"""Tests for /title gateway slash command.

Tests the _handle_title_command handler (set/show session titles)
across all gateway messenger platforms.
"""

from types import SimpleNamespace
from unittest.mock import AsyncMock, MagicMock

import pytest

from gateway.config import GatewayConfig, Platform, PlatformConfig
from gateway.platforms.base import MessageEvent
from gateway.session import SessionSource


def _make_event(text="/title", platform=Platform.TELEGRAM,
                user_id="12345", chat_id="67890"):
    """Build a MessageEvent for testing."""
    source = SessionSource(
        platform=platform,
        user_id=user_id,
        chat_id=chat_id,
        user_name="testuser",
    )
    return MessageEvent(text=text, source=source)


def _make_runner(session_db=None):
    """Create a bare GatewayRunner with a mock session_store and optional session_db."""
    from gateway.run import GatewayRunner
    runner = object.__new__(GatewayRunner)
    runner.adapters = {}
    runner._voice_mode = {}
    # Gateway holds the async facade; the slash handlers await it.
    if session_db is not None:
        from hermes_state import AsyncSessionDB
        session_db = AsyncSessionDB(session_db)
    runner._session_db = session_db

    # Mock session_store that returns a session entry with a known session_id
    mock_session_entry = MagicMock()
    mock_session_entry.session_id = "test_session_123"
    mock_session_entry.session_key = "telegram:12345:67890"
    mock_store = MagicMock()
    mock_store.get_or_create_session.return_value = mock_session_entry
    runner.session_store = mock_store

    return runner


# ---------------------------------------------------------------------------
# _handle_title_command
# ---------------------------------------------------------------------------


class TestHandleTitleCommand:
    """Tests for GatewayRunner._handle_title_command."""


    @pytest.mark.asyncio
    async def test_title_conflict(self, tmp_path):
        """Setting a title already used by another session returns error."""
        from hermes_state import SessionDB
        db = SessionDB(db_path=tmp_path / "state.db")
        db.create_session("other_session", "telegram")
        db.set_session_title("other_session", "Taken Title")
        db.create_session("test_session_123", "telegram")

        runner = _make_runner(session_db=db)
        event = _make_event(text="/title Taken Title")
        result = await runner._handle_title_command(event)
        assert "already in use" in result
        assert "⚠️" in result
        db.close()


    @pytest.mark.asyncio
    async def test_title_control_chars_sanitized(self, tmp_path):
        """Control characters are stripped and sanitized title is stored."""
        from hermes_state import SessionDB
        db = SessionDB(db_path=tmp_path / "state.db")
        db.create_session("test_session_123", "telegram")

        runner = _make_runner(session_db=db)
        event = _make_event(text="/title hello\x00world")
        result = await runner._handle_title_command(event)
        assert "helloworld" in result
        assert db.get_session_title("test_session_123") == "helloworld"
        db.close()


    @pytest.mark.asyncio
    async def test_set_title_propagates_to_telegram_topic_rename(self, tmp_path):
        """/title <name> also renames the visible Telegram topic, not just the DB."""
        from hermes_state import SessionDB
        db = SessionDB(db_path=tmp_path / "state.db")
        db.create_session("test_session_123", "telegram")

        runner = _make_runner(session_db=db)
        runner._schedule_telegram_topic_title_rename = MagicMock()

        event = _make_event(text="/title My Topic Name")
        result = await runner._handle_title_command(event)

        assert "My Topic Name" in result
        runner._schedule_telegram_topic_title_rename.assert_called_once_with(
            event.source, "test_session_123", "My Topic Name"
        )
        db.close()

    @pytest.mark.asyncio
    async def test_show_title_does_not_rename_topic(self, tmp_path):
        """Showing the title (no arg) must not trigger a topic rename."""
        from hermes_state import SessionDB
        db = SessionDB(db_path=tmp_path / "state.db")
        db.create_session("test_session_123", "telegram")
        db.set_session_title("test_session_123", "Existing Title")

        runner = _make_runner(session_db=db)
        runner._schedule_telegram_topic_title_rename = MagicMock()

        event = _make_event(text="/title")
        await runner._handle_title_command(event)

        runner._schedule_telegram_topic_title_rename.assert_not_called()
        db.close()


# ---------------------------------------------------------------------------
# /title in help and known_commands
# ---------------------------------------------------------------------------


class TestTitleInHelp:
    """Verify /title appears in help text and known commands."""

    @pytest.mark.asyncio
    async def test_title_in_help_output(self):
        """The /help output includes /title."""
        runner = _make_runner()
        event = _make_event(text="/help")
        # Need hooks for help command
        from gateway.hooks import HookRegistry
        runner.hooks = HookRegistry()
        result = await runner._handle_help_command(event)
        assert "/title" in result


# ---------------------------------------------------------------------------
# /new with title
# ---------------------------------------------------------------------------


class TestResetCommandWithTitle:
    """Tests for GatewayRunner._handle_reset_command with a title argument."""


    @pytest.mark.asyncio
    async def test_reset_command_duplicate_title_surfaces_warning(self):
        """/new <title> with an already-in-use title returns a warning in the reply."""
        from datetime import datetime

        from gateway.run import GatewayRunner
        from gateway.session import SessionEntry, SessionSource, build_session_key

        runner = object.__new__(GatewayRunner)
        runner.config = GatewayConfig(
            platforms={Platform.TELEGRAM: PlatformConfig(enabled=True, token="***")}
        )
        adapter = MagicMock()
        adapter.send = AsyncMock()
        runner.adapters = {Platform.TELEGRAM: adapter}
        runner._voice_mode = {}
        runner.hooks = SimpleNamespace(emit=AsyncMock(), loaded_hooks=False)
        runner._session_model_overrides = {}
        runner._pending_model_notes = {}
        runner._background_tasks = set()

        source = SessionSource(
            platform=Platform.TELEGRAM,
            user_id="12345",
            chat_id="67890",
            user_name="testuser",
        )
        session_key = build_session_key(source)
        new_session_entry = SessionEntry(
            session_key=session_key,
            session_id="sess-new",
            created_at=datetime.now(),
            updated_at=datetime.now(),
            platform=Platform.TELEGRAM,
            chat_type="dm",
        )
        runner.session_store = MagicMock()
        runner.session_store.get_or_create_session.return_value = new_session_entry
        runner.session_store.reset_session.return_value = new_session_entry
        runner.session_store._entries = {session_key: new_session_entry}
        runner.session_store._generate_session_key.return_value = session_key
        runner._running_agents = {}
        runner._pending_messages = {}
        runner._pending_approvals = {}
        runner._session_db = AsyncMock()
        runner._session_db.set_session_title.side_effect = ValueError(
            "Title 'Dup' is already in use by session abc-123"
        )
        runner._agent_cache = {}
        runner._agent_cache_lock = None
        runner._is_user_authorized = lambda _source: True
        runner._format_session_info = lambda: ""

        event = _make_event(text="/new Dup")
        result = await runner._handle_reset_command(event)

        runner._session_db.set_session_title.assert_called_once()
        reply = str(result)
        assert "already in use" in reply
        assert "session started untitled" in reply
        # Header must NOT claim the rejected title as the session name
        assert "New session started: Dup" not in reply


# ---------------------------------------------------------------------------
# /new in help output
# ---------------------------------------------------------------------------


class TestNewInHelp:
    """Verify /new appears in help text with the [name] args hint."""

    def test_new_command_in_help_output(self):
        """The gateway help output includes /new with the [name] hint."""
        from hermes_cli.commands import gateway_help_lines
        lines = gateway_help_lines()
        new_line = next((line for line in lines if line.startswith("`/new ")), None)
        assert new_line is not None
        assert "[name]" in new_line