import React from 'react';
import { usePage, router } from '@inertiajs/react';
import { useTranslation } from 'react-i18next';
import MarketingLayout from '@/layouts/mainWebsite';
import { Loader, CheckCircle } from 'lucide-react';
import { useLocalizedRoutes } from '@/hooks/useLocalizedRoutes';
import { useLocale } from '@/hooks/useLocale';
import { ADMIN_HOME_PATH } from '@/admin/constants';
import { Button } from '@/components/ui/button';
import { fetchGiftVoucherByCheckout, type GiftVoucherLookupResponse } from '@/lib/giftVouchers';

type SuccessProps = {
  type?: string;
};

const GiftSuccess: React.FC = () => {
  const { t } = useTranslation('marketing');
  const { localizedPath } = useLocalizedRoutes();
  const locale = useLocale();
  const [voucher, setVoucher] = React.useState<GiftVoucherLookupResponse | null>(null);
  const [loading, setLoading] = React.useState(true);
  const [error, setError] = React.useState<string | null>(null);
  const [copied, setCopied] = React.useState(false);

  React.useEffect(() => {
    const params = new URLSearchParams(window.location.search);
    const checkoutId = params.get('checkout_id') || sessionStorage.getItem('gift_checkout_id');
    const transactionId = params.get('transaction_id');

    fetchGiftVoucherByCheckout(checkoutId || undefined, transactionId || undefined)
      .then((data) => {
        if (data) {
          setVoucher(data);
        } else {
          setError(t('success.gift_lookup_failed'));
        }
      })
      .catch(() => setError(t('success.gift_lookup_failed')))
      .finally(() => setLoading(false));
  }, [t]);

  const onCopy = async () => {
    if (!voucher?.code) return;
    try {
      await navigator.clipboard.writeText(voucher.code);
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    } catch (e) {
      setError(t('success.gift_copy_failed'));
    }
  };

  const onShare = async () => {
    if (!voucher?.code) return;
    const text = t('success.gift_share_text', {
      code: voucher.code,
      amount: voucher.amount.toFixed(2),
      currency: voucher.currency,
    });

    if (navigator.share) {
      try {
        await navigator.share({ title: t('success.gift_title'), text });
        return;
      } catch (e) {
        // fall back to copy
      }
    }

    await onCopy();
  };

  return (
    <MarketingLayout title={t('success.gift_title')}>
      <div className="min-h-screen bg-gradient-to-b from-background via-muted/30 to-background py-16">
        <div className="mx-auto max-w-3xl space-y-6 px-4 text-center sm:px-6">
          <CheckCircle className="mx-auto h-12 w-12 text-green-500" />
          <h1 className="text-3xl font-bold text-foreground">{t('success.gift_title')}</h1>
          <p className="text-muted-foreground">{t('success.gift_description')}</p>
          <div className="rounded-xl border bg-card p-6 text-left shadow-sm">
            <h2 className="text-lg font-semibold">{t('success.gift_code_title')}</h2>
            {loading && <p className="text-muted-foreground">{t('success.gift_loading')}</p>}
            {error && <p className="text-destructive">{error}</p>}
            {voucher && (
              <div className="mt-3 space-y-3">
                <div className="flex flex-wrap items-center justify-between gap-3 rounded-lg border bg-muted/50 px-4 py-3">
                  <div className="text-left">
                    <p className="text-xs uppercase tracking-wide text-muted-foreground">{t('success.gift_code_label')}</p>
                    <p className="font-mono text-lg font-bold">{voucher.code}</p>
                  </div>
                  <div className="flex gap-2">
                    <Button size="sm" variant="secondary" onClick={onCopy}>
                      {copied ? t('success.gift_copied') : t('success.gift_copy')}
                    </Button>
                    <Button size="sm" onClick={onShare}>
                      {t('success.gift_share')}
                    </Button>
                  </div>
                </div>
                <p className="text-sm text-muted-foreground">
                  {t('success.gift_value', {
                    amount: voucher.amount.toFixed(2),
                    currency: voucher.currency,
                  })}
                </p>
                {voucher.expires_at && (
                  <p className="text-sm text-muted-foreground">
                    {t('success.gift_expires', {
                      date: new Date(voucher.expires_at).toLocaleDateString(locale || undefined),
                    })}
                  </p>
                )}
              </div>
            )}
          </div>
          <div className="rounded-xl border bg-card p-6 text-left shadow-sm">
            <h2 className="text-lg font-semibold">{t('success.gift_bullets_title')}</h2>
            <ul className="mt-3 list-disc space-y-2 pl-5 text-muted-foreground">
              <li>{t('success.gift_bullet_email')}</li>
              <li>{t('success.gift_bullet_validity')}</li>
              <li>{t('success.gift_bullet_redeem')}</li>
            </ul>
          </div>
          <div className="flex justify-center">
            <Button asChild size="lg">
              <a href={localizedPath('/', locale || undefined)}>{t('success.gift_cta_home')}</a>
            </Button>
          </div>
        </div>
      </div>
    </MarketingLayout>
  );
};

const AuthRedirectSuccess: React.FC<{ emailVerified?: boolean | null }> = ({ emailVerified }) => {
  const { t } = useTranslation('success');
  const { localizedPath } = useLocalizedRoutes();

  if (emailVerified) {
    router.visit(ADMIN_HOME_PATH, { preserveState: false });

    return (
      <div className="flex min-h-screen items-center justify-center bg-gray-50">
        <div className="text-center">
          <Loader className="mx-auto mb-2 inline-block h-8 w-8 animate-spin rounded-full border border-2 border-blue-600 border-t-transparent" />
          <p className="text-gray-600">{t('redirecting')}</p>
        </div>
      </div>
    );
  }

  return (
    <MarketingLayout title={t('complete_purchase')}>
      <div className="flex min-h-screen items-center justify-center bg-gray-50 py-12 px-4 sm:px-6 lg:px-8">
        <div className="w-full max-w-md rounded-lg bg-white p-8 shadow-md">
          <div className="text-center">
            <h2 className="mb-4 text-2xl font-bold text-gray-900">{t('complete_purchase')}</h2>
            <p className="mb-6 text-gray-600">{t('login_to_continue')}</p>
            <a
              href={localizedPath('/login')}
              className="mb-2 block rounded-md bg-blue-600 px-6 py-2 font-medium text-white transition duration-300 hover:bg-blue-700"
            >
              {t('login')}
            </a>
          </div>
        </div>
      </div>
    </MarketingLayout>
  );
};

const Success: React.FC<SuccessProps> = () => {
  const { auth } = usePage<{ auth: { user?: { email_verified_at?: string | null } } }>().props;
  const searchParams = typeof window !== 'undefined' ? new URLSearchParams(window.location.search) : new URLSearchParams();
  const type = searchParams.get('type');

  if (type === 'gift') {
    return <GiftSuccess />;
  }

  return <AuthRedirectSuccess emailVerified={auth.user?.email_verified_at} />;
};

Success.layout = (page: React.ReactNode) => page;

export default Success;