import pytest
from httpx import AsyncClient, ASGITransport
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from backend.main import app
from backend.models.base import Base
from backend.core.database import get_db

TEST_DATABASE_URL = "sqlite:///./test.db"

engine = create_engine(TEST_DATABASE_URL, connect_args={"check_same_thread": False})
TestingSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)


def override_get_db():
    db = TestingSessionLocal()
    try:
        yield db
    finally:
        db.close()


@pytest.fixture(autouse=True)
def setup_db():
    Base.metadata.create_all(bind=engine)
    app.dependency_overrides[get_db] = override_get_db
    yield
    Base.metadata.drop_all(bind=engine)
    app.dependency_overrides.clear()


@pytest.mark.asyncio
async def test_register_and_login():
    async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as client:
        r = await client.post("/api/auth/register", json={
            "email": "test@example.com",
            "full_name": "Test User",
            "password": "secret123",
        })
        assert r.status_code == 201
        assert r.json()["email"] == "test@example.com"

        r = await client.post("/api/auth/login", data={
            "username": "test@example.com",
            "password": "secret123",
        })
        assert r.status_code == 200
        assert "access_token" in r.json()