CREATE TABLE products (
    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    category_id BIGINT UNSIGNED NOT NULL,
    code VARCHAR(30) NOT NULL UNIQUE,
    name VARCHAR(150) NOT NULL,
    product_group VARCHAR(100) NULL,
    available_qty INT NOT NULL DEFAULT 0,
    price DECIMAL(10,2) NOT NULL,
    min_order_qty INT NOT NULL DEFAULT 1,
    is_active TINYINT(1) NOT NULL DEFAULT 1,
    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    CONSTRAINT fk_products_category FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE INDEX idx_products_category ON products (category_id);
CREATE INDEX idx_products_active ON products (is_active);