"""
Test configuration and fixtures.
"""
import asyncio
import uuid
from typing 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.core.config import settings
from app.core.database import Base, get_db
from app.core.security import create_access_token, hash_password
from app.main import app
from app.models.user import AuthProvider, Profile, User

# Use a separate test database
TEST_DATABASE_URL = settings.DATABASE_URL.replace("/jobportal", "/jobportal_test")

engine_test = create_async_engine(TEST_DATABASE_URL, echo=False)
async_session_test = async_sessionmaker(engine_test, class_=AsyncSession, expire_on_commit=False)


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


@pytest_asyncio.fixture(autouse=True)
async def setup_database():
    """Create tables before tests and drop after."""
    async with engine_test.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)
    yield
    async with engine_test.begin() as conn:
        await conn.run_sync(Base.metadata.drop_all)


@pytest_asyncio.fixture
async def db_session() -> AsyncGenerator[AsyncSession, None]:
    """Provide a test database session."""
    async with async_session_test() as session:
        yield session
        await session.rollback()


@pytest_asyncio.fixture
async def client(db_session: AsyncSession) -> AsyncGenerator[AsyncClient, None]:
    """Provide a test HTTP client."""

    async def override_get_db():
        yield db_session

    app.dependency_overrides[get_db] = override_get_db

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

    app.dependency_overrides.clear()


@pytest_asyncio.fixture
async def test_user(db_session: AsyncSession) -> User:
    """Create a test user."""
    user = User(
        id=uuid.uuid4(),
        email="test@example.com",
        hashed_password=hash_password("testpass123"),
        full_name="Test User",
        role="candidate",
        auth_provider=AuthProvider.LOCAL,
        is_active=True,
        is_verified=True,
    )
    db_session.add(user)

    profile = Profile(user_id=user.id)
    db_session.add(profile)

    await db_session.commit()
    await db_session.refresh(user)
    return user


@pytest_asyncio.fixture
async def admin_user(db_session: AsyncSession) -> User:
    """Create a test admin user."""
    user = User(
        id=uuid.uuid4(),
        email="admin@example.com",
        hashed_password=hash_password("adminpass123"),
        full_name="Admin User",
        role="admin",
        auth_provider=AuthProvider.LOCAL,
        is_active=True,
        is_verified=True,
        is_superuser=True,
    )
    db_session.add(user)
    await db_session.commit()
    await db_session.refresh(user)
    return user


@pytest_asyncio.fixture
async def auth_headers(test_user: User) -> dict:
    """Generate auth headers for test user."""
    token = create_access_token(subject=str(test_user.id))
    return {"Authorization": f"Bearer {token}"}


@pytest_asyncio.fixture
async def admin_headers(admin_user: User) -> dict:
    """Generate auth headers for admin user."""
    token = create_access_token(subject=str(admin_user.id))
    return {"Authorization": f"Bearer {token}"}