work with clients lacking read markers."""
        mock_client = MagicMock(spec=["send_receipt"])
        mock_client.send_receipt = AsyncMock(return_value=None)
        self.adapter._client = mock_client

        result = await self.adapter.send_read_receipt("!room:ex", "$event1")
        assert result is True
        mock_client.send_receipt.assert_awaited_once_with("!room:ex", "$event1")

    @pytest.mark.asyncio
    async def test_read_receipt_no_client(self):
        self.adapter._client = None
        result = await self.adapter.send_read_receipt("!room:ex", "$event1")
        assert result is False


# ---------------------------------------------------------------------------
# Media normalization
# ---------------------------------------------------------------------------

class TestMatrixImageOnlyMediaNormalization:
    def setup_method(self):
        self.adapter = _make_adapter()
        self.adapter._client = MagicMock()
        self.adapter._client.download_media = AsyncMock(return_value=None)
        self.adapter._is_dm_room = AsyncMock(return_value=True)
        self.adapter._get_display_name = AsyncMock(return_value="Alice")
        self.adapter._background_read_receipt = MagicMock()
        self.adapter._mxc_to_http = (
            lambda url: "https://matrix.example.org/_matrix/media/v3/download/example/30.png"
        )

    @pytest.mark.asyncio
    async def test_image_only_filename_body_is_not_forwarded_as_text(self):
        captured_event = None

        async def capture(msg_event):
            nonlocal captured_event
            captured_event = msg_event

        self.adapter.handle_message = capture

        await self.adapter._handle_media_message(
            room_id="!room:example.org",
            sender="@alice:example.org",
            event_id="$image1",
            event_ts=0.0,
            source_content={
                "msgtype": "m.image",
                "body": "30.png",
                "url": "mxc://example/30.png",
                "info": {"mimetype": "image/png"},
            },
            relates_to={},
            msgtype="m.image",
        )

        assert captured_event is not None
        assert captured_event.text == ""
        assert captured_event.media_urls == [
            "https://matrix.example.org/_matrix/media/v3/download/example/30.png"
        ]
        assert captured_event.message_type == MessageType.PHOTO

    @pytest.mark.asyncio
    async def test_image_caption_text_is_preserved(self):
        captured_event = None

        async def capture(msg_event):
            nonlocal captured_event
            captured_event = msg_event

        self.adapter.handle_message = capture

        await self.adapter._handle_media_message(
            room_id="!room:example.org",
            sender="@alice:example.org",
            event_id="$image2",
            event_ts=0.0,
            source_content={
                "msgtype": "m.image",
                "body": "Please describe this chart",
                "url": "mxc://example/30.png",
                "info": {"mimetype": "image/png"},
            },
            relates_to={},
            msgtype="m.image",
        )

        assert captured_event is not None
        assert captured_event.text == "Please describe this chart"
# ---------------------------------------------------------------------------
# Message redaction
# ---------------------------------------------------------------------------

class TestMatrixRedaction:
    def setup_method(self):
        self.adapter = _make_adapter()

    @pytest.mark.asyncio
    async def test_redact_message(self):
        """redact_message should call client.redact()."""
        mock_client = MagicMock()
        # mautrix redact() returns EventID string
        mock_client.redact = AsyncMock(return_value="$redact_event")
        self.adapter._client = mock_client

        result = await self.adapter.redact_message("!room:ex", "$ev1", "oops")
        assert result is True
        mock_client.redact.assert_called_once()

    @pytest.mark.asyncio
    async def test_redact_no_client(self):
        self.adapter._client = None
        result = await self.adapter.redact_message("!room:ex", "$ev1")
        assert result is False


# ---------------------------------------------------------------------------
# Room creation & invite
# ---------------------------------------------------------------------------

class TestMatrixRoomManagement:
    def setup_method(self):
        self.adapter = _make_adapter()

    @pytest.mark.asyncio
    async def test_create_room(self):
        """create_room should call client.create_room() returning RoomID string."""
        mock_client = MagicMock()
        # mautrix create_room returns RoomID string directly
        mock_client.create_room = AsyncMock(return_value="!new:example.org")
        self.adapter._client = mock_client

        room_id = await self.adapter.create_room(name="Test Room", topic="A test")
        assert room_id == "!new:example.org"
        assert "!new:example.org" in self.adapter._joined_rooms

    @pytest.mark.asyncio
    async def test_invite_user(self):
        """invite_user should call client.invite_user()."""
        mock_client = MagicMock()
        mock_client.invite_user = AsyncMock(return_value=None)
        self.adapter._client = mock_client

        result = await self.adapter.invite_user("!room:ex", "@user:ex")
        assert result is True

    @pytest.mark.asyncio
    async def test_create_room_no_client(self):
        self.adapter._client = None
        result = await self.adapter.create_room()
        assert result is None


# ---------------------------------------------------------------------------
# Presence
# ---------------------------------------------------------------------------

class TestMatrixPresence:
    def setup_method(self):
        self.adapter = _make_adapter()

    @pytest.mark.asyncio
    async def test_set_presence_valid(self):
        mock_client = MagicMock()
        mock_client.set_presence = AsyncMock()
        self.adapter._client = mock_client

        result = await self.adapter.set_presence("online")
        assert result is True

    @pytest.mark.asyncio
    async def test_set_presence_invalid_state(self):
        mock_client = MagicMock()
        self.adapter._client = mock_client

        result = await self.adapter.set_presence("busy")
        assert result is False

    @pytest.mark.asyncio
    async def test_set_presence_no_client(self):
        self.adapter._client = None
        result = await self.adapter.set_presence("online")
        assert result is False


# ---------------------------------------------------------------------------
# Self / bridge / system sender filtering — regression coverage for #15763
# ("Hall of Mirrors": recursive pairing / echo loops triggered by bridge
# or bot-self senders bypassing the early-drop guard in _on_room_message).
# ---------------------------------------------------------------------------

class TestMatrixSelfSenderFilter:
    def setup_method(self):
        self.adapter = _make_adapter()

    def test_exact_match_is_self(self):
        self.adapter._user_id = "@bot:example.org"
        assert self.adapter._is_self_sender("@bot:example.org") is True

    def test_case_insensitive_match_is_self(self):
        # Some homeservers canonicalize the localpart differently at
        # different API surfaces — a case-sensitive equality check lets
        # the bot's own sender through and triggers the pairing / echo
        # loop in #15763.
        self.adapter._user_id = "@Bot:Example.ORG"
        assert self.adapter._is_self_sender("@bot:example.org") is True
        assert self.adapter._is_self_sender("@BOT:EXAMPLE.ORG") is True

    def test_whitespace_trimmed(self):
        self.adapter._user_id = "@bot:example.org"
        assert self.adapter._is_self_sender("  @bot:example.org  ") is True

    def test_different_user_is_not_self(self):
        self.adapter._user_id = "@bot:example.org"
        assert self.adapter._is_self_sender("@alice:example.org") is False

    def test_empty_user_id_is_treated_as_self(self):
        # If whoami hasn't resolved yet (or login failed), we cannot
        # prove a sender is NOT us.  Defensively drop rather than leak
        # our own outbound traffic into the agent loop.
        self.adapter._user_id = ""
        assert self.adapter._is_self_sender("@alice:example.org") is True
        assert self.adapter._is_self_sender("") is True


class TestMatrixSystemBridgeFilter:
    def setup_method(self):
        self.adapter = _make_adapter()

    def test_appservice_underscore_prefix_is_bridge(self):
        # Conventional appservice namespace puppets
        assert self.adapter._is_system_or_bridge_sender(
            "@_telegram_12345:bridge.example.org"
        ) is True
        assert self.adapter._is_system_or_bridge_sender(
            "@_discord_999:example.org"
        ) is True
        assert self.adapter._is_system_or_bridge_sender(
            "@_slackbridge_puppet:example.org"
        ) is True

    def test_empty_localpart_is_system(self):
        assert self.adapter._is_system_or_bridge_sender("@:server.example") is True

    def test_empty_sender_is_system(self):
        assert self.adapter._is_system_or_bridge_sender("") is True
        assert self.adapter._is_system_or_bridge_sender("   ") is True

    def test_regular_user_is_not_bridge(self):
        assert self.adapter._is_system_or_bridge_sender(
            "@alice:example.org"
        ) is False
        # A user whose localpart merely CONTAINS an underscore is not a
        # bridge — the convention is a LEADING underscore.
        assert self.adapter._is_system_or_bridge_sender(
            "@alice_smith:example.org"
        ) is False

    def test_bot_account_is_not_bridge(self):
        # The Hermes bot itself (no leading underscore) must not be
        # classified as a bridge — that filter is a pairing guard, not
        # a self-filter.
        assert self.adapter._is_system_or_bridge_sender(
            "@daemon:nerdworks.casa"
        ) is False


class TestMatrixOnRoomMessageFilter:
    """End-to-end coverage of _on_room_message drop conditions."""

    def setup_method(self):
        self.adapter = _make_adapter()
        self.adapter._user_id = "@bot:example.org"
        self.adapter._startup_ts = 0.0  # accept any event_ts
        self.adapter._handle_text_message = AsyncMock()
        self.adapter._handle_media_message = AsyncMock()

    @staticmethod
    def _mk_event(sender, body="hi", msgtype="m.text", event_id=None, ts=None):
        import time as _t

        ev = MagicMock()
        ev.room_id = "!room:example.org"
        ev.sender = sender
        ev.event_id = event_id or f"$evt-{sender}-{body}"
        ev.timestamp = int((ts or _t.time()) * 1000)
        ev.server_timestamp = ev.timestamp
        ev.content = {"msgtype": msgtype, "body": body}
        return ev

    @pytest.mark.asyncio
    async def test_own_sender_case_insensitive_dropped(self):
        # Simulate whoami returning a differently-cased copy of our MXID.
        self.adapter._user_id = "@Bot:Example.ORG"
        ev = self._mk_event(sender="@bot:example.org")
        await self.adapter._on_room_message(ev)
        self.adapter._handle_text_message.assert_not_called()

    @pytest.mark.asyncio
    async def test_bridge_sender_dropped_before_pairing(self):
        ev = self._mk_event(sender="@_telegram_12345:bridge.example.org")
        await self.adapter._on_room_message(ev)
        # Bridge / appservice identities must never flow through to the
        # gateway — otherwise they trigger pairing (#15763).
        self.adapter._handle_text_message.assert_not_called()

    @pytest.mark.asyncio
    async def test_empty_sender_dropped(self):
        ev = self._mk_event(sender="")
        await self.adapter._on_room_message(ev)
        self.adapter._handle_text_message.assert_not_called()

    @pytest.mark.asyncio
    async def test_self_with_unresolved_user_id_dropped(self):
        # whoami has not resolved yet → user_id empty → drop ALL traffic
        # defensively rather than risk echoing our own outbound messages.
        self.adapter._user_id = ""
        ev = self._mk_event(sender="@alice:example.org")
        await self.adapter._on_room_message(ev)
        self.adapter._handle_text_message.assert_not_called()

    @pytest.mark.asyncio
    async def test_regular_user_reaches_text_handler(self):
        ev = self._mk_event(sender="@alice:example.org", body="hello bot")
        await self.adapter._on_room_message(ev)
        self.adapter._handle_text_message.assert_awaited_once()
# ---------------------------------------------------------------------------
# DM auto-thread
# ---------------------------------------------------------------------------

class TestMatrixDmAutoThread:
    def setup_method(self):
        self.adapter = _make_adapter()
        self.adapter._is_dm_room = AsyncMock(return_value=True)
        self.adapter._get_display_name = AsyncMock(return_value="Alice")
        self.adapter._background_read_receipt = MagicMock()
        # Disable require_mention so DMs pass gating
        self.adapter._require_mention = False

    @pytest.mark.asyncio
    async def test_dm_auto_thread_enabled_creates_thread(self):
        """When dm_auto_thread is True, DM messages get auto-threaded."""
        self.adapter._dm_auto_thread = True

        ctx = await self.adapter._resolve_message_context(
            room_id="!dm:ex",
            sender="@alice:ex",
            event_id="$ev1",
            body="hello",
            source_content={"body": "hello"},
            relates_to={},
        )

        assert ctx is not None
        _body, _is_dm, _chat_type, thread_id, _display, _source = ctx
        assert thread_id == "$ev1"

    @pytest.mark.asyncio
    async def test_dm_auto_thread_disabled_no_thread(self):
        """When dm_auto_thread is False (default), DMs have no auto-thread."""
        self.adapter._dm_auto_thread = False

        ctx = await self.adapter._resolve_message_context(
            room_id="!dm:ex",
            sender="@alice:ex",
            event_id="$ev2",
            body="hello",
            source_content={"body": "hello"},
            relates_to={},
        )

        assert ctx is not None
        _body, _is_dm, _chat_type, thread_id, _display, _source = ctx
        assert thread_id is None



# ---------------------------------------------------------------------------
# Proxy configuration
# ---------------------------------------------------------------------------

class TestMatrixProxyConfig:
    """Verify that MatrixAdapter resolves and propagates proxy settings."""

    def _make_adapter(self, monkeypatch, proxy_env=None):
        monkeypatch.setenv("MATRIX_ACCESS_TOKEN", "syt_test")
        monkeypatch.setenv("MATRIX_HOMESERVER", "https://matrix.example.org")
        # Clear generic proxy vars so they don't leak from the host
        for key in ("HTTPS_PROXY", "HTTP_PROXY", "ALL_PROXY",
                    "https_proxy", "http_proxy", "all_proxy", "MATRIX_PROXY"):
            monkeypatch.delenv(key, raising=False)
        if proxy_env:
            for k, v in proxy_env.items():
                monkeypatch.setenv(k, v)
        with patch.dict("sys.modules", _make_fake_mautrix()):
            from gateway.platforms.matrix import MatrixAdapter
            cfg = PlatformConfig(enabled=True, token="syt_test",
                                 extra={"homeserver": "https://matrix.example.org",
                                        "user_id": "@bot:example.org"})
            return MatrixAdapter(cfg)

    def test_no_proxy_by_default(self, monkeypatch):
        adapter = self._make_adapter(monkeypatch)
        assert adapter._proxy_url is None

    def test_matrix_proxy_env_var(self, monkeypatch):
        adapter = self._make_adapter(monkeypatch,
                                     proxy_env={"MATRIX_PROXY": "socks5://proxy:1080"})
        assert adapter._proxy_url == "socks5://proxy:1080"

    def test_generic_proxy_fallback(self, monkeypatch):
        adapter = self._make_adapter(monkeypatch,
                                     proxy_env={"HTTPS_PROXY": "http://corp:8080"})
        assert adapter._proxy_url == "http://corp:8080"

    def test_matrix_proxy_takes_priority(self, monkeypatch):
        adapter = self._make_adapter(monkeypatch,
                                     proxy_env={"MATRIX_PROXY": "socks5://special:1080",
                                                "HTTPS_PROXY": "http://generic:8080"})
        assert adapter._proxy_url == "socks5://special:1080"


class TestCreateMatrixSession:
    """Verify _create_matrix_session applies proxy at the session level."""

    @pytest.mark.asyncio
    async def test_no_proxy_returns_trust_env_session(self):
        with patch.dict("sys.modules", _make_fake_mautrix()):
            from gateway.platforms.matrix import _create_matrix_session
            session = _create_matrix_session(None)
            try:
                assert session.trust_env is True
            finally:
                await session.close()

    @pytest.mark.asyncio
    async def test_http_proxy_sets_default_proxy(self):
        with patch.dict("sys.modules", _make_fake_mautrix()):
            from gateway.platforms.matrix import _create_matrix_session
            session = _create_matrix_session("http://proxy:8080")
            try:
                assert str(session._default_proxy) == "http://proxy:8080"
            finally:
                await session.close()

    @pytest.mark.asyncio
    async def test_socks_proxy_uses_connector(self):
        fake_connector = MagicMock()
        with patch.dict("sys.modules", _make_fake_mautrix()):
            with patch.dict("sys.modules", {
                "aiohttp_socks": MagicMock(
                    ProxyConnector=MagicMock(
                        from_url=MagicMock(return_value=fake_connector)
                    )
                ),
            }):
                from gateway.platforms.matrix import _create_matrix_session
                session = _create_matrix_session("socks5://proxy:1080")
                try:
                    assert session.connector is fake_connector
                finally:
                    await session.close()