"use client";

import React, { useState, useMemo } from "react";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { ComponentRegistry } from "@/lib/registry/ComponentRegistry";
import { ComponentDefinition, ComponentCategory } from "@/types/component";
import { Search, Package, Grid, Layers, Palette, Zap, RotateCcw } from "lucide-react";

interface ComponentsPanelProps {
  className?: string;
}

export function ComponentsPanel({ className }: ComponentsPanelProps) {
  const [searchQuery, setSearchQuery] = useState("");
  const [selectedCategory, setSelectedCategory] = useState<ComponentCategory | "all">("all");

  // 레지스트리에서 모든 컴포넌트 조회
  const allComponents = useMemo(() => {
    const components = ComponentRegistry.getAllComponents();
    console.log("🔍 ComponentsPanel - 로드된 컴포넌트:", components.map(c => ({ id: c.id, name: c.name, category: c.category })));
    
    // 수동으로 table-list 컴포넌트 추가 (임시)
    const hasTableList = components.some(c => c.id === 'table-list');
    if (!hasTableList) {
      console.log("⚠️ table-list 컴포넌트가 없어서 수동 추가");
      components.push({
        id: "table-list",
        name: "테이블 리스트",
        nameEng: "TableList Component", 
        description: "데이터베이스 테이블의 데이터를 목록으로 표시하는 컴포넌트",
        category: "display",
        webType: "text",
        defaultConfig: {},
        defaultSize: { width: 800, height: 400 },
        icon: "Table",
        tags: ["테이블", "데이터", "목록", "그리드"],
        version: "1.0.0",
        author: "개발팀",
      });
    }
    
    return components;
  }, []);

  // 카테고리별 분류 (input 카테고리 제외)
  const componentsByCategory = useMemo(() => {
    // input 카테고리 컴포넌트들을 제외한 컴포넌트만 필터링
    const filteredComponents = allComponents.filter((component) => component.category !== "input");

    const categories: Record<ComponentCategory | "all", ComponentDefinition[]> = {
      all: filteredComponents, // input 카테고리 제외된 컴포넌트들만 포함
      input: [], // 빈 배열로 유지 (사용되지 않음)
      display: [],
      action: [],
      layout: [],
      utility: [],
    };

    filteredComponents.forEach((component) => {
      if (categories[component.category]) {
        categories[component.category].push(component);
      }
    });

    return categories;
  }, [allComponents]);

  // 검색 및 필터링된 컴포넌트
  const filteredComponents = useMemo(() => {
    let components = componentsByCategory[selectedCategory] || [];

    if (searchQuery.trim()) {
      const query = searchQuery.toLowerCase();
      components = components.filter(
        (component) =>
          component.name.toLowerCase().includes(query) ||
          component.description.toLowerCase().includes(query) ||
          component.tags?.some((tag) => tag.toLowerCase().includes(query)),
      );
    }

    return components;
  }, [componentsByCategory, selectedCategory, searchQuery]);

  // 드래그 시작 핸들러
  const handleDragStart = (e: React.DragEvent, component: ComponentDefinition) => {
    const dragData = {
      type: "component",
      component: component,
    };
    console.log("🚀 컴포넌트 드래그 시작:", component.name, dragData);
    e.dataTransfer.setData("application/json", JSON.stringify(dragData));
    e.dataTransfer.effectAllowed = "copy";
  };

  // 카테고리별 아이콘
  const getCategoryIcon = (category: ComponentCategory | "all") => {
    switch (category) {
      case "input":
        return <Grid className="h-4 w-4" />;
      case "display":
        return <Palette className="h-4 w-4" />;
      case "action":
        return <Zap className="h-4 w-4" />;
      case "layout":
        return <Layers className="h-4 w-4" />;
      case "utility":
        return <Package className="h-4 w-4" />;
      default:
        return <Package className="h-4 w-4" />;
    }
  };

  // 컴포넌트 새로고침
  const handleRefresh = () => {
    // Hot Reload 트리거 (개발 모드에서만)
    if (process.env.NODE_ENV === "development") {
      ComponentRegistry.refreshComponents?.();
    }
    window.location.reload();
  };

  return (
    <div className={`h-full bg-gradient-to-br from-slate-50 to-purple-50/30 border-r border-gray-200/60 shadow-sm ${className}`}>
      <div className="p-6">
        {/* 헤더 */}
        <div className="flex items-center justify-between mb-6">
          <div>
            <h2 className="text-lg font-semibold text-gray-900 mb-1">컴포넌트</h2>
            <p className="text-sm text-gray-500">{componentsByCategory.all.length}개의 사용 가능한 컴포넌트</p>
          </div>
          <Button 
            variant="outline" 
            size="sm" 
            onClick={handleRefresh} 
            title="컴포넌트 새로고침"
            className="bg-white/60 border-gray-200/60 hover:bg-white hover:border-gray-300"
          >
            <RotateCcw className="h-4 w-4" />
          </Button>
        </div>

        {/* 검색창 */}
        <div className="relative mb-6">
          <Search className="absolute top-1/2 left-3 h-4 w-4 -translate-y-1/2 text-gray-400" />
          <Input
            placeholder="컴포넌트 검색..."
            value={searchQuery}
            onChange={(e) => setSearchQuery(e.target.value)}
            className="pl-10 border-0 bg-white/80 backdrop-blur-sm shadow-sm focus:bg-white transition-colors"
          />
        </div>
      </div>

      <div className="px-6">
        <Tabs
          value={selectedCategory}
          onValueChange={(value) => setSelectedCategory(value as ComponentCategory | "all")}
        >
          {/* 카테고리 탭 (input 카테고리 제외) */}
          <TabsList className="grid w-full grid-cols-3 lg:grid-cols-5 bg-white/60 backdrop-blur-sm border-0 p-1">
            <TabsTrigger value="all" className="flex items-center text-xs data-[state=active]:bg-purple-600 data-[state=active]:text-white">
              <Package className="mr-1 h-3 w-3" />
              전체
            </TabsTrigger>
            <TabsTrigger value="display" className="flex items-center text-xs data-[state=active]:bg-purple-600 data-[state=active]:text-white">
              <Palette className="mr-1 h-3 w-3" />
              표시
            </TabsTrigger>
            <TabsTrigger value="action" className="flex items-center text-xs data-[state=active]:bg-purple-600 data-[state=active]:text-white">
              <Zap className="mr-1 h-3 w-3" />
              액션
            </TabsTrigger>
            <TabsTrigger value="layout" className="flex items-center text-xs data-[state=active]:bg-purple-600 data-[state=active]:text-white">
              <Layers className="mr-1 h-3 w-3" />
              레이아웃
            </TabsTrigger>
            <TabsTrigger value="utility" className="flex items-center text-xs data-[state=active]:bg-purple-600 data-[state=active]:text-white">
              <Package className="mr-1 h-3 w-3" />
              유틸리티
            </TabsTrigger>
          </TabsList>

          {/* 컴포넌트 목록 */}
          <div className="mt-6">
            <TabsContent value={selectedCategory} className="space-y-3">
              {filteredComponents.length > 0 ? (
                <div className="grid max-h-96 grid-cols-1 gap-3 overflow-y-auto pr-2">
                  {filteredComponents.map((component) => (
                    <div
                      key={component.id}
                      draggable
                      onDragStart={(e) => {
                        handleDragStart(e, component);
                        // 드래그 시작 시 시각적 피드백
                        e.currentTarget.style.opacity = '0.5';
                        e.currentTarget.style.transform = 'rotate(-3deg) scale(0.95)';
                      }}
                      onDragEnd={(e) => {
                        // 드래그 종료 시 원래 상태로 복원
                        e.currentTarget.style.opacity = '1';
                        e.currentTarget.style.transform = 'none';
                      }}
                      className="group cursor-grab rounded-lg border border-gray-200/40 bg-white/90 backdrop-blur-sm p-5 shadow-sm transition-all duration-300 hover:bg-white hover:shadow-lg hover:shadow-purple-500/15 hover:scale-[1.02] hover:border-purple-300/60 hover:-translate-y-1 active:cursor-grabbing active:scale-[0.98] active:translate-y-0"
                      title={component.description}
                    >
                      <div className="flex items-start space-x-4">
                        <div className="flex h-14 w-14 items-center justify-center rounded-xl bg-gradient-to-br from-purple-500 to-purple-600 text-white shadow-md group-hover:shadow-lg group-hover:scale-110 transition-all duration-300">
                          {getCategoryIcon(component.category)}
                        </div>
                        <div className="min-w-0 flex-1">
                          <div className="flex items-start justify-between mb-2">
                            <h4 className="font-semibold text-gray-900 text-sm leading-tight">{component.name}</h4>
                            <Badge variant="default" className="bg-gradient-to-r from-emerald-500 to-emerald-600 text-white text-xs border-0 ml-2 px-2 py-1 rounded-full font-medium shadow-sm">
                              신규
                            </Badge>
                          </div>

                          <p className="text-xs text-gray-500 line-clamp-2 leading-relaxed mb-3">{component.description}</p>

                          <div className="flex items-center justify-between mb-2">
                            <div className="flex items-center space-x-2 text-xs text-gray-400">
                              <span className="bg-gradient-to-r from-gray-100 to-gray-200 px-3 py-1 rounded-full font-medium text-gray-600">
                                {component.defaultSize.width}×{component.defaultSize.height}
                              </span>
                            </div>
                            <span className="text-xs font-medium text-purple-600 capitalize bg-gradient-to-r from-purple-50 to-indigo-50 px-3 py-1 rounded-full border border-purple-200/50">
                              {component.category}
                            </span>
                          </div>

                          {/* 태그 */}
                          {component.tags && component.tags.length > 0 && (
                            <div className="flex flex-wrap gap-1">
                              {component.tags.slice(0, 2).map((tag, index) => (
                                <Badge key={index} variant="outline" className="text-xs bg-gradient-to-r from-gray-50 to-gray-100 text-gray-600 border-gray-200/50 rounded-full px-2 py-1">
                                  {tag}
                                </Badge>
                              ))}
                              {component.tags.length > 2 && (
                                <Badge variant="outline" className="text-xs bg-gradient-to-r from-gray-50 to-gray-100 text-gray-600 border-gray-200/50 rounded-full px-2 py-1">
                                  +{component.tags.length - 2}
                                </Badge>
                              )}
                            </div>
                          )}
                        </div>
                      </div>
                    </div>
                  ))}
                </div>
              ) : (
                <div className="py-12 text-center text-gray-500">
                  <div className="p-8">
                    <Package className="mx-auto mb-3 h-12 w-12 text-gray-300" />
                    <p className="text-sm font-medium text-gray-600">
                      {searchQuery
                        ? `"${searchQuery}"에 대한 컴포넌트를 찾을 수 없습니다`
                        : "이 카테고리에 컴포넌트가 없습니다"}
                    </p>
                    <p className="text-xs text-gray-400 mt-1">검색어나 필터를 조정해보세요</p>
                  </div>
                </div>
              )}
            </TabsContent>
          </div>
        </Tabs>

        {/* 통계 정보 */}
        <div className="mt-6 rounded-xl bg-gradient-to-r from-purple-50 to-pink-50 border border-purple-100/60 p-4">
          <div className="grid grid-cols-2 gap-4 text-center">
            <div>
              <div className="text-lg font-bold text-emerald-600">{filteredComponents.length}</div>
              <div className="text-xs text-gray-500">필터됨</div>
            </div>
            <div>
              <div className="text-lg font-bold text-purple-600">{allComponents.length}</div>
              <div className="text-xs text-gray-500">전체</div>
            </div>
          </div>
        </div>

        {/* 개발 정보 (개발 모드에서만) */}
        {process.env.NODE_ENV === "development" && (
          <div className="mt-4 rounded-xl bg-gradient-to-r from-gray-50 to-slate-50 border border-gray-100/60 p-4">
            <div className="space-y-1 text-xs text-gray-600">
              <div className="flex items-center space-x-2">
                <span className="w-2 h-2 bg-blue-500 rounded-full"></span>
                <span>레지스트리 기반 시스템</span>
              </div>
              <div className="flex items-center space-x-2">
                <span className="w-2 h-2 bg-green-500 rounded-full"></span>
                <span>Hot Reload 지원</span>
              </div>
              <div className="flex items-center space-x-2">
                <span className="w-2 h-2 bg-purple-500 rounded-full"></span>
                <span>완전한 타입 안전성</span>
              </div>
            </div>
          </div>
        )}
      </div>
    </div>
  );
}

export default ComponentsPanel;