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

from app.database import Base, get_db
from app.main import app
from app.models.user import User
from app.utils.auth import create_access_token, hash_password

TEST_DB_URL = "sqlite+aiosqlite://"

test_engine = create_async_engine(TEST_DB_URL, echo=False)
TestSessionLocal = async_sessionmaker(
    bind=test_engine, class_=AsyncSession, expire_on_commit=False
)


async def override_get_db():
    async with TestSessionLocal() as session:
        try:
            yield session
            await session.commit()
        except Exception:
            await session.rollback()
            raise


app.dependency_overrides[get_db] = override_get_db


@pytest.fixture(autouse=True)
async def setup_db():
    async with test_engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)
    yield
    async with test_engine.begin() as conn:
        await conn.run_sync(Base.metadata.drop_all)


@pytest.fixture
def client():
    from fastapi.testclient import TestClient
    return TestClient(app)


@pytest.fixture
async def async_client():
    transport = ASGITransport(app=app)
    async with AsyncClient(transport=transport, base_url="http://test") as ac:
        yield ac


@pytest.fixture
async def test_user():
    async with TestSessionLocal() as session:
        user = User(
            email="test@example.com",
            username="testuser",
            hashed_password=hash_password("testpassword123"),
        )
        session.add(user)
        await session.commit()
        await session.refresh(user)
        return user


@pytest.fixture
async def auth_headers(test_user):
    token = create_access_token(test_user.id)
    return {"Authorization": f"Bearer {token}"}