import { dateLocaleCode } from '@/lib/dateFnsI18n';
import { useEffect, useRef, useState } from 'react';
import { useSeoMeta } from '@unhead/react';
import { nip19 } from 'nostr-tools';
import { ImageWithFallback } from '@/components/ImageWithFallback';
import { Badge } from '@/components/ui/badge';
import { Button } from '@/components/ui/button';
import { Textarea } from '@/components/ui/textarea';
import { Link } from 'react-router-dom';
import { Skeleton } from '@/components/ui/skeleton';
import {
  Dialog,
  DialogContent,
  DialogHeader,
  DialogTitle,
  DialogDescription,
} from '@/components/ui/dialog';
import {
  Zap, MapPin, Shield, Layers, Crown, Radio,
  ArrowRight, Share2, CheckCircle2, Users, Store, Calendar,
  GraduationCap, Route, Eye, Send,
} from 'lucide-react';
import { useAuthor } from '@/hooks/useAuthor';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { useNostrPublish } from '@/hooks/useNostrPublish';
import { useGrowthStats } from '@/hooks/useGrowthStats';
import { useToast } from '@/hooks/useToast';
import { useTranslation } from '@/contexts/language';
import { genUserName } from '@/lib/genUserName';
import { Avatar, AvatarImage, AvatarFallback } from '@/components/ui/avatar';
import { NewsletterSubscribeButton } from '@/components/NewsletterSubscribeButton';
import { NewsletterComposer } from '@/components/NewsletterComposer';
import { NewsletterBackfillPanel } from '@/components/NewsletterBackfillPanel';
import { useNewsletterIssues } from '@/hooks/useNewsletterIssues';
import { useNewsletterSubscriberCount } from '@/hooks/useNewsletterSubscriberCount';
import { useNewsletterRead } from '@/hooks/useNewsletterRead';
import { NEWSLETTER_KIND, type SkateNewsletterIssue } from '@/lib/types';

// ─── Admin pubkeys allowed to publish newsletter as kind 1 ───────────────────

import { isAdminPubkey } from '@/lib/admins';

// ─── Newsletter issue structure ───────────────────────────────────────────────
//
import { NEWSLETTER_ISSUES, type NewsletterUpdate, type SpotOfTheWeek, type NewsletterIssue } from '@/lib/newsletterIssues';

// ─── Nostr post preview + publish ────────────────────────────────────────────

function NostrPreviewModal({
  issue,
  open,
  onClose,
  onConfirm,
  isPending,
}: {
  issue: NewsletterIssue;
  open: boolean;
  onClose: () => void;
  onConfirm: (text: string) => void;
  isPending: boolean;
}) {
  const { t } = useTranslation();
  const { user } = useCurrentUser();
  const author = useAuthor(user?.pubkey ?? '');
  const metadata = author.data?.metadata;
  const displayName = metadata?.name ?? genUserName(user?.pubkey ?? '');
  const avatar = metadata?.picture;
  const now = new Date();
  const timeStr = now.toLocaleTimeString(dateLocaleCode(), { hour: 'numeric', minute: '2-digit' });

  const [editing, setEditing] = useState(false);
  const [editedText, setEditedText] = useState(issue.nostrText);

  const currentText = editing ? editedText : issue.nostrText;

  const renderPreviewText = (text: string) => {
    return text.split('\n').map((line, i) => {
      const parts = line.split(/(\s+)/).map((word, j) => {
        if (word.startsWith('#')) return <span key={j} className="text-[#1d9bf0]">{word}</span>;
        if (word.startsWith('https://')) return <span key={j} className="text-[#1d9bf0] underline underline-offset-2">{word}</span>;
        return <span key={j}>{word}</span>;
      });
      return <p key={i} className={line === '' ? 'h-3' : ''}>{parts}</p>;
    });
  };

  return (
    <Dialog open={open} onOpenChange={onClose}>
      <DialogContent className="bg-black border-2 border-[#ccff00]/40 max-w-lg w-[calc(100vw-2rem)] mx-auto">
        <DialogHeader>
          <DialogTitle className="text-white flex items-center gap-2">
            <Eye className="h-4 w-4 text-[#ccff00]" />
            {editing ? t('common.edit') : t('walletUi.newsletter.previewLabel')} — {t('walletUi.newsletter.dropNumber', { number: `#${String(issue.number).padStart(3, '0')}` })}
          </DialogTitle>
          <DialogDescription className="text-gray-500 text-xs">
            {editing
              ? t('walletUi.newsletter.editNoteDesc')
              : t('walletUi.newsletter.previewNoteDesc')}
          </DialogDescription>
        </DialogHeader>

        {editing ? (
          /* ── Edit mode ── */
          <div className="space-y-2 mt-2">
            <Textarea
              value={editedText}
              onChange={e => setEditedText(e.target.value)}
              className="bg-[#0f0f0f] border-white/10 text-gray-200 text-sm font-mono leading-relaxed min-h-[200px] resize-none focus:border-[#ccff00]/40"
              autoFocus
            />
            <p className="text-[10px] text-gray-600 text-right">{t('walletUi.newsletter.characters', { count: editedText.length })}</p>
          </div>
        ) : (
          /* ── Preview mode ── */
          <>
            <div className="mt-2 rounded-2xl border border-white/10 bg-[#0f0f0f] overflow-hidden">
              <div className="flex items-center gap-3 px-4 pt-4 pb-2">
                <Avatar className="h-10 w-10 border-2 border-[#ccff00]/30 flex-shrink-0">
                  <AvatarImage src={avatar} alt={displayName} />
                  <AvatarFallback className="bg-[#ccff00]/10 text-[#ccff00] text-xs font-bold">
                    {displayName.slice(0, 2).toUpperCase()}
                  </AvatarFallback>
                </Avatar>
                <div className="flex-1 min-w-0">
                  <p className="text-white font-bold text-sm truncate">{displayName}</p>
                  <p className="text-gray-500 text-xs">{timeStr} · via skate-spots.org</p>
                </div>
              </div>
              <div className="px-4 pb-4 text-sm text-gray-200 leading-relaxed space-y-0">
                {renderPreviewText(currentText)}
              </div>
              <div className="flex items-center gap-5 px-4 py-3 border-t border-white/5 text-gray-600 text-xs">
                <span>💬 0</span><span>🔁 0</span><span>⚡ 0</span>
              </div>
            </div>
            <p className="text-[10px] text-gray-600 text-right -mt-1">{t('walletUi.newsletter.characters', { count: currentText.length })}</p>
          </>
        )}

        {/* Actions */}
        <div className="flex gap-3 mt-1">
          {editing ? (
            <>
              <Button
                variant="outline"
                onClick={() => setEditing(false)}
                className="flex-1 border-gray-700 text-gray-300 hover:text-white h-11"
              >
                {t('walletUi.newsletter.previewLabel')}
              </Button>
              <Button
                onClick={() => onConfirm(editedText)}
                disabled={isPending || editedText.trim().length === 0}
                className="flex-1 gap-2 bg-[#ccff00] text-black hover:bg-[#ccff00]/90 font-black uppercase text-xs h-11"
              >
                <Send className="h-3.5 w-3.5" />
                {isPending ? t('walletUi.newsletter.publishing') : t('walletUi.newsletter.publish')}
              </Button>
            </>
          ) : (
            <>
              <Button
                variant="outline"
                onClick={() => { setEditedText(issue.nostrText); setEditing(true); }}
                className="flex-1 border-gray-700 text-gray-300 hover:text-white h-11"
              >
                {t('walletUi.newsletter.editFirst')}
              </Button>
              <Button
                onClick={() => onConfirm(currentText)}
                disabled={isPending}
                className="flex-1 gap-2 bg-[#ccff00] text-black hover:bg-[#ccff00]/90 font-black uppercase text-xs h-11"
              >
                <Send className="h-3.5 w-3.5" />
                {isPending ? t('walletUi.newsletter.publishing') : t('walletUi.newsletter.publish')}
              </Button>
            </>
          )}
        </div>
      </DialogContent>
    </Dialog>
  );
}

function PublishToNostrButton({ issue }: { issue: NewsletterIssue }) {
  const { t } = useTranslation();
  const { user } = useCurrentUser();
  const { mutateAsync: publishEvent, isPending } = useNostrPublish();
  const { toast } = useToast();
  const [published, setPublished] = useState(false);
  const [showPreview, setShowPreview] = useState(false);

  const isAdmin = isAdminPubkey(user?.pubkey);
  if (!user || !isAdmin) return null;

  if (published) {
    return (
      <div className="flex items-center gap-2 text-green-400 text-sm font-bold">
        <CheckCircle2 className="h-4 w-4" />
        {t('walletUi.newsletter.publishedToNostr')}
      </div>
    );
  }

  const handleConfirmPublish = async (text: string) => {
    try {
      await publishEvent({
        kind: 1,
        content: text,
        tags: [
          ['t', 'skateboarding'],
          ['t', 'nostr'],
          ['t', 'skatespots'],
          ['t', 'spotr'],
          ['t', 'newsletter'],
          ['t', 'skatespotsnews'],
          ['r', 'https://skate-spots.org/#/newsletter'],
        ],
      });
      setPublished(true);
      setShowPreview(false);
      toast({ title: t('walletUi.newsletter.publishedToast'), description: t('walletUi.newsletter.postedToNostr', { number: `#${String(issue.number).padStart(3, '0')}` }) });
    } catch (err) {
      toast({
        title: t('walletUi.newsletter.publishFailed'),
        description: err instanceof Error ? err.message : t('walletUi.addToCollection.somethingWrong'),
        variant: 'destructive',
      });
    }
  };

  return (
    <>
      <Button
        onClick={() => setShowPreview(true)}
        className="gap-2 bg-[#ccff00] text-black hover:bg-[#ccff00]/90 font-black uppercase text-xs h-10 w-full sm:w-auto"
      >
        <Share2 className="h-3.5 w-3.5" />
        {t('walletUi.newsletter.postToNostr')}
      </Button>

      <NostrPreviewModal
        issue={issue}
        open={showPreview}
        onClose={() => setShowPreview(false)}
        onConfirm={handleConfirmPublish}
        isPending={isPending}
      />
    </>
  );
}

// ─── Live community stats block ───────────────────────────────────────────────

function LiveStatsBlock() {
  const { t } = useTranslation();
  const { data: stats, isLoading } = useGrowthStats();

  const items = [
    { icon: <MapPin className="h-4 w-4 text-[#ff0040]" />, label: t('walletUi.stats.spots'), value: stats?.totalSpots, trusted: stats?.trustedSpots, color: '#ff0040' },
    { icon: <Store className="h-4 w-4 text-[#4ade80]" />, label: t('walletUi.stats.shops'), value: stats?.totalShops, color: '#4ade80' },
    { icon: <Calendar className="h-4 w-4 text-[#ccff00]" />, label: t('walletUi.stats.events'), value: stats?.totalEvents, color: '#ccff00' },
    { icon: <Users className="h-4 w-4 text-yellow-400" />, label: t('walletUi.stats.mappers'), value: stats?.totalMappers, trusted: stats?.trustedMappers, color: '#facc15' },
    { icon: <GraduationCap className="h-4 w-4 text-[#ff6600]" />, label: t('walletUi.stats.coaches'), value: stats?.totalCoaches, color: '#ff6600' },
    { icon: <Route className="h-4 w-4 text-pink-400" />, label: t('walletUi.stats.tours'), value: stats?.totalTours, color: '#f472b6' },
  ];

  return (
    <div className="mt-4 p-4 rounded-2xl border-2 border-white/8 bg-white/3">
      <div className="grid grid-cols-3 gap-4">
        {items.map((item) => (
          <div key={item.label} className="text-center py-2">
            <div className="flex justify-center mb-1.5">{item.icon}</div>
            {isLoading ? (
              <Skeleton className="h-7 w-12 mx-auto mb-1" />
            ) : (
              <div className="font-black text-2xl leading-none" style={{ color: item.color }}>
                {(item.value ?? 0).toLocaleString()}
              </div>
            )}
            <div className="text-[10px] uppercase tracking-widest text-gray-500 mt-1">{item.label}</div>
            {item.trusted !== undefined && !isLoading && (
              <div className="text-[10px] text-green-500/60 mt-0.5">
                🛡 {item.trusted}
              </div>
            )}
          </div>
        ))}
      </div>
      <p className="text-[10px] text-gray-600 text-center mt-3 uppercase tracking-widest">
        {t('walletUi.newsletter.live')} · relay.skate-spots.org
      </p>
    </div>
  );
}

// ─── Shared sub-components ────────────────────────────────────────────────────

function SectionHeader({ emoji, label, color }: { emoji: string; label: string; color: string }) {
  return (
    <div className="flex items-center gap-3">
      <span className="text-xl">{emoji}</span>
      <h2 className="text-xs font-black uppercase tracking-widest" style={{ color }}>
        {label}
      </h2>
      <div className="flex-1 h-px" style={{ background: `${color}30` }} />
    </div>
  );
}

const TAG_COLORS: Record<string, string> = {
  green: 'bg-green-500/15 text-green-400 border-green-500/30',
  blue: 'bg-blue-500/15 text-blue-400 border-blue-500/30',
  yellow: 'bg-yellow-500/15 text-yellow-400 border-yellow-500/30',
  red: 'bg-[#ff0040]/15 text-[#ff0040] border-[#ff0040]/30',
  purple: 'bg-purple-500/15 text-purple-400 border-purple-500/30',
  lime: 'bg-[#ccff00]/15 text-[#ccff00] border-[#ccff00]/30',
  orange: 'bg-[#ff6600]/15 text-[#ff6600] border-[#ff6600]/30',
};

const ICON_MAP: Record<NewsletterUpdate['icon'], React.ReactNode> = {
  shield:    <Shield className="h-4 w-4 text-blue-400" />,
  security:  <Shield className="h-4 w-4 text-green-400" />,
  ux:        <Layers className="h-4 w-4 text-[#ff0040]" />,
  feature:   <Zap className="h-4 w-4 text-[#ccff00]" />,
  fix:       <CheckCircle2 className="h-4 w-4 text-purple-400" />,
  community: <Crown className="h-4 w-4 text-yellow-400" />,
  perf:      <Radio className="h-4 w-4 text-orange-400" />,
};

// Tag label → TAG_COLORS key (best-effort match)
function tagColorKey(tag: string): string {
  const t = tag.toLowerCase();
  if (t.includes('security') || t.includes('protect')) return 'green';
  if (t.includes('ux') || t.includes('map'))            return 'red';
  if (t.includes('spam') || t.includes('defense'))      return 'purple';
  if (t.includes('transparent') || t.includes('trust')) return 'lime';
  if (t.includes('badge') || t.includes('imperson'))    return 'yellow';
  if (t.includes('feed') || t.includes('quality'))      return 'orange';
  return 'lime';
}

function UpdateCard({ update }: { update: NewsletterUpdate }) {
  const colorKey = tagColorKey(update.tag);
  return (
    <div className="p-4 rounded-xl border border-white/8 bg-white/3 hover:bg-white/5 transition-colors">
      <div className="flex items-start gap-3">
        <div className="mt-0.5 flex-shrink-0">{ICON_MAP[update.icon]}</div>
        <div className="flex-1 min-w-0">
          <div className="flex items-center gap-2 flex-wrap mb-1">
            <h3 className="font-bold text-white text-sm">{update.title}</h3>
            <span className={`inline-flex items-center px-2 py-0.5 rounded-full text-[10px] font-bold border ${TAG_COLORS[colorKey]}`}>
              {update.tag}
            </span>
          </div>
          <p className="text-gray-400 text-sm leading-relaxed">{update.body}</p>
        </div>
      </div>
    </div>
  );
}

function SpotOfTheWeekBlock({ spot }: { spot: SpotOfTheWeek }) {
  const { t } = useTranslation();
  const inner = (
    <div className="mt-4 rounded-2xl border-2 border-[#ff0040]/30 bg-[#ff0040]/5 overflow-hidden hover:border-[#ff0040]/50 transition-colors">
      {spot.image && (
        <div className="aspect-video w-full overflow-hidden">
          <ImageWithFallback src={spot.image} alt={spot.title} className="w-full h-full object-cover" />
        </div>
      )}
      <div className="p-5">
        <h3 className="font-black text-white text-lg uppercase mb-1">{spot.title}</h3>
        <p className="text-[#ff0040] text-xs font-bold flex items-center gap-1 mb-3">
          <MapPin className="h-3 w-3" />
          {spot.location}
        </p>
        <p className="text-gray-300 text-sm leading-relaxed">{spot.why}</p>
        {spot.mapperName && (
          <p className="text-gray-500 text-xs mt-3">
            {t('walletUi.newsletter.mappedBy')} <span className="text-gray-300 font-medium">{spot.mapperName}</span>
          </p>
        )}
        {spot.href && (
          <div className="mt-4">
            <span className="inline-flex items-center gap-1.5 text-[#ccff00] text-xs font-bold">
              {t('walletUi.newsletter.viewOnMap')} <ArrowRight className="h-3 w-3" />
            </span>
          </div>
        )}
      </div>
    </div>
  );

  return spot.href ? <Link to={spot.href}>{inner}</Link> : inner;
}

// ─── Helpers ──────────────────────────────────────────────────────────────────

function formatIssueDate(iso: string): string {
  return new Date(iso).toLocaleDateString(dateLocaleCode(), {
    year: 'numeric', month: 'long', day: 'numeric',
  });
}

// ─── Issue renderer ───────────────────────────────────────────────────────────

function IssueArticle({ issue }: { issue: NewsletterIssue }) {
  const { t } = useTranslation();
  return (
    <article>
      {/* Cover (optional) */}
      {issue.image && (
        <div className="mb-6 aspect-[2/1] w-full overflow-hidden rounded-2xl border-2 border-white/8">
          <ImageWithFallback
            src={issue.image}
            alt={`SkateSpots Drop #${String(issue.number).padStart(3, '0')} cover`}
            className="h-full w-full object-cover"
          />
        </div>
      )}

      {/* Issue header */}
      <div className="mb-8 pb-6 border-b border-white/8">
        {/* Top row: issue number badge + date */}
        <div className="flex items-center justify-between gap-3 mb-3">
          <div className="text-[10px] font-black uppercase tracking-widest text-gray-500">
            {formatIssueDate(issue.date)}
          </div>
          <div className="w-10 h-10 rounded-xl bg-gradient-to-br from-[#ff0040] to-[#ff6600] flex items-center justify-center shadow-lg shadow-[#ff0040]/30 flex-shrink-0">
            <span className="text-white font-black text-[10px]" style={{ fontFamily: 'Impact, "Arial Black", sans-serif' }}>
              #{String(issue.number).padStart(3, '0')}
            </span>
          </div>
        </div>
        {/* Issue number large */}
        <h2 className="text-4xl sm:text-5xl font-black uppercase leading-none text-white mb-2"
          style={{ fontFamily: 'Impact, "Arial Black", sans-serif' }}>
          #{String(issue.number).padStart(3, '0')}
        </h2>
        {/* Vibe line */}
        <p className="text-gray-400 text-sm leading-relaxed mb-4">{issue.vibe}</p>
        {/* Publish button — full width on mobile, auto on larger */}
        <div className="flex">
          <PublishToNostrButton issue={issue} />
        </div>
      </div>

      <div className="space-y-10">

        {/* ── Community Stats — live numbers ── */}
        <section>
          <SectionHeader emoji="📊" label={t('walletUi.newsletter.sectionStats')} color="#facc15" />
          <LiveStatsBlock />
        </section>

        {/* ── What's New ── */}
        <section>
          <SectionHeader emoji="🛠" label={t('walletUi.newsletter.sectionWhatsNew')} color="#ccff00" />
          <div className="space-y-3 mt-4">
            {issue.updates.map((u, i) => (
              <UpdateCard key={i} update={u} />
            ))}
          </div>
        </section>

        {/* ── Spot of the Week ── */}
        <section>
          <SectionHeader emoji="📍" label={t('walletUi.newsletter.sectionSpotOfWeek')} color="#ff0040" />
          {issue.spotOfTheWeek ? (
            <SpotOfTheWeekBlock spot={issue.spotOfTheWeek} />
          ) : (
            <div className="mt-4 p-5 rounded-2xl border-2 border-[#ff0040]/20 bg-[#ff0040]/5">
              <p className="text-gray-500 text-sm italic">
                {t('walletUi.newsletter.noSpotPicked')}
              </p>
              <Link
                to="/map"
                className="inline-flex items-center gap-2 mt-3 text-[#ccff00] text-sm font-bold hover:opacity-80 transition-opacity"
              >
                {t('walletUi.newsletter.browseMap')} <ArrowRight className="h-3.5 w-3.5" />
              </Link>
            </div>
          )}
        </section>

        {/* ── Community ── */}
        <section>
          <SectionHeader emoji="👥" label={t('walletUi.newsletter.sectionCommunity')} color="#ff6600" />
          <div className="mt-4 p-5 rounded-2xl border-2 border-[#ff6600]/30 bg-[#ff6600]/5">
            <p className="text-gray-300 text-sm leading-relaxed">{issue.communityNote}</p>
            <div className="mt-4 flex flex-wrap gap-2">
              <Link to="/lab">
                <Badge className="bg-[#ff0040]/20 text-[#ff0040] border border-[#ff0040]/40 hover:bg-[#ff0040]/30 cursor-pointer">
                  {t('nav.lab')}
                </Badge>
              </Link>
              <Link to="/events">
                <Badge className="bg-[#ccff00]/20 text-[#ccff00] border border-[#ccff00]/40 hover:bg-[#ccff00]/30 cursor-pointer">
                  {t('nav.events')}
                </Badge>
              </Link>
              <Link to="/map">
                <Badge className="bg-[#ff6600]/20 text-[#ff6600] border border-[#ff6600]/40 hover:bg-[#ff6600]/30 cursor-pointer">
                  {t('walletUi.newsletter.spotMap')}
                </Badge>
              </Link>
              <Link to="/stats">
                <Badge className="bg-yellow-500/20 text-yellow-400 border border-yellow-500/40 hover:bg-yellow-500/30 cursor-pointer">
                  {t('walletUi.newsletter.statsBadge')}
                </Badge>
              </Link>
            </div>
          </div>
        </section>

        {/* ── Support ── */}
        <section>
          <SectionHeader emoji="⚡" label={t('walletUi.newsletter.sectionSupport')} color="#f7931a" />
          <div className="mt-4 p-5 rounded-2xl border-2 border-[#f7931a]/30 bg-[#f7931a]/5">
            <p className="text-sm text-gray-300 mb-3">
              {t('walletUi.newsletter.supportDesc')}
            </p>
            <a
              href="https://angor.io/project/angor1qtunna00uqyx52rr0nvqa059z2gknhrmn7urd6z"
              target="_blank"
              rel="noopener noreferrer"
              className="inline-flex items-center gap-2 text-[#f7931a] text-sm font-bold hover:opacity-80 transition-opacity"
            >
              <Zap className="h-4 w-4" />
              angor.io — SkateSpots
              <ArrowRight className="h-3.5 w-3.5" />
            </a>
          </div>
        </section>

      </div>
    </article>
  );
}

// ─── Live issues (published to Nostr as NIP-23 articles) ─────────────────────

function LiveIssueCard({ issue }: { issue: SkateNewsletterIssue }) {
  const { t } = useTranslation();
  const naddr = nip19.naddrEncode({
    kind: NEWSLETTER_KIND,
    pubkey: issue.pubkey,
    identifier: issue.identifier,
  });
  const date = new Date(issue.publishedAt * 1000).toLocaleDateString(dateLocaleCode(), {
    year: 'numeric',
    month: 'long',
    day: 'numeric',
  });

  return (
    <Link
      to={`/${naddr}`}
      className="group block overflow-hidden rounded-2xl border-2 border-[#ccff00]/20 bg-white/[0.03] transition-all hover:border-[#ccff00]/50 hover:bg-white/[0.06]"
    >
      {issue.image && (
        <div className="aspect-video w-full overflow-hidden">
          <img
            src={issue.image}
            alt={issue.title}
            className="h-full w-full object-cover transition-transform duration-300 group-hover:scale-105"
            loading="lazy"
          />
        </div>
      )}
      <div className="p-5">
        <p className="mb-1.5 text-[10px] font-black uppercase tracking-widest text-gray-500">{date}</p>
        <h3 className="mb-1 text-lg font-black uppercase leading-tight text-white group-hover:text-[#ccff00]">
          {issue.title}
        </h3>
        {issue.summary && <p className="line-clamp-2 text-sm text-gray-400">{issue.summary}</p>}
        <span className="mt-3 inline-flex items-center gap-1.5 text-xs font-bold text-[#ccff00]">
          {t('walletUi.newsletter.readFull')} <ArrowRight className="h-3.5 w-3.5" />
        </span>
      </div>
    </Link>
  );
}

/** Social-proof subscriber tally shown under the subscribe CTA. */
function SubscriberCount() {
  const { t } = useTranslation();
  const { data: count, isLoading } = useNewsletterSubscriberCount();
  if (isLoading || !count || count < 3) return null; // hide until it's meaningful
  const rounded = count >= 100 ? `${Math.floor(count / 50) * 50}+` : `${count}`;
  return (
    <p className="flex items-center justify-center gap-1.5 text-[11px] font-bold uppercase tracking-widest text-[#ccff00]">
      <Users className="h-3 w-3" />
      {t('walletUi.newsletter.joinSkaters', { count: rounded })}
    </p>
  );
}

function LiveIssuesSection() {
  const { t } = useTranslation();
  const { data: issues, isLoading } = useNewsletterIssues();

  if (isLoading) {
    return (
      <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
        <Skeleton className="h-56 w-full rounded-2xl" />
        <Skeleton className="h-56 w-full rounded-2xl" />
      </div>
    );
  }

  if (!issues || issues.length === 0) return null;

  return (
    <section className="mb-16">
      <SectionHeader emoji="📡" label={t('walletUi.newsletter.sectionLatestDrops')} color="#ccff00" />
      <div className="mt-4 grid grid-cols-1 gap-4 sm:grid-cols-2">
        {issues.map((issue) => (
          <LiveIssueCard key={issue.id} issue={issue} />
        ))}
      </div>
    </section>
  );
}

// ─── Page ─────────────────────────────────────────────────────────────────────

export default function NewsletterPage() {
  const { t } = useTranslation();
  useSeoMeta({
    title: t('seoUi.newsletterTitle'),
    description: t('seoUi.newsletterDesc'),
  });

  // Opening the newsletter clears the "News" unread badge in the bell — once
  // per visit. The ref guard means a changing callback identity can never turn
  // this into a render loop (it did: `markNewsletterRead` used to change on
  // every render, so the effect re-ran forever: "Maximum update depth exceeded").
  const { markNewsletterRead } = useNewsletterRead();
  const markedReadRef = useRef(false);
  useEffect(() => {
    if (markedReadRef.current) return;
    markedReadRef.current = true;
    markNewsletterRead();
  }, [markNewsletterRead]);

  return (
    <>
      <div className="container max-w-2xl px-4 py-8 md:py-14 pb-24 md:pb-14">

        {/* ── Masthead ── */}
        <div className="mb-10 text-center">
          <div className="inline-flex items-center gap-2 px-3 py-1.5 rounded-full border border-[#ccff00]/30 bg-[#ccff00]/5 text-[10px] font-black uppercase tracking-widest text-[#ccff00] mb-5">
            <Radio className="h-3 w-3" />
            {t('walletUi.newsletter.weeklyDrops')}
          </div>
          <h1
            className="text-4xl sm:text-6xl font-black uppercase leading-none mb-3"
            style={{ fontFamily: 'Impact, "Arial Black", sans-serif' }}
          >
            <span className="bg-gradient-to-r from-[#ff0040] via-[#ff6600] to-[#ccff00] bg-clip-text text-transparent">
              SKATE
            </span>
            <span className="text-white">SPOTS</span>
          </h1>
          <p className="text-gray-500 text-xs uppercase tracking-widest mb-6">
            {t('walletUi.newsletter.tagline')}
          </p>

          {/* Subscribe — routes new drops into the notification bell */}
          <div className="flex flex-col items-center gap-2">
            <div className="flex flex-wrap items-center justify-center gap-2">
              <NewsletterSubscribeButton />
              <NewsletterComposer />
            </div>
            <SubscriberCount />
            <p className="max-w-xs text-[11px] leading-snug text-gray-600">
              {t('walletUi.newsletter.freeNote')}
            </p>
            {/* Admin-only: publish the static archive issues to Nostr. */}
            <NewsletterBackfillPanel issues={NEWSLETTER_ISSUES} />
          </div>
        </div>

        {/* ── Live issues published to Nostr ── */}
        <LiveIssuesSection />

        {/* ── All issues ── */}
        <div className="space-y-20">
          {NEWSLETTER_ISSUES.map((issue) => (
            <IssueArticle key={issue.number} issue={issue} />
          ))}
        </div>

        {/* ── Page footer ── */}
        <div className="mt-16 pt-8 border-t border-white/8 text-center">
          <p className="text-xs text-gray-600 mb-2">
            {t('walletUi.newsletter.builtOn')}{' '}
            <a href="https://nostr.com" target="_blank" rel="noopener noreferrer" className="text-gray-500 hover:text-[#ccff00] transition-colors">
              Nostr
            </a>
            {' · '}
            <Link to="/license" className="text-gray-500 hover:text-[#ccff00] transition-colors">
              {t('walletUi.newsletter.openSource')}
            </Link>
            {' · '}
            <a href="https://angor.io/project/angor1qtunna00uqyx52rr0nvqa059z2gknhrmn7urd6z" target="_blank" rel="noopener noreferrer" className="text-gray-500 hover:text-[#ccff00] transition-colors">
              {t('walletUi.newsletter.supportUs')}
            </a>
          </p>
          <p className="text-[10px] text-gray-400 uppercase tracking-widest">
            {t('walletUi.newsletter.freeToSkate')}
          </p>
        </div>

      </div>
    </>
  );
}