"use client";

import React, { useState, useMemo } from "react";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Badge } from "@/components/ui/badge";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle,
  AlertDialogTrigger,
} from "@/components/ui/alert-dialog";
import { toast } from "sonner";
import { Plus, Search, Edit, Trash2, Eye, Filter, RotateCcw, Settings, SortAsc, SortDesc } from "lucide-react";
import { useWebTypes } from "@/hooks/admin/useWebTypes";
import Link from "next/link";

export default function WebTypesManagePage() {
  const [searchTerm, setSearchTerm] = useState("");
  const [categoryFilter, setCategoryFilter] = useState<string>("all");
  const [activeFilter, setActiveFilter] = useState<string>("Y");
  const [sortField, setSortField] = useState<string>("sort_order");
  const [sortDirection, setSortDirection] = useState<"asc" | "desc">("asc");

  // 웹타입 데이터 조회
  const { webTypes, isLoading, error, deleteWebType, isDeleting, deleteError, refetch } = useWebTypes({
    active: activeFilter === "all" ? undefined : activeFilter,
    search: searchTerm || undefined,
    category: categoryFilter === "all" ? undefined : categoryFilter,
  });

  // 카테고리 목록 생성
  const categories = useMemo(() => {
    const uniqueCategories = Array.from(new Set(webTypes.map((wt) => wt.category).filter(Boolean)));
    return uniqueCategories.sort();
  }, [webTypes]);

  // 필터링 및 정렬된 데이터
  const filteredAndSortedWebTypes = useMemo(() => {
    let filtered = [...webTypes];

    // 정렬
    filtered.sort((a, b) => {
      let aValue: any = a[sortField as keyof typeof a];
      let bValue: any = b[sortField as keyof typeof b];

      // 숫자 필드 처리
      if (sortField === "sort_order") {
        aValue = aValue || 0;
        bValue = bValue || 0;
      }

      // 문자열 필드 처리
      if (typeof aValue === "string") {
        aValue = aValue.toLowerCase();
      }
      if (typeof bValue === "string") {
        bValue = bValue.toLowerCase();
      }

      if (aValue < bValue) return sortDirection === "asc" ? -1 : 1;
      if (aValue > bValue) return sortDirection === "asc" ? 1 : -1;
      return 0;
    });

    return filtered;
  }, [webTypes, sortField, sortDirection]);

  // 정렬 변경 핸들러
  const handleSort = (field: string) => {
    if (sortField === field) {
      setSortDirection(sortDirection === "asc" ? "desc" : "asc");
    } else {
      setSortField(field);
      setSortDirection("asc");
    }
  };

  // 삭제 핸들러
  const handleDelete = async (webType: string, typeName: string) => {
    try {
      await deleteWebType(webType);
      toast.success(`웹타입 '${typeName}'이 삭제되었습니다.`);
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "삭제 중 오류가 발생했습니다.");
    }
  };

  // 필터 초기화
  const resetFilters = () => {
    setSearchTerm("");
    setCategoryFilter("all");
    setActiveFilter("Y");
    setSortField("sort_order");
    setSortDirection("asc");
  };

  // 로딩 상태
  if (isLoading) {
    return (
      <div className="flex h-96 items-center justify-center">
        <div className="text-lg">웹타입 목록을 불러오는 중...</div>
      </div>
    );
  }

  // 에러 상태
  if (error) {
    return (
      <div className="flex h-96 items-center justify-center">
        <div className="text-center">
          <div className="mb-2 text-lg text-red-600">웹타입 목록을 불러오는데 실패했습니다.</div>
          <Button onClick={() => refetch()} variant="outline">
            다시 시도
          </Button>
        </div>
      </div>
    );
  }

  return (
    <div className="min-h-screen bg-gray-50">
      <div className="w-full max-w-none px-4 py-8 space-y-8">
        {/* 페이지 제목 */}
        <div className="flex items-center justify-between bg-white rounded-lg shadow-sm border p-6">
          <div>
            <h1 className="text-3xl font-bold text-gray-900">웹타입 관리</h1>
            <p className="mt-2 text-gray-600">화면관리에서 사용할 웹타입들을 관리합니다</p>
          </div>
          <Link href="/admin/standards/new">
            <Button className="shadow-sm">
              <Plus className="mr-2 h-4 w-4" />새 웹타입 추가
            </Button>
          </Link>
        </div>

        {/* 필터 및 검색 */}
        <Card className="shadow-sm">
          <CardHeader className="bg-gray-50/50">
            <CardTitle className="flex items-center gap-2 text-lg">
              <Filter className="h-5 w-5 text-gray-600" />
              필터 및 검색
            </CardTitle>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="grid grid-cols-1 md:grid-cols-4 gap-4">
              {/* 검색 */}
              <div className="relative">
                <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-gray-400" />
                <Input
                  placeholder="웹타입명, 설명 검색..."
                  value={searchTerm}
                  onChange={(e) => setSearchTerm(e.target.value)}
                  className="pl-10"
                />
              </div>

              {/* 카테고리 필터 */}
              <Select value={categoryFilter} onValueChange={setCategoryFilter}>
                <SelectTrigger>
                  <SelectValue placeholder="카테고리 선택" />
                </SelectTrigger>
              <SelectContent>
                <SelectItem value="all">전체 카테고리</SelectItem>
                {categories.map((category) => (
                  <SelectItem key={category} value={category}>
                    {category}
                  </SelectItem>
                ))}
              </SelectContent>
            </Select>

              {/* 활성화 상태 필터 */}
              <Select value={activeFilter} onValueChange={setActiveFilter}>
                <SelectTrigger>
                  <SelectValue placeholder="상태 선택" />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="all">전체</SelectItem>
                  <SelectItem value="Y">활성화</SelectItem>
                  <SelectItem value="N">비활성화</SelectItem>
                </SelectContent>
              </Select>

              {/* 초기화 버튼 */}
              <Button variant="outline" onClick={resetFilters}>
                <RotateCcw className="mr-2 h-4 w-4" />
                초기화
              </Button>
          </div>
        </CardContent>
      </Card>

        {/* 결과 통계 */}
        <div className="bg-white rounded-lg border px-4 py-3">
          <p className="text-gray-700 text-sm font-medium">총 {filteredAndSortedWebTypes.length}개의 웹타입이 있습니다.</p>
        </div>

        {/* 웹타입 목록 테이블 */}
        <Card className="shadow-sm">
          <CardContent className="p-0">
            <Table>
              <TableHeader>
                <TableRow>
                  <TableHead className="hover:bg-muted/50 cursor-pointer" onClick={() => handleSort("sort_order")}>
                    <div className="flex items-center gap-2">
                      순서
                      {sortField === "sort_order" &&
                        (sortDirection === "asc" ? <SortAsc className="h-4 w-4" /> : <SortDesc className="h-4 w-4" />)}
                    </div>
                  </TableHead>
                  <TableHead className="hover:bg-muted/50 cursor-pointer" onClick={() => handleSort("web_type")}>
                    <div className="flex items-center gap-2">
                      웹타입 코드
                      {sortField === "web_type" &&
                        (sortDirection === "asc" ? <SortAsc className="h-4 w-4" /> : <SortDesc className="h-4 w-4" />)}
                    </div>
                  </TableHead>
                  <TableHead className="hover:bg-muted/50 cursor-pointer" onClick={() => handleSort("type_name")}>
                    <div className="flex items-center gap-2">
                      웹타입명
                      {sortField === "type_name" &&
                        (sortDirection === "asc" ? <SortAsc className="h-4 w-4" /> : <SortDesc className="h-4 w-4" />)}
                    </div>
                  </TableHead>
                  <TableHead className="hover:bg-muted/50 cursor-pointer" onClick={() => handleSort("category")}>
                    <div className="flex items-center gap-2">
                      카테고리
                      {sortField === "category" &&
                        (sortDirection === "asc" ? <SortAsc className="h-4 w-4" /> : <SortDesc className="h-4 w-4" />)}
                    </div>
                  </TableHead>
                  <TableHead>설명</TableHead>
                  <TableHead className="hover:bg-muted/50 cursor-pointer" onClick={() => handleSort("component_name")}>
                    <div className="flex items-center gap-2">
                      연결된 컴포넌트
                      {sortField === "component_name" &&
                        (sortDirection === "asc" ? <SortAsc className="h-4 w-4" /> : <SortDesc className="h-4 w-4" />)}
                    </div>
                  </TableHead>
                  <TableHead className="hover:bg-muted/50 cursor-pointer" onClick={() => handleSort("config_panel")}>
                    <div className="flex items-center gap-2">
                      설정 패널
                      {sortField === "config_panel" &&
                        (sortDirection === "asc" ? <SortAsc className="h-4 w-4" /> : <SortDesc className="h-4 w-4" />)}
                    </div>
                  </TableHead>
                  <TableHead className="hover:bg-muted/50 cursor-pointer" onClick={() => handleSort("is_active")}>
                    <div className="flex items-center gap-2">
                      상태
                      {sortField === "is_active" &&
                        (sortDirection === "asc" ? <SortAsc className="h-4 w-4" /> : <SortDesc className="h-4 w-4" />)}
                    </div>
                  </TableHead>
                  <TableHead className="hover:bg-muted/50 cursor-pointer" onClick={() => handleSort("updated_date")}>
                    <div className="flex items-center gap-2">
                      최종 수정일
                      {sortField === "updated_date" &&
                        (sortDirection === "asc" ? <SortAsc className="h-4 w-4" /> : <SortDesc className="h-4 w-4" />)}
                    </div>
                  </TableHead>
                  <TableHead className="text-center">작업</TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              {filteredAndSortedWebTypes.length === 0 ? (
                <TableRow>
                  <TableCell colSpan={10} className="py-8 text-center">
                    조건에 맞는 웹타입이 없습니다.
                  </TableCell>
                </TableRow>
              ) : (
                filteredAndSortedWebTypes.map((webType) => (
                  <TableRow key={webType.web_type}>
                    <TableCell className="font-mono">{webType.sort_order || 0}</TableCell>
                    <TableCell className="font-mono">{webType.web_type}</TableCell>
                    <TableCell className="font-medium">
                      {webType.type_name}
                      {webType.type_name_eng && (
                        <div className="text-muted-foreground text-xs">{webType.type_name_eng}</div>
                      )}
                    </TableCell>
                    <TableCell>
                      <Badge variant="secondary">{webType.category}</Badge>
                    </TableCell>
                    <TableCell className="max-w-xs truncate">{webType.description || "-"}</TableCell>
                    <TableCell>
                      <Badge variant="outline" className="font-mono text-xs">
                        {webType.component_name || "TextWidget"}
                      </Badge>
                    </TableCell>
                    <TableCell>
                      <Badge variant="secondary" className="font-mono text-xs">
                        {webType.config_panel === "none" || !webType.config_panel ? "기본 설정" : webType.config_panel}
                      </Badge>
                    </TableCell>
                    <TableCell>
                      <Badge variant={webType.is_active === "Y" ? "default" : "secondary"}>
                        {webType.is_active === "Y" ? "활성화" : "비활성화"}
                      </Badge>
                    </TableCell>
                    <TableCell className="text-muted-foreground text-sm">
                      {webType.updated_date ? new Date(webType.updated_date).toLocaleDateString("ko-KR") : "-"}
                    </TableCell>
                        <TableCell>
                          <div className="flex items-center gap-2">
                            <Link href={`/admin/standards/${webType.web_type}`}>
                              <Button variant="ghost" size="sm">
                                <Eye className="h-4 w-4" />
                              </Button>
                            </Link>
                            <Link href={`/admin/standards/${webType.web_type}/edit`}>
                              <Button variant="ghost" size="sm">
                                <Edit className="h-4 w-4" />
                              </Button>
                            </Link>
                            <AlertDialog>
                              <AlertDialogTrigger asChild>
                                <Button variant="ghost" size="sm">
                                  <Trash2 className="h-4 w-4 text-red-500" />
                                </Button>
                              </AlertDialogTrigger>
                          <AlertDialogContent>
                            <AlertDialogHeader>
                              <AlertDialogTitle>웹타입 삭제</AlertDialogTitle>
                              <AlertDialogDescription>
                                '{webType.type_name}' 웹타입을 삭제하시겠습니까?
                                <br />이 작업은 되돌릴 수 없습니다.
                              </AlertDialogDescription>
                            </AlertDialogHeader>
                            <AlertDialogFooter>
                              <AlertDialogCancel>취소</AlertDialogCancel>
                              <AlertDialogAction
                                onClick={() => handleDelete(webType.web_type, webType.type_name)}
                                disabled={isDeleting}
                                className="bg-red-600 hover:bg-red-700"
                              >
                                {isDeleting ? "삭제 중..." : "삭제"}
                              </AlertDialogAction>
                            </AlertDialogFooter>
                          </AlertDialogContent>
                        </AlertDialog>
                      </div>
                    </TableCell>
                  </TableRow>
                ))
              )}
            </TableBody>
          </Table>
        </CardContent>
      </Card>

      {deleteError && (
        <div className="mt-4 rounded-md border border-red-200 bg-red-50 p-4">
          <p className="text-red-600">
            삭제 중 오류가 발생했습니다: {deleteError instanceof Error ? deleteError.message : "알 수 없는 오류"}
          </p>
        </div>
      )}
      </div>
    </div>
  );
}
