"""
Pytest configuration and fixtures
"""
import os
import pytest
from datetime import date
from typing import Generator
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, Session
from fastapi.testclient import TestClient

from app.main import app
from app.database import Base, get_db
from app.config import get_settings
from app.models.asset import Asset
from app.models.price import PriceData
from app.models.portfolio import Portfolio, PortfolioAsset
from app.models.backtest import BacktestRun


# Test database URL
TEST_DATABASE_URL = os.getenv(
    "TEST_DATABASE_URL",
    "postgresql://postgres:postgres@localhost:5432/pension_quant_test"
)

# Create test engine
test_engine = create_engine(TEST_DATABASE_URL)
TestingSessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=test_engine)


@pytest.fixture(scope="session", autouse=True)
def setup_test_database():
    """Create test database tables before all tests"""
    Base.metadata.create_all(bind=test_engine)
    yield
    Base.metadata.drop_all(bind=test_engine)


@pytest.fixture(scope="function")
def db_session() -> Generator[Session, None, None]:
    """Create a new database session for each test"""
    connection = test_engine.connect()
    transaction = connection.begin()
    session = TestingSessionLocal(bind=connection)

    yield session

    session.close()
    transaction.rollback()
    connection.close()


@pytest.fixture(scope="function")
def client(db_session: Session) -> Generator[TestClient, None, None]:
    """Create a FastAPI test client"""
    def override_get_db():
        try:
            yield db_session
        finally:
            pass

    app.dependency_overrides[get_db] = override_get_db

    with TestClient(app) as test_client:
        yield test_client

    app.dependency_overrides.clear()


@pytest.fixture
def sample_assets(db_session: Session):
    """Create sample assets for testing"""
    assets = [
        Asset(
            ticker="005930",
            name="삼성전자",
            market="KOSPI",
            market_cap=400000000000000,
            stock_type="보통주",
            sector="전기전자",
            last_price=70000,
            eps=5000,
            bps=45000,
            base_date=date(2023, 12, 31),
            is_active=True
        ),
        Asset(
            ticker="000660",
            name="SK하이닉스",
            market="KOSPI",
            market_cap=100000000000000,
            stock_type="보통주",
            sector="전기전자",
            last_price=120000,
            eps=8000,
            bps=60000,
            base_date=date(2023, 12, 31),
            is_active=True
        ),
        Asset(
            ticker="035420",
            name="NAVER",
            market="KOSPI",
            market_cap=30000000000000,
            stock_type="보통주",
            sector="서비스업",
            last_price=200000,
            eps=10000,
            bps=80000,
            base_date=date(2023, 12, 31),
            is_active=True
        ),
    ]

    for asset in assets:
        db_session.add(asset)

    db_session.commit()

    return assets


@pytest.fixture
def sample_price_data(db_session: Session, sample_assets):
    """Create sample price data for testing"""
    from datetime import datetime, timedelta

    prices = []
    base_date = datetime(2023, 1, 1)

    for i in range(30):  # 30 days of data
        current_date = base_date + timedelta(days=i)

        for asset in sample_assets:
            price = PriceData(
                ticker=asset.ticker,
                timestamp=current_date,
                open=asset.last_price * 0.99,
                high=asset.last_price * 1.02,
                low=asset.last_price * 0.98,
                close=asset.last_price * (1 + (i % 5) * 0.01),
                volume=1000000
            )
            prices.append(price)
            db_session.add(price)

    db_session.commit()

    return prices


@pytest.fixture
def sample_portfolio(db_session: Session, sample_assets):
    """Create a sample portfolio for testing"""
    portfolio = Portfolio(
        name="테스트 포트폴리오",
        description="통합 테스트용 포트폴리오",
        user_id="test_user"
    )
    db_session.add(portfolio)
    db_session.flush()

    # Add portfolio assets
    portfolio_assets = [
        PortfolioAsset(
            portfolio_id=portfolio.id,
            ticker="005930",
            target_ratio=40.0
        ),
        PortfolioAsset(
            portfolio_id=portfolio.id,
            ticker="000660",
            target_ratio=30.0
        ),
        PortfolioAsset(
            portfolio_id=portfolio.id,
            ticker="035420",
            target_ratio=30.0
        ),
    ]

    for pa in portfolio_assets:
        db_session.add(pa)

    db_session.commit()
    db_session.refresh(portfolio)

    return portfolio