# tests/conftest.py
import pytest
from fastapi.testclient import TestClient
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.pool import StaticPool

from main import app
from app.core.database import get_db, Base
# Import all models to ensure they're registered with Base metadata
from models.database_models import User, Product, Stock, Shop, MarketplaceImportJob, ShopProduct
from middleware.auth import AuthManager
import uuid

# Use in-memory SQLite database for tests
SQLALCHEMY_TEST_DATABASE_URL = "sqlite:///:memory:"


@pytest.fixture(scope="session")
def engine():
    """Create test database engine"""
    return create_engine(
        SQLALCHEMY_TEST_DATABASE_URL,
        connect_args={"check_same_thread": False},
        poolclass=StaticPool,
        echo=False  # Set to True for SQL debugging
    )


@pytest.fixture(scope="session")
def testing_session_local(engine):
    """Create session factory for tests"""
    return sessionmaker(autocommit=False, autoflush=False, bind=engine)


@pytest.fixture(scope="function")
def db(engine, testing_session_local):
    """Create a database session for direct database operations"""
    # Create all tables
    Base.metadata.create_all(bind=engine)

    # Create session
    db_session = testing_session_local()

    try:
        yield db_session
    finally:
        db_session.close()
        # Clean up all data after each test
        Base.metadata.drop_all(bind=engine)
        Base.metadata.create_all(bind=engine)


@pytest.fixture(scope="function")
def client(db):  # Now client depends on db
    """Create a test client with database dependency override"""

    # Override the dependency to use our test database
    def override_get_db():
        try:
            yield db
        finally:
            pass  # Don't close here, the db fixture handles it

    app.dependency_overrides[get_db] = override_get_db

    try:
        client = TestClient(app)
        yield client
    finally:
        # Clean up the dependency override
        if get_db in app.dependency_overrides:
            del app.dependency_overrides[get_db]


@pytest.fixture(scope="session")
def auth_manager():
    """Create auth manager instance (session scope since it's stateless)"""
    return AuthManager()


@pytest.fixture
def test_user(db, auth_manager):
    """Create a test user with unique username"""
    unique_id = str(uuid.uuid4())[:8]  # Short unique identifier
    hashed_password = auth_manager.hash_password("testpass123")
    user = User(
        email=f"test_{unique_id}@example.com",
        username=f"testuser_{unique_id}",
        hashed_password=hashed_password,
        role="user",
        is_active=True
    )
    db.add(user)
    db.commit()
    db.refresh(user)
    return user


@pytest.fixture
def test_admin(db, auth_manager):
    """Create a test admin user with unique username"""
    unique_id = str(uuid.uuid4())[:8]  # Short unique identifier
    hashed_password = auth_manager.hash_password("adminpass123")
    admin = User(
        email=f"admin_{unique_id}@example.com",
        username=f"admin_{unique_id}",
        hashed_password=hashed_password,
        role="admin",
        is_active=True
    )
    db.add(admin)
    db.commit()
    db.refresh(admin)
    return admin


@pytest.fixture
def auth_headers(client, test_user):
    """Get authentication headers for test user"""
    response = client.post("/api/v1/auth/login", json={
        "username": test_user.username,
        "password": "testpass123"
    })
    assert response.status_code == 200, f"Login failed: {response.text}"
    token = response.json()["access_token"]
    return {"Authorization": f"Bearer {token}"}


@pytest.fixture
def admin_headers(client, test_admin):
    """Get authentication headers for admin user"""
    response = client.post("/api/v1/auth/login", json={
        "username": test_admin.username,
        "password": "adminpass123"
    })
    assert response.status_code == 200, f"Admin login failed: {response.text}"
    token = response.json()["access_token"]
    return {"Authorization": f"Bearer {token}"}


@pytest.fixture
def test_product(db):
    """Create a test product"""
    product = Product(
        product_id="TEST001",
        title="Test Product",
        description="A test product",
        price="10.99",
        currency="EUR",
        brand="TestBrand",
        gtin="1234567890123",
        availability="in stock",
        marketplace="Letzshop",
        shop_name="TestShop"
    )
    db.add(product)
    db.commit()
    db.refresh(product)
    return product


@pytest.fixture
def test_shop(db, test_user):
    """Create a test shop with unique shop code"""
    unique_id = str(uuid.uuid4())[:8]  # Short unique identifier
    shop = Shop(
        shop_code=f"TESTSHOP_{unique_id}",
        shop_name=f"Test Shop {unique_id}",
        owner_id=test_user.id,
        is_active=True,
        is_verified=True
    )
    db.add(shop)
    db.commit()
    db.refresh(shop)
    return shop


@pytest.fixture
def test_stock(db, test_product, test_shop):
    """Create test stock entry"""
    unique_id = str(uuid.uuid4())[:8].upper()  # Short unique identifier
    stock = Stock(
        gtin=test_product.gtin,  # Fixed: use gtin instead of product_id
        location=f"WAREHOUSE_A_{unique_id}",
        quantity=10,
        reserved_quantity=0,
        shop_id=test_shop.id  # Add shop_id reference
    )
    db.add(stock)
    db.commit()
    db.refresh(stock)
    return stock


@pytest.fixture
def test_marketplace_job(db, test_shop, test_user):  # Add test_shop dependency
    """Create a test marketplace import job"""
    job = MarketplaceImportJob(
        marketplace="amazon",
        shop_name="Test Import Shop",
        status="completed",
        source_url="https://test-marketplace.example.com/import",
        shop_id=test_shop.id,  # Add required shop_id
        user_id=test_user.id,
        imported_count=5,
        updated_count=3,
        total_processed=8,
        error_count=0,
        error_message=None
    )
    db.add(job)
    db.commit()
    db.refresh(job)
    return job


def create_test_import_job(db, shop_id, **kwargs):  # Add shop_id parameter
    """Helper function to create MarketplaceImportJob with defaults"""
    defaults = {
        'marketplace': 'test',
        'shop_name': 'Test Shop',
        'status': 'pending',
        'source_url': 'https://test.example.com/import',
        'shop_id': shop_id,  # Add required shop_id
        'imported_count': 0,
        'updated_count': 0,
        'total_processed': 0,
        'error_count': 0,
        'error_message': None
    }
    defaults.update(kwargs)

    job = MarketplaceImportJob(**defaults)
    db.add(job)
    db.commit()
    db.refresh(job)
    return job


# Cleanup fixture to ensure clean state
@pytest.fixture(autouse=True)
def cleanup():
    """Automatically clean up after each test"""
    yield
    # Clear any remaining dependency overrides
    app.dependency_overrides.clear()


# Add these fixtures to your existing conftest.py

@pytest.fixture
def unique_product(db):
    """Create a unique product for tests that need isolated product data"""
    unique_id = str(uuid.uuid4())[:8]
    product = Product(
        product_id=f"UNIQUE_{unique_id}",
        title=f"Unique Product {unique_id}",
        description=f"A unique test product {unique_id}",
        price="19.99",
        currency="EUR",
        brand=f"UniqueBrand_{unique_id}",
        gtin=f"123456789{unique_id[:4]}",
        availability="in stock",
        marketplace="Letzshop",
        shop_name=f"UniqueShop_{unique_id}",
        google_product_category=f"UniqueCategory_{unique_id}"
    )
    db.add(product)
    db.commit()
    db.refresh(product)
    return product


@pytest.fixture
def unique_shop(db, test_user):
    """Create a unique shop for tests that need isolated shop data"""
    unique_id = str(uuid.uuid4())[:8]
    shop = Shop(
        shop_code=f"UNIQUESHOP_{unique_id}",
        shop_name=f"Unique Test Shop {unique_id}",
        description=f"A unique test shop {unique_id}",
        owner_id=test_user.id,
        is_active=True,
        is_verified=True
    )
    db.add(shop)
    db.commit()
    db.refresh(shop)
    return shop


@pytest.fixture
def other_user(db, auth_manager):
    """Create a different user for testing access controls"""
    unique_id = str(uuid.uuid4())[:8]
    hashed_password = auth_manager.hash_password("otherpass123")
    user = User(
        email=f"other_{unique_id}@example.com",
        username=f"otheruser_{unique_id}",
        hashed_password=hashed_password,
        role="user",
        is_active=True
    )
    db.add(user)
    db.commit()
    db.refresh(user)
    return user


@pytest.fixture
def inactive_shop(db, other_user):
    """Create an inactive shop owned by other_user"""
    unique_id = str(uuid.uuid4())[:8]
    shop = Shop(
        shop_code=f"INACTIVE_{unique_id}",
        shop_name=f"Inactive Shop {unique_id}",
        owner_id=other_user.id,
        is_active=False,
        is_verified=False
    )
    db.add(shop)
    db.commit()
    db.refresh(shop)
    return shop


@pytest.fixture
def verified_shop(db, other_user):
    """Create a verified shop owned by other_user"""
    unique_id = str(uuid.uuid4())[:8]
    shop = Shop(
        shop_code=f"VERIFIED_{unique_id}",
        shop_name=f"Verified Shop {unique_id}",
        owner_id=other_user.id,
        is_active=True,
        is_verified=True
    )
    db.add(shop)
    db.commit()
    db.refresh(shop)
    return shop


@pytest.fixture
def shop_product(db, test_shop, unique_product):
    """Create a shop product relationship"""
    shop_product = ShopProduct(
        shop_id=test_shop.id,
        product_id=unique_product.id,
        is_active=True
    )
    # Add optional fields if they exist in your model
    if hasattr(ShopProduct, 'price'):
        shop_product.price = "24.99"
    if hasattr(ShopProduct, 'is_featured'):
        shop_product.is_featured = False
    if hasattr(ShopProduct, 'stock_quantity'):
        shop_product.stock_quantity = 10

    db.add(shop_product)
    db.commit()
    db.refresh(shop_product)
    return shop_product


@pytest.fixture
def multiple_products(db):
    """Create multiple products for testing statistics and pagination"""
    unique_id = str(uuid.uuid4())[:8]
    products = []

    for i in range(5):
        product = Product(
            product_id=f"MULTI_{unique_id}_{i}",
            title=f"Multi Product {i} {unique_id}",
            description=f"Multi test product {i}",
            price=f"{10 + i}.99",
            currency="EUR",
            brand=f"MultiBrand_{i % 3}",  # Create 3 different brands
            marketplace=f"MultiMarket_{i % 2}",  # Create 2 different marketplaces
            shop_name=f"MultiShop_{i}",
            google_product_category=f"MultiCategory_{i % 2}",  # Create 2 different categories
            gtin=f"1234567890{i}{unique_id[:2]}"
        )
        products.append(product)

    db.add_all(products)
    db.commit()
    for product in products:
        db.refresh(product)
    return products


@pytest.fixture
def multiple_stocks(db, multiple_products, test_shop):
    """Create multiple stock entries for testing"""
    stocks = []

    for i, product in enumerate(multiple_products):
        stock = Stock(
            gtin=product.gtin,
            location=f"LOC_{i}",
            quantity=10 + (i * 5),  # Different quantities
            reserved_quantity=i,
            shop_id=test_shop.id
        )
        stocks.append(stock)

    db.add_all(stocks)
    db.commit()
    for stock in stocks:
        db.refresh(stock)
    return stocks


# Helper fixture factory functions
def create_unique_product_factory():
    """Factory function to create unique products in tests"""

    def _create_product(db, **kwargs):
        unique_id = str(uuid.uuid4())[:8]
        defaults = {
            'product_id': f"FACTORY_{unique_id}",
            'title': f"Factory Product {unique_id}",
            'price': "15.99",
            'currency': "EUR",
            'marketplace': "TestMarket",
            'shop_name': "TestShop"
        }
        defaults.update(kwargs)

        product = Product(**defaults)
        db.add(product)
        db.commit()
        db.refresh(product)
        return product

    return _create_product


@pytest.fixture
def product_factory():
    """Fixture that provides a product factory function"""
    return create_unique_product_factory()


def create_unique_shop_factory():
    """Factory function to create unique shops in tests"""

    def _create_shop(db, owner_id, **kwargs):
        unique_id = str(uuid.uuid4())[:8]
        defaults = {
            'shop_code': f"FACTORY_{unique_id}",
            'shop_name': f"Factory Shop {unique_id}",
            'owner_id': owner_id,
            'is_active': True,
            'is_verified': False
        }
        defaults.update(kwargs)

        shop = Shop(**defaults)
        db.add(shop)
        db.commit()
        db.refresh(shop)
        return shop

    return _create_shop


@pytest.fixture
def shop_factory():
    """Fixture that provides a shop factory function"""
    return create_unique_shop_factory()