import { useState } from 'react';
import { Link, useNavigate } from 'react-router-dom';
import { nip19 } from 'nostr-tools';
import { Card, CardContent } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { Avatar, AvatarImage, AvatarFallback } from '@/components/ui/avatar';
import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip';
import { useAuthor } from '@/hooks/useAuthor';
import { useCurrentUser } from '@/hooks/useCurrentUser';
import { genUserName } from '@/lib/genUserName';
import { getSkateboardRating, getTrustLevel, SELLER_TRUST_BADGES } from '@/lib/skateboardRating';
import { GEAR_CONDITIONS, GEAR_CATEGORIES, PRICE_TYPES, formatPrice, type MarketplaceItem } from '@/lib/types';
import {
  MessageCircle,
  MapPin,
  Search,
  Tag,
  CheckCircle,
  ShieldCheck,
  AlertTriangle,
  MoreVertical,
  Flag,
} from 'lucide-react';
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from '@/components/ui/dropdown-menu';
import { ReportDialog } from '@/components/ReportDialog';
import { formatDistanceToNow } from 'date-fns';

interface GearSwapItemCardProps {
  item: MarketplaceItem;
  trustScore?: number;
  salesCount: number;
  isFollowing?: boolean;
}

export function GearSwapItemCard({ item, trustScore, salesCount, isFollowing }: GearSwapItemCardProps) {
  const { user } = useCurrentUser();
  const navigate = useNavigate();
  const author = useAuthor(item.pubkey);
  const metadata = author.data?.metadata;
  const displayName = metadata?.name ?? genUserName(item.pubkey);
  const avatar = metadata?.picture;
  const [showReportDialog, setShowReportDialog] = useState(false);

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

  // Format price display
  const priceDisplay = formatPrice(item.price, item.priceType);

  const timeAgo = formatDistanceToNow(new Date(item.createdAt * 1000), { addSuffix: true });

  const primaryImage = item.images[0];
  const isWTB = item.listingType === 'wtb';
  
  // Get condition info
  const conditionInfo = item.condition ? GEAR_CONDITIONS[item.condition] : null;
  
  // Get category label
  const categoryLabel = item.category?.find((c) => GEAR_CATEGORIES[c as keyof typeof GEAR_CATEGORIES])
    ? GEAR_CATEGORIES[item.category.find((c) => GEAR_CATEGORIES[c as keyof typeof GEAR_CATEGORIES]) as keyof typeof GEAR_CATEGORIES]
    : null;

  // Get price type label
  const priceTypeLabel = item.priceType ? PRICE_TYPES[item.priceType]?.label : null;

  // Skateboard rating for seller
  const sellerRating = getSkateboardRating(salesCount);
  
  // Trust level
  const trustLevel = getTrustLevel(trustScore);
  const trustBadge = SELLER_TRUST_BADGES[trustLevel];

  const isOwnListing = user?.pubkey === item.pubkey;

  return (
    <Card
      className={`bg-black/90 border-2 group cursor-pointer transition-all hover:scale-[1.02] ${
        isWTB
          ? 'border-blue-500/20 hover:border-blue-500/60 hover:shadow-[0_0_30px_rgba(59,130,246,0.2)]'
          : 'border-orange-500/20 hover:border-orange-500/60 hover:shadow-[0_0_30px_rgba(255,102,0,0.2)]'
      }`}
      onClick={() => navigate(`/messages/${npub}`)}
    >
      <CardContent className="p-0">
        {/* Image */}
        <div className="relative aspect-square overflow-hidden rounded-t-lg">
          {primaryImage ? (
            <img
              src={primaryImage}
              alt={item.title}
              className="w-full h-full object-cover transition-transform group-hover:scale-105"
            />
          ) : (
            <div
              className={`w-full h-full flex items-center justify-center ${
                isWTB ? 'bg-blue-950/50' : 'bg-orange-950/50'
              }`}
            >
              <span className="text-6xl">{isWTB ? '🔍' : '🛹'}</span>
            </div>
          )}
          
          {/* WTB Badge */}
          {isWTB && (
            <Badge className="absolute top-2 left-2 bg-blue-500 text-white border-0 shadow-lg">
              <Search className="h-3 w-3 mr-1" />
              WTB
            </Badge>
          )}
          
          {/* Price Badge */}
          <div className="absolute top-2 right-2">
            <Badge
              className={`text-sm font-bold border-0 shadow-lg ${
                item.priceType === 'free'
                  ? 'bg-green-500 text-white'
                  : isWTB
                  ? 'bg-blue-500 text-white'
                  : 'bg-orange-500 text-white'
              }`}
            >
              {priceDisplay}
            </Badge>
          </div>

          {/* Condition Badge (bottom left) */}
          {conditionInfo && (
            <Badge
              variant="outline"
              className="absolute bottom-2 left-2 bg-black/80 border-gray-600 text-xs backdrop-blur-sm"
            >
              {conditionInfo.emoji} {conditionInfo.label}
            </Badge>
          )}
          
          {/* More options menu */}
          {!isOwnListingCheck && (
            <div className="absolute bottom-2 right-2">
              <DropdownMenu>
                <DropdownMenuTrigger asChild>
                  <Button
                    size="icon"
                    variant="ghost"
                    className="h-7 w-7 bg-black/80 backdrop-blur-sm text-gray-400 hover:text-white"
                    onClick={(e) => e.stopPropagation()}
                  >
                    <MoreVertical className="h-3.5 w-3.5" />
                  </Button>
                </DropdownMenuTrigger>
                <DropdownMenuContent align="end" className="w-40">
                  <DropdownMenuItem
                    onClick={(e) => {
                      e.stopPropagation();
                      setShowReportDialog(true);
                    }}
                    className="text-red-500 focus:text-red-500"
                  >
                    <Flag className="h-4 w-4 mr-2" />
                    Report
                  </DropdownMenuItem>
                </DropdownMenuContent>
              </DropdownMenu>
            </div>
          )}
        </div>

        {/* Content */}
        <div className="p-4">
          {/* Title */}
          <h3
            className={`font-bold text-sm uppercase mb-1 line-clamp-1 ${
              isWTB ? 'text-blue-400' : 'text-orange-400'
            }`}
          >
            {item.title}
          </h3>

          {/* Category + Size */}
          <div className="flex flex-wrap gap-1 mb-3">
            {categoryLabel && (
              <Badge variant="outline" className="text-[10px] border-gray-700 text-gray-400">
                {categoryLabel}
              </Badge>
            )}
            {item.size && (
              <Badge variant="outline" className="text-[10px] border-gray-700 text-gray-400">
                {item.size}
              </Badge>
            )}
          </div>

          {/* Location */}
          {item.location && (
            <div className="flex items-center gap-1 text-xs text-gray-500 mb-3">
              <MapPin className="h-3 w-3 text-orange-500" />
              <span className="truncate">{item.location}</span>
            </div>
          )}

          {/* Divider */}
          <div className="border-t border-gray-800 pt-3">
            {/* Seller Info */}
            <div className="flex items-center gap-2 mb-2">
              <Avatar className="h-6 w-6 border border-gray-700">
                <AvatarImage src={avatar} alt={displayName} />
                <AvatarFallback className="bg-gray-800 text-gray-400 text-xs">
                  {displayName.slice(0, 2).toUpperCase()}
                </AvatarFallback>
              </Avatar>
              <span className="text-xs text-gray-400 truncate flex-1">{displayName}</span>
              
              {/* Trust Badge */}
              <TooltipProvider>
                <Tooltip>
                  <TooltipTrigger asChild>
                    <Badge
                      variant="outline"
                      className={`text-[10px] px-1.5 gap-0.5 ${trustBadge.className}`}
                    >
                      {trustLevel === 'verified' && <CheckCircle className="h-3 w-3" />}
                      {trustLevel === 'trusted' && <ShieldCheck className="h-3 w-3" />}
                      {trustLevel === 'new' && <AlertTriangle className="h-3 w-3" />}
                      {trustBadge.label}
                    </Badge>
                  </TooltipTrigger>
                  <TooltipContent side="top">
                    <p className="text-xs">{trustBadge.description}</p>
                  </TooltipContent>
                </Tooltip>
              </TooltipProvider>
            </div>

            {/* Skateboard Rating */}
            <div className="flex items-center justify-between">
              <TooltipProvider>
                <Tooltip>
                  <TooltipTrigger asChild>
                    <div className="flex items-center gap-1">
                      {sellerRating.rating > 0 ? (
                        <span className="text-sm">{sellerRating.display}</span>
                      ) : (
                        <span className="text-xs text-gray-500">🛹 New seller</span>
                      )}
                    </div>
                  </TooltipTrigger>
                  <TooltipContent side="bottom">
                    <div className="text-center">
                      <p className="font-bold">{salesCount} sale{salesCount !== 1 ? 's' : ''}</p>
                      <p className="text-xs text-muted-foreground">{sellerRating.label}</p>
                    </div>
                  </TooltipContent>
                </Tooltip>
              </TooltipProvider>
              
              <span className="text-[10px] text-gray-600">{timeAgo}</span>
            </div>
          </div>

          {/* Contact Button */}
          <Button
            variant="outline"
            size="sm"
            className={`w-full mt-3 gap-2 ${
              isWTB
                ? 'border-blue-500/50 text-blue-400 hover:bg-blue-500/10'
                : 'border-orange-500/50 text-orange-400 hover:bg-orange-500/10'
            }`}
            onClick={(e) => {
              e.stopPropagation();
              navigate(`/messages/${npub}`);
            }}
          >
            <MessageCircle className="h-4 w-4" />
            {isWTB ? 'I Have This!' : 'Contact Seller'}
          </Button>
        </div>
      </CardContent>

      {/* Report Dialog */}
      <ReportDialog
        open={showReportDialog}
        onOpenChange={setShowReportDialog}
        targetType="listing"
        targetPubkey={item.pubkey}
        targetEventId={item.id}
        targetTitle={item.title}
      />
    </Card>
  );
}