"use client";

import { useState, useEffect } from "react";
import { Card, CardContent, CardFooter, CardHeader } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { Badge } from "@/components/ui/badge";
import { Heart, Clock, Eye, Star, MapPin, DollarSign, Coins, RefreshCw, ShoppingCart, TrendingUp, User } from "lucide-react";
import { useAdTracking, useMarketTelemetry } from "@/lib/hooks/use-telemetry";
import { useSession } from "@/lib/hooks/use-session";
import { useQueryClient } from "@tanstack/react-query";
import Image from "next/image";
import { PurchaseModal } from "./PurchaseModal";
import { BidModal } from "./BidModal";
import { SellerInfo } from "./SellerInfo";
import { ListingDetailsModal } from "./ListingDetailsModal";

// Função auxiliar para formatar tempo relativo
function formatTimeAgo(date: Date): string {
  const seconds = Math.floor((new Date().getTime() - date.getTime()) / 1000);
  if (seconds < 60) return "há alguns segundos";
  const minutes = Math.floor(seconds / 60);
  if (minutes < 60) return `há ${minutes} ${minutes === 1 ? "minuto" : "minutos"}`;
  const hours = Math.floor(minutes / 60);
  if (hours < 24) return `há ${hours} ${hours === 1 ? "hora" : "horas"}`;
  const days = Math.floor(hours / 24);
  if (days < 30) return `há ${days} ${days === 1 ? "dia" : "dias"}`;
  const months = Math.floor(days / 30);
  if (months < 12) return `há ${months} ${months === 1 ? "mês" : "meses"}`;
  const years = Math.floor(months / 12);
  return `há ${years} ${years === 1 ? "ano" : "anos"}`;
}

interface Listing {
  listing_id: number;
  seller_id: number;
  item_id: number; // ID legado (SQLite) - mantido para compatibilidade
  item_name: string;
  quantity: number;
  server_name: string;
  price_pix: number | string | null; // PostgreSQL DECIMAL pode vir como string
  price_tibia_coins: number | string | null; // PostgreSQL INTEGER pode vir como string
  price_gold_coins: number | string | null; // PostgreSQL BIGINT pode vir como string
  is_auction: boolean;
  description: string | null;
  listing_status: string;
  created_at: string;
  views_count: number;
  favorites_count: number;
  is_featured?: boolean;
  trade_item_id?: number | null;
  trade_item_name?: string | null;
  trade_item_quantity?: number | null;
  // Campos de leilão
  current_bid_amount?: number | null;
  min_bid_increment?: number | null;
  initial_price_pix?: number | null;
  initial_price_tibia_coins?: number | null;
  initial_price_gold_coins?: number | null;
  auction_ends_at?: Date | null;
  // Campos do JOIN com items (unificado)
  item_id_unified?: number | null; // ID unificado da tabela items
  image_local_path?: string | null;
  image_url?: string | null;
  item_category?: string | null;
  // Campo do vendedor
  seller_character_name?: string | null;
}

interface PriceInfo {
  type: "pix" | "tc" | "gp" | "trade";
  label: string;
  value: string;
}

interface AdCardProps {
  listing: Listing;
  viewMode?: "grid" | "list";
}

export function AdCard({ listing, viewMode = "grid" }: AdCardProps) {
  const { user } = useSession();
  const queryClient = useQueryClient();
  const { trackAdClick, trackFavorite } = useMarketTelemetry();
  const [isFavorited, setIsFavorited] = useState(false);
  const [favoritesCount, setFavoritesCount] = useState(listing.favorites_count || 0);
  const [showPurchaseModal, setShowPurchaseModal] = useState(false);
  const [showBidModal, setShowBidModal] = useState(false);
  const [showDetailsModal, setShowDetailsModal] = useState(false);

  const invalidateCache = () => {
    queryClient.invalidateQueries({ queryKey: ["listings"] });
    queryClient.invalidateQueries({ queryKey: ["my-listings"] });
  };

  // Tracking automático de visualização
  useAdTracking(listing.listing_id);

  // Verificar se está favoritado
  useEffect(() => {
    if (user?.userId && listing.listing_id) {
      fetch(`/api/listings/${listing.listing_id}/favorite`)
        .then((res) => {
          if (res.ok) {
            return res.json();
          }
          return null;
        })
        .then((data) => {
          if (data?.success) {
            setIsFavorited(data.favorited);
          }
        })
        .catch(() => {
          // Silenciar erro para não gerar mensagens no console
        });
    }
  }, [user?.userId, listing.listing_id]);

  const handleFavorite = async () => {
    if (!user) return;

    const action = isFavorited ? "unfavorite" : "favorite";
    trackFavorite(listing.listing_id, action);

    try {
      const res = await fetch(`/api/listings/${listing.listing_id}/favorite`, {
        method: "POST",
      });

      if (res.ok) {
        const data = await res.json();
        setIsFavorited(data.favorited);
        setFavoritesCount((prev) => (data.favorited ? prev + 1 : Math.max(0, prev - 1)));
      }
    } catch (error) {
      console.error("Erro ao favoritar:", error);
    }
  };

  const handleClick = (e?: React.MouseEvent) => {
    if (e) {
      e.stopPropagation();
    }
    trackAdClick(listing.listing_id);
    setShowDetailsModal(true);
  };

  const handlePause = async () => {
    try {
      const res = await fetch(`/api/listings/${listing.listing_id}/pause`, {
        method: "POST",
      });
      if (res.ok) {
        setShowDetailsModal(false);
        invalidateCache();
      }
    } catch (error) {
      console.error("Erro ao pausar anúncio:", error);
    }
  };

  const handleActivate = async () => {
    try {
      const res = await fetch(`/api/listings/${listing.listing_id}/activate`, {
        method: "POST",
      });
      if (res.ok) {
        setShowDetailsModal(false);
        invalidateCache();
      } else {
        const data = await res.json();
        alert(data.error || "Erro ao reativar anúncio");
      }
    } catch (error) {
      console.error("Erro ao reativar anúncio:", error);
      alert("Erro ao reativar anúncio");
    }
  };

  const handleCancel = async () => {
    if (!confirm("Tem certeza que deseja cancelar este anúncio?")) {
      return;
    }
    try {
      const res = await fetch(`/api/listings/${listing.listing_id}`, {
        method: "DELETE",
      });
      if (res.ok) {
        setShowDetailsModal(false);
        invalidateCache();
      } else {
        const data = await res.json();
        alert(data.error || "Erro ao cancelar anúncio");
      }
    } catch (error) {
      console.error("Erro ao cancelar anúncio:", error);
      alert("Erro ao cancelar anúncio");
    }
  };

  const getAvailablePrices = (): PriceInfo[] => {
    const prices: PriceInfo[] = [];

    // PIX
    if (listing.price_pix) {
      const price = typeof listing.price_pix === 'string' 
        ? parseFloat(listing.price_pix) 
        : listing.price_pix;
      if (!isNaN(price)) {
        prices.push({
          type: "pix",
          label: "PIX",
          value: `R$ ${price.toFixed(2)}`,
        });
      }
    }

    // Tibia Coins
    if (listing.price_tibia_coins) {
      const price = typeof listing.price_tibia_coins === 'string'
        ? parseInt(listing.price_tibia_coins, 10)
        : listing.price_tibia_coins;
      if (!isNaN(price)) {
        prices.push({
          type: "tc",
          label: "TC",
          value: `${price.toLocaleString()} TC`,
        });
      }
    }

    // Gold Coins
    if (listing.price_gold_coins) {
      const price = typeof listing.price_gold_coins === 'string'
        ? parseInt(listing.price_gold_coins, 10)
        : listing.price_gold_coins;
      if (!isNaN(price)) {
        prices.push({
          type: "gp",
          label: "GP",
          value: `${price.toLocaleString()} GP`,
        });
      }
    }

    // Item de Troca
    if (listing.trade_item_id && listing.trade_item_name && listing.trade_item_quantity) {
      const quantity = listing.trade_item_quantity;
      prices.push({
        type: "trade",
        label: "Troca",
        value: `Troca por ${quantity}x ${listing.trade_item_name}`,
      });
    }

    return prices;
  };

  const timeAgo = formatTimeAgo(new Date(listing.created_at));
  const availablePrices = getAvailablePrices();
  const isSold = listing.listing_status === "sold";

  // Função para obter URL da imagem do item
  const getItemImageUrl = (): string => {
    // Prioridade 1: image_url (URL externa) se disponível
    if (listing.image_url) {
      return listing.image_url;
    }
    
    // Prioridade 2: image_local_path se disponível
    if (listing.image_local_path) {
      const normalizedPath = listing.image_local_path.replace(/\\/g, "/");
      if (normalizedPath.startsWith("data/")) {
        return `/api/images?path=${encodeURIComponent(normalizedPath)}`;
      }
      // Construir caminho se necessário
      const category = listing.item_category || "other";
      return `/api/images?path=${encodeURIComponent(`data/images/${category}/${normalizedPath}`)}`;
    }
    
    // Prioridade 3: Usar item_id_unified se disponível (com nome para validação)
    if (listing.item_id_unified) {
      const params = new URLSearchParams({ item: listing.item_id_unified.toString() });
      if (listing.item_name) {
        params.set("name", listing.item_name);
      }
      return `/api/images?${params.toString()}`;
    }
    
    // Fallback: Usar item_id legado (com nome para validação)
    const params = new URLSearchParams({ item: listing.item_id.toString() });
    if (listing.item_name) {
      params.set("name", listing.item_name);
    }
    return `/api/images?${params.toString()}`;
  };

  const itemImageUrl = getItemImageUrl();

  // Componente para exibir badges de preços
  const PriceBadges = ({ prices, compact = false }: { prices: PriceInfo[]; compact?: boolean }) => {
    if (prices.length === 0) {
      return <div className="text-sm text-muted-foreground">Preço não informado</div>;
    }

    const getBadgeClassName = (type: PriceInfo["type"]) => {
      switch (type) {
        case "pix":
          return "bg-green-500 hover:bg-green-600 text-white";
        case "tc":
          return "bg-blue-500 hover:bg-blue-600 text-white";
        case "gp":
          return "bg-yellow-500 hover:bg-yellow-600 text-white";
        case "trade":
          return "bg-purple-500 hover:bg-purple-600 text-white";
        default:
          return "";
      }
    };

    const getIcon = (type: PriceInfo["type"]) => {
      switch (type) {
        case "pix":
          return <DollarSign className="h-3 w-3" />;
        case "tc":
        case "gp":
          return <Coins className="h-3 w-3" />;
        case "trade":
          return <RefreshCw className="h-3 w-3" />;
        default:
          return null;
      }
    };

    if (prices.length === 1 && !compact) {
      // Se houver apenas um preço, mostrar em destaque
      const price = prices[0];
      return (
        <div className="flex items-center gap-2">
          <div className="text-2xl font-bold">{price.value}</div>
          <Badge className={getBadgeClassName(price.type)}>
            {getIcon(price.type)}
            <span className="ml-1">{price.label}</span>
          </Badge>
        </div>
      );
    }

    // Múltiplos preços: mostrar badges
    if (compact) {
      // Layout compacto para modo list
      return (
        <div className="flex flex-wrap items-center gap-2">
          {prices.map((price, index) => (
            <Badge key={index} className={getBadgeClassName(price.type)}>
              {getIcon(price.type)}
              <span className="ml-1">{price.value}</span>
            </Badge>
          ))}
        </div>
      );
    }

    // Layout para modo grid
    if (prices.length <= 3) {
      // Grid 2 colunas para 2-3 preços
      return (
        <div className="grid grid-cols-2 gap-2">
          {prices.map((price, index) => (
            <Badge key={index} className={`${getBadgeClassName(price.type)} justify-center`}>
              {getIcon(price.type)}
              <span className="ml-1 text-xs">{price.value}</span>
            </Badge>
          ))}
        </div>
      );
    }

    // Flex wrap para 4+ preços
    return (
      <div className="flex flex-wrap gap-2">
        {prices.map((price, index) => (
          <Badge key={index} className={`${getBadgeClassName(price.type)} text-xs`}>
            {getIcon(price.type)}
            <span className="ml-1">{price.value}</span>
          </Badge>
        ))}
      </div>
    );
  };

  if (viewMode === "list") {
    return (
      <Card
        className={`hover:shadow-lg transition-shadow ${isSold ? "opacity-75 relative" : ""}`}
      >
        {isSold && (
          <div className="absolute inset-0 bg-black/10 rounded-lg z-10 pointer-events-none" />
        )}
        <div className="flex gap-4 p-4">
          {/* Thumbnail */}
          <div className="relative w-24 h-24 flex-shrink-0 rounded-lg overflow-hidden bg-muted flex items-center justify-center p-2">
            <Image
              src={itemImageUrl}
              alt={listing.item_name}
              fill
              className="object-contain"
              sizes="96px"
              onError={(e) => {
                (e.target as HTMLImageElement).src = "/placeholder-item.png";
              }}
            />
          </div>

          {/* Conteúdo */}
          <div className="flex-1 min-w-0">
            <div className="flex items-start justify-between gap-2">
              <div className="flex-1 min-w-0">
                <h3 className="font-semibold text-lg truncate">{listing.item_name}</h3>
                <div className="mt-2 mb-2">
                  {listing.seller_character_name && (
                    <SellerInfo
                      sellerId={listing.seller_id}
                      sellerName={listing.seller_character_name}
                      serverName={listing.server_name}
                      listingId={listing.listing_id}
                    />
                  )}
                </div>
                <div className="flex items-center gap-2 text-sm text-muted-foreground flex-wrap">
                  <div className="flex items-center gap-1">
                    <Clock className="h-3 w-3" />
                    <span>{timeAgo}</span>
                  </div>
                </div>
              </div>
              <div className="flex items-center gap-2">
                {isSold && (
                  <Badge variant="default" className="bg-red-600 text-white font-semibold">
                    Vendido
                  </Badge>
                )}
                {listing.is_featured && (
                  <Badge variant="default" className="bg-yellow-500">
                    <Star className="h-3 w-3 mr-1" />
                    Destaque
                  </Badge>
                )}
                {listing.is_auction && (
                  <Badge variant="secondary">Leilão</Badge>
                )}
                <Button
                  variant="ghost"
                  size="sm"
                  onClick={(e) => {
                    e.stopPropagation();
                    handleFavorite();
                  }}
                  disabled={!user}
                >
                  <Heart
                    className={`h-4 w-4 ${isFavorited ? "fill-red-500 text-red-500" : ""}`}
                  />
                  <span className="ml-1">{favoritesCount}</span>
                </Button>
              </div>
            </div>
            {listing.description && (
              <p className="text-sm text-muted-foreground mt-2 line-clamp-2">
                {listing.description}
              </p>
            )}
            <div className="flex items-center justify-between mt-3">
              <div className="flex-1 min-w-0">
                <PriceBadges prices={availablePrices} compact />
                
                {/* Informações de lance se for leilão */}
                {listing.is_auction && (
                  <div className="mt-2 bg-muted p-2 rounded text-xs space-y-1">
                    {listing.current_bid_amount ? (
                      <>
                        <div className="flex items-center justify-between">
                          <span className="text-muted-foreground">Lance Atual:</span>
                          <span className="font-semibold text-primary">
                            R$ {typeof listing.current_bid_amount === 'number' ? listing.current_bid_amount.toFixed(2) : parseFloat(String(listing.current_bid_amount)).toFixed(2)}
                          </span>
                        </div>
                        <div className="flex items-center justify-between">
                          <span className="text-muted-foreground">Leilão Ativo</span>
                          <Badge variant="secondary" className="text-xs">
                            <TrendingUp className="h-3 w-3 mr-1" />
                            Lances
                          </Badge>
                        </div>
                      </>
                    ) : (
                      <div className="text-center text-muted-foreground">
                        Sem lances ainda
                      </div>
                    )}
                  </div>
                )}
              </div>
              <div className="flex items-center gap-4 ml-4">
                <div className="flex items-center gap-4 text-sm text-muted-foreground">
                  <div className="flex items-center gap-1">
                    <Eye className="h-4 w-4" />
                    <span>{listing.views_count}</span>
                  </div>
                  <div className="flex items-center gap-1">
                    <span>Qtd: {listing.quantity}</span>
                  </div>
                </div>
                
                {/* Botões de ação - desabilitados se vendido */}
                {user && user.userId !== listing.seller_id && listing.listing_status === "active" && !isSold && (
                  <div className="flex items-center gap-2">
                    {listing.is_auction ? (
                      <Button
                        variant="default"
                        size="sm"
                        onClick={(e) => {
                          e.stopPropagation();
                          setShowBidModal(true);
                        }}
                        disabled={isSold}
                      >
                        <TrendingUp className="h-4 w-4 mr-2" />
                        Dar Lance
                      </Button>
                    ) : (
                      <Button
                        variant="default"
                        size="sm"
                        onClick={(e) => {
                          e.stopPropagation();
                          setShowPurchaseModal(true);
                        }}
                        disabled={isSold}
                      >
                        <ShoppingCart className="h-4 w-4 mr-2" />
                        Comprar
                      </Button>
                    )}
                  </div>
                )}
                {isSold && (
                  <div className="text-sm text-muted-foreground italic">
                    Este item já foi vendido
                  </div>
                )}
              </div>
            </div>
          </div>
        </div>

        {/* Modais */}
      <PurchaseModal
        open={showPurchaseModal}
        onOpenChange={setShowPurchaseModal}
        listing={listing}
        onSuccess={() => {
          invalidateCache();
        }}
      />
      <BidModal
        open={showBidModal}
        onOpenChange={setShowBidModal}
        listing={listing}
        onSuccess={() => {
          invalidateCache();
        }}
      />
        <ListingDetailsModal
          open={showDetailsModal}
          onOpenChange={setShowDetailsModal}
          listing={listing}
          onPause={handlePause}
          onActivate={handleActivate}
          onCancel={handleCancel}
        />
      </Card>
    );
  }

  // View mode grid (padrão)
  return (
    <Card
      className={`hover:shadow-lg transition-shadow flex flex-col ${isSold ? "opacity-75 relative" : ""}`}
    >
      {isSold && (
        <div className="absolute inset-0 bg-black/10 rounded-lg z-10 pointer-events-none" />
      )}
      <CardHeader className="p-0 relative">
        {/* Thumbnail */}
        <div className="relative w-full aspect-square rounded-t-lg overflow-hidden bg-muted flex items-center justify-center p-4">
          <Image
            src={itemImageUrl}
            alt={listing.item_name}
            fill
            className="object-contain"
            sizes="(max-width: 640px) 100vw, (max-width: 1024px) 50vw, 25vw"
            onError={(e) => {
              (e.target as HTMLImageElement).src = "/placeholder-item.png";
            }}
          />
          {isSold && (
            <div className="absolute top-2 right-2 z-20">
              <Badge variant="default" className="bg-red-600 text-white font-semibold">
                Vendido
              </Badge>
            </div>
          )}
          {listing.is_featured && (
            <div className={`absolute ${isSold ? "top-2 left-2" : "top-2 right-2"} z-20`}>
              <Badge variant="default" className="bg-yellow-500">
                <Star className="h-3 w-3 mr-1" />
                Destaque
              </Badge>
            </div>
          )}
          {listing.is_auction && !isSold && (
            <div className="absolute top-2 left-2 z-20">
              <Badge variant="secondary">Leilão</Badge>
            </div>
          )}
        </div>
      </CardHeader>

      <CardContent className="p-4 flex-1 flex flex-col">
        <h3 className="font-semibold text-lg mb-2 line-clamp-2">{listing.item_name}</h3>

        <div className="mb-2">
          {listing.seller_character_name && (
            <SellerInfo
              sellerId={listing.seller_id}
              sellerName={listing.seller_character_name}
              serverName={listing.server_name}
              listingId={listing.listing_id}
            />
          )}
        </div>

        {listing.description && (
          <p className="text-sm text-muted-foreground mb-3 line-clamp-2">
            {listing.description}
          </p>
        )}

        <div className="mt-auto space-y-2">
          <PriceBadges prices={availablePrices} />
          
          {/* Informações de lance se for leilão */}
          {listing.is_auction && (
            <div className="bg-muted p-2 rounded text-xs space-y-1">
              {listing.current_bid_amount ? (
                <>
                  <div className="flex items-center justify-between">
                    <span className="text-muted-foreground">Lance Atual:</span>
                    <span className="font-semibold text-primary">
                      R$ {typeof listing.current_bid_amount === 'number' ? listing.current_bid_amount.toFixed(2) : parseFloat(String(listing.current_bid_amount)).toFixed(2)}
                    </span>
                  </div>
                  {listing.min_bid_increment && (
                    <div className="flex items-center justify-between">
                      <span className="text-muted-foreground">Incremento Mín:</span>
                      <span className="font-medium">
                        R$ {typeof listing.min_bid_increment === 'number' ? listing.min_bid_increment.toFixed(2) : parseFloat(String(listing.min_bid_increment)).toFixed(2)}
                      </span>
                    </div>
                  )}
                  <div className="flex items-center justify-center pt-1">
                    <Badge variant="secondary" className="text-xs">
                      <TrendingUp className="h-3 w-3 mr-1" />
                      Leilão Ativo
                    </Badge>
                  </div>
                </>
              ) : (
                <div className="text-center text-muted-foreground py-1">
                  Sem lances ainda
                </div>
              )}
            </div>
          )}

          <div className="flex items-center justify-between text-xs text-muted-foreground">
            <div className="flex items-center gap-1">
              <Clock className="h-3 w-3" />
              <span>{timeAgo}</span>
            </div>
            <div className="flex items-center gap-1">
              <Eye className="h-3 w-3" />
              <span>{listing.views_count}</span>
            </div>
          </div>
        </div>
      </CardContent>

      <CardFooter className="p-4 pt-0 flex items-center justify-between gap-2">
        {/* Botão de compra/lance - apenas se não for o vendedor, estiver ativo e não vendido */}
        {user && user.userId !== listing.seller_id && listing.listing_status === "active" && !isSold && (
          <>
            {listing.is_auction ? (
              <Button
                variant="default"
                size="sm"
                className="flex-1"
                onClick={(e) => {
                  e.stopPropagation();
                  setShowBidModal(true);
                }}
                disabled={isSold}
              >
                <TrendingUp className="h-4 w-4 mr-2" />
                Dar Lance
              </Button>
            ) : (
              <Button
                variant="default"
                size="sm"
                className="flex-1"
                onClick={(e) => {
                  e.stopPropagation();
                  setShowPurchaseModal(true);
                }}
                disabled={isSold}
              >
                <ShoppingCart className="h-4 w-4 mr-2" />
                Comprar
              </Button>
            )}
          </>
        )}
        {isSold && (
          <div className="text-sm text-muted-foreground italic flex-1 text-center">
            Este item já foi vendido
          </div>
        )}
        
        {/* Se não for o vendedor, mostrar botão de detalhes também */}
        {(!user || user.userId === listing.seller_id) && (
          <Button
            variant="outline"
            size="sm"
            className="flex-1"
            onClick={handleClick}
          >
            Ver Detalhes
          </Button>
        )}

        <Button
          variant="ghost"
          size="sm"
          onClick={(e) => {
            e.stopPropagation();
            handleFavorite();
          }}
          disabled={!user}
        >
          <Heart
            className={`h-4 w-4 ${isFavorited ? "fill-red-500 text-red-500" : ""}`}
          />
          <span className="ml-1">{favoritesCount}</span>
        </Button>
      </CardFooter>

      {/* Modais */}
      <PurchaseModal
        open={showPurchaseModal}
        onOpenChange={setShowPurchaseModal}
        listing={listing}
        onSuccess={() => {
          // Recarregar página ou atualizar lista
          window.location.reload();
        }}
      />
      <BidModal
        open={showBidModal}
        onOpenChange={setShowBidModal}
        listing={listing}
        onSuccess={() => {
          // Recarregar página ou atualizar lista
          window.location.reload();
        }}
      />
      <ListingDetailsModal
        open={showDetailsModal}
        onOpenChange={setShowDetailsModal}
        listing={listing}
        onPause={handlePause}
        onActivate={handleActivate}
        onCancel={handleCancel}
      />
    </Card>
  );
}