import { CATALOG, CATEGORY_CODES, DEFAULT_CATEGORY_DISCOUNTS, DEFAULT_SETTINGS, fromPrice, YEREVAN_DISTRICTS, type CategoryCode, type ParamsSchema, type Pricing, type SlotConfig } from '@barev/core';

export interface LandingCatalog {
  categories: { code: CategoryCode; barevPlusDiscountPct: number; services: { code: string; fromPrice: number; active: boolean }[] }[];
  barevPlus: { monthlyPrice: number; giftDays: number };
  /** цены и скидки главной из настроек (админка → Настройки) */
  offer: LandingOffer;
  agency: { commissionPct: number; attributionMonths: number };
  botUsername: string;
}

export interface LandingOffer {
  plusMaxPct: number;
  elitePrice: number;
  eliteMaxPct: number;
  hotelWithPlus: number;
  hotelBase: number;
  consultation: number;
  docsFrom: number;
  /** страницы услуг: /social-card, /residence-permit, /airport */
  socialCard: number;
  residenceEscortFrom: number;
  residenceStateFee: number;
  transferStandard: number;
  transferPremium: number;
}

/** Ключи настроек → поля для лендинга; то же отдаёт public.catalog */
export function offerFromSettings(s: typeof DEFAULT_SETTINGS): LandingOffer {
  return {
    plusMaxPct: s['barevPlus.maxDiscountPct'],
    elitePrice: s['elite.monthlyPrice'],
    eliteMaxPct: s['elite.maxDiscountPct'],
    hotelWithPlus: s['relocation.hotelWithPlus'],
    hotelBase: s['relocation.hotelBase'],
    consultation: s['relocation.consultation'],
    docsFrom: s['docs.fromPrice'],
    socialCard: s['docs.socialCardPrice'],
    residenceEscortFrom: s['residence.escortFrom'],
    residenceStateFee: s['residence.stateFee'],
    transferStandard: s['transfer.standardPrice'],
    transferPremium: s['transfer.premiumPrice'],
  };
}

const API = process.env.API_URL ?? 'http://localhost:4000';

/** Запасной вариант, если API недоступно при сборке: цены-заглушки из каталога */
function fallback(): LandingCatalog {
  return {
    categories: CATEGORY_CODES.map((code) => ({
      code,
      barevPlusDiscountPct: DEFAULT_CATEGORY_DISCOUNTS[code],
      services: CATALOG.filter((s) => s.category === code).map((s) => ({ code: s.code, fromPrice: fromPrice(s.pricing), active: s.stage === 1 })),
    })),
    barevPlus: { monthlyPrice: DEFAULT_SETTINGS['barevPlus.monthlyPrice'], giftDays: DEFAULT_SETTINGS['barevPlus.giftDays'] },
    offer: offerFromSettings(DEFAULT_SETTINGS),
    agency: { commissionPct: DEFAULT_SETTINGS['agency.defaultCommissionPct'], attributionMonths: DEFAULT_SETTINGS['agency.attributionMonths'] },
    botUsername: process.env.CLIENT_BOT_USERNAME ?? 'barev_club_bot',
  };
}

/** LND-5: цены и состав услуг — из справочника (ISR, обновление раз в 5 минут) */
export async function getCatalog(): Promise<LandingCatalog> {
  try {
    const res = await fetch(`${API}/trpc/public.catalog`, { next: { revalidate: 300 } });
    if (!res.ok) throw new Error(String(res.status));
    const body = (await res.json()) as { result: { data: { json: LandingCatalog } } };
    // старое API без offer или без новых полей — значения по умолчанию
    return { ...body.result.data.json, offer: { ...offerFromSettings(DEFAULT_SETTINGS), ...body.result.data.json.offer } };
  } catch {
    return fallback();
  }
}

export interface CleaningConfig {
  active: boolean;
  pricing: Pricing;
  paramsSchema: ParamsSchema;
  slotConfig: SlotConfig;
  categoryDiscountPct: number;
  districts: string[];
  botUsername: string;
}

/** Страница /clean: правила цены из справочника (ISR); без API — значения из каталога в коде */
export async function getCleaning(): Promise<CleaningConfig> {
  try {
    const res = await fetch(`${API}/trpc/public.cleaning`, { next: { revalidate: 300 } });
    if (!res.ok) throw new Error(String(res.status));
    const body = (await res.json()) as { result: { data: { json: CleaningConfig } } };
    return body.result.data.json;
  } catch {
    const s = CATALOG.find((c) => c.code === 'cleaning')!;
    return {
      active: true,
      pricing: s.pricing,
      paramsSchema: s.paramsSchema,
      slotConfig: s.slotConfig,
      categoryDiscountPct: DEFAULT_CATEGORY_DISCOUNTS.HOME,
      districts: [...YEREVAN_DISTRICTS],
      botUsername: process.env.CLIENT_BOT_USERNAME ?? 'barev_club_bot',
    };
  }
}