import { useCallback, useContext, useState } from 'react';
import SettingsContext from './settings-context';
import { buildTideClientConfig } from '../shared/utils/tide-api-utils';
import { book, print } from '@qite/tide-client';

import type {
  BookingPackage,
  BookingPackageBookRequest,
  BookingPackageDossier,
  BookingPackageRequest,
  AgentPrintActionRequest,
  Pax,
  BookingPackagePax
} from '@qite/tide-client/build/types';

export interface UseOfferPrinterArgs {
  bookingPackage?: BookingPackage;
  getPax: () => Pax[] | undefined;
  tagIds?: number[];
  printActionId?: number | null;
  onPrinted?: (pdfUrl: string) => void;
}

export function useOfferPrinter({ bookingPackage, getPax, tagIds = [], printActionId = null, onPrinted }: UseOfferPrinterArgs) {
  const settings = useContext(SettingsContext);
  if (!settings) throw new Error('useOfferPrinter must be used inside <BookingWizard>');

  const { language, officeId } = settings;
  const agentId = (settings as any).agentAdressId;

  if (typeof agentId !== 'number' || agentId <= 0) {
    throw new Error('Missing agentAdressId in wizard settings');
  }

  const [stage, setStage] = useState<'idle' | 'creating' | 'printing'>('idle');
  const loading = stage !== 'idle';

  const createOffer = useCallback(async (): Promise<BookingPackageDossier> => {
    const paxRaw = getPax();
    if (!bookingPackage || !paxRaw?.length) {
      throw new Error('Missing booking package or pax');
    }

    const pax = paxRaw as unknown as BookingPackagePax[];

    const request: BookingPackageRequest<BookingPackageBookRequest> = {
      officeId,
      agentId,
      payload: {
        package: bookingPackage,
        status: 0,
        pax,
        nonTravelPax: [],
        notifications: [],
        tagIds,
        customerRequests: []
      }
    };

    const cfg = buildTideClientConfig();
    return book(cfg, request, undefined, language);
  }, [agentId, bookingPackage, getPax, language, officeId, tagIds]);

  const languageData = [
    { code: 'nl-BE', tideId: 1 },
    { code: 'fr-BE', tideId: 2 },
    { code: 'en-GB', tideId: 3 }
  ];

  function getTideLanguageId(code: string) {
    return languageData.find((l) => l.code === code)?.tideId || 1;
  }

  const printOffer = useCallback(
    async (offer: BookingPackageDossier) => {
      const cfg = buildTideClientConfig();

      const req: AgentPrintActionRequest = {
        id: printActionId ?? 0,
        dossierNumber: (offer as any).dossierNumber ?? (offer as any).number,
        languageId: getTideLanguageId(language)
      };

      const res = await print(cfg, req);
      const buf = await res.arrayBuffer();
      const url = URL.createObjectURL(new Blob([buf], { type: 'application/pdf' }));
      onPrinted?.(url);
      window.open(url);
    },
    [language, onPrinted]
  );

  const handlePrint = useCallback(async () => {
    try {
      setStage('creating');
      const offer = await createOffer();
      setStage('printing');
      await printOffer(offer);
    } catch (err) {
      console.error('Offer print failed:', err);
      throw err;
    } finally {
      setStage('idle');
    }
  }, [createOffer, printOffer]);

  return { handlePrint, loading, stage };
}