-- Initial Schema for Stock Management App

CREATE TABLE IF NOT EXISTS `products` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `name` VARCHAR(255) NOT NULL,
  `type` ENUM('jant', 'lastik', 'akü') NOT NULL,
  `stock_quantity` INT NOT NULL DEFAULT 0,
  `purchase_price` DECIMAL(10, 2) NOT NULL,
  `sale_price` DECIMAL(10, 2) NOT NULL,
  `low_stock_threshold` INT NOT NULL DEFAULT 5,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE IF NOT EXISTS `sales` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `total_amount` DECIMAL(10, 2) NOT NULL,
  `profit_amount` DECIMAL(10, 2) NOT NULL,
  `payment_method` VARCHAR(50) DEFAULT 'nakit',
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE IF NOT EXISTS `sale_items` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `sale_id` INT NOT NULL,
  `product_id` INT NOT NULL,
  `quantity` INT NOT NULL,
  `unit_price` DECIMAL(10, 2) NOT NULL,
  `total_price` DECIMAL(10, 2) NOT NULL,
  FOREIGN KEY (`sale_id`) REFERENCES `sales`(`id`) ON DELETE CASCADE,
  FOREIGN KEY (`product_id`) REFERENCES `products`(`id`) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;