CREATE TABLE IF NOT EXISTS users (
    email TEXT PRIMARY KEY,
    username TEXT UNIQUE,
    full_name TEXT NOT NULL,
    phone TEXT,
    citizen_id TEXT,
    mauth_token TEXT,
    role TEXT DEFAULT 'visitor' CHECK(role IN ('customer', 'restaurant', 'delivery_agent', 'visitor')),
    is_banned INTEGER DEFAULT 0,
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP
);
CREATE TABLE IF NOT EXISTS restaurants (
    id TEXT PRIMARY KEY,
    owner_email TEXT NOT NULL,
    name TEXT NOT NULL,
    description TEXT,
    address TEXT NOT NULL,
    latitude REAL NOT NULL,
    longitude REAL NOT NULL,
    image_url TEXT,
    status TEXT NOT NULL DEFAULT 'active' CHECK(status IN ('active', 'closed')),
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (owner_email) REFERENCES users(email) ON DELETE CASCADE
);
CREATE TABLE IF NOT EXISTS delivery_agents (
    user_email TEXT PRIMARY KEY,
    vehicle_type TEXT,
    is_available INTEGER NOT NULL DEFAULT 1,
    current_latitude REAL,
    current_longitude REAL,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_email) REFERENCES users(email) ON DELETE CASCADE
);
CREATE TABLE IF NOT EXISTS menu_items (
    id TEXT PRIMARY KEY,
    restaurant_id TEXT NOT NULL,
    name TEXT NOT NULL,
    description TEXT,
    category TEXT,
    ingredients TEXT,
    recipe TEXT,
    price REAL NOT NULL,
    image_url TEXT,
    is_available INTEGER NOT NULL DEFAULT 1,
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (restaurant_id) REFERENCES restaurants(id) ON DELETE CASCADE
);
CREATE TABLE IF NOT EXISTS orders (
    id TEXT PRIMARY KEY,
    customer_email TEXT NOT NULL,
    restaurant_id TEXT NOT NULL,
    delivery_agent_email TEXT,
    delivery_address TEXT NOT NULL,
    delivery_latitude REAL NOT NULL,
    delivery_longitude REAL NOT NULL,
    subtotal REAL NOT NULL,
    delivery_fee REAL NOT NULL,
    total_amount REAL NOT NULL,
    status TEXT NOT NULL DEFAULT 'placed' CHECK(status IN ('placed', 'accepted', 'preparing', 'ready_for_pickup', 'assigned', 'picked_up', 'delivered', 'cancelled')),
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    updated_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (customer_email) REFERENCES users(email),
    FOREIGN KEY (restaurant_id) REFERENCES restaurants(id),
    FOREIGN KEY (delivery_agent_email) REFERENCES users(email)
);
CREATE TABLE IF NOT EXISTS order_items (
    id TEXT PRIMARY KEY,
    order_id TEXT NOT NULL,
    menu_item_id TEXT NOT NULL,
    item_name TEXT NOT NULL,
    quantity INTEGER NOT NULL,
    unit_price REAL NOT NULL,
    special_instructions TEXT,
    FOREIGN KEY (order_id) REFERENCES orders(id) ON DELETE CASCADE,
    FOREIGN KEY (menu_item_id) REFERENCES menu_items(id)
);
CREATE TABLE IF NOT EXISTS ratings (
    id TEXT PRIMARY KEY,
    order_id TEXT NOT NULL,
    customer_email TEXT NOT NULL,
    restaurant_rating INTEGER NOT NULL CHECK(restaurant_rating BETWEEN 1 AND 5),
    driver_rating INTEGER CHECK(driver_rating BETWEEN 1 AND 5),
    comment TEXT,
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (order_id) REFERENCES orders(id),
    FOREIGN KEY (customer_email) REFERENCES users(email)
);
CREATE TABLE IF NOT EXISTS notifications (
    id TEXT PRIMARY KEY,
    recipient_email TEXT NOT NULL,
    type TEXT NOT NULL DEFAULT 'info' CHECK(type IN ('info', 'success', 'warning', 'mention', 'system')),
    title TEXT NOT NULL,
    body TEXT,
    link TEXT,
    actor_email TEXT,
    is_read INTEGER NOT NULL DEFAULT 0,
    created_at TEXT DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (recipient_email) REFERENCES users(email) ON DELETE CASCADE,
    FOREIGN KEY (actor_email) REFERENCES users(email)
);
CREATE INDEX IF NOT EXISTS idx_users_username ON users(username);
CREATE INDEX IF NOT EXISTS idx_restaurants_owner ON restaurants(owner_email);
CREATE INDEX IF NOT EXISTS idx_menu_items_restaurant ON menu_items(restaurant_id);
CREATE INDEX IF NOT EXISTS idx_orders_customer ON orders(customer_email);
CREATE INDEX IF NOT EXISTS idx_orders_restaurant ON orders(restaurant_id);
CREATE INDEX IF NOT EXISTS idx_orders_delivery_agent ON orders(delivery_agent_email);
CREATE INDEX IF NOT EXISTS idx_order_items_order ON order_items(order_id);
CREATE INDEX IF NOT EXISTS idx_order_items_menu_item ON order_items(menu_item_id);
CREATE INDEX IF NOT EXISTS idx_ratings_order ON ratings(order_id);
CREATE INDEX IF NOT EXISTS idx_ratings_customer ON ratings(customer_email);
CREATE INDEX IF NOT EXISTS idx_notifications_recipient ON notifications(recipient_email, is_read, created_at);
CREATE UNIQUE INDEX IF NOT EXISTS idx_users_email ON users(email);