"""FluentGerman.ai — Test configuration & fixtures."""

import asyncio
from collections.abc import AsyncGenerator

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

from app.config import Settings, get_settings
from app.database import Base, get_db
from app.main import app

# Use SQLite for tests (in-memory)
TEST_DATABASE_URL = "sqlite+aiosqlite:///./test.db"


def get_test_settings() -> Settings:
    return Settings(
        database_url=TEST_DATABASE_URL,
        secret_key="test-secret-key",
        llm_api_key="test-key",
        admin_password="testadmin123",
    )


test_engine = create_async_engine(TEST_DATABASE_URL, echo=False)
test_session = async_sessionmaker(test_engine, class_=AsyncSession, expire_on_commit=False)


async def override_get_db() -> AsyncGenerator[AsyncSession, None]:
    async with test_session() as session:
        yield session


app.dependency_overrides[get_db] = override_get_db
app.dependency_overrides[get_settings] = get_test_settings


@pytest_asyncio.fixture(autouse=True)
async def setup_database():
    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_asyncio.fixture
async def client() -> AsyncGenerator[AsyncClient, None]:
    transport = ASGITransport(app=app)
    async with AsyncClient(transport=transport, base_url="http://test") as c:
        yield c


@pytest_asyncio.fixture
async def admin_token(client: AsyncClient) -> str:
    """Create admin and return token."""
    from app.auth import hash_password
    from app.models import User

    async with test_session() as db:
        admin = User(
            username="admin",
            email="admin@test.com",
            hashed_password=hash_password("admin123"),
            is_admin=True,
        )
        db.add(admin)
        await db.commit()

    resp = await client.post("/api/auth/login", json={"username": "admin", "password": "admin123"})
    return resp.json()["access_token"]


@pytest_asyncio.fixture
async def user_token(client: AsyncClient, admin_token: str) -> str:
    """Create a regular user via admin API and return their token."""
    await client.post(
        "/api/users/",
        json={"username": "testuser", "email": "user@test.com", "password": "user123"},
        headers={"Authorization": f"Bearer {admin_token}"},
    )
    resp = await client.post("/api/auth/login", json={"username": "testuser", "password": "user123"})
    return resp.json()["access_token"]