import { useMemo, useState } from 'react';
import { useSeoMeta } from '@unhead/react';
import { useParams, Link, useNavigate } from 'react-router-dom';
import { useQueryClient } from '@tanstack/react-query';
import ngeohash from 'ngeohash';
import { Layout } from '@/components/Layout';
import { SpotMap } from '@/components/SpotMap';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Badge } from '@/components/ui/badge';
import { Avatar, AvatarFallback, AvatarImage } from '@/components/ui/avatar';
import { Skeleton } from '@/components/ui/skeleton';
import { Button } from '@/components/ui/button';
import { ZapButton } from '@/components/ZapButton';
import { ClinkPayButton } from '@/components/ClinkPayButton';
import { CommentsSection } from '@/components/comments/CommentsSection';
import { sanitizeUrl, sanitizeTel, sanitizeEmail, urlDomain } from '@/lib/sanitizeUrl';
import { OfficialBadge } from '@/components/OfficialBadge';
import { useShop } from '@/hooks/useShops';
import { useAuthor } from '@/hooks/useAuthor';
import { useDeleteEntity } from '@/hooks/useDeleteEntity';
import { isAdminPubkey } from '@/lib/admins';
import { cn } from '@/lib/utils';
import { useToast } from '@/hooks/useToast';
import { genUserName } from '@/lib/genUserName';
import NotFound from './NotFound';
import {
  Store,
  ArrowLeft,
  Share2,
  Navigation,
  Calendar,
  Pencil,
  Trash2,
  AlertTriangle,
  Shield,
  Phone,
  Mail,
  Globe,
  Instagram,
  Clock,
  CheckCircle2,
} from 'lucide-react';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
} from '@/components/ui/alert-dialog';

function ShopDetailSkeleton() {
  return (
    <Layout>
      <div className="container px-4 py-8">
        <div className="grid lg:grid-cols-3 gap-8">
          <div className="lg:col-span-2 space-y-6">
            <Skeleton className="aspect-video w-full rounded-xl" />
            <div className="space-y-4">
              <Skeleton className="h-10 w-3/4" />
              <Skeleton className="h-6 w-1/2" />
              <Skeleton className="h-24 w-full" />
            </div>
          </div>
          <div className="space-y-6">
            <Skeleton className="h-64 w-full rounded-xl" />
            <Skeleton className="h-32 w-full rounded-xl" />
          </div>
        </div>
      </div>
    </Layout>
  );
}

export default function ShopDetailPage() {
  const { pubkey, identifier } = useParams<{ pubkey: string; identifier: string }>();
  const { data: shop, isLoading, error } = useShop(identifier || '', pubkey);
  const author = useAuthor(shop?.pubkey);
  const { user } = useCurrentUser();
  const { mutateAsync: deleteEntity } = useDeleteEntity();
  const { toast } = useToast();
  const navigate = useNavigate();
  const queryClient = useQueryClient();
  const [showDeleteDialog, setShowDeleteDialog] = useState(false);

  const isOwner = user && shop && user.pubkey === shop.pubkey;
  const isAdmin = isAdminPubkey(user?.pubkey);
  // Owner can delete their own shop; a SkateSpots admin can take down any shop.
  const canDelete = !!user && !!shop && (isOwner || isAdmin);
  const adminTakedown = isAdmin && !isOwner;
  const hasNip05 = user?.metadata?.nip05;

  useSeoMeta({
    title: shop ? `${shop.name} - SkateSpots` : 'Skate Shop - SkateSpots',
    description: shop?.description || 'View this skate shop on SkateSpots.',
  });

  const metadata = author.data?.metadata;
  const displayName = metadata?.name ?? genUserName(shop?.pubkey || '');

  const coordinates = useMemo(() => {
    if (!shop?.geohash) return null;
    const { latitude, longitude } = ngeohash.decode(shop.geohash);
    return { lat: latitude, lng: longitude };
  }, [shop?.geohash]);

  // Check if shop owner's NIP-05 domain matches website domain
  const isVerifiedOwner = useMemo(() => {
    if (!metadata?.nip05 || !shop?.website) return false;
    
    const nip05Domain = metadata.nip05.split('@')[1];
    const websiteDomain = shop.website.replace(/^https?:\/\/(www\.)?/, '').split('/')[0];
    
    return nip05Domain.toLowerCase() === websiteDomain.toLowerCase();
  }, [metadata?.nip05, shop?.website]);

  const handleShare = async () => {
    if (navigator.share) {
      try {
        await navigator.share({
          title: shop?.name,
          text: shop?.description || `Check out this skate shop: ${shop?.name}`,
          url: window.location.href,
        });
      } catch {
        // User cancelled or share failed
      }
    } else {
      navigator.clipboard.writeText(window.location.href);
      toast({
        title: 'Link copied!',
        description: 'Shop link copied to clipboard.',
      });
    }
  };

  const handleDirections = () => {
    if (coordinates) {
      window.open(
        `https://www.google.com/maps/dir/?api=1&destination=${coordinates.lat},${coordinates.lng}`,
        '_blank'
      );
    }
  };

  const handleDelete = async () => {
    if (!shop || !user) return;

    try {
      // Routes through useDeleteEntity: owner → NIP-09 delete; admin → NIP-09
      // delete + a moderation label so the shop is hidden across the app.
      await deleteEntity({
        event: shop.event,
        reason: adminTakedown ? `SkateSpots admin removed shop "${shop.name}"` : 'Deleted shop',
      });

      setShowDeleteDialog(false);
      toast({
        title: adminTakedown ? 'Shop removed' : 'Shop deleted',
        description: adminTakedown
          ? 'This shop has been taken down and will be hidden across SkateSpots.'
          : 'Deletion request sent to relays. Most relays will remove this content.',
      });

      queryClient.invalidateQueries({ queryKey: ['skate-shops'] });
      queryClient.invalidateQueries({ queryKey: ['skate-shop', shop.identifier, shop.pubkey] });
      queryClient.invalidateQueries({ queryKey: ['user-skate-shops', user.pubkey] });

      setTimeout(() => navigate('/map'), 1000);
    } catch (error) {
      toast({
        title: 'Delete failed',
        description: error instanceof Error ? error.message : 'Something went wrong',
        variant: 'destructive',
      });
      setShowDeleteDialog(false);
    }
  };

  if (isLoading) {
    return <ShopDetailSkeleton />;
  }

  if (error || !shop) {
    return <NotFound />;
  }

  // Create a fake SkateSpot for the map component
  const spotForMap = {
    ...shop,
    title: shop.name,
    types: ['shop'],
    accessType: undefined,
    contactInfo: undefined,
  };

  return (
    <Layout>
      <div className="container px-4 py-8">
        {/* Back link */}
        <Link
          to="/map"
          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 Map
        </Link>

        <div className="grid lg:grid-cols-3 gap-8">
          {/* Main Content */}
          <div className="lg:col-span-2 space-y-6">
            {/* Image Gallery */}
            {shop.images.length > 0 ? (
              <div className="aspect-video rounded-xl overflow-hidden bg-muted">
                <img
                  src={shop.images[0]}
                  alt={shop.name}
                  className="w-full h-full object-cover"
                />
              </div>
            ) : (
              <div className="aspect-video rounded-xl bg-gradient-to-br from-[#ccff00]/20 to-[#00ff88]/20 flex items-center justify-center">
                <Store className="h-16 w-16 text-[#ccff00]/40" />
              </div>
            )}

            {/* Additional images */}
            {shop.images.length > 1 && (
              <div className="grid grid-cols-4 gap-2">
                {shop.images.slice(1, 5).map((img, idx) => (
                  <div key={idx} className="aspect-square rounded-lg overflow-hidden bg-muted">
                    <img src={img} alt={`${shop.name} ${idx + 2}`} className="w-full h-full object-cover" />
                  </div>
                ))}
              </div>
            )}

            {/* Shop Info */}
            <div className="space-y-4">
              <div className="flex items-start justify-between gap-4">
                <div className="flex-1">
                  <div className="flex items-center gap-3 mb-2">
                    <h1 className="text-3xl font-black uppercase neon-lime" style={{
                      fontFamily: 'Impact, "Arial Black", sans-serif'
                    }}>{shop.name}</h1>
                    {isVerifiedOwner && (
                      <Badge className="bg-blue-500/20 text-blue-400 border border-blue-500/50">
                        <CheckCircle2 className="h-3 w-3 mr-1" />
                        Verified
                      </Badge>
                    )}
                    <OfficialBadge pubkey={shop.pubkey} size="md" />
                  </div>
                  {shop.location && (
                    <p className="text-muted-foreground flex items-center gap-2">
                      <Store className="h-4 w-4" />
                      {shop.location}
                    </p>
                  )}
                </div>
                <div className="flex items-center gap-2">
                  {isOwner && (
                    <Link to={`/edit-shop/${shop.pubkey}/${shop.identifier}`}>
                      <Button variant="outline" size="icon">
                        <Pencil className="h-4 w-4" />
                      </Button>
                    </Link>
                  )}
                  {canDelete && (
                    <Button
                      variant="outline"
                      size="icon"
                      onClick={() => setShowDeleteDialog(true)}
                      title={adminTakedown ? 'Remove (admin)' : 'Delete'}
                      className={cn(
                        'hover:bg-destructive hover:text-destructive-foreground',
                        adminTakedown && 'border-red-500/50 text-red-400',
                      )}
                    >
                      <Trash2 className="h-4 w-4" />
                    </Button>
                  )}
                  <Button variant="outline" size="icon" onClick={handleShare}>
                    <Share2 className="h-4 w-4" />
                  </Button>
                  <Button variant="outline" size="icon" onClick={handleDirections}>
                    <Navigation className="h-4 w-4" />
                  </Button>
                </div>
              </div>

              {/* Hours */}
              {shop.hours && (
                <Card className="bg-black/90 border-2 border-gray-700">
                  <CardContent className="p-4">
                    <div className="flex items-center gap-3">
                      <Clock className="h-5 w-5 text-[#ccff00]" />
                      <div>
                        <p className="text-sm text-gray-400">Hours</p>
                        <p className="text-white font-medium">{shop.hours}</p>
                      </div>
                    </div>
                  </CardContent>
                </Card>
              )}

              {/* Claim Shop Notice */}
              {!isOwner && user && (
                <Card className="bg-[#ccff00]/10 border-2 border-[#ccff00]/50">
                  <CardContent className="p-6">
                    <div className="flex items-start gap-3">
                      <div className="text-2xl">🏪</div>
                      <div className="flex-1">
                        <h3 className="font-bold text-[#ccff00] mb-2 uppercase">Are You the Shop Owner?</h3>
                        <p className="text-sm text-gray-300 mb-4">
                          If you own or manage this shop, you can claim it to verify ownership using NIP-05.
                        </p>
                        {hasNip05 ? (
                          <div>
                            <p className="text-xs text-gray-400 mb-3">
                              To claim this shop, add a NIP-05 identifier that matches the shop's website domain.
                              For example, if the shop website is <code className="bg-black/50 px-1 rounded">supremenewyork.com</code>,
                              your NIP-05 should be <code className="bg-black/50 px-1 rounded">you@supremenewyork.com</code>
                            </p>
                            <Link to="/settings">
                              <Button className="gap-2 bg-[#ccff00] text-black hover:bg-[#ccff00]/90 font-bold uppercase w-full">
                                <Shield className="h-4 w-4" />
                                Update NIP-05 to Claim
                              </Button>
                            </Link>
                          </div>
                        ) : (
                          <div>
                            <p className="text-xs text-yellow-400 mb-2">⚠️ NIP-05 verification required to claim shops</p>
                            <Link to="/settings">
                              <Button variant="outline" size="sm" className="border-yellow-500/50 hover:bg-yellow-500/10 text-yellow-400 font-bold">
                                Add NIP-05 in Settings
                              </Button>
                            </Link>
                          </div>
                        )}
                      </div>
                    </div>
                  </CardContent>
                </Card>
              )}

              {/* Description */}
              {shop.description && (
                <Card className="bg-black/90 border-2 border-gray-700">
                  <CardContent className="pt-6">
                    <p className="whitespace-pre-wrap text-gray-300">{shop.description}</p>
                  </CardContent>
                </Card>
              )}

              {/* Comments Section */}
              {shop.event && <CommentsSection root={shop.event} />}
            </div>
          </div>

          {/* Sidebar */}
          <div className="space-y-6">
            {/* Contact Card */}
            {(shop.phone || shop.email || shop.website || shop.instagram) && (
              <Card className="bg-[#ccff00]/10 border-2 border-[#ccff00]/50">
                <CardHeader className="pb-3">
                  <CardTitle className="text-lg text-[#ccff00] uppercase font-black flex items-center gap-2">
                    <Phone className="h-5 w-5" />
                    Contact Shop
                  </CardTitle>
                </CardHeader>
                <CardContent className="space-y-2">
                  {sanitizeTel(shop.phone) && (
                    <a href={sanitizeTel(shop.phone)!} className="flex items-center gap-3 p-3 bg-black/50 rounded-lg hover:bg-black/70 transition-colors">
                      <Phone className="h-4 w-4 text-[#ccff00]" />
                      <span className="text-gray-300">{shop.phone}</span>
                    </a>
                  )}
                  {sanitizeEmail(shop.email) && (
                    <a href={sanitizeEmail(shop.email)!} className="flex items-center gap-3 p-3 bg-black/50 rounded-lg hover:bg-black/70 transition-colors">
                      <Mail className="h-4 w-4 text-[#ccff00]" />
                      <span className="text-gray-300 truncate">{shop.email}</span>
                    </a>
                  )}
                  {sanitizeUrl(shop.website) && (
                    <a href={sanitizeUrl(shop.website)!} target="_blank" rel="noopener noreferrer" className="flex items-center gap-3 p-3 bg-black/50 rounded-lg hover:bg-black/70 transition-colors" title={`Opens: ${urlDomain(shop.website!)}`}>
                      <Globe className="h-4 w-4 text-[#ccff00]" />
                      <span className="text-gray-300 truncate">{urlDomain(shop.website!)}</span>
                    </a>
                  )}
                  {shop.instagram && (
                    <a href={`https://instagram.com/${shop.instagram.replace('@', '')}`} target="_blank" rel="noopener noreferrer" className="flex items-center gap-3 p-3 bg-black/50 rounded-lg hover:bg-black/70 transition-colors">
                      <Instagram className="h-4 w-4 text-[#ccff00]" />
                      <span className="text-gray-300">@{shop.instagram.replace('@', '')}</span>
                    </a>
                  )}
                </CardContent>
              </Card>
            )}

            {/* Map */}
            <Card>
              <CardHeader className="pb-3">
                <CardTitle className="text-lg flex items-center gap-2">
                  <Store className="h-5 w-5 text-[#ccff00]" />
                  Location
                </CardTitle>
              </CardHeader>
              <CardContent>
                <div className="aspect-square rounded-lg overflow-hidden">
                  <SpotMap
                    spots={[spotForMap as any]}
                    center={coordinates ? [coordinates.lat, coordinates.lng] : undefined}
                    zoom={15}
                    className="h-full"
                  />
                </div>
                {coordinates && (
                  <Button
                    variant="outline"
                    className="w-full mt-4 gap-2"
                    onClick={handleDirections}
                  >
                    <Navigation className="h-4 w-4" />
                    Get Directions
                  </Button>
                )}
              </CardContent>
            </Card>

            {/* Added By Card with Tip the Mapper */}
            <Card className="bg-gradient-to-br from-[#ccff00]/5 to-orange-500/5 border-2 border-[#ccff00]/30">
              <CardHeader className="pb-3">
                <CardTitle className="text-lg flex items-center gap-2">
                  <span className="text-[#ccff00]">⚡</span>
                  Tip the Mapper
                </CardTitle>
              </CardHeader>
              <CardContent>
                <div className="flex items-center gap-3 mb-4">
                  <Avatar className="h-12 w-12 border-2 border-[#ccff00]/30">
                    <AvatarImage src={metadata?.picture} alt={displayName} />
                    <AvatarFallback className="bg-[#ccff00]/10 text-[#ccff00]">
                      {displayName.slice(0, 2).toUpperCase()}
                    </AvatarFallback>
                  </Avatar>
                  <div className="flex-1 min-w-0">
                    <p className="font-medium truncate">{displayName}</p>
                    <p className="text-sm text-muted-foreground flex items-center gap-1">
                      <Calendar className="h-3 w-3" />
                      {new Date(shop.createdAt * 1000).toLocaleDateString()}
                    </p>
                  </div>
                </div>

                <p className="text-xs text-gray-400 mb-3">
                  This shop was added by a community member. Zap them to say thanks!
                </p>

                <ZapButton
                  target={shop.event}
                  className="w-full justify-center bg-[#ccff00] text-black hover:bg-[#ccff00]/90 font-bold"
                />

                {/* CLINK self-custodial payment (only when the shop published a valid noffer) */}
                {shop.noffer && (
                  <div className="mt-3">
                    <ClinkPayButton
                      noffer={shop.noffer}
                      recipientName={shop.name}
                      className="w-full justify-center"
                    />
                  </div>
                )}
              </CardContent>
            </Card>
          </div>
        </div>
      </div>

      {/* Delete Confirmation Dialog */}
      <AlertDialog open={showDeleteDialog} onOpenChange={setShowDeleteDialog}>
        <AlertDialogContent className="bg-black border-2 border-red-500/50">
          <AlertDialogHeader>
            <AlertDialogTitle className="text-white flex items-center gap-2">
              <AlertTriangle className="h-5 w-5 text-red-500" />
              {adminTakedown ? 'Remove this shop? (admin)' : 'Delete Shop?'}
            </AlertDialogTitle>
            <AlertDialogDescription className="text-gray-300">
              {adminTakedown
                ? `As a SkateSpots admin you're taking down "${shop.name}". It will be hidden across the app for everyone and a deletion request will be sent to relays.`
                : `This will permanently delete "${shop.name}" from all relays. This action cannot be undone.`}
            </AlertDialogDescription>
          </AlertDialogHeader>
          <AlertDialogFooter>
            <AlertDialogCancel className="border-gray-600">Cancel</AlertDialogCancel>
            <AlertDialogAction
              onClick={handleDelete}
              className="bg-red-500 hover:bg-red-600 text-white"
            >
              {adminTakedown ? 'Remove Shop' : 'Delete Shop'}
            </AlertDialogAction>
          </AlertDialogFooter>
        </AlertDialogContent>
      </AlertDialog>
    </Layout>
  );
}