import { Key, History, Edit } from "lucide-react";
import { useState } from "react";
import { User } from "@/types/user";
import { USER_TABLE_COLUMNS } from "@/constants/user";
import { Button } from "@/components/ui/button";
import { Switch } from "@/components/ui/switch";
import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";
import { PaginationInfo } from "@/components/common/Pagination";
import { UserStatusConfirmDialog } from "./UserStatusConfirmDialog";
import { UserHistoryModal } from "./UserHistoryModal";

interface UserTableProps {
  users: User[];
  isLoading: boolean;
  paginationInfo: PaginationInfo;
  onStatusToggle: (user: User, newStatus: string) => void;
  onPasswordReset: (userId: string, userName: string) => void;
  onEdit: (user: User) => void;
}

/**
 * 사용자 목록 테이블 컴포넌트
 */
export function UserTable({
  users,
  isLoading,
  paginationInfo,
  onStatusToggle,
  onPasswordReset,
  onEdit,
}: UserTableProps) {
  // 확인 모달 상태 관리
  const [confirmDialog, setConfirmDialog] = useState<{
    isOpen: boolean;
    user: User | null;
    newStatus: string;
  }>({
    isOpen: false,
    user: null,
    newStatus: "",
  });

  // 히스토리 모달 상태 관리
  const [historyModal, setHistoryModal] = useState<{
    isOpen: boolean;
    userId: string;
    userName: string;
  }>({
    isOpen: false,
    userId: "",
    userName: "",
  });

  // NO 컬럼 계산 함수 (페이지네이션 고려)
  const getRowNumber = (index: number) => {
    return paginationInfo.startItem + index;
  };

  // 날짜 포맷팅 함수
  const formatDate = (dateString: string) => {
    if (!dateString) return "-";
    return dateString.split(" ")[0]; // "2024-01-15 14:30:00" -> "2024-01-15"
  };

  // 상태 토글 핸들러 (확인 모달 표시)
  const handleStatusToggle = (user: User, checked: boolean) => {
    const newStatus = checked ? "active" : "inactive";
    setConfirmDialog({
      isOpen: true,
      user,
      newStatus,
    });
  };

  // 상태 변경 확인
  const handleConfirmStatusChange = () => {
    if (confirmDialog.user) {
      onStatusToggle(confirmDialog.user, confirmDialog.newStatus);
    }
    setConfirmDialog({ isOpen: false, user: null, newStatus: "" });
  };

  // 상태 변경 취소
  const handleCancelStatusChange = () => {
    setConfirmDialog({ isOpen: false, user: null, newStatus: "" });
  };

  // 변경이력 모달 열기
  const handleOpenHistoryModal = (user: User) => {
    setHistoryModal({
      isOpen: true,
      userId: user.userId,
      userName: user.userName || user.userId,
    });
  };

  // 변경이력 모달 닫기
  const handleCloseHistoryModal = () => {
    setHistoryModal({
      isOpen: false,
      userId: "",
      userName: "",
    });
  };

  // 로딩 상태 렌더링
  if (isLoading) {
    return (
      <>
        {/* 데스크톱 테이블 스켈레톤 */}
        <div className="bg-card hidden shadow-sm lg:block">
          <Table>
            <TableHeader>
              <TableRow>
                {USER_TABLE_COLUMNS.map((column) => (
                  <TableHead key={column.key} style={{ width: column.width }} className="h-12 px-6 py-3 text-sm font-semibold">
                    {column.label}
                  </TableHead>
                ))}
                <TableHead className="h-12 px-6 py-3 w-[200px] text-sm font-semibold">작업</TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              {Array.from({ length: 10 }).map((_, index) => (
                <TableRow key={index}>
                  {USER_TABLE_COLUMNS.map((column) => (
                    <TableCell key={column.key} className="h-16">
                      <div className="bg-muted h-4 animate-pulse rounded"></div>
                    </TableCell>
                  ))}
                  <TableCell className="h-16">
                    <div className="flex gap-2">
                      {Array.from({ length: 2 }).map((_, i) => (
                        <div key={i} className="bg-muted h-8 w-8 animate-pulse rounded"></div>
                      ))}
                    </div>
                  </TableCell>
                </TableRow>
              ))}
            </TableBody>
          </Table>
        </div>

        {/* 모바일/태블릿 카드 스켈레톤 */}
        <div className="grid gap-4 sm:grid-cols-2 lg:hidden">
          {Array.from({ length: 6 }).map((_, index) => (
            <div key={index} className="bg-card rounded-lg border p-4 shadow-sm">
              <div className="mb-4 flex items-start justify-between">
                <div className="flex-1 space-y-2">
                  <div className="bg-muted h-5 w-32 animate-pulse rounded"></div>
                  <div className="bg-muted h-4 w-24 animate-pulse rounded"></div>
                </div>
                <div className="bg-muted h-6 w-11 animate-pulse rounded-full"></div>
              </div>
              <div className="space-y-2 border-t pt-4">
                {Array.from({ length: 5 }).map((_, i) => (
                  <div key={i} className="flex justify-between">
                    <div className="bg-muted h-4 w-16 animate-pulse rounded"></div>
                    <div className="bg-muted h-4 w-32 animate-pulse rounded"></div>
                  </div>
                ))}
              </div>
              <div className="mt-4 flex gap-2 border-t pt-4">
                <div className="bg-muted h-9 flex-1 animate-pulse rounded"></div>
                <div className="bg-muted h-9 flex-1 animate-pulse rounded"></div>
              </div>
            </div>
          ))}
        </div>
      </>
    );
  }

  // 데이터가 없을 때
  if (users.length === 0) {
    return (
      <div className="bg-card flex h-64 flex-col items-center justify-center shadow-sm">
        <div className="flex flex-col items-center gap-2 text-center">
          <p className="text-muted-foreground text-sm">등록된 사용자가 없습니다.</p>
        </div>
      </div>
    );
  }

  // 실제 데이터 렌더링
  return (
    <>
      {/* 데스크톱 테이블 뷰 (lg 이상) */}
      <div className="bg-card hidden lg:block">
        <Table>
            <TableHeader>
              <TableRow>
                {USER_TABLE_COLUMNS.map((column) => (
                  <TableHead key={column.key} style={{ width: column.width }} className="h-12 px-6 py-3 text-sm font-semibold">
                    {column.label}
                  </TableHead>
                ))}
                <TableHead className="h-12 px-6 py-3 w-[200px] text-sm font-semibold">작업</TableHead>
              </TableRow>
            </TableHeader>
          <TableBody>
            {users.map((user, index) => (
              <TableRow key={`${user.userId}-${index}`} className="bg-background transition-colors hover:bg-muted/50">
                <TableCell className="h-16 px-6 py-3 font-mono text-sm font-medium">{getRowNumber(index)}</TableCell>
                <TableCell className="h-16 px-6 py-3 font-mono text-sm">{user.sabun || "-"}</TableCell>
                <TableCell className="h-16 px-6 py-3 text-sm font-medium">{user.companyCode || "-"}</TableCell>
                <TableCell className="h-16 px-6 py-3 text-sm font-medium">{user.deptName || "-"}</TableCell>
                <TableCell className="h-16 px-6 py-3 text-sm font-medium">{user.positionName || "-"}</TableCell>
                <TableCell className="h-16 px-6 py-3 font-mono text-sm">{user.userId}</TableCell>
                <TableCell className="h-16 px-6 py-3 text-sm font-medium">{user.userName}</TableCell>
                <TableCell className="h-16 px-6 py-3 text-sm">{user.tel || user.cellPhone || "-"}</TableCell>
                <TableCell className="h-16 px-6 py-3 max-w-[200px] truncate text-sm" title={user.email}>
                  {user.email || "-"}
                </TableCell>
                <TableCell className="h-16 px-6 py-3 text-sm">{formatDate(user.regDate || "")}</TableCell>
                <TableCell className="h-16 px-6 py-3">
                  <div className="flex items-center">
                    <Switch
                      checked={user.status === "active"}
                      onCheckedChange={(checked) => handleStatusToggle(user, checked)}
                      aria-label={`${user.userName} 상태 토글`}
                    />
                  </div>
                </TableCell>
                <TableCell className="h-16 px-6 py-3">
                  <div className="flex gap-2">
                    <Button
                      variant="ghost"
                      size="icon"
                      onClick={() => onEdit(user)}
                      className="h-8 w-8"
                      title="사용자 정보 수정"
                    >
                      <Edit className="h-4 w-4" />
                    </Button>
                    <Button
                      variant="ghost"
                      size="icon"
                      onClick={() => onPasswordReset(user.userId, user.userName || user.userId)}
                      className="h-8 w-8"
                      title="비밀번호 초기화"
                    >
                      <Key className="h-4 w-4" />
                    </Button>
                    <Button
                      variant="ghost"
                      size="icon"
                      onClick={() => handleOpenHistoryModal(user)}
                      className="h-8 w-8"
                      title="변경이력 조회"
                    >
                      <History className="h-4 w-4" />
                    </Button>
                  </div>
                </TableCell>
              </TableRow>
            ))}
          </TableBody>
        </Table>
      </div>

      {/* 모바일/태블릿 카드 뷰 (lg 미만) */}
      <div className="grid gap-4 sm:grid-cols-2 lg:hidden">
        {users.map((user, index) => (
          <div
            key={`${user.userId}-${index}`}
            className="bg-card hover:bg-muted/50 rounded-lg border p-4 shadow-sm transition-colors"
          >
            {/* 헤더: 이름과 상태 */}
            <div className="mb-4 flex items-start justify-between">
              <div className="flex-1">
                <h3 className="text-base font-semibold">{user.userName}</h3>
                <p className="text-muted-foreground mt-1 font-mono text-sm">{user.userId}</p>
              </div>
              <Switch
                checked={user.status === "active"}
                onCheckedChange={(checked) => handleStatusToggle(user, checked)}
                aria-label={`${user.userName} 상태 토글`}
              />
            </div>

            {/* 정보 그리드 */}
            <div className="space-y-2 border-t pt-4">
              {user.sabun && (
                <div className="flex justify-between text-sm">
                  <span className="text-muted-foreground">사번</span>
                  <span className="font-mono font-medium">{user.sabun}</span>
                </div>
              )}
              {user.companyCode && (
                <div className="flex justify-between text-sm">
                  <span className="text-muted-foreground">회사</span>
                  <span className="font-medium">{user.companyCode}</span>
                </div>
              )}
              {user.deptName && (
                <div className="flex justify-between text-sm">
                  <span className="text-muted-foreground">부서</span>
                  <span className="font-medium">{user.deptName}</span>
                </div>
              )}
              {user.positionName && (
                <div className="flex justify-between text-sm">
                  <span className="text-muted-foreground">직책</span>
                  <span className="font-medium">{user.positionName}</span>
                </div>
              )}
              {(user.tel || user.cellPhone) && (
                <div className="flex justify-between text-sm">
                  <span className="text-muted-foreground">연락처</span>
                  <span>{user.tel || user.cellPhone}</span>
                </div>
              )}
              {user.email && (
                <div className="flex flex-col gap-1 text-sm">
                  <span className="text-muted-foreground">이메일</span>
                  <span className="break-all">{user.email}</span>
                </div>
              )}
              <div className="flex justify-between text-sm">
                <span className="text-muted-foreground">등록일</span>
                <span>{formatDate(user.regDate || "")}</span>
              </div>
            </div>

            {/* 액션 버튼 */}
            <div className="mt-4 flex gap-2 border-t pt-4">
              <Button variant="outline" size="sm" onClick={() => onEdit(user)} className="h-9 flex-1 gap-2 text-sm">
                <Edit className="h-4 w-4" />
                수정
              </Button>
              <Button
                variant="outline"
                size="sm"
                onClick={() => onPasswordReset(user.userId, user.userName || user.userId)}
                className="h-9 w-9 p-0"
                title="비밀번호 초기화"
              >
                <Key className="h-4 w-4" />
              </Button>
              <Button
                variant="outline"
                size="sm"
                onClick={() => handleOpenHistoryModal(user)}
                className="h-9 w-9 p-0"
                title="변경이력"
              >
                <History className="h-4 w-4" />
              </Button>
            </div>
          </div>
        ))}
      </div>

      {/* 상태 변경 확인 모달 */}
      <UserStatusConfirmDialog
        user={confirmDialog.user}
        newStatus={confirmDialog.newStatus}
        isOpen={confirmDialog.isOpen}
        onConfirm={handleConfirmStatusChange}
        onCancel={handleCancelStatusChange}
      />

      {/* 사용자 변경이력 모달 */}
      <UserHistoryModal
        isOpen={historyModal.isOpen}
        onClose={handleCloseHistoryModal}
        userId={historyModal.userId}
        userName={historyModal.userName}
      />
    </>
  );
}