import { useState } from 'react';
import { useSeoMeta } from '@unhead/react';
import { useParams, Link } from 'react-router-dom';
import { nip19 } from 'nostr-tools';
import { Layout } from '@/components/Layout';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { Avatar, AvatarFallback, AvatarImage } from '@/components/ui/avatar';
import { Skeleton } from '@/components/ui/skeleton';
import { ZapButton } from '@/components/ZapButton';
import { ZapCrewDialog } from '@/components/ZapCrewDialog';
import { ClinkPayButton } from '@/components/ClinkPayButton';
import { CollectiveMembers } from '@/components/CollectiveMembers';
import { CrewNip05Badge } from '@/components/CrewNip05Badge';
import { CrewChat } from '@/components/CrewChat';
import { CrewAgentPanel } from '@/components/CrewAgentPanel';
import { CrewTreasuryCard } from '@/components/CrewTreasuryCard';
import { CrewLookingForCard } from '@/components/CrewLookingFor';
import { CrewRequestToJoin } from '@/components/CrewRequestToJoin';
import { CrewRepBadge } from '@/components/CrewBadge';
import { useCrewEvents } from '@/hooks/useCrewEvents';
import { EventCard } from '@/components/EventCard';
import { ConfirmMembershipCard } from '@/components/ConfirmMembershipCard';
import { LinkedLabCard } from '@/components/CrossLinkCards';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
  AlertDialogTrigger,
} from '@/components/ui/alert-dialog';
import { useCollectiveMembers } from '@/hooks/useCollectiveMembers';
import { useCrewRole } from '@/hooks/useCrewRole';
import { useCrewModeration, useHideCrewPost } from '@/hooks/useCrewModeration';
import { CrewInviteDialog } from '@/components/CrewInviteDialog';
import { DeleteEntityDialog } from '@/components/DeleteEntityDialog';
import { useToast } from '@/hooks/useToast';
import { NoteContent } from '@/components/NoteContent';
import { useCrew } from '@/hooks/useCrews';
import { useCrewFeed } from '@/hooks/useCrewFeed';
import { useAuthor } from '@/hooks/useAuthor';
import { genUserName } from '@/lib/genUserName';
import { SKATE_CREW_KIND, SKATE_SPOT_KIND, CREW_VIBE_LABELS } from '@/lib/types';
import { sanitizeUrl, urlDomain } from '@/lib/sanitizeUrl';
import { cn } from '@/lib/utils';
import NotFound from './NotFound';
import { Users, MapPin, ArrowLeft, Calendar, Globe, Instagram, Edit, MessageSquare, Zap, ShieldCheck, EyeOff } from 'lucide-react';
import type { NostrEvent } from '@nostrify/nostrify';

function FeedItem({
  event,
  canModerate,
  onHide,
  isHiding,
}: {
  event: NostrEvent;
  canModerate?: boolean;
  onHide?: (event: NostrEvent) => void;
  isHiding?: boolean;
}) {
  const author = useAuthor(event.pubkey);
  const metadata = author.data?.metadata;
  const name = metadata?.name ?? genUserName(event.pubkey);
  const npub = nip19.npubEncode(event.pubkey);

  return (
    <div className="rounded-xl border border-white/5 bg-black/40 p-3">
      <div className="mb-1.5 flex items-center gap-2">
        <Link to={`/${npub}`}>
          <Avatar className="h-7 w-7">
            <AvatarImage src={metadata?.picture} alt={name} />
            <AvatarFallback className="text-[10px]">{name.slice(0, 2).toUpperCase()}</AvatarFallback>
          </Avatar>
        </Link>
        <Link to={`/${npub}`} className="text-sm font-bold text-gray-200 hover:text-white truncate">
          {name}
        </Link>
        <span className="ml-auto text-[11px] text-gray-500">
          {new Date(event.created_at * 1000).toLocaleDateString()}
        </span>
        {canModerate && onHide && (
          <AlertDialog>
            <AlertDialogTrigger asChild>
              <Button
                type="button"
                variant="ghost"
                size="icon"
                className="h-6 w-6 shrink-0 text-gray-500 hover:text-red-400"
                disabled={isHiding}
                aria-label="Hide this post"
                title="Hide from crew feed (admin)"
              >
                <EyeOff className="h-3.5 w-3.5" />
              </Button>
            </AlertDialogTrigger>
            <AlertDialogContent>
              <AlertDialogHeader>
                <AlertDialogTitle>Hide this post?</AlertDialogTitle>
                <AlertDialogDescription>
                  As a crew moderator you can hide this post from the crew feed for everyone.
                  The original note stays on Nostr — this only removes it from this crew's feed.
                </AlertDialogDescription>
              </AlertDialogHeader>
              <AlertDialogFooter>
                <AlertDialogCancel>Cancel</AlertDialogCancel>
                <AlertDialogAction
                  onClick={() => onHide(event)}
                  className="bg-red-600 hover:bg-red-700"
                >
                  Hide post
                </AlertDialogAction>
              </AlertDialogFooter>
            </AlertDialogContent>
          </AlertDialog>
        )}
      </div>
      <div className="whitespace-pre-wrap break-words text-sm text-gray-300">
        <NoteContent event={event} className="text-sm" />
      </div>
    </div>
  );
}

export default function CrewDetailPage() {
  const { pubkey, identifier } = useParams<{ pubkey: string; identifier: string }>();
  const { data: crew, isLoading, error } = useCrew(identifier || '', pubkey);
  const author = useAuthor(crew?.pubkey);
  const { isFounder, isAdmin, role, canManage } = useCrewRole(crew);
  const { toast } = useToast();
  const [agentOpen, setAgentOpen] = useState(false);

  useSeoMeta({
    title: crew ? `${crew.name} - SkateSpots Crew` : 'Crew - SkateSpots',
    description: crew?.bio || 'A skate crew on SkateSpots.',
  });

  // Feed = founder + listed members
  const feedAuthors = crew ? [crew.pubkey, ...crew.members] : [];
  const { data: feed, isLoading: feedLoading } = useCrewFeed(feedAuthors);

  // Crew-hosted events (jams, comps, meetups).
  const { data: crewEvents } = useCrewEvents(crew?.pubkey, crew?.identifier);

  // Moderation — founder + admins can hide feed posts (NIP-32 labels).
  const crewCoord = crew ? `${SKATE_CREW_KIND}:${crew.pubkey}:${crew.identifier}` : '';
  const moderators = crew ? Array.from(new Set([crew.pubkey, ...crew.admins])) : [];
  const { data: hiddenIds } = useCrewModeration({
    crewCoord,
    moderators,
    enabled: !!crew,
  });
  const { mutateAsync: hidePost, isPending: isHiding } = useHideCrewPost(crewCoord);

  const handleHidePost = async (ev: NostrEvent) => {
    try {
      await hidePost({ postId: ev.id, postAuthor: ev.pubkey });
      toast({ title: 'Post hidden', description: 'Removed from the crew feed for everyone.' });
    } catch (err) {
      toast({
        title: 'Failed to hide post',
        description: err instanceof Error ? err.message : 'Please try again.',
        variant: 'destructive',
      });
    }
  };

  // Confirmed members (for "Zap the Crew" — only pay people who vouched in)
  const { data: memberStatuses } = useCollectiveMembers({
    kind: SKATE_CREW_KIND,
    founderPubkey: crew?.pubkey ?? '',
    identifier: crew?.identifier ?? '',
    claimedMembers: crew?.members ?? [],
    enabled: !!crew && (crew.members.length ?? 0) > 0,
  });

  // Recipients: founder + confirmed members (dedup, founder always included)
  const crewZapRecipients = crew
    ? Array.from(new Set([
        crew.pubkey,
        ...(memberStatuses ?? []).filter((m) => m.status === 'confirmed').map((m) => m.pubkey),
      ]))
    : [];

  if (isLoading) {
    return (
      <Layout>
        <div className="container px-4 py-8 max-w-4xl">
          <Skeleton className="h-6 w-32 mb-6" />
          <div className="grid md:grid-cols-3 gap-6">
            <div className="md:col-span-2 space-y-6">
              <Skeleton className="h-48 w-full" />
              <Skeleton className="h-64 w-full" />
            </div>
            <Skeleton className="h-64 w-full" />
          </div>
        </div>
      </Layout>
    );
  }

  if (error || !crew) return <NotFound />;

  const npub = nip19.npubEncode(crew.pubkey);
  const founderName = author.data?.metadata?.name ?? genUserName(crew.pubkey);
  const hasMembers = crew.members.length > 0;

  return (
    <Layout>
      <div className="container px-4 py-8 max-w-4xl">
        <Link to="/crews" className="inline-flex items-center text-muted-foreground hover:text-foreground transition-colors mb-6">
          <ArrowLeft className="h-4 w-4 mr-2" />
          Back to Crews
        </Link>

        <div className="grid md:grid-cols-3 gap-6">
          {/* Main */}
          <div className="md:col-span-2 space-y-6">
            {/* Confirm membership prompt (listed pending members only) */}
            {hasMembers && (
              <ConfirmMembershipCard
                kind={SKATE_CREW_KIND}
                founderPubkey={crew.pubkey}
                identifier={crew.identifier}
                collectiveName={crew.name}
                claimedMembers={crew.members}
                accentBg="bg-teal-500 hover:bg-teal-600 text-black"
              />
            )}

            {/* Hero */}
            <Card className="bg-black/90 border-2 border-teal-500/40 overflow-hidden">
              <CardContent className="pt-6">
                <div className="flex items-start gap-4 mb-4">
                  <Avatar className="h-20 w-20 rounded-2xl border-2 border-teal-500/40">
                    <AvatarImage src={crew.image} alt={crew.name} className="object-cover" />
                    <AvatarFallback className="rounded-2xl bg-teal-900/40 text-teal-300 font-black text-xl">
                      {crew.name.slice(0, 2).toUpperCase()}
                    </AvatarFallback>
                  </Avatar>
                  <div className="flex-1 min-w-0">
                    <div className="flex items-center gap-2 mb-2 flex-wrap">
                      <h1 className="text-3xl font-black uppercase text-teal-400" style={{ fontFamily: 'Impact, "Arial Black", sans-serif' }}>
                        {crew.name}
                      </h1>
                      <Badge variant="outline" className="gap-1 text-teal-400 border-teal-500/40">
                        <Users className="h-3 w-3" /> Crew
                      </Badge>
                      <CrewNip05Badge nip05={crew.nip05} founderPubkey={crew.pubkey} />
                      <CrewRepBadge crew={crew} />
                    </div>
                    <div className="flex flex-wrap items-center gap-3 text-sm text-gray-400">
                      {crew.location && (
                        <span className="flex items-center gap-1">
                          <MapPin className="h-4 w-4 text-teal-400" /> {crew.location}
                        </span>
                      )}
                      {crew.founded && (
                        <span className="flex items-center gap-1">
                          <Calendar className="h-4 w-4" /> Since {crew.founded}
                        </span>
                      )}
                    </div>
                  </div>
                  <div className="flex flex-col items-end gap-2">
                    {canManage && (
                      <CrewInviteDialog
                        crewName={crew.name}
                        founderPubkey={crew.pubkey}
                        identifier={crew.identifier}
                        isFounder={isFounder}
                      />
                    )}
                    {isFounder && (
                      <div className="flex items-center gap-2">
                        <Link to={`/edit-crew/${crew.pubkey}/${crew.identifier}`}>
                          <Button variant="outline" size="sm" className="gap-1.5 border-teal-500/40 text-teal-400 hover:bg-teal-500/10">
                            <Edit className="h-3.5 w-3.5" /> Edit
                          </Button>
                        </Link>
                        <DeleteEntityDialog
                          event={crew.event}
                          entityLabel="crew"
                          entityName={crew.name}
                          redirectTo="/crews"
                          triggerText="Disband"
                        />
                      </div>
                    )}
                    {isAdmin && !isFounder && (
                      <Badge className="gap-1 bg-teal-500/20 text-teal-300 border-0">
                        <ShieldCheck className="h-3 w-3" /> You're an admin
                      </Badge>
                    )}
                    {role === 'member' && (
                      <Badge variant="outline" className="gap-1 border-teal-500/30 text-teal-400">
                        <Users className="h-3 w-3" /> Member
                      </Badge>
                    )}
                    {role === 'none' && (
                      <CrewRequestToJoin
                        crewName={crew.name}
                        founderPubkey={crew.pubkey}
                        admins={crew.admins}
                      />
                    )}
                  </div>
                </div>

                {crew.bio && (
                  <p className="text-gray-300 whitespace-pre-wrap mb-4">{crew.bio}</p>
                )}

                {crew.vibes.length > 0 && (
                  <div className="flex flex-wrap gap-2">
                    {crew.vibes.map((v) => (
                      <Badge key={v} className="bg-teal-500/15 text-teal-300 border-teal-500/30">
                        {CREW_VIBE_LABELS[v] || v}
                      </Badge>
                    ))}
                  </div>
                )}
              </CardContent>
            </Card>

            {/* Open call — looking for filmers/editors/members (Lab pipeline) */}
            <CrewLookingForCard lookingFor={crew.lookingFor} />

            {/* Crew treasury — transparent, zap-funded NIP-75 goal */}
            {crew.goalRef && <CrewTreasuryCard goalId={crew.goalRef} />}

            {/* Crew-hosted events (jams / comps / meetups) */}
            {((crewEvents && crewEvents.length > 0) || canManage) && (
              <Card className="bg-black/90 border-2 border-[#ccff00]/20">
                <CardHeader className="flex flex-row items-center justify-between gap-2 space-y-0">
                  <CardTitle className="flex items-center gap-2 text-lg font-black uppercase text-white">
                    <Calendar className="h-5 w-5 text-[#ccff00]" /> Crew Events
                  </CardTitle>
                  {canManage && (
                    <Link to={`/create-event?crew=${crew.pubkey}:${crew.identifier}`}>
                      <Button size="sm" className="gap-1.5 bg-[#ccff00] font-bold text-black hover:bg-[#ccff00]/90">
                        <Calendar className="h-3.5 w-3.5" /> Host a jam
                      </Button>
                    </Link>
                  )}
                </CardHeader>
                <CardContent className="space-y-3">
                  {crewEvents && crewEvents.length > 0 ? (
                    crewEvents.slice(0, 5).map((ev) => (
                      <EventCard key={ev.id} event={ev} compact />
                    ))
                  ) : (
                    <p className="py-4 text-center text-sm text-gray-500">
                      No crew events yet. Host a jam, comp or meetup as the crew — it connects your
                      crew to the events calendar and lets people zap it.
                    </p>
                  )}
                </CardContent>
              </Card>
            )}

            {/* Crew feed */}
            <Card className="bg-black/90 border-2 border-white/5">
              <CardHeader>
                <CardTitle className="flex items-center gap-2 text-lg font-black uppercase text-white">
                  <MessageSquare className="h-5 w-5 text-teal-400" /> Crew Feed
                </CardTitle>
              </CardHeader>
              <CardContent className="space-y-3">
                {feedLoading ? (
                  Array.from({ length: 3 }).map((_, i) => (
                    <div key={i} className="rounded-xl border border-white/5 bg-black/40 p-3 space-y-2">
                      <Skeleton className="h-4 w-32" />
                      <Skeleton className="h-4 w-full" />
                      <Skeleton className="h-4 w-3/4" />
                    </div>
                  ))
                ) : (() => {
                  // Moderators still see hidden posts (greyed via the badge on hide),
                  // but for everyone the hidden set is filtered out.
                  const visible = (feed ?? []).filter(
                    (ev) => canManage || !hiddenIds?.has(ev.id),
                  );
                  if (visible.length === 0) {
                    return (
                      <p className="text-sm text-gray-500 py-4 text-center">
                        No recent posts from the crew yet.
                      </p>
                    );
                  }
                  return visible.map((ev) => (
                    <div key={ev.id} className={cn(hiddenIds?.has(ev.id) && 'opacity-50')}>
                      {hiddenIds?.has(ev.id) && (
                        <p className="mb-1 flex items-center gap-1 text-[11px] font-bold uppercase text-red-400">
                          <EyeOff className="h-3 w-3" /> Hidden from feed
                        </p>
                      )}
                      <FeedItem
                        event={ev}
                        canModerate={canManage && !hiddenIds?.has(ev.id)}
                        onHide={handleHidePost}
                        isHiding={isHiding}
                      />
                    </div>
                  ));
                })()}
              </CardContent>
            </Card>

            {/* Crew Agent — AI guide, shown when the crew enabled it */}
            {crew.agentEnabled && (
              <button
                type="button"
                onClick={() => setAgentOpen(true)}
                className="group flex w-full items-center gap-3 rounded-2xl border-2 border-teal-500/30 bg-gradient-to-br from-teal-500/10 to-transparent p-4 text-left transition-all hover:border-teal-500/60 hover:from-teal-500/15 active:scale-[0.99]"
              >
                <div className="flex h-12 w-12 flex-shrink-0 items-center justify-center rounded-2xl bg-teal-500/15 text-2xl">
                  🐝
                </div>
                <div className="min-w-0 flex-1">
                  <p className="flex items-center gap-2 font-black text-white">
                    Ask Sasquatch
                    <span className="rounded-full bg-teal-500/15 px-1.5 py-0.5 text-[10px] font-bold uppercase text-teal-300">
                      Crew Agent
                    </span>
                  </p>
                  <p className="text-xs text-gray-400">
                    Your crew's AI guide — nearby spots, events, coaches & gear, with live data.
                  </p>
                </div>
                <MessageSquare className="h-5 w-5 flex-shrink-0 text-teal-400/60 group-hover:text-teal-400" />
              </button>
            )}

            {/* Crew Chat — private E2E-encrypted group chat for members */}
            <CrewChat
              crewName={crew.name}
              founderPubkey={crew.pubkey}
              members={crew.members}
              admins={crew.admins}
              crewCoord={crewCoord}
              canModerate={canManage}
            />
          </div>

          {/* Sidebar */}
          <div className="space-y-6">
            {/* Founder / links / support */}
            <Card className="bg-black/90 border-2 border-teal-500/40">
              <CardHeader>
                <CardTitle className="text-lg text-teal-400 uppercase font-black flex items-center gap-2">
                  <Users className="h-5 w-5" /> Crew
                </CardTitle>
              </CardHeader>
              <CardContent className="space-y-3">
                <Link to={`/${npub}`} className="flex items-center gap-2 text-sm text-gray-300 p-2 bg-black/50 rounded hover:bg-black/70 transition-colors">
                  <Avatar className="h-6 w-6">
                    <AvatarImage src={author.data?.metadata?.picture} alt={founderName} />
                    <AvatarFallback className="text-[10px]">{founderName.slice(0, 2).toUpperCase()}</AvatarFallback>
                  </Avatar>
                  <span className="truncate">Started by {founderName}</span>
                </Link>

                {sanitizeUrl(crew.website) && (
                  <a href={sanitizeUrl(crew.website)!} target="_blank" rel="noopener noreferrer" className="flex items-center gap-2 text-sm text-gray-300 p-2 bg-black/50 rounded hover:bg-black/70 transition-colors" title={`Opens: ${urlDomain(crew.website!)}`}>
                    <Globe className="h-4 w-4 text-teal-400" />
                    <span className="truncate">{urlDomain(crew.website!)}</span>
                  </a>
                )}

                {crew.instagram && (
                  <a href={`https://instagram.com/${crew.instagram.replace('@', '')}`} target="_blank" rel="noopener noreferrer" className="flex items-center gap-2 text-sm text-gray-300 p-2 bg-black/50 rounded hover:bg-black/70 transition-colors">
                    <Instagram className="h-4 w-4 text-teal-400" />
                    <span className="truncate">@{crew.instagram.replace('@', '')}</span>
                  </a>
                )}

                {crew.socials.map((s, i) => {
                  const url = sanitizeUrl(s);
                  return url ? (
                    <a
                      key={`${s}-${i}`}
                      href={url}
                      target="_blank"
                      rel="noopener noreferrer"
                      className="flex items-center gap-2 text-sm text-gray-300 p-2 bg-black/50 rounded hover:bg-black/70 transition-colors"
                      title={`Opens: ${urlDomain(s)}`}
                    >
                      <Globe className="h-4 w-4 text-teal-400" />
                      <span className="truncate">{urlDomain(s)}</span>
                    </a>
                  ) : (
                    <div
                      key={`${s}-${i}`}
                      className="flex items-center gap-2 text-sm text-gray-300 p-2 bg-black/50 rounded"
                    >
                      <Globe className="h-4 w-4 text-teal-400" />
                      <span className="truncate">{s}</span>
                    </div>
                  );
                })}

                <div className="pt-3 border-t border-gray-700 space-y-2">
                  {/* Zap the whole crew — split across founder + confirmed members */}
                  {crewZapRecipients.length > 1 && (
                    <ZapCrewDialog crewName={crew.name} recipients={crewZapRecipients}>
                      <Button className="w-full justify-center gap-2 bg-teal-500 hover:bg-teal-600 font-bold">
                        <Users className="h-4 w-4" />
                        <Zap className="h-4 w-4" />
                        Zap the Crew
                      </Button>
                    </ZapCrewDialog>
                  )}
                  <ZapButton target={crew.event} className="w-full justify-center" />
                  {crew.noffer && (
                    <ClinkPayButton noffer={crew.noffer} recipientName={crew.name} className="w-full justify-center" />
                  )}
                </div>
              </CardContent>
            </Card>

            {/* Members */}
            {hasMembers && (
              <CollectiveMembers
                kind={SKATE_CREW_KIND}
                founderPubkey={crew.pubkey}
                identifier={crew.identifier}
                claimedMembers={crew.members}
                admins={crew.admins}
                accentText="text-teal-400"
                accentBorder="border-teal-500/40"
              />
            )}

            {/* Linked Lab profiles — hire this crew */}
            <LinkedLabCard labRefs={crew.labRefs} />

            {/* Home spots */}
            {crew.spotRefs.length > 0 && (
              <Card className="bg-black/90 border-2 border-white/5">
                <CardHeader>
                  <CardTitle className="text-lg text-white uppercase font-black flex items-center gap-2">
                    <MapPin className="h-5 w-5 text-teal-400" /> Home Spots
                  </CardTitle>
                </CardHeader>
                <CardContent className="space-y-2">
                  {crew.spotRefs.map((ref) => {
                    const [, spotPubkey, spotD] = ref.split(':');
                    return (
                      <Link
                        key={ref}
                        to={`/spot/${spotPubkey}/${spotD}`}
                        className="flex items-center gap-2 text-sm text-gray-300 p-2 bg-black/50 rounded hover:bg-black/70 transition-colors"
                      >
                        <span className="text-base">🛹</span>
                        <span className="truncate">View spot</span>
                      </Link>
                    );
                  })}
                  <Link to="/" className="block text-center text-xs text-teal-400 hover:text-teal-300 pt-1">
                    See on the map →
                  </Link>
                </CardContent>
              </Card>
            )}
          </div>
        </div>
      </div>

      {/* Crew Agent chat panel */}
      {crew.agentEnabled && (
        <CrewAgentPanel
          open={agentOpen}
          onOpenChange={setAgentOpen}
          ctx={{ crewName: crew.name, location: crew.location, city: crew.location }}
        />
      )}
    </Layout>
  );
}