const ROOM_TYPES = {
    economy: { id: 'Эконом', name: 'Эконом', pricePerGuest: 2500 },
    standard: { id: 'Стандарт', name: 'Стандарт', pricePerGuest: 4000 },
    vip: { id: 'VIP Люкс', name: 'VIP Люкс', pricePerGuest: 8000 }
};

const BOOKING_STATUSES = {
    NEW: 'новая',
    PAID: 'оплачена',
    RESERVED: 'зарезервирована',
    CHECKED_IN: 'заселена',
    CHECKED_OUT: 'выехала',
    CANCELLED: 'отменена'
};

const DEFAULT_ROOMS = [
    { type: ROOM_TYPES.economy.id, name: 'Эконом 1', description: 'Бюджетный номер', rooms_count: 3, single_beds: 2, double_beds: 0, has_sofa: 0, has_ac: 0, has_wifi: 1, has_shower: 1, max_guests: 2, price_per_guest: ROOM_TYPES.economy.pricePerGuest },
    { type: ROOM_TYPES.standard.id, name: 'Стандарт 1', description: 'Комфортный номер', rooms_count: 2, single_beds: 0, double_beds: 1, has_sofa: 1, has_ac: 1, has_wifi: 1, has_shower: 1, max_guests: 3, price_per_guest: ROOM_TYPES.standard.pricePerGuest },
    { type: ROOM_TYPES.vip.id, name: 'VIP Люкс 1', description: 'Премиум номер', rooms_count: 1, single_beds: 0, double_beds: 1, has_sofa: 1, has_ac: 1, has_wifi: 1, has_shower: 1, max_guests: 4, price_per_guest: ROOM_TYPES.vip.pricePerGuest }
];

const ROOM_PRICES = {
    [ROOM_TYPES.economy.id]: ROOM_TYPES.economy.pricePerGuest,
    [ROOM_TYPES.standard.id]: ROOM_TYPES.standard.pricePerGuest,
    [ROOM_TYPES.vip.id]: ROOM_TYPES.vip.pricePerGuest
};

const STATUS_LIST = [
    BOOKING_STATUSES.NEW,
    BOOKING_STATUSES.PAID,
    BOOKING_STATUSES.RESERVED,
    BOOKING_STATUSES.CHECKED_IN,
    BOOKING_STATUSES.CHECKED_OUT,
    BOOKING_STATUSES.CANCELLED
];

const ROOM_TYPE_LIST = [
    ROOM_TYPES.economy.id,
    ROOM_TYPES.standard.id,
    ROOM_TYPES.vip.id
];

function getRoomPrice(roomType) {
    return ROOM_PRICES[roomType] || 0;
}

function calculateNights(checkin, checkout) {
    const ci = new Date(checkin);
    const co = new Date(checkout);
    return Math.ceil((co - ci) / (1000 * 60 * 60 * 24));
}

function calculateBasePrice(roomType, checkin, checkout) {
    const pricePerNight = getRoomPrice(roomType);
    const nights = calculateNights(checkin, checkout);
    return pricePerNight * nights;
}

module.exports = {
    ROOM_TYPES,
    BOOKING_STATUSES,
    DEFAULT_ROOMS,
    ROOM_PRICES,
    STATUS_LIST,
    ROOM_TYPE_LIST,
    getRoomPrice,
    calculateNights,
    calculateBasePrice
};