import logging
import uuid
from datetime import datetime
from unittest.mock import AsyncMock, patch

import pytest
import pytest_asyncio
from httpx import ASGITransport, AsyncClient
from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
from sqlalchemy.pool import StaticPool

from app.database import Base, get_db
from app.main import app
from app.api.deps import get_current_user
from app.middleware.logging_filter import APIKeyFilter
from app.models.user import User
from app.services.auth import create_access_token

from tests.fixtures.auth import _make_user, _to_uuid

pytest_plugins = [
    "tests.fixtures.database",
    "tests.fixtures.brands",
    "tests.fixtures.client",
    "tests.fixtures.content",
]


@pytest.fixture(autouse=True)
def _cleanup_dependency_overrides():
    """Ensure dependency_overrides are cleaned up after each test."""
    from app.main import app
    yield
    app.dependency_overrides.clear()


@pytest.fixture(autouse=True)
def _reset_rate_limiter():
    """Reset rate limiter state between tests to prevent cross-test contamination."""
    yield
    # Clear rate limiter's in-memory request records
    try:
        from app.middleware.rate_limit import MemoryRateLimitBackend
        # Find all MemoryRateLimitBackend instances and clear them
        import gc
        for obj in gc.get_objects():
            if isinstance(obj, MemoryRateLimitBackend):
                obj._requests.clear()
    except Exception:
        pass


@pytest.fixture(autouse=True)
def add_api_key_filter():
    root_logger = logging.getLogger()
    api_key_filter = APIKeyFilter()
    root_logger.addFilter(api_key_filter)
    yield
    root_logger.removeFilter(api_key_filter)


@pytest.fixture(scope="session", autouse=True)
def mock_scheduler():
    with patch("app.main.query_scheduler") as mock_sched:
        mock_sched.start = lambda: None
        mock_sched.shutdown = AsyncMock()
        yield


@pytest_asyncio.fixture
async def test_engine():
    engine = create_async_engine(
        "sqlite+aiosqlite:///:memory:",
        connect_args={"check_same_thread": False},
        poolclass=StaticPool,
    )
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)
    yield engine
    await engine.dispose()


@pytest_asyncio.fixture
async def test_session(test_engine):
    async_session_maker = async_sessionmaker(
        test_engine,
        class_=AsyncSession,
        expire_on_commit=False,
        autoflush=False,
        autocommit=False,
    )
    async with async_session_maker() as session:
        yield session


@pytest_asyncio.fixture
async def override_get_db(test_session):
    async def _get_db():
        yield test_session

    app.dependency_overrides[get_db] = _get_db
    yield test_session
    app.dependency_overrides.pop(get_db, None)


@pytest.fixture
def mock_user():
    user = AsyncMock()
    user.id = uuid.UUID("12345678-1234-1234-1234-123456789abc")
    user.email = "test@example.com"
    user.name = "Test User"
    user.plan = "free"
    user.max_queries = 5
    user.is_active = True
    user.created_at = datetime.now()
    return user


@pytest.fixture
def override_get_current_user(mock_user):
    async def _override():
        return mock_user

    app.dependency_overrides[get_current_user] = _override
    yield
    app.dependency_overrides.pop(get_current_user, None)


@pytest.fixture
def auth_token(mock_user):
    return create_access_token(data={"sub": str(mock_user.id)})


@pytest.fixture
def auth_headers(auth_token):
    return {"Authorization": f"Bearer {auth_token}"}


@pytest_asyncio.fixture
async def plain_client():
    transport = ASGITransport(app=app)
    async with AsyncClient(transport=transport, base_url="http://test") as client:
        yield client