# tests/conftest.py

import pytest
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from fastapi.testclient import TestClient

from app.main import app
from app.db.base import Base
from app.db.session import get_db


# Use in-memory SQLite for tests
TEST_DATABASE_URL = "sqlite+pysqlite:///:memory:"


@pytest.fixture(scope="function")
def db_session():
    """
    Creates a new database session for a test.
    Rolls back everything after test finishes.
    """

    engine = create_engine(
        TEST_DATABASE_URL,
        connect_args={"check_same_thread": False},
    )

    TestingSessionLocal = sessionmaker(
        autocommit=False,
        autoflush=False,
        bind=engine,
    )

    # Create tables
    Base.metadata.create_all(bind=engine)

    db = TestingSessionLocal()

    try:
        yield db
    finally:
        db.close()
        Base.metadata.drop_all(bind=engine)


@pytest.fixture(scope="function")
def client(db_session):
    """
    Overrides get_db dependency to use test database.
    """

    def override_get_db():
        try:
            yield db_session
        finally:
            pass

    app.dependency_overrides[get_db] = override_get_db

    with TestClient(app) as c:
        yield c

    app.dependency_overrides.clear()