import { nip19 } from 'nostr-tools';
import { useParams, Link } from 'react-router-dom';
import { Layout } from '@/components/Layout';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Avatar, AvatarImage, AvatarFallback } from '@/components/ui/avatar';
import { Badge } from '@/components/ui/badge';
import { Skeleton } from '@/components/ui/skeleton';
import { ZapButton } from '@/components/ZapButton';
import { useAuthor } from '@/hooks/useAuthor';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { useUserSkateSpots } from '@/hooks/useSkateSpots';
import { useUserShops } from '@/hooks/useShops';
import { SpotCard, SpotCardSkeleton } from '@/components/SpotCard';
import { genUserName } from '@/lib/genUserName';
import NotFound from './NotFound';
import {
  MapPin,
  Store,
  MessageCircle,
  Globe,
  Zap,
  Calendar,
  ExternalLink,
  ArrowLeft,
  Copy,
  Check,
} from 'lucide-react';
import { useState } from 'react';
import { UserStatusIndicator } from '@/components/UserStatusIndicator';

function ProfilePage({ pubkey }: { pubkey: string }) {
  const author = useAuthor(pubkey);
  const { user } = useCurrentUser();
  const { data: spots, isLoading: spotsLoading } = useUserSkateSpots(pubkey);
  const { data: shops, isLoading: shopsLoading } = useUserShops(pubkey);
  const [copied, setCopied] = useState(false);

  const metadata = author.data?.metadata;
  const displayName = metadata?.name ?? genUserName(pubkey);
  const avatar = metadata?.picture;
  const banner = metadata?.banner;
  const about = metadata?.about;
  const website = metadata?.website;
  const nip05 = metadata?.nip05;
  const lud16 = metadata?.lud16;

  const npub = nip19.npubEncode(pubkey);
  const isOwnProfile = user?.pubkey === pubkey;

  const handleCopyNpub = () => {
    navigator.clipboard.writeText(npub);
    setCopied(true);
    setTimeout(() => setCopied(false), 2000);
  };

  // Create a mock event for zapping
  const profileEvent = author.data?.event;

  if (author.isLoading) {
    return (
      <Layout>
        <div className="container px-4 py-8 max-w-4xl">
          <Skeleton className="h-48 w-full rounded-xl mb-4" />
          <div className="flex items-end gap-4 -mt-16 px-4 mb-6">
            <Skeleton className="h-32 w-32 rounded-full border-4 border-black" />
            <div className="flex-1 space-y-2 pb-2">
              <Skeleton className="h-8 w-48" />
              <Skeleton className="h-4 w-32" />
            </div>
          </div>
          <div className="space-y-4">
            <Skeleton className="h-20 w-full" />
            <div className="grid grid-cols-2 gap-4">
              <Skeleton className="h-24" />
              <Skeleton className="h-24" />
            </div>
          </div>
        </div>
      </Layout>
    );
  }

  return (
    <Layout>
      <div className="container px-4 py-6 max-w-4xl">
        {/* Back Button */}
        <Link
          to="/bounties"
          className="inline-flex items-center text-gray-400 hover:text-white transition-colors mb-4"
        >
          <ArrowLeft className="h-4 w-4 mr-2" />
          Back to Leaderboard
        </Link>

        {/* Banner */}
        <div className="relative h-32 sm:h-48 rounded-xl overflow-hidden bg-gradient-to-br from-[#ff0040]/30 to-[#ccff00]/20 mb-4">
          {banner && (
            <img src={banner} alt="Banner" className="w-full h-full object-cover" />
          )}
          <div className="absolute inset-0 bg-gradient-to-t from-black/60 to-transparent" />
        </div>

        {/* Profile Header */}
        <div className="flex flex-col sm:flex-row items-center sm:items-end gap-4 -mt-16 sm:-mt-20 px-4 mb-6 relative z-10">
          <div className="relative">
            <Avatar className="h-28 w-28 sm:h-32 sm:w-32 border-4 border-black shadow-xl">
              <AvatarImage src={avatar} alt={displayName} />
              <AvatarFallback className="bg-[#ff0040]/20 text-[#ff0040] text-2xl sm:text-3xl font-black">
                {displayName.slice(0, 2).toUpperCase()}
              </AvatarFallback>
            </Avatar>
            {/* User Status Indicator */}
            <div className="absolute -bottom-1 -right-1">
              <UserStatusIndicator pubkey={pubkey} size="lg" showLabel />
            </div>
          </div>
          
          <div className="flex-1 text-center sm:text-left pb-2">
            <div className="flex items-center justify-center sm:justify-start gap-2 mb-1">
              <h1 className="text-2xl sm:text-3xl font-black uppercase text-white">
                {displayName}
              </h1>
              <UserStatusIndicator pubkey={pubkey} size="md" showLabel className="hidden sm:flex" />
            </div>
            {nip05 && (
              <p className="text-sm text-[#ccff00] font-medium flex items-center justify-center sm:justify-start gap-1">
                <Check className="h-3 w-3" />
                {nip05}
              </p>
            )}
          </div>

          {/* Actions */}
          <div className="flex items-center gap-2">
            {!isOwnProfile && user && (
              <Link to={`/messages/${npub}`}>
                <Button variant="outline" className="gap-2 border-[#ff0040]/50 text-[#ff0040] hover:bg-[#ff0040]/10">
                  <MessageCircle className="h-4 w-4" />
                  <span className="hidden sm:inline">Message</span>
                </Button>
              </Link>
            )}
            {profileEvent && !isOwnProfile && (
              <ZapButton
                target={profileEvent}
                className="bg-[#ccff00] text-black hover:bg-[#ccff00]/90 font-bold"
              />
            )}
          </div>
        </div>

        {/* Profile Info */}
        <div className="grid lg:grid-cols-3 gap-6">
          {/* Main Content */}
          <div className="lg:col-span-2 space-y-6">
            {/* About */}
            {about && (
              <Card className="bg-black/90 border-2 border-gray-800">
                <CardContent className="p-4 sm:p-6">
                  <p className="text-gray-300 whitespace-pre-wrap">{about}</p>
                </CardContent>
              </Card>
            )}

            {/* Spots by this user */}
            <div>
              <div className="flex items-center justify-between mb-4">
                <h2 className="text-xl font-black uppercase flex items-center gap-2">
                  <MapPin className="h-5 w-5 text-[#ff0040]" />
                  Spots Added
                  {spots && spots.length > 0 && (
                    <Badge className="bg-[#ff0040]/20 text-[#ff0040] border-[#ff0040]/50">
                      {spots.length}
                    </Badge>
                  )}
                </h2>
              </div>

              {spotsLoading ? (
                <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                  {Array.from({ length: 2 }).map((_, i) => (
                    <SpotCardSkeleton key={i} />
                  ))}
                </div>
              ) : spots && spots.length > 0 ? (
                <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                  {spots.slice(0, 4).map((spot) => (
                    <SpotCard key={spot.id} spot={spot} />
                  ))}
                </div>
              ) : (
                <Card className="border-dashed border-2 border-gray-800">
                  <CardContent className="py-8 text-center">
                    <MapPin className="h-10 w-10 mx-auto mb-3 text-gray-600" />
                    <p className="text-gray-500">No spots added yet</p>
                  </CardContent>
                </Card>
              )}
            </div>

            {/* Shops by this user */}
            <div>
              <div className="flex items-center justify-between mb-4">
                <h2 className="text-xl font-black uppercase flex items-center gap-2">
                  <Store className="h-5 w-5 text-[#ccff00]" />
                  Shops Added
                  {shops && shops.length > 0 && (
                    <Badge className="bg-[#ccff00]/20 text-[#ccff00] border-[#ccff00]/50">
                      {shops.length}
                    </Badge>
                  )}
                </h2>
              </div>

              {shopsLoading ? (
                <div className="grid grid-cols-1 gap-3">
                  {Array.from({ length: 2 }).map((_, i) => (
                    <Skeleton key={i} className="h-20" />
                  ))}
                </div>
              ) : shops && shops.length > 0 ? (
                <div className="space-y-3">
                  {shops.slice(0, 4).map((shop) => (
                    <Link key={shop.id} to={`/shop/${shop.pubkey}/${shop.identifier}`}>
                      <Card className="bg-black/90 border-2 border-[#ccff00]/30 hover:border-[#ccff00]/60 transition-all">
                        <CardContent className="p-4 flex items-center gap-4">
                          <div className="w-12 h-12 rounded-lg bg-[#ccff00]/20 flex items-center justify-center flex-shrink-0">
                            <Store className="h-6 w-6 text-[#ccff00]" />
                          </div>
                          <div className="flex-1 min-w-0">
                            <h3 className="font-bold text-white truncate">{shop.name}</h3>
                            {shop.location && (
                              <p className="text-sm text-gray-400 truncate">{shop.location}</p>
                            )}
                          </div>
                        </CardContent>
                      </Card>
                    </Link>
                  ))}
                </div>
              ) : (
                <Card className="border-dashed border-2 border-gray-800">
                  <CardContent className="py-8 text-center">
                    <Store className="h-10 w-10 mx-auto mb-3 text-gray-600" />
                    <p className="text-gray-500">No shops added yet</p>
                  </CardContent>
                </Card>
              )}
            </div>
          </div>

          {/* Sidebar */}
          <div className="space-y-4">
            {/* Quick Info Card */}
            <Card className="bg-black/90 border-2 border-gray-800">
              <CardHeader className="pb-3">
                <CardTitle className="text-lg">Info</CardTitle>
              </CardHeader>
              <CardContent className="space-y-3">
                {website && (
                  <a
                    href={website.startsWith('http') ? website : `https://${website}`}
                    target="_blank"
                    rel="noopener noreferrer"
                    className="flex items-center gap-3 p-3 rounded-lg bg-gray-900 hover:bg-gray-800 transition-colors"
                  >
                    <Globe className="h-4 w-4 text-blue-400" />
                    <span className="text-gray-300 text-sm truncate">
                      {website.replace(/^https?:\/\//, '')}
                    </span>
                    <ExternalLink className="h-3 w-3 text-gray-500 ml-auto flex-shrink-0" />
                  </a>
                )}

                {lud16 && (
                  <div className="flex items-center gap-3 p-3 rounded-lg bg-gray-900">
                    <Zap className="h-4 w-4 text-yellow-400" />
                    <span className="text-gray-300 text-sm truncate">{lud16}</span>
                  </div>
                )}

                {/* Npub Copy */}
                <button
                  onClick={handleCopyNpub}
                  className="flex items-center gap-3 p-3 rounded-lg bg-gray-900 hover:bg-gray-800 transition-colors w-full text-left"
                >
                  {copied ? (
                    <Check className="h-4 w-4 text-green-400" />
                  ) : (
                    <Copy className="h-4 w-4 text-gray-400" />
                  )}
                  <span className="text-gray-400 text-sm truncate flex-1">
                    {copied ? 'Copied!' : `${npub.slice(0, 12)}...${npub.slice(-8)}`}
                  </span>
                </button>
              </CardContent>
            </Card>

            {/* Stats Card */}
            <Card className="bg-gradient-to-br from-[#ff0040]/10 to-[#ccff00]/10 border-2 border-[#ff0040]/30">
              <CardContent className="p-4">
                <h3 className="text-sm font-bold uppercase text-gray-400 mb-3">Contributions</h3>
                <div className="grid grid-cols-2 gap-3">
                  <div className="text-center p-3 rounded-lg bg-black/40">
                    <p className="text-2xl font-black text-[#ff0040]">{spots?.length || 0}</p>
                    <p className="text-xs text-gray-500 uppercase">Spots</p>
                  </div>
                  <div className="text-center p-3 rounded-lg bg-black/40">
                    <p className="text-2xl font-black text-[#ccff00]">{shops?.length || 0}</p>
                    <p className="text-xs text-gray-500 uppercase">Shops</p>
                  </div>
                </div>
              </CardContent>
            </Card>

            {/* Tip Card */}
            {!isOwnProfile && profileEvent && (
              <Card className="bg-gradient-to-br from-[#ccff00]/10 to-transparent border-2 border-[#ccff00]/30">
                <CardContent className="p-4 text-center">
                  <Zap className="h-8 w-8 mx-auto mb-2 text-[#ccff00]" />
                  <h3 className="font-bold text-white mb-1">Support this mapper</h3>
                  <p className="text-xs text-gray-400 mb-3">
                    Send a zap to thank them for their contributions
                  </p>
                  <ZapButton
                    target={profileEvent}
                    className="w-full justify-center bg-[#ccff00] text-black hover:bg-[#ccff00]/90 font-bold"
                  />
                </CardContent>
              </Card>
            )}
          </div>
        </div>
      </div>
    </Layout>
  );
}

export function NIP19Page() {
  const { nip19: identifier } = useParams<{ nip19: string }>();

  if (!identifier) {
    return <NotFound />;
  }

  let decoded;
  try {
    decoded = nip19.decode(identifier);
  } catch {
    return <NotFound />;
  }

  const { type, data } = decoded;

  switch (type) {
    case 'npub':
      return <ProfilePage pubkey={data as string} />;

    case 'nprofile':
      return <ProfilePage pubkey={(data as { pubkey: string }).pubkey} />;

    case 'note':
      // AI agent should implement note view here
      return <NotFound />;

    case 'nevent':
      // AI agent should implement event view here
      return <NotFound />;

    case 'naddr':
      // AI agent should implement addressable event view here
      return <NotFound />;

    default:
      return <NotFound />;
  }
}