'use client';

import { useQuery } from '@tanstack/react-query';
import { useParams } from 'next/navigation';
import { useLocale, useTranslations } from 'next-intl';
import { ArrowLeft, ArrowRight, CreditCard, FileText, Package, Pencil } from 'lucide-react';

import { getCsvBooking } from '@/lib/api';
import { Link } from '@/i18n/navigation';
import { Button } from '@/components/ui/button';
import { Callout } from '@/components/ui/callout';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { PageHeader } from '@/components/ui/PageHeader';
import { EmptyState, ErrorState, PageSpinner } from '@/components/ui/states';
import { BookingStatusBadge } from '@/components/bookings/BookingStatusBadge';

/**
 * Detail d'une reservation.
 *
 * La page interrogeait `GET /bookings/:id` et affichait un modele — expediteur,
 * destinataire, conteneurs — qui n'existe pas dans ce produit : la table
 * `bookings` n'a jamais ete creee, les reservations vivent dans `csv_bookings`.
 * Elle repondait donc 500 et tournait indefiniment. C'est ce qui donnait
 * l'impression qu'un clic sur une notification « ne faisait rien » : la
 * navigation avait bien lieu, la destination ne s'affichait jamais.
 *
 * Elle lit desormais `GET /csv-bookings/:id`, la meme source que la liste.
 */
export default function BookingDetailPage() {
  const t = useTranslations('dashboard.bookingDetail');
  const tList = useTranslations('dashboard.bookingsList');
  const tCommon = useTranslations('common');
  const locale = useLocale();
  const dateLocale = locale === 'fr' ? 'fr-FR' : 'en-US';
  const params = useParams();
  const bookingId = params.id as string;

  const {
    data: booking,
    isPending,
    isError,
    error,
    refetch,
  } = useQuery({
    queryKey: ['csv-booking', bookingId],
    queryFn: () => getCsvBooking(bookingId),
    enabled: Boolean(bookingId),
    // Une reservation introuvable ne le deviendra pas en reessayant : trois
    // tentatives ne faisaient que prolonger le tourniquet.
    retry: (failureCount, err) =>
      (err as { statusCode?: number })?.statusCode === 404 ? false : failureCount < 1,
  });

  const dateTime = (value?: string) =>
    value
      ? new Date(value).toLocaleString(dateLocale, { dateStyle: 'long', timeStyle: 'short' })
      : '—';

  if (isPending) return <PageSpinner label={tCommon('loading')} />;

  if (isError) {
    const missing = (error as { statusCode?: number })?.statusCode === 404;
    return missing ? (
      <EmptyState
        icon={Package}
        title={t('notFound')}
        description={t('notFoundBody')}
        action={
          <Button asChild variant="outline">
            <Link href="/dashboard/bookings">
              <ArrowLeft />
              {t('back')}
            </Link>
          </Button>
        }
      />
    ) : (
      <ErrorState
        title={t('errorTitle')}
        description={t('errorBody')}
        retryLabel={tCommon('retry')}
        onRetry={() => refetch()}
      />
    );
  }

  const unpaid = booking.status === 'PENDING_PAYMENT';
  const price = booking.priceEUR
    ? `${booking.priceEUR} €`
    : booking.priceUSD
      ? `${booking.priceUSD} $`
      : null;

  return (
    <>
      <PageHeader
        title={booking.bookingNumber ?? `#${booking.id.slice(0, 8).toUpperCase()}`}
        description={t('requestedOn', { date: dateTime(booking.requestedAt) })}
        actions={
          <>
            <BookingStatusBadge status={booking.status} />
            {unpaid && (
              <Button asChild>
                <Link href={`/dashboard/booking/${booking.id}/pay`}>
                  <CreditCard />
                  {tList('detail.payNow')}
                </Link>
              </Button>
            )}
          </>
        }
      />

      {unpaid && (
        <Callout variant="warning" className="mb-4">
          {tList('detail.pendingPaymentNotice')}
        </Callout>
      )}

      {booking.status === 'REJECTED' && booking.rejectionReason && (
        <Callout variant="danger" className="mb-4" title={t('rejected')}>
          {booking.rejectionReason}
        </Callout>
      )}

      <div className="grid gap-4 lg:grid-cols-3">
        <div className="flex flex-col gap-4 lg:col-span-2">
          {/* La route est ce qu'un transitaire regarde en premier : elle occupe
              la tete de page, pas une ligne de tableau parmi d'autres. */}
          <Card>
            <CardContent className="p-5">
              <div className="flex flex-wrap items-center gap-x-4 gap-y-2">
                <span className="font-heading text-h4 text-brand-navy">{booking.origin}</span>
                <span className="flex items-center gap-2 text-neutral-400">
                  <ArrowRight className="size-4" aria-hidden="true" />
                  {booking.transitDays ? (
                    <span className="text-body-xs">
                      {t('transitDays', { days: booking.transitDays })}
                    </span>
                  ) : null}
                </span>
                <span className="font-heading text-h4 text-brand-navy">{booking.destination}</span>
              </div>
              {booking.carrierName && (
                <p className="mt-2 text-body-sm text-neutral-500">
                  {t('carrier', { carrier: booking.carrierName })}
                </p>
              )}
            </CardContent>
          </Card>

          <Card>
            <CardHeader className="pb-3">
              <CardTitle>{tList('detail.cargo')}</CardTitle>
            </CardHeader>
            <CardContent>
              <dl className="grid gap-4 sm:grid-cols-3">
                <Field label={t('packing')}>
                  {booking.palletCount
                    ? tList('units.palletsCount', { count: booking.palletCount })
                    : '—'}
                </Field>
                <Field label={t('volume')}>
                  {booking.volumeCBM ? tList('units.cbm', { value: booking.volumeCBM }) : '—'}
                </Field>
                <Field label={t('weight')}>
                  {booking.weightKG ? tList('units.kg', { value: booking.weightKG }) : '—'}
                </Field>
              </dl>
              {booking.notes && (
                <p className="mt-4 border-t border-border pt-4 text-body-sm leading-6 text-neutral-600">
                  {booking.notes}
                </p>
              )}
            </CardContent>
          </Card>

          <Card>
            <CardHeader className="pb-3">
              <CardTitle>{t('documents', { count: booking.documents?.length ?? 0 })}</CardTitle>
            </CardHeader>
            <CardContent>
              {booking.documents?.length ? (
                <ul className="flex flex-col gap-2">
                  {booking.documents.map((document, index) => (
                    <li
                      key={index}
                      className="flex items-center gap-3 rounded-md border border-border px-4 py-3"
                    >
                      <FileText className="size-4 shrink-0 text-neutral-400" aria-hidden="true" />
                      <span className="min-w-0 flex-1 truncate text-body-sm text-neutral-700">
                        {document.fileName}
                      </span>
                      <span className="shrink-0 text-body-xs text-neutral-400">
                        {document.type}
                      </span>
                    </li>
                  ))}
                </ul>
              ) : (
                <EmptyState size="sm" icon={FileText} title={t('noDocuments')} />
              )}
            </CardContent>
          </Card>
        </div>

        <div className="flex flex-col gap-4">
          {price && (
            <Card>
              <CardHeader className="pb-3">
                <CardTitle>{tList('detail.price')}</CardTitle>
              </CardHeader>
              <CardContent>
                <p className="font-heading text-h3 text-brand-navy">{price}</p>
                <dl className="mt-4 flex flex-col gap-3 border-t border-border pt-4">
                  {booking.freightTotal ? (
                    <Field label={t('freight')}>
                      {booking.freightTotal} {booking.freightCurrency}
                    </Field>
                  ) : null}
                  {booking.fobTotal ? (
                    <Field label={t('destinationCharges')}>
                      {booking.fobTotal} {booking.fobCurrency}
                    </Field>
                  ) : null}
                  {booking.commissionAmountEur ? (
                    <Field label={t('commission')}>{booking.commissionAmountEur} €</Field>
                  ) : null}
                </dl>
              </CardContent>
            </Card>
          )}

          <Card>
            <CardHeader className="pb-3">
              <CardTitle>{t('timeline')}</CardTitle>
            </CardHeader>
            <CardContent>
              <dl className="flex flex-col gap-3">
                <Field label={t('requested')}>{dateTime(booking.requestedAt)}</Field>
                {booking.respondedAt && (
                  <Field label={t('responded')}>{dateTime(booking.respondedAt)}</Field>
                )}
                <Field label={t('reference')}>{booking.id}</Field>
              </dl>
            </CardContent>
          </Card>

          <Button asChild variant="outline">
            <Link href="/dashboard/bookings">
              <ArrowLeft />
              {t('back')}
            </Link>
          </Button>
        </div>
      </div>
    </>
  );
}

function Field({ label, children }: { label: string; children: React.ReactNode }) {
  return (
    <div className="min-w-0">
      <dt className="text-label uppercase text-neutral-400">{label}</dt>
      <dd className="mt-1 break-words text-body-sm text-neutral-700">{children}</dd>
    </div>
  );
}