-- ============================================================
-- Модуль питания: категории, блюда, счета, заказы
-- ============================================================
SET NAMES utf8mb4;

-- ---------- Компания-оператор питания ----------
CREATE TABLE IF NOT EXISTS food_companies (
    id         INT AUTO_INCREMENT PRIMARY KEY,
    name       VARCHAR(255) NOT NULL,
    is_active  TINYINT(1)   NOT NULL DEFAULT 1
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ---------- Категории (Горячее, Напитки, Закуски, Суп...) ----------
CREATE TABLE IF NOT EXISTS food_categories (
    id         INT AUTO_INCREMENT PRIMARY KEY,
    name       VARCHAR(100) NOT NULL,
    emoji      VARCHAR(16)  DEFAULT NULL,
    sort_order INT          NOT NULL DEFAULT 0,
    is_active  TINYINT(1)   NOT NULL DEFAULT 1
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ---------- Блюда ----------
CREATE TABLE IF NOT EXISTS food_items (
    id           INT AUTO_INCREMENT PRIMARY KEY,
    category_id  INT           NOT NULL,
    name         VARCHAR(255)  NOT NULL,
    description  VARCHAR(500)  DEFAULT NULL,
    price        DECIMAL(10,2) NOT NULL DEFAULT 0,
    image_url    VARCHAR(500)  DEFAULT NULL,
    weight_grams INT           DEFAULT NULL,
    is_active    TINYINT(1)    NOT NULL DEFAULT 1,
    sort_order   INT           NOT NULL DEFAULT 0,
    KEY idx_food_items_cat (category_id),
    CONSTRAINT fk_item_cat FOREIGN KEY (category_id)
        REFERENCES food_categories(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ---------- Счета питания сотрудников (по табельному) ----------
CREATE TABLE IF NOT EXISTS food_accounts (
    id          INT AUTO_INCREMENT PRIMARY KEY,
    tnom        VARCHAR(20) NOT NULL UNIQUE,
    balance     DECIMAL(10,2) NOT NULL DEFAULT 0,
    updated_at  TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
                                  ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ---------- Заказы ----------
CREATE TABLE IF NOT EXISTS food_orders (
    id             INT AUTO_INCREMENT PRIMARY KEY,
    tnom           VARCHAR(20)  NOT NULL,
    total_amount   DECIMAL(10,2) NOT NULL,
    status         ENUM('new','accepted','done','cancelled')
                    NOT NULL DEFAULT 'new',
    created_at     TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at     TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP
                                  ON UPDATE CURRENT_TIMESTAMP,
    KEY idx_food_orders_status (status),
    KEY idx_food_orders_tnom   (tnom),
    KEY idx_food_orders_date   (created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- ---------- Позиции заказа ----------
CREATE TABLE IF NOT EXISTS food_order_items (
    id          INT AUTO_INCREMENT PRIMARY KEY,
    order_id    INT           NOT NULL,
    item_id     INT           NOT NULL,
    item_name   VARCHAR(255)  NOT NULL,  -- фиксируем имя на момент заказа
    unit_price  DECIMAL(10,2) NOT NULL,  -- и цену
    quantity    INT           NOT NULL,
    subtotal    DECIMAL(10,2) NOT NULL,
    KEY idx_order_items_order (order_id),
    KEY idx_order_items_item  (item_id),
    CONSTRAINT fk_oi_order FOREIGN KEY (order_id)
        REFERENCES food_orders(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;