import type { DeliveryInquiryDetails, InquiryPreferredDate, PickupInquiryDetails } from '@/domain/cart/inquiry';
import { hasInquirySchedule, isInquiryBranchOnlineEnabled } from '@/domain/cart/inquiry';
import type { BookingDetails } from '@/domain/booking/entities';
import { isBookingComplete } from '@/domain/booking/validation';
import type { Language } from '@/domain/language/entities';
import { localizeOrderLineName } from '@/application/i18n/menu-localization';
import {
  calculateOrderTotal,
  formatOrderLinesForInquiry,
  formatOrderLinesForMessage,
  type OrderLine,
} from '@/domain/shared/order-line';
import { PICKUP_LEAD_TIME_MINUTES } from '@/domain/shared/constants';

export interface CartInquiryCopy {
  pickupIntro: string;
  deliveryIntro: string;
  messageTotal: string;
  messageName: string;
  messageEmail: string;
  messageBranch: string;
  branchAskim: string;
  branchBackaplan: string;
  messageAddress: string;
  messagePreferredDate: string;
  messagePreferredTime: string;
  scheduleDateToday: string;
  scheduleDateTomorrow: string;
  deliverySwishNote: string;
}

/** @deprecated Legacy cart copy — kept for any remaining references */
export interface CartDrawerCopy {
  messageHello: string;
  messageIntro: string;
  messageAddress: string;
  messageConfirm: string;
  messageTotal: string;
  messageThanks: string;
}

export interface BookingLocationCopy {
  askim: string;
  backaplan: string;
}

export interface BookingMessageCopy extends BookingLocationCopy {
  modeTable: string;
  modeEvent: string;
  eventLine: string;
  greeting: string;
  labelName: string;
  labelPhone: string;
  labelEmail: string;
  labelLocation: string;
  labelDate: string;
  labelTime: string;
  labelGuests: string;
  labelNotes: string;
  labelPreOrder: string;
  preOrderNone: string;
  preOrderTotal: string;
  confirmLine: string;
  thanksLine: string;
}

export function getSuggestedPickupTime(language: Language, from: Date = new Date()): string {
  const suggested = new Date(from.getTime() + PICKUP_LEAD_TIME_MINUTES * 60 * 1000);
  const timeLocale =
    language === 'sv' ? 'sv-SE' :
    language === 'ar' ? 'ar-SA' :
    language === 'tr' ? 'tr-TR' :
    'en-GB';
  return suggested.toLocaleTimeString(timeLocale, { hour: '2-digit', minute: '2-digit' });
}

function localizeInquiryLines(lang: Language, items: OrderLine[]): string {
  return formatOrderLinesForInquiry(
    items.map((item) => ({ ...item, name: localizeOrderLineName(lang, item) })),
  );
}

function resolveInquiryBranchLabel(
  branch: PickupInquiryDetails['branch'],
  copy: CartInquiryCopy,
): string {
  return branch === 'askim' ? copy.branchAskim : copy.branchBackaplan;
}

function resolveInquiryDateLabel(
  date: InquiryPreferredDate,
  copy: CartInquiryCopy,
): string {
  return date === 'tomorrow' ? copy.scheduleDateTomorrow : copy.scheduleDateToday;
}

function formatInquiryScheduleLine(details: PickupInquiryDetails, copy: CartInquiryCopy): string {
  if (!hasInquirySchedule(details)) return '';

  return `${copy.messagePreferredDate}: ${resolveInquiryDateLabel(details.preferredDate, copy)}
${copy.messagePreferredTime}: ${details.preferredTime.trim()}`;
}

export function buildPickupInquiryMessage(
  items: OrderLine[],
  details: PickupInquiryDetails,
  copy: CartInquiryCopy,
  language: Language = 'sv',
): string | null {
  if (items.length === 0 || !isInquiryBranchOnlineEnabled(details.branch)) return null;

  const lines = localizeInquiryLines(language, items);
  const total = calculateOrderTotal(items);

  const scheduleLine = formatInquiryScheduleLine(details, copy);

  return `${copy.pickupIntro}
${lines}
${copy.messageTotal}: ${total} kr
${copy.messageBranch}: ${resolveInquiryBranchLabel(details.branch, copy)}
${copy.messageName}: ${details.name.trim()}
${copy.messageEmail}: ${details.email.trim()}${scheduleLine ? `\n${scheduleLine}` : ''}`;
}

export function buildDeliveryInquiryMessage(
  items: OrderLine[],
  details: DeliveryInquiryDetails,
  copy: CartInquiryCopy,
  language: Language = 'sv',
): string | null {
  if (items.length === 0 || !isInquiryBranchOnlineEnabled(details.branch)) return null;

  const lines = localizeInquiryLines(language, items);
  const total = calculateOrderTotal(items);

  const scheduleLine = formatInquiryScheduleLine(details, copy);
  const addressLine = details.address.trim()
    ? `${copy.messageAddress}: ${details.address.trim()}\n`
    : '';

  return `${copy.deliveryIntro}
${lines}
${copy.messageTotal}: ${total} kr
${copy.messageBranch}: ${resolveInquiryBranchLabel(details.branch, copy)}
${copy.messageName}: ${details.name.trim()}
${copy.messageEmail}: ${details.email.trim()}
${addressLine}${scheduleLine ? `${scheduleLine}\n` : ''}${copy.deliverySwishNote}`;
}

const PACKAGE_NAME_PLACEHOLDER = '{{package}}';

export function buildCateringPackagePricingMessage(
  packageName: string,
  template: string,
): string {
  return template.split(PACKAGE_NAME_PLACEHOLDER).join(packageName);
}

function resolveBookingEventLabel(booking: BookingDetails, eventLabel: string): string {
  if (booking.bookingMode !== 'event' || !booking.eventType) return '';
  if (booking.eventType === 'other') {
    return booking.eventTypeOther.trim() || eventLabel;
  }
  return eventLabel;
}

export function buildBookingWhatsAppMessage(
  booking: BookingDetails,
  preOrder: OrderLine[],
  copy: BookingMessageCopy,
  eventLabel = '',
  language: Language = 'sv',
): string | null {
  if (!isBookingComplete(booking)) return null;

  const locationLabel =
    booking.location === 'askim' ? copy.askim : copy.backaplan;
  const bookingModeLabel =
    booking.bookingMode === 'event' ? copy.modeEvent : copy.modeTable;
  const occasionLine = resolveBookingEventLabel(booking, eventLabel);
  const occasionText = occasionLine ? `\n${copy.eventLine}: ${occasionLine}` : '';

  const itemsText =
    preOrder.length > 0
      ? localizeInquiryLines(language, preOrder)
      : copy.preOrderNone;

  const totalText =
    preOrder.length > 0 ? `\n${copy.preOrderTotal}: ${calculateOrderTotal(preOrder)} kr\n` : '';

  return `${copy.greeting}

${bookingModeLabel}:

${copy.labelName}: ${booking.name}
${copy.labelPhone}: ${booking.phone}
${copy.labelEmail}: ${booking.email || 'N/A'}
${copy.labelLocation}: ${locationLabel}
${copy.labelDate}: ${booking.date}
${copy.labelTime}: ${booking.time}
${copy.labelGuests}: ${booking.guests}${occasionText}
${copy.labelNotes}: ${booking.notes || copy.preOrderNone}

${copy.labelPreOrder}:
${itemsText}${totalText}
${copy.confirmLine}

${copy.thanksLine}`;
}