-- Триггеры для базы данных интернет-магазина
-- PostgreSQL
-- 
-- ВАЖНО: Этот файл должен выполняться ПОСЛЕ schema.sql
-- Сначала создайте структуру базы данных (schema.sql), затем создайте триггеры (triggers.sql)
-- Функции должны быть созданы в schema.sql перед выполнением этого файла

-- Триггеры для автоматического обновления updated_at
DROP TRIGGER IF EXISTS update_resources_updated_at ON resources;
CREATE TRIGGER update_resources_updated_at BEFORE UPDATE ON resources
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_actions_updated_at ON actions;
CREATE TRIGGER update_actions_updated_at BEFORE UPDATE ON actions
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_permissions_updated_at ON permissions;
CREATE TRIGGER update_permissions_updated_at BEFORE UPDATE ON permissions
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_roles_updated_at ON roles;
CREATE TRIGGER update_roles_updated_at BEFORE UPDATE ON roles
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_users_updated_at ON users;
CREATE TRIGGER update_users_updated_at BEFORE UPDATE ON users
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_categories_updated_at ON categories;
CREATE TRIGGER update_categories_updated_at BEFORE UPDATE ON categories
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_order_statuses_updated_at ON order_statuses;
CREATE TRIGGER update_order_statuses_updated_at BEFORE UPDATE ON order_statuses
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_payment_methods_updated_at ON payment_methods;
CREATE TRIGGER update_payment_methods_updated_at BEFORE UPDATE ON payment_methods
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_payment_statuses_updated_at ON payment_statuses;
CREATE TRIGGER update_payment_statuses_updated_at BEFORE UPDATE ON payment_statuses
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_products_updated_at ON products;
CREATE TRIGGER update_products_updated_at BEFORE UPDATE ON products
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_addresses_updated_at ON addresses;
CREATE TRIGGER update_addresses_updated_at BEFORE UPDATE ON addresses
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_orders_updated_at ON orders;
CREATE TRIGGER update_orders_updated_at BEFORE UPDATE ON orders
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_cart_items_updated_at ON cart_items;
CREATE TRIGGER update_cart_items_updated_at BEFORE UPDATE ON cart_items
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_reviews_updated_at ON reviews;
CREATE TRIGGER update_reviews_updated_at BEFORE UPDATE ON reviews
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

DROP TRIGGER IF EXISTS update_payments_updated_at ON payments;
CREATE TRIGGER update_payments_updated_at BEFORE UPDATE ON payments
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- Триггеры для обновления рейтинга товара
DROP TRIGGER IF EXISTS update_product_rating_on_review_insert ON reviews;
CREATE TRIGGER update_product_rating_on_review_insert
    AFTER INSERT ON reviews
    FOR EACH ROW
    WHEN (NEW.is_approved = TRUE)
    EXECUTE FUNCTION update_product_rating();

DROP TRIGGER IF EXISTS update_product_rating_on_review_update ON reviews;
CREATE TRIGGER update_product_rating_on_review_update
    AFTER UPDATE ON reviews
    FOR EACH ROW
    WHEN (NEW.is_approved != OLD.is_approved OR NEW.rating != OLD.rating)
    EXECUTE FUNCTION update_product_rating();

DROP TRIGGER IF EXISTS update_product_rating_on_review_delete ON reviews;
CREATE TRIGGER update_product_rating_on_review_delete
    AFTER DELETE ON reviews
    FOR EACH ROW
    EXECUTE FUNCTION update_product_rating();

-- Триггер для автоматической генерации номера заказа
DROP TRIGGER IF EXISTS generate_order_number_trigger ON orders;
CREATE TRIGGER generate_order_number_trigger
    BEFORE INSERT ON orders
    FOR EACH ROW
    EXECUTE FUNCTION generate_order_number();