"""测试配置和 fixtures。"""

import os
from collections.abc import AsyncGenerator
from unittest.mock import AsyncMock, patch

import pytest
from fastapi.testclient import TestClient
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine

os.environ.setdefault("SECRET_KEY", "test-secret-key-for-testing")
os.environ.setdefault("DATABASE_URL", "sqlite+aiosqlite:///:memory:")

from app.core.security import create_access_token
from app.api.stories import _request_log
from app.db.database import get_db
from app.db.models import Base, Story, User
from app.main import app


@pytest.fixture
async def async_engine():
    """创建内存数据库引擎。"""
    engine = create_async_engine("sqlite+aiosqlite:///:memory:", echo=False)
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)
    yield engine
    await engine.dispose()


@pytest.fixture
async def db_session(async_engine) -> AsyncGenerator[AsyncSession, None]:
    """创建数据库会话。"""
    session_factory = async_sessionmaker(
        async_engine, class_=AsyncSession, expire_on_commit=False
    )
    async with session_factory() as session:
        yield session


@pytest.fixture
async def test_user(db_session: AsyncSession) -> User:
    """创建测试用户。"""
    user = User(
        id="github:12345",
        name="Test User",
        avatar_url="https://example.com/avatar.png",
        provider="github",
    )
    db_session.add(user)
    await db_session.commit()
    await db_session.refresh(user)
    return user


@pytest.fixture
async def test_story(db_session: AsyncSession, test_user: User) -> Story:
    """创建测试故事。"""
    story = Story(
        user_id=test_user.id,
        title="测试故事",
        story_text="从前有一只小兔子...",
        cover_prompt="A cute rabbit in a forest",
        mode="generated",
    )
    db_session.add(story)
    await db_session.commit()
    await db_session.refresh(story)
    return story


@pytest.fixture
def auth_token(test_user: User) -> str:
    """生成测试用户的 JWT token。"""
    return create_access_token({"sub": test_user.id})


@pytest.fixture
def client(db_session: AsyncSession) -> TestClient:
    """创建测试客户端。"""

    async def override_get_db():
        yield db_session

    app.dependency_overrides[get_db] = override_get_db
    with TestClient(app) as c:
        yield c
    app.dependency_overrides.clear()


@pytest.fixture
def auth_client(client: TestClient, auth_token: str) -> TestClient:
    """带认证的测试客户端。"""
    client.cookies.set("access_token", auth_token)
    return client


@pytest.fixture(autouse=True)
def clear_rate_limit_cache():
    """确保每个测试用例的限流缓存互不影响。"""
    _request_log.clear()
    yield
    _request_log.clear()


@pytest.fixture
def mock_text_provider():
    """Mock 文本生成适配器 API 调用。"""
    from app.services.adapters.text.models import StoryOutput

    mock_result = StoryOutput(
        mode="generated",
        title="小兔子的冒险",
        story_text="从前有一只小兔子...",
        cover_prompt_suggestion="A cute rabbit",
    )

    with patch("app.api.stories.generate_story_content", new_callable=AsyncMock) as mock:
        mock.return_value = mock_result
        yield mock


@pytest.fixture
def mock_image_provider():
    """Mock 图像生成。"""
    with patch("app.api.stories.generate_image", new_callable=AsyncMock) as mock:
        mock.return_value = "https://example.com/image.png"
        yield mock


@pytest.fixture
def mock_tts_provider():
    """Mock TTS。"""
    with patch("app.api.stories.text_to_speech", new_callable=AsyncMock) as mock:
        mock.return_value = b"fake-audio-bytes"
        yield mock


@pytest.fixture
def mock_all_providers(mock_text_provider, mock_image_provider, mock_tts_provider):
    """Mock 所有 AI 供应商。"""
    return {
        "text_primary": mock_text_provider,
        "image_primary": mock_image_provider,
        "tts_primary": mock_tts_provider,
    }