import { useMemo, useState } from 'react';
import { useSeoMeta } from '@unhead/react';
import { Link } from 'react-router-dom';
import { ArrowLeft, HeartHandshake, Lock, MessagesSquare, UserPlus } from 'lucide-react';
import { CordnNativePanel } from '@/components/crew/CordnNativePanel';
import { Button } from '@/components/ui/button';
import { Card, CardContent } from '@/components/ui/card';
import { useTranslation } from '@/contexts/language';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { isAdminPubkey } from '@/lib/admins';
import { COMMUNITY_BOT_PUBKEY, COMMUNITY_ROOM } from '@/lib/cordn/community';
import { isNativePlatform } from '@/lib/platform';

/**
 * Public, app-wide Cordn room for questions and feedback. Unlike a crew room it
 * has no crew membership gate; the coordinator only carries ciphertext, and an
 * admin or the community bot approves each new device.
 */
export default function CommunityPage() {
  const { t } = useTranslation();
  const { user } = useCurrentUser();
  const canManage = isAdminPubkey(user?.pubkey);
  const [pendingRequests, setPendingRequests] = useState(0);

  const inviteUrl = useMemo(() => {
    const origin = isNativePlatform() ? 'https://skate-spots.org' : window.location.origin;
    return `${origin}/#/community`;
  }, []);

  useSeoMeta({
    title: t('communityUi.seoTitle'),
    description: t('communityUi.seoDescription'),
  });

  return (
    <div className="container mx-auto max-w-2xl px-4 py-6">
      <Button asChild variant="ghost" size="sm" className="mb-4 -ml-2 gap-1.5 text-gray-400">
        <Link to="/">
          <ArrowLeft className="h-4 w-4" /> {t('common.back')}
        </Link>
      </Button>

      <div className="mb-5">
        <div className="mb-2 flex items-center gap-2 text-[#ccff00]">
          <MessagesSquare className="h-5 w-5" />
          <span className="text-[10px] font-black uppercase tracking-widest">
            {t('communityUi.eyebrow')}
          </span>
        </div>
        <h1 className="text-4xl font-black uppercase leading-none text-white md:text-5xl">
          {t('communityUi.heading')}
        </h1>
        <p className="mt-2 text-sm text-gray-400">{t('communityUi.subtitle')}</p>
      </div>

      <Card className="mb-4 border-white/10 bg-black/40">
        <CardContent className="flex items-start gap-3 py-3">
          <Lock className="mt-0.5 h-4 w-4 shrink-0 text-teal-400" />
          <p className="text-xs text-gray-400">{t('communityUi.howItWorks')}</p>
        </CardContent>
      </Card>

      {canManage && pendingRequests > 0 && (
        <Card className="mb-4 border-amber-500/30 bg-amber-500/[0.06]" aria-live="polite">
          <CardContent className="flex items-start gap-3 py-3">
            <UserPlus className="mt-0.5 h-4 w-4 shrink-0 text-amber-300" />
            <div className="min-w-0 flex-1">
              <p className="text-sm font-bold text-amber-200">
                {t('communityUi.pendingRequests', { count: pendingRequests })}
              </p>
              <p className="mt-0.5 text-xs text-amber-200/70">
                {t('communityUi.pendingRequestsDesc')}
              </p>
              <button
                type="button"
                onClick={() => document.getElementById('community-requests')?.scrollIntoView({ behavior: 'smooth', block: 'center' })}
                className="mt-1.5 text-xs font-bold text-amber-200 underline underline-offset-2 hover:text-amber-100"
              >
                {t('cordnUi.checkRequests')}
              </button>
            </div>
          </CardContent>
        </Card>
      )}

      <CordnNativePanel
        crew={COMMUNITY_ROOM}
        canManage={canManage}
        canCreate={false}
        isMember
        scope="community"
        inviteUrl={inviteUrl}
        botPubkey={COMMUNITY_BOT_PUBKEY || undefined}
        onRequestsChange={setPendingRequests}
      />

      <div className="mt-5 flex items-center justify-center gap-2 text-xs text-gray-500">
        <HeartHandshake className="h-4 w-4 text-[#ccff00]/70" />
        <span>{t('communityUi.feedbackNote')}</span>
      </div>
    </div>
  );
}