from __future__ import annotations

from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from yuxi.channels.manager import ChannelManager
from yuxi.channels.registry import ChannelRegistry
from yuxi.channels.services.runtime_state import RuntimeState


class TestChannelManagerPhases:
    def test_initial_phase(self):
        manager = ChannelManager()
        assert manager.phase == "not_started"

    @pytest.mark.asyncio
    async def test_load_config_sets_phase(self):
        with (
            patch("yuxi.channels.manager._load_builtin_adapters"),
            patch("yuxi.channels.manager._BUILTIN_ADAPTERS", {}),
            patch("yuxi.config") as mock_config,
        ):
            mock_config.channels = {}
            manager = ChannelManager()
            await manager.load_config()
            assert manager.phase == "config_loaded"

    @pytest.mark.asyncio
    async def test_load_config_idempotent(self):
        with (
            patch("yuxi.channels.manager._load_builtin_adapters"),
            patch("yuxi.channels.manager._BUILTIN_ADAPTERS", {}),
            patch("yuxi.config") as mock_config,
        ):
            mock_config.channels = {}
            manager = ChannelManager()
            await manager.load_config()

            mock_config.channels = {"wx": {"enabled": True}}
            await manager.load_config()
            assert manager._channels_config == {}

    @pytest.mark.asyncio
    async def test_initialize_sets_fully_running(self):
        with (
            patch("yuxi.channels.manager._load_builtin_adapters"),
            patch("yuxi.channels.manager._BUILTIN_ADAPTERS", {}),
            patch("yuxi.config") as mock_config,
        ):
            mock_config.channels = {}
            mock_pg = MagicMock()
            mock_db = AsyncMock()
            mock_pg.__aenter__ = AsyncMock(return_value=mock_db)
            mock_pg.__aexit__ = AsyncMock(return_value=None)
            with (
                patch(
                    "yuxi.channels.manager.pg_manager.get_async_session_context",
                    return_value=mock_pg,
                ),
                patch.object(ChannelManager, "_ensure_virtual_department", AsyncMock()),
                patch.object(ChannelManager, "_ensure_default_agent_config", AsyncMock()),
            ):
                manager = ChannelManager()
                await manager.initialize()
                assert manager.phase == "fully_running"
                assert manager._initialized is True

    @pytest.mark.asyncio
    async def test_start_subscriptions_only_after_channels_started(self):
        manager = ChannelManager()
        assert manager.phase == "not_started"

        await manager.start_subscriptions()
        assert manager.phase == "not_started"

    @pytest.mark.asyncio
    async def test_prepare_bootstrap_only_after_config_loaded(self):
        manager = ChannelManager()
        await manager.prepare_bootstrap()
        assert manager.phase == "not_started"

    @pytest.mark.asyncio
    async def test_start_channels_allows_from_config_loaded_or_bootstrapped(self):
        with (
            patch("yuxi.channels.manager._load_builtin_adapters"),
            patch("yuxi.channels.manager._BUILTIN_ADAPTERS", {}),
            patch("yuxi.config") as mock_config,
        ):
            mock_config.channels = {}
            registry = ChannelRegistry()
            manager = ChannelManager(registry=registry)

            await manager.load_config()
            assert manager.phase == "config_loaded"

            await manager.start_channels()
            assert manager.phase == "channels_started"

    @pytest.mark.asyncio
    async def test_startup_idempotent(self):
        with (
            patch("yuxi.channels.manager._load_builtin_adapters"),
            patch("yuxi.channels.manager._BUILTIN_ADAPTERS", {}),
            patch("yuxi.config") as mock_config,
        ):
            mock_config.channels = {}
            manager = ChannelManager()

            manager._initialized = True
            await manager.startup()
            assert manager.phase == "not_started"

    @pytest.mark.asyncio
    async def test_startup_creates_context(self):
        with (
            patch("yuxi.channels.manager._load_builtin_adapters"),
            patch("yuxi.channels.manager._BUILTIN_ADAPTERS", {}),
            patch("yuxi.config") as mock_config,
        ):
            mock_config.channels = {}
            mock_pg = MagicMock()
            mock_db = AsyncMock()
            mock_pg.__aenter__ = AsyncMock(return_value=mock_db)
            mock_pg.__aexit__ = AsyncMock(return_value=None)
            with (
                patch(
                    "yuxi.channels.manager.pg_manager.get_async_session_context",
                    return_value=mock_pg,
                ),
                patch.object(ChannelManager, "_ensure_virtual_department", AsyncMock()),
                patch.object(ChannelManager, "_ensure_default_agent_config", AsyncMock()),
            ):
                manager = ChannelManager()
                await manager.startup()
                assert manager.context is not None
                assert manager.broadcaster is not None
                assert manager.watcher is not None
                assert manager.doctor is not None
                assert manager.phase == "fully_running"

    def test_new_properties_default(self):
        manager = ChannelManager()
        assert manager.context is None
        assert manager.broadcaster is None
        assert manager.watcher is None
        assert manager.doctor is None
        assert isinstance(manager.runtime_state, RuntimeState)
        assert manager.runtime_state.phase == "not_started"

    @pytest.mark.asyncio
    async def test_diagnose_channels_no_doctor(self):
        manager = ChannelManager()
        issues = await manager.diagnose_channels()
        assert issues == []

    @pytest.mark.asyncio
    async def test_auto_fix_no_doctor(self):
        manager = ChannelManager()
        result = await manager.auto_fix_channel(None)
        assert result is False

    @pytest.mark.asyncio
    async def test_reload_config_no_watcher(self):
        manager = ChannelManager()
        result = await manager.reload_config_now()
        assert result == {}