from __future__ import annotations

from unittest.mock import AsyncMock, MagicMock

import pytest

from yuxi.channel.application.service.session_resolver import SessionResolver
from yuxi.channel.domain.model.binding.channel_binding import ChannelBinding
from yuxi.channel.domain.model.session.channel_session import ChannelSession


class TestSessionResolver:
    @pytest.fixture
    def mock_session_repo(self):
        return AsyncMock()

    @pytest.fixture
    def mock_binding_repo(self):
        return AsyncMock()

    @pytest.fixture
    def resolver(self, mock_session_repo, mock_binding_repo):
        return SessionResolver(
            session_repo=mock_session_repo,
            binding_repo=mock_binding_repo,
            default_agent_config_id=1,
        )

    @pytest.fixture
    def sample_payload(self):
        return {
            "channel_type": "web",
            "sender_id": "user1",
            "metadata": {
                "account_id": "acc1",
                "group_id": "",
                "is_group": False,
            },
        }

    @pytest.mark.asyncio
    async def test_resolve_new_session(self, resolver, mock_session_repo, mock_binding_repo, sample_payload):
        mock_binding_repo.find_binding.return_value = None
        mock_session_repo.get_or_create.return_value = ChannelSession(
            id=1,
            thread_id="thread123",
            user_id="user1",
            agent_id="1",
            channel_type="web",
            channel_session_key="user1",
            status="active",
            title=None,
        )
        result = await resolver.resolve(sample_payload)
        assert result is not None
        assert result.thread_id == "thread123"

    @pytest.mark.asyncio
    async def test_resolve_with_binding(self, resolver, mock_session_repo, mock_binding_repo, sample_payload):
        mock_binding_repo.find_binding.return_value = ChannelBinding(
            id=1,
            channel_type="web",
            account_id="acc1",
            group_id="",
            agent_config_id=2,
        )
        mock_session_repo.get_or_create.return_value = ChannelSession(
            id=1,
            thread_id="thread123",
            user_id="user1",
            agent_id="2",
            channel_type="web",
            channel_session_key="user1",
            status="active",
            title=None,
        )
        result = await resolver.resolve(sample_payload)
        assert result is not None
        mock_session_repo.get_or_create.assert_awaited_once()

    @pytest.mark.asyncio
    async def test_resolve_with_agent_config_id(self, resolver, mock_session_repo, mock_binding_repo, sample_payload):
        sample_payload["agent_config_id"] = 3
        mock_binding_repo.find_binding.return_value = None
        mock_session_repo.get_or_create.return_value = ChannelSession(
            id=1,
            thread_id="thread123",
            user_id="user1",
            agent_id="3",
            channel_type="web",
            channel_session_key="user1",
            status="active",
            title=None,
        )
        result = await resolver.resolve(sample_payload)
        assert result is not None

    @pytest.mark.asyncio
    async def test_resolve_group_session(self, resolver, mock_session_repo, mock_binding_repo, sample_payload):
        sample_payload["metadata"]["is_group"] = True
        sample_payload["metadata"]["group_id"] = "group1"
        mock_binding_repo.find_binding.return_value = None
        mock_session_repo.get_or_create.return_value = ChannelSession(
            id=1,
            thread_id="thread123",
            user_id="user1",
            agent_id="1",
            channel_type="web",
            channel_session_key="user1:web:group1",
            status="active",
            title=None,
        )
        result = await resolver.resolve(sample_payload)
        assert result is not None

    @pytest.mark.asyncio
    async def test_resolve_session_error(self, resolver, mock_session_repo, mock_binding_repo, sample_payload):
        mock_binding_repo.find_binding.return_value = None
        mock_session_repo.get_or_create.side_effect = Exception("db error")
        result = await resolver.resolve(sample_payload)
        assert result is None

    def test_resolve_session_key_main(self, resolver):
        payload = {
            "channel_type": "web",
            "sender_id": "user1",
            "metadata": {"is_group": False},
        }
        key = resolver._resolve_session_key(payload, "web", "user1", None)
        assert key == "user1"

    def test_resolve_session_key_channel_group(self, resolver):
        payload = {
            "channel_type": "web",
            "sender_id": "user1",
            "metadata": {"is_group": True, "group_id": "group1"},
        }
        key = resolver._resolve_session_key(payload, "web", "user1", None)
        assert key == "user1:web:group1"

    def test_resolve_session_key_custom(self, resolver):
        payload = {
            "channel_type": "web",
            "sender_id": "user1",
            "metadata": {
                "session_key_strategy": "custom",
                "session_key_prefix": "pre",
                "session_key": "custom_key",
            },
        }
        key = resolver._resolve_session_key(payload, "web", "user1", None)
        assert key == "pre:custom_key"

    def test_resolve_session_key_with_binding(self, resolver):
        binding = ChannelBinding(
            id=1,
            channel_type="web",
            account_id="acc1",
            group_id="group1",
            agent_config_id=1,
            session_key_strategy="main",
        )
        payload = {
            "channel_type": "web",
            "sender_id": "user1",
            "metadata": {},
        }
        key = resolver._resolve_session_key(payload, "web", "user1", binding)
        assert key == "user1"

    @pytest.mark.asyncio
    async def test_resolve_agent_config_from_binding(self, resolver, mock_binding_repo):
        mock_binding_repo.find_binding.return_value = ChannelBinding(
            id=1,
            channel_type="web",
            account_id="acc1",
            group_id="",
            agent_config_id=5,
        )
        result = await resolver._resolve_agent_config("web", {"account_id": "acc1", "group_id": ""})
        assert result == 5

    @pytest.mark.asyncio
    async def test_resolve_agent_config_default(self, resolver, mock_binding_repo):
        mock_binding_repo.find_binding.return_value = None
        result = await resolver._resolve_agent_config("web", {"account_id": "acc1", "group_id": ""})
        assert result == 1