"""Shared pytest fixtures for all tests."""

import asyncio
from typing import AsyncGenerator, Generator

import pytest
from httpx import ASGITransport, AsyncClient
from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
from sqlalchemy.orm import sessionmaker

from src.database import Base
from src.main import app


@pytest.fixture(scope="session")
def event_loop() -> Generator:
    """Create an event loop for the test session."""
    loop = asyncio.get_event_loop_policy().new_event_loop()
    yield loop
    loop.close()


@pytest.fixture(scope="function")
async def test_engine():
    """Create an in-memory SQLite database engine for testing."""
    engine = create_async_engine(
        "sqlite+aiosqlite:///:memory:",
        echo=False,
    )

    # Create all tables
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)

    yield engine

    # Cleanup
    await engine.dispose()


@pytest.fixture(scope="function")
async def async_session(test_engine) -> AsyncGenerator[AsyncSession, None]:
    """Provide an async database session for tests."""
    async_session_maker_local = sessionmaker(
        test_engine,
        class_=AsyncSession,
        expire_on_commit=False,
    )

    async with async_session_maker_local() as session:
        yield session


@pytest.fixture(scope="function")
async def patched_session_maker(test_engine):
    """Patch async_session_maker for resolver tests."""
    test_session_maker = sessionmaker(
        test_engine,
        class_=AsyncSession,
        expire_on_commit=False,
    )

    # Patch the session maker in both places
    import src.database
    import src.resolvers.member

    original_db = src.database.async_session_maker
    original_resolver = src.resolvers.member.async_session_maker

    src.database.async_session_maker = test_session_maker
    src.resolvers.member.async_session_maker = test_session_maker

    yield test_session_maker

    # Restore originals
    src.database.async_session_maker = original_db
    src.resolvers.member.async_session_maker = original_resolver


@pytest.fixture(scope="function")
async def graphql_client(test_engine) -> AsyncGenerator[AsyncClient, None]:
    """Provide a test client for GraphQL API testing."""
    # Override the database dependency to use test database
    from src.database import async_session_maker as original_session_maker

    test_session_maker = sessionmaker(
        test_engine,
        class_=AsyncSession,
        expire_on_commit=False,
    )

    # Monkey patch the session maker for this test
    import src.database
    original = src.database.async_session_maker
    src.database.async_session_maker = test_session_maker

    # Also update the import in resolvers
    import src.resolvers.member
    src.resolvers.member.async_session_maker = test_session_maker

    async with AsyncClient(
        transport=ASGITransport(app=app),
        base_url="http://test"
    ) as client:
        yield client

    # Restore original session maker
    src.database.async_session_maker = original
    src.resolvers.member.async_session_maker = original