"use client";

import { useState, useEffect, useRef } from "react";
import { Input } from "@/components/ui/input";
import { Button } from "@/components/ui/button";
import { Card, CardContent } from "@/components/ui/card";
import { Badge } from "@/components/ui/badge";
import { Search, X, Loader2 } from "lucide-react";
import Image from "next/image";
import { cn } from "@/lib/utils";

interface Item {
  id: number;
  name: string;
  category?: string;
  image?: string;
  rarity?: string;
  level?: number;
  weight?: number;
  npc_price?: number;
  [key: string]: any;
}

interface ItemSearchProps {
  onItemSelect: (item: Item) => void;
  selectedItem?: Item | null;
  placeholder?: string;
  className?: string;
}

export function ItemSearch({
  onItemSelect,
  selectedItem,
  placeholder = "Pesquisar item...",
  className,
}: ItemSearchProps) {
  const [searchQuery, setSearchQuery] = useState("");
  const [items, setItems] = useState<Item[]>([]);
  const [loading, setLoading] = useState(false);
  const [showDropdown, setShowDropdown] = useState(false);
  const [previewItem, setPreviewItem] = useState<Item | null>(selectedItem || null);
  const searchRef = useRef<HTMLDivElement>(null);
  const debounceRef = useRef<NodeJS.Timeout | undefined>(undefined);

  // Buscar itens ao digitar
  useEffect(() => {
    if (debounceRef.current) {
      clearTimeout(debounceRef.current);
    }

    if (searchQuery.trim().length < 2) {
      setItems([]);
      setShowDropdown(false);
      return;
    }

    setLoading(true);
    debounceRef.current = setTimeout(async () => {
      try {
        const res = await fetch(
          `/api/items?q=${encodeURIComponent(searchQuery)}&pageSize=10`
        );
        if (res.ok) {
          const data = await res.json();
          setItems(data.items || []);
          setShowDropdown(true);
        }
      } catch (error) {
        console.error("Erro ao buscar itens:", error);
      } finally {
        setLoading(false);
      }
    }, 300);
  }, [searchQuery]);

  // Fechar dropdown ao clicar fora
  useEffect(() => {
    const handleClickOutside = (event: MouseEvent) => {
      if (searchRef.current && !searchRef.current.contains(event.target as Node)) {
        setShowDropdown(false);
      }
    };

    document.addEventListener("mousedown", handleClickOutside);
    return () => document.removeEventListener("mousedown", handleClickOutside);
  }, []);

  // Atualizar preview quando item selecionado mudar externamente
  useEffect(() => {
    if (selectedItem) {
      setPreviewItem(selectedItem);
      setSearchQuery(selectedItem.name);
    }
  }, [selectedItem]);

  const handleItemClick = (item: Item) => {
    setPreviewItem(item);
    setSearchQuery(item.name);
    setShowDropdown(false);
    onItemSelect(item);
  };

  const handleClear = () => {
    setSearchQuery("");
    setPreviewItem(null);
    setItems([]);
    setShowDropdown(false);
    onItemSelect(null as any);
  };

  return (
    <div ref={searchRef} className={cn("relative", className)}>
      <div className="relative">
        <Search className="absolute left-3 top-1/2 -translate-y-1/2 h-4 w-4 text-muted-foreground" />
        <Input
          type="text"
          value={searchQuery}
          onChange={(e) => setSearchQuery(e.target.value)}
          onFocus={() => searchQuery.length >= 2 && setShowDropdown(true)}
          placeholder={placeholder}
          className="pl-9 pr-9"
        />
        {searchQuery && (
          <Button
            type="button"
            variant="ghost"
            size="icon"
            className="absolute right-1 top-1/2 -translate-y-1/2 h-6 w-6"
            onClick={handleClear}
          >
            <X className="h-4 w-4" />
          </Button>
        )}
        {loading && (
          <Loader2 className="absolute right-3 top-1/2 -translate-y-1/2 h-4 w-4 animate-spin text-muted-foreground" />
        )}
      </div>

      {/* Dropdown de resultados */}
      {showDropdown && items.length > 0 && (
        <div className="absolute z-50 w-full mt-1 bg-background border rounded-md shadow-lg max-h-60 overflow-y-auto">
          {items.map((item) => (
            <div
              key={item.id}
              className="p-2 hover:bg-accent cursor-pointer flex items-center gap-3"
              onClick={() => handleItemClick(item)}
            >
              {item.image && (
                <div className="relative w-10 h-10 flex-shrink-0 rounded bg-muted">
                  <Image
                    src={item.image}
                    alt={item.name}
                    fill
                    style={{ objectFit: "contain" }}
                    sizes="40px"
                  />
                </div>
              )}
              <div className="flex-1 min-w-0">
                <p className="text-sm font-medium truncate">{item.name}</p>
                {item.category && (
                  <p className="text-xs text-muted-foreground">{item.category}</p>
                )}
              </div>
              {item.rarity && (
                <Badge variant="secondary" className="text-xs">
                  {item.rarity}
                </Badge>
              )}
            </div>
          ))}
        </div>
      )}

      {/* Preview do item selecionado */}
      {previewItem && (
        <Card className="mt-3">
          <CardContent className="p-4">
            <div className="flex gap-4">
              {previewItem.image && (
                <div className="relative w-20 h-20 flex-shrink-0 rounded-lg bg-muted overflow-hidden">
                  <Image
                    src={previewItem.image}
                    alt={previewItem.name}
                    fill
                    style={{ objectFit: "contain" }}
                    sizes="80px"
                  />
                </div>
              )}
              <div className="flex-1">
                <h4 className="font-semibold text-lg">{previewItem.name}</h4>
                <div className="flex flex-wrap gap-2 mt-2 text-sm text-muted-foreground">
                  {previewItem.category && (
                    <span className="flex items-center gap-1">
                      <span className="font-medium">Categoria:</span>
                      {previewItem.category}
                    </span>
                  )}
                  {previewItem.rarity && (
                    <Badge variant="secondary">{previewItem.rarity}</Badge>
                  )}
                  {previewItem.level !== undefined && previewItem.level !== null && (
                    <span className="flex items-center gap-1">
                      <span className="font-medium">Level:</span>
                      {previewItem.level}
                    </span>
                  )}
                  {previewItem.weight !== undefined && previewItem.weight !== null && (
                    <span className="flex items-center gap-1">
                      <span className="font-medium">Peso:</span>
                      {previewItem.weight} oz
                    </span>
                  )}
                  {previewItem.npc_price !== undefined && previewItem.npc_price !== null && (
                    <span className="flex items-center gap-1">
                      <span className="font-medium">Preço NPC:</span>
                      {previewItem.npc_price.toLocaleString()} gp
                    </span>
                  )}
                </div>
              </div>
            </div>
          </CardContent>
        </Card>
      )}
    </div>
  );
}