"""Tests for the WeCom platform adapter."""

import base64
import os
from pathlib import Path
from types import SimpleNamespace
from unittest.mock import AsyncMock, patch

import pytest

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


class TestWeComRequirements:
    def test_returns_false_without_aiohttp(self, monkeypatch):
        monkeypatch.setattr("gateway.platforms.wecom.AIOHTTP_AVAILABLE", False)
        monkeypatch.setattr("gateway.platforms.wecom.HTTPX_AVAILABLE", True)
        from gateway.platforms.wecom import check_wecom_requirements

        assert check_wecom_requirements() is False

    def test_returns_false_without_httpx(self, monkeypatch):
        monkeypatch.setattr("gateway.platforms.wecom.AIOHTTP_AVAILABLE", True)
        monkeypatch.setattr("gateway.platforms.wecom.HTTPX_AVAILABLE", False)
        from gateway.platforms.wecom import check_wecom_requirements

        assert check_wecom_requirements() is False

    def test_returns_true_when_available(self, monkeypatch):
        monkeypatch.setattr("gateway.platforms.wecom.AIOHTTP_AVAILABLE", True)
        monkeypatch.setattr("gateway.platforms.wecom.HTTPX_AVAILABLE", True)
        from gateway.platforms.wecom import check_wecom_requirements

        assert check_wecom_requirements() is True


class TestWeComAdapterInit:
    def test_reads_config_from_extra(self):
        from gateway.platforms.wecom import WeComAdapter

        config = PlatformConfig(
            enabled=True,
            extra={
                "bot_id": "cfg-bot",
                "secret": "cfg-secret",
                "websocket_url": "wss://custom.wecom.example/ws",
                "group_policy": "allowlist",
                "group_allow_from": ["group-1"],
            },
        )
        adapter = WeComAdapter(config)

        assert adapter._bot_id == "cfg-bot"
        assert adapter._secret == "cfg-secret"
        assert adapter._ws_url == "wss://custom.wecom.example/ws"
        assert adapter._group_policy == "allowlist"
        assert adapter._group_allow_from == ["group-1"]

    def test_falls_back_to_env_vars(self, monkeypatch):
        monkeypatch.setenv("WECOM_BOT_ID", "env-bot")
        monkeypatch.setenv("WECOM_SECRET", "env-secret")
        monkeypatch.setenv("WECOM_WEBSOCKET_URL", "wss://env.example/ws")
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        assert adapter._bot_id == "env-bot"
        assert adapter._secret == "env-secret"
        assert adapter._ws_url == "wss://env.example/ws"


class TestWeComConnect:
    @pytest.mark.asyncio
    async def test_connect_records_missing_credentials(self, monkeypatch):
        import gateway.platforms.wecom as wecom_module
        from gateway.platforms.wecom import WeComAdapter

        monkeypatch.setattr(wecom_module, "AIOHTTP_AVAILABLE", True)
        monkeypatch.setattr(wecom_module, "HTTPX_AVAILABLE", True)

        adapter = WeComAdapter(PlatformConfig(enabled=True))

        success = await adapter.connect()

        assert success is False
        assert adapter.has_fatal_error is True
        assert adapter.fatal_error_code == "wecom_missing_credentials"
        assert "WECOM_BOT_ID" in (adapter.fatal_error_message or "")

    @pytest.mark.asyncio
    async def test_connect_records_handshake_failure_details(self, monkeypatch):
        import gateway.platforms.wecom as wecom_module
        from gateway.platforms.wecom import WeComAdapter

        class DummyClient:
            async def aclose(self):
                return None

        monkeypatch.setattr(wecom_module, "AIOHTTP_AVAILABLE", True)
        monkeypatch.setattr(wecom_module, "HTTPX_AVAILABLE", True)
        monkeypatch.setattr(
            wecom_module,
            "httpx",
            SimpleNamespace(AsyncClient=lambda **kwargs: DummyClient()),
        )

        adapter = WeComAdapter(
            PlatformConfig(enabled=True, extra={"bot_id": "bot-1", "secret": "secret-1"})
        )
        adapter._open_connection = AsyncMock(side_effect=RuntimeError("invalid secret (errcode=40013)"))

        success = await adapter.connect()

        assert success is False
        assert adapter.has_fatal_error is True
        assert adapter.fatal_error_code == "wecom_connect_error"
        assert "invalid secret" in (adapter.fatal_error_message or "")


class TestWeComReplyMode:
    @pytest.mark.asyncio
    async def test_send_uses_passive_reply_markdown_when_reply_context_exists(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._reply_req_ids["msg-1"] = "req-1"
        adapter._send_reply_request = AsyncMock(
            return_value={"headers": {"req_id": "req-1"}, "errcode": 0}
        )

        result = await adapter.send("chat-123", "hello from reply", reply_to="msg-1")

        assert result.success is True
        adapter._send_reply_request.assert_awaited_once()
        args = adapter._send_reply_request.await_args.args
        assert args[0] == "req-1"
        # msgtype: stream triggers WeCom errcode 600039 on many mobile clients
        # (unsupported type). Markdown renders everywhere.
        assert args[1]["msgtype"] == "markdown"
        assert args[1]["markdown"]["content"] == "hello from reply"

    @pytest.mark.asyncio
    async def test_send_image_file_uses_passive_reply_media_when_reply_context_exists(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._reply_req_ids["msg-1"] = "req-1"
        adapter._prepare_outbound_media = AsyncMock(
            return_value={
                "data": b"image-bytes",
                "content_type": "image/png",
                "file_name": "demo.png",
                "detected_type": "image",
                "final_type": "image",
                "rejected": False,
                "reject_reason": None,
                "downgraded": False,
                "downgrade_note": None,
            }
        )
        adapter._upload_media_bytes = AsyncMock(return_value={"media_id": "media-1", "type": "image"})
        adapter._send_reply_request = AsyncMock(
            return_value={"headers": {"req_id": "req-1"}, "errcode": 0}
        )

        result = await adapter.send_image_file("chat-123", "/tmp/demo.png", reply_to="msg-1")

        assert result.success is True
        adapter._send_reply_request.assert_awaited_once()
        args = adapter._send_reply_request.await_args.args
        assert args[0] == "req-1"
        assert args[1] == {"msgtype": "image", "image": {"media_id": "media-1"}}


class TestExtractText:
    def test_extracts_plain_text(self):
        from gateway.platforms.wecom import WeComAdapter

        body = {
            "msgtype": "text",
            "text": {"content": "  hello world  "},
        }
        text, reply_text = WeComAdapter._extract_text(body)
        assert text == "hello world"
        assert reply_text is None

    def test_extracts_mixed_text(self):
        from gateway.platforms.wecom import WeComAdapter

        body = {
            "msgtype": "mixed",
            "mixed": {
                "msg_item": [
                    {"msgtype": "text", "text": {"content": "part1"}},
                    {"msgtype": "image", "image": {"url": "https://example.com/x.png"}},
                    {"msgtype": "text", "text": {"content": "part2"}},
                ]
            },
        }
        text, _reply_text = WeComAdapter._extract_text(body)
        assert text == "part1\npart2"

    def test_extracts_voice_and_quote(self):
        from gateway.platforms.wecom import WeComAdapter

        body = {
            "msgtype": "voice",
            "voice": {"content": "spoken text"},
            "quote": {"msgtype": "text", "text": {"content": "quoted"}},
        }
        text, reply_text = WeComAdapter._extract_text(body)
        assert text == "spoken text"
        assert reply_text == "quoted"


class TestCallbackDispatch:
    @pytest.mark.asyncio
    @pytest.mark.parametrize("cmd", ["aibot_msg_callback", "aibot_callback"])
    async def test_dispatch_accepts_new_and_legacy_callback_cmds(self, cmd):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._on_message = AsyncMock()

        await adapter._dispatch_payload({"cmd": cmd, "headers": {"req_id": "req-1"}, "body": {}})

        adapter._on_message.assert_awaited_once()


class TestPolicyHelpers:
    def test_dm_allowlist(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(
            PlatformConfig(enabled=True, extra={"dm_policy": "allowlist", "allow_from": ["user-1"]})
        )
        assert adapter._is_dm_allowed("user-1") is True
        assert adapter._is_dm_allowed("user-2") is False

    def test_group_allowlist_and_per_group_sender_allowlist(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(
            PlatformConfig(
                enabled=True,
                extra={
                    "group_policy": "allowlist",
                    "group_allow_from": ["group-1"],
                    "groups": {"group-1": {"allow_from": ["user-1"]}},
                },
            )
        )

        assert adapter._is_group_allowed("group-1", "user-1") is True
        assert adapter._is_group_allowed("group-1", "user-2") is False
        assert adapter._is_group_allowed("group-2", "user-1") is False


class TestMediaHelpers:
    def test_detect_wecom_media_type(self):
        from gateway.platforms.wecom import WeComAdapter

        assert WeComAdapter._detect_wecom_media_type("image/png") == "image"
        assert WeComAdapter._detect_wecom_media_type("video/mp4") == "video"
        assert WeComAdapter._detect_wecom_media_type("audio/amr") == "voice"
        assert WeComAdapter._detect_wecom_media_type("application/pdf") == "file"

    def test_voice_non_amr_downgrades_to_file(self):
        from gateway.platforms.wecom import WeComAdapter

        result = WeComAdapter._apply_file_size_limits(128, "voice", "audio/mpeg")

        assert result["final_type"] == "file"
        assert result["downgraded"] is True
        assert "AMR" in (result["downgrade_note"] or "")

    def test_oversized_file_is_rejected(self):
        from gateway.platforms.wecom import ABSOLUTE_MAX_BYTES, WeComAdapter

        result = WeComAdapter._apply_file_size_limits(ABSOLUTE_MAX_BYTES + 1, "file", "application/pdf")

        assert result["rejected"] is True
        assert "20MB" in (result["reject_reason"] or "")

    def test_decrypt_file_bytes_round_trip(self):
        from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
        from gateway.platforms.wecom import WeComAdapter

        plaintext = b"wecom-secret"
        key = os.urandom(32)
        pad_len = 32 - (len(plaintext) % 32)
        padded = plaintext + bytes([pad_len]) * pad_len
        encryptor = Cipher(algorithms.AES(key), modes.CBC(key[:16])).encryptor()
        encrypted = encryptor.update(padded) + encryptor.finalize()

        decrypted = WeComAdapter._decrypt_file_bytes(encrypted, base64.b64encode(key).decode("ascii"))

        assert decrypted == plaintext

    @pytest.mark.asyncio
    async def test_load_outbound_media_rejects_placeholder_path(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))

        with pytest.raises(ValueError, match="placeholder was not replaced"):
            await adapter._load_outbound_media("<path>")


class TestMediaUpload:
    @pytest.mark.asyncio
    async def test_upload_media_bytes_uses_sdk_sequence(self, monkeypatch):
        import gateway.platforms.wecom as wecom_module
        from gateway.platforms.wecom import (
            APP_CMD_UPLOAD_MEDIA_CHUNK,
            APP_CMD_UPLOAD_MEDIA_FINISH,
            APP_CMD_UPLOAD_MEDIA_INIT,
            WeComAdapter,
        )

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        calls = []

        async def fake_send_request(cmd, body, timeout=0):
            calls.append((cmd, body))
            if cmd == APP_CMD_UPLOAD_MEDIA_INIT:
                return {"errcode": 0, "body": {"upload_id": "upload-1"}}
            if cmd == APP_CMD_UPLOAD_MEDIA_CHUNK:
                return {"errcode": 0}
            if cmd == APP_CMD_UPLOAD_MEDIA_FINISH:
                return {
                    "errcode": 0,
                    "body": {
                        "media_id": "media-1",
                        "type": "file",
                        "created_at": "2026-03-18T00:00:00Z",
                    },
                }
            raise AssertionError(f"unexpected cmd {cmd}")

        monkeypatch.setattr(wecom_module, "UPLOAD_CHUNK_SIZE", 4)
        adapter._send_request = fake_send_request

        result = await adapter._upload_media_bytes(b"abcdefghij", "file", "demo.bin")

        assert result["media_id"] == "media-1"
        assert [cmd for cmd, _body in calls] == [
            APP_CMD_UPLOAD_MEDIA_INIT,
            APP_CMD_UPLOAD_MEDIA_CHUNK,
            APP_CMD_UPLOAD_MEDIA_CHUNK,
            APP_CMD_UPLOAD_MEDIA_CHUNK,
            APP_CMD_UPLOAD_MEDIA_FINISH,
        ]
        assert calls[1][1]["chunk_index"] == 0
        assert calls[2][1]["chunk_index"] == 1
        assert calls[3][1]["chunk_index"] == 2

    @pytest.mark.asyncio
    @patch("tools.url_safety.is_safe_url", return_value=True)
    async def test_download_remote_bytes_rejects_large_content_length(self, _mock_safe):
        from gateway.platforms.wecom import WeComAdapter

        class FakeResponse:
            headers = {"content-length": "10"}

            async def __aenter__(self):
                return self

            async def __aexit__(self, exc_type, exc, tb):
                return None

            def raise_for_status(self):
                return None

            async def aiter_bytes(self):
                yield b"abc"

        class FakeClient:
            def stream(self, method, url, headers=None):
                return FakeResponse()

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._http_client = FakeClient()

        with pytest.raises(ValueError, match="exceeds WeCom limit"):
            await adapter._download_remote_bytes("https://example.com/file.bin", max_bytes=4)

    @pytest.mark.asyncio
    async def test_cache_media_decrypts_url_payload_before_writing(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        plaintext = b"secret document bytes"
        key = os.urandom(32)
        pad_len = 32 - (len(plaintext) % 32)
        padded = plaintext + bytes([pad_len]) * pad_len

        from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes

        encryptor = Cipher(algorithms.AES(key), modes.CBC(key[:16])).encryptor()
        encrypted = encryptor.update(padded) + encryptor.finalize()
        adapter._download_remote_bytes = AsyncMock(
            return_value=(
                encrypted,
                {
                    "content-type": "application/octet-stream",
                    "content-disposition": 'attachment; filename="secret.bin"',
                },
            )
        )

        cached = await adapter._cache_media(
            "file",
            {
                "url": "https://example.com/secret.bin",
                "aeskey": base64.b64encode(key).decode("ascii"),
            },
        )

        assert cached is not None
        cached_path, content_type = cached
        assert Path(cached_path).read_bytes() == plaintext
        assert content_type == "application/octet-stream"


class TestSend:
    @pytest.mark.asyncio
    async def test_send_uses_proactive_payload(self):
        from gateway.platforms.wecom import APP_CMD_SEND, WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._send_request = AsyncMock(return_value={"headers": {"req_id": "req-1"}, "errcode": 0})

        result = await adapter.send("chat-123", "Hello WeCom")

        assert result.success is True
        adapter._send_request.assert_awaited_once_with(
            APP_CMD_SEND,
            {
                "chatid": "chat-123",
                "msgtype": "markdown",
                "markdown": {"content": "Hello WeCom"},
            },
        )

    @pytest.mark.asyncio
    async def test_send_reports_wecom_errors(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._send_request = AsyncMock(return_value={"errcode": 40001, "errmsg": "bad request"})

        result = await adapter.send("chat-123", "Hello WeCom")

        assert result.success is False
        assert "40001" in (result.error or "")

    @pytest.mark.asyncio
    async def test_send_image_falls_back_to_text_for_remote_url(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._send_media_source = AsyncMock(return_value=SendResult(success=False, error="upload failed"))
        adapter.send = AsyncMock(return_value=SendResult(success=True, message_id="msg-1"))

        result = await adapter.send_image("chat-123", "https://example.com/demo.png", caption="demo")

        assert result.success is True
        adapter.send.assert_awaited_once_with(chat_id="chat-123", content="demo\nhttps://example.com/demo.png", reply_to=None)

    @pytest.mark.asyncio
    async def test_send_voice_sends_caption_and_downgrade_note(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._prepare_outbound_media = AsyncMock(
            return_value={
                "data": b"voice-bytes",
                "content_type": "audio/mpeg",
                "file_name": "voice.mp3",
                "detected_type": "voice",
                "final_type": "file",
                "rejected": False,
                "reject_reason": None,
                "downgraded": True,
                "downgrade_note": "语音格式 audio/mpeg 不支持，企微仅支持 AMR 格式，已转为文件格式发送",
            }
        )
        adapter._upload_media_bytes = AsyncMock(return_value={"media_id": "media-1", "type": "file"})
        adapter._send_media_message = AsyncMock(return_value={"headers": {"req_id": "req-media"}, "errcode": 0})
        adapter.send = AsyncMock(return_value=SendResult(success=True, message_id="msg-1"))

        result = await adapter.send_voice("chat-123", "/tmp/voice.mp3", caption="listen")

        assert result.success is True
        adapter._send_media_message.assert_awaited_once_with("chat-123", "file", "media-1")
        assert adapter.send.await_count == 2
        adapter.send.assert_any_await(chat_id="chat-123", content="listen", reply_to=None)
        adapter.send.assert_any_await(
            chat_id="chat-123",
            content="ℹ️ 语音格式 audio/mpeg 不支持，企微仅支持 AMR 格式，已转为文件格式发送",
            reply_to=None,
        )


class TestInboundMessages:
    @pytest.mark.asyncio
    async def test_on_message_builds_event(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._text_batch_delay_seconds = 0  # disable batching for tests
        adapter.handle_message = AsyncMock()
        adapter._extract_media = AsyncMock(return_value=(["/tmp/test.png"], ["image/png"]))

        payload = {
            "cmd": "aibot_msg_callback",
            "headers": {"req_id": "req-1"},
            "body": {
                "msgid": "msg-1",
                "chatid": "group-1",
                "chattype": "group",
                "from": {"userid": "user-1"},
                "msgtype": "text",
                "text": {"content": "hello"},
            },
        }

        await adapter._on_message(payload)

        adapter.handle_message.assert_awaited_once()
        event = adapter.handle_message.await_args.args[0]
        assert event.text == "hello"
        assert event.source.chat_id == "group-1"
        assert event.source.user_id == "user-1"
        assert event.media_urls == ["/tmp/test.png"]
        assert event.media_types == ["image/png"]

    @pytest.mark.asyncio
    async def test_on_message_preserves_quote_context(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._text_batch_delay_seconds = 0  # disable batching for tests
        adapter.handle_message = AsyncMock()
        adapter._extract_media = AsyncMock(return_value=([], []))

        payload = {
            "cmd": "aibot_msg_callback",
            "headers": {"req_id": "req-1"},
            "body": {
                "msgid": "msg-1",
                "chatid": "group-1",
                "chattype": "group",
                "from": {"userid": "user-1"},
                "msgtype": "text",
                "text": {"content": "follow up"},
                "quote": {"msgtype": "text", "text": {"content": "quoted message"}},
            },
        }

        await adapter._on_message(payload)

        event = adapter.handle_message.await_args.args[0]
        assert event.reply_to_text == "quoted message"
        assert event.reply_to_message_id == "quote:msg-1"

    @pytest.mark.asyncio
    async def test_on_message_respects_group_policy(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(
            PlatformConfig(
                enabled=True,
                extra={"group_policy": "allowlist", "group_allow_from": ["group-allowed"]},
            )
        )
        adapter.handle_message = AsyncMock()
        adapter._extract_media = AsyncMock(return_value=([], []))

        payload = {
            "cmd": "aibot_callback",
            "headers": {"req_id": "req-1"},
            "body": {
                "msgid": "msg-1",
                "chatid": "group-blocked",
                "chattype": "group",
                "from": {"userid": "user-1"},
                "msgtype": "text",
                "text": {"content": "hello"},
            },
        }

        await adapter._on_message(payload)
        adapter.handle_message.assert_not_awaited()


class TestWeComZombieSessionFix:
    """Tests for PR #11572 — device_id, markdown reply, group req_id fallback."""

    def test_adapter_generates_stable_device_id_per_instance(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        assert isinstance(adapter._device_id, str)
        assert len(adapter._device_id) > 0
        # Second snapshot on the same adapter must be identical — only a fresh
        # adapter instance should get a new device_id (one-per-reconnect is the
        # zombie-session footgun we're fixing).
        assert adapter._device_id == adapter._device_id

    def test_different_adapter_instances_get_distinct_device_ids(self):
        from gateway.platforms.wecom import WeComAdapter

        a = WeComAdapter(PlatformConfig(enabled=True))
        b = WeComAdapter(PlatformConfig(enabled=True))
        assert a._device_id != b._device_id

    @pytest.mark.asyncio
    async def test_open_connection_includes_device_id_in_subscribe(self):
        from gateway.platforms.wecom import APP_CMD_SUBSCRIBE, WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._bot_id = "test-bot"
        adapter._secret = "test-secret"

        sent_payloads = []

        class _FakeWS:
            closed = False

            async def send_json(self, payload):
                sent_payloads.append(payload)

            async def close(self):
                return None

        class _FakeSession:
            def __init__(self, *args, **kwargs):
                pass

            async def ws_connect(self, *args, **kwargs):
                return _FakeWS()

            async def close(self):
                return None

        async def _fake_cleanup():
            return None

        async def _fake_handshake(req_id):
            return {"errcode": 0, "headers": {"req_id": req_id}}

        adapter._cleanup_ws = _fake_cleanup
        adapter._wait_for_handshake = _fake_handshake

        with patch("gateway.platforms.wecom.aiohttp.ClientSession", _FakeSession):
            await adapter._open_connection()

        assert len(sent_payloads) == 1
        subscribe = sent_payloads[0]
        assert subscribe["cmd"] == APP_CMD_SUBSCRIBE
        assert subscribe["body"]["bot_id"] == "test-bot"
        assert subscribe["body"]["secret"] == "test-secret"
        assert subscribe["body"]["device_id"] == adapter._device_id

    @pytest.mark.asyncio
    async def test_on_message_caches_last_req_id_per_chat(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._text_batch_delay_seconds = 0
        adapter.handle_message = AsyncMock()
        adapter._extract_media = AsyncMock(return_value=([], []))

        payload = {
            "cmd": "aibot_msg_callback",
            "headers": {"req_id": "req-abc"},
            "body": {
                "msgid": "msg-1",
                "chatid": "group-1",
                "chattype": "group",
                "from": {"userid": "user-1"},
                "msgtype": "text",
                "text": {"content": "hi"},
            },
        }

        await adapter._on_message(payload)
        assert adapter._last_chat_req_ids["group-1"] == "req-abc"

    @pytest.mark.asyncio
    async def test_on_message_does_not_cache_blocked_sender_req_id(self):
        """Blocked chats shouldn't populate the proactive-send fallback cache."""
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(
            PlatformConfig(
                enabled=True,
                extra={"group_policy": "allowlist", "group_allow_from": ["group-ok"]},
            )
        )
        adapter.handle_message = AsyncMock()
        adapter._extract_media = AsyncMock(return_value=([], []))

        payload = {
            "cmd": "aibot_msg_callback",
            "headers": {"req_id": "req-abc"},
            "body": {
                "msgid": "msg-1",
                "chatid": "group-blocked",
                "chattype": "group",
                "from": {"userid": "user-1"},
                "msgtype": "text",
                "text": {"content": "hi"},
            },
        }

        await adapter._on_message(payload)
        adapter.handle_message.assert_not_awaited()
        assert "group-blocked" not in adapter._last_chat_req_ids

    def test_remember_chat_req_id_is_bounded(self):
        from gateway.platforms.wecom import DEDUP_MAX_SIZE, WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        for i in range(DEDUP_MAX_SIZE + 50):
            adapter._remember_chat_req_id(f"chat-{i}", f"req-{i}")
        assert len(adapter._last_chat_req_ids) <= DEDUP_MAX_SIZE
        # The most recently remembered chat must still be present.
        latest = f"chat-{DEDUP_MAX_SIZE + 49}"
        assert adapter._last_chat_req_ids[latest] == f"req-{DEDUP_MAX_SIZE + 49}"

    def test_remember_chat_req_id_ignores_empty_values(self):
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._remember_chat_req_id("", "req-1")
        adapter._remember_chat_req_id("chat-1", "")
        adapter._remember_chat_req_id("   ", "   ")
        assert adapter._last_chat_req_ids == {}

    @pytest.mark.asyncio
    async def test_proactive_group_send_falls_back_to_cached_req_id(self):
        """Sending into a group without reply_to should use the last cached
        req_id via APP_CMD_RESPONSE — WeCom AI Bots cannot initiate APP_CMD_SEND
        in group chats (errcode 600039)."""
        from gateway.platforms.wecom import WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._last_chat_req_ids["group-1"] = "inbound-req-42"
        adapter._send_reply_request = AsyncMock(
            return_value={"headers": {"req_id": "inbound-req-42"}, "errcode": 0}
        )
        adapter._send_request = AsyncMock(
            return_value={"headers": {"req_id": "new"}, "errcode": 0}
        )

        result = await adapter.send("group-1", "ping", reply_to=None)

        assert result.success is True
        # Must route through reply (APP_CMD_RESPONSE), not proactive send.
        adapter._send_reply_request.assert_awaited_once()
        adapter._send_request.assert_not_awaited()
        args = adapter._send_reply_request.await_args.args
        assert args[0] == "inbound-req-42"
        assert args[1]["msgtype"] == "markdown"
        assert args[1]["markdown"]["content"] == "ping"

    @pytest.mark.asyncio
    async def test_proactive_send_without_cached_req_id_uses_app_cmd_send(self):
        """When we have no prior req_id (fresh DM target), APP_CMD_SEND is used."""
        from gateway.platforms.wecom import APP_CMD_SEND, WeComAdapter

        adapter = WeComAdapter(PlatformConfig(enabled=True))
        adapter._send_request = AsyncMock(
            return_value={"headers": {"req_id": "new"}, "errcode": 0}
        )

        result = await adapter.send("fresh-dm-chat", "ping", reply_to=None)

        assert result.success is True
        adapter._send_request.assert_awaited_once()
        cmd = adapter._send_request.await_args.args[0]
        assert cmd == APP_CMD_SEND