"use client";

import { useState, useEffect } from "react";
import { toast } from "sonner";
import { Loader2 } from "lucide-react";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from "@/components/ui/dialog";
import { Button } from "@/components/ui/button";
import { Label } from "@/components/ui/label";
import { Input } from "@/components/ui/input";
import { Checkbox } from "@/components/ui/checkbox";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import { menuApi, MenuCopyResult } from "@/lib/api/menu";
import { apiClient } from "@/lib/api/client";

interface MenuCopyDialogProps {
  menuObjid: number | null;
  menuName: string | null;
  open: boolean;
  onOpenChange: (open: boolean) => void;
  onCopyComplete?: () => void;
}

interface Company {
  company_code: string;
  company_name: string;
}

export function MenuCopyDialog({
  menuObjid,
  menuName,
  open,
  onOpenChange,
  onCopyComplete,
}: MenuCopyDialogProps) {
  const [targetCompanyCode, setTargetCompanyCode] = useState("");
  const [companies, setCompanies] = useState<Company[]>([]);
  const [copying, setCopying] = useState(false);
  const [result, setResult] = useState<MenuCopyResult | null>(null);
  const [loadingCompanies, setLoadingCompanies] = useState(false);

  // 화면명 일괄 변경 설정
  const [useBulkRename, setUseBulkRename] = useState(false);
  const [removeText, setRemoveText] = useState("");
  const [addPrefix, setAddPrefix] = useState("");

  // 회사 목록 로드
  useEffect(() => {
    if (open) {
      loadCompanies();
      // 다이얼로그가 열릴 때마다 초기화
      setTargetCompanyCode("");
      setResult(null);
      setUseBulkRename(false);
      setRemoveText("");
      setAddPrefix("");
    }
  }, [open]);

  const loadCompanies = async () => {
    try {
      setLoadingCompanies(true);
      const response = await apiClient.get("/admin/companies/db");
      if (response.data.success && response.data.data) {
        // 최고 관리자(*) 회사 제외
        const filteredCompanies = response.data.data.filter(
          (company: Company) => company.company_code !== "*"
        );
        setCompanies(filteredCompanies);
      }
    } catch (error) {
      console.error("회사 목록 조회 실패:", error);
      toast.error("회사 목록을 불러올 수 없습니다");
    } finally {
      setLoadingCompanies(false);
    }
  };

  const handleCopy = async () => {
    if (!menuObjid) {
      toast.error("메뉴를 선택해주세요");
      return;
    }

    if (!targetCompanyCode) {
      toast.error("대상 회사를 선택해주세요");
      return;
    }

    setCopying(true);
    setResult(null);

    try {
      // 화면명 변환 설정 (사용 중일 때만 전달)
      const screenNameConfig =
        useBulkRename && (removeText.trim() || addPrefix.trim())
          ? {
              removeText: removeText.trim() || undefined,
              addPrefix: addPrefix.trim() || undefined,
            }
          : undefined;

      const response = await menuApi.copyMenu(
        menuObjid,
        targetCompanyCode,
        screenNameConfig
      );

      if (response.success && response.data) {
        setResult(response.data);
        toast.success("메뉴 복사 완료!");

        // 경고 메시지 표시
        if (response.data.warnings && response.data.warnings.length > 0) {
          response.data.warnings.forEach((warning) => {
            toast.warning(warning);
          });
        }

        // 복사 완료 콜백
        if (onCopyComplete) {
          onCopyComplete();
        }
      } else {
        toast.error(response.message || "메뉴 복사 실패");
      }
    } catch (error: any) {
      console.error("메뉴 복사 오류:", error);
      toast.error(error.message || "메뉴 복사 중 오류가 발생했습니다");
    } finally {
      setCopying(false);
    }
  };

  const handleClose = () => {
    if (!copying) {
      onOpenChange(false);
    }
  };

  return (
    <Dialog open={open} onOpenChange={handleClose}>
      <DialogContent className="max-w-[95vw] sm:max-w-[500px]">
        <DialogHeader>
          <DialogTitle className="text-base sm:text-lg">
            메뉴 복사
          </DialogTitle>
          <DialogDescription className="text-xs sm:text-sm">
            "{menuName}" 메뉴와 관련된 모든 리소스를 다른 회사로 복사합니다.
          </DialogDescription>
        </DialogHeader>

        <div className="space-y-3 sm:space-y-4">
          {/* 회사 선택 */}
          {!result && (
            <div>
              <Label htmlFor="company" className="text-xs sm:text-sm">
                대상 회사 *
              </Label>
              <Select
                value={targetCompanyCode}
                onValueChange={setTargetCompanyCode}
                disabled={copying || loadingCompanies}
              >
                <SelectTrigger
                  id="company"
                  className="h-8 text-xs sm:h-10 sm:text-sm"
                >
                  <SelectValue placeholder="회사 선택" />
                </SelectTrigger>
                <SelectContent>
                  {loadingCompanies ? (
                    <div className="flex items-center justify-center p-2 text-xs text-muted-foreground">
                      <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                      로딩 중...
                    </div>
                  ) : companies.length === 0 ? (
                    <div className="p-2 text-xs text-muted-foreground text-center">
                      사용 가능한 회사가 없습니다
                    </div>
                  ) : (
                    companies.map((company) => (
                      <SelectItem
                        key={company.company_code}
                        value={company.company_code}
                        className="text-xs sm:text-sm"
                      >
                        {company.company_name} ({company.company_code})
                      </SelectItem>
                    ))
                  )}
                </SelectContent>
              </Select>
            </div>
          )}

          {/* 화면명 일괄 변경 설정 */}
          {!result && (
            <div className="space-y-3">
              <div className="flex items-center gap-2">
                <Checkbox
                  id="useBulkRename"
                  checked={useBulkRename}
                  onCheckedChange={(checked) => setUseBulkRename(checked as boolean)}
                  disabled={copying}
                />
                <Label
                  htmlFor="useBulkRename"
                  className="text-xs sm:text-sm font-medium cursor-pointer"
                >
                  화면명 일괄 변경 사용
                </Label>
              </div>

              {useBulkRename && (
                <div className="space-y-3 pl-6 border-l-2">
                  <div>
                    <Label htmlFor="removeText" className="text-xs sm:text-sm">
                      제거할 텍스트
                    </Label>
                    <Input
                      id="removeText"
                      value={removeText}
                      onChange={(e) => setRemoveText(e.target.value)}
                      placeholder="예: 탑씰"
                      disabled={copying}
                      className="h-8 text-xs sm:h-10 sm:text-sm"
                    />
                    <p className="text-muted-foreground mt-1 text-[10px] sm:text-xs">
                      화면명에서 이 텍스트를 제거합니다 (예: "탑씰 회사정보" → "회사정보")
                    </p>
                  </div>

                  <div>
                    <Label htmlFor="addPrefix" className="text-xs sm:text-sm">
                      추가할 접두사
                    </Label>
                    <Input
                      id="addPrefix"
                      value={addPrefix}
                      onChange={(e) => setAddPrefix(e.target.value)}
                      placeholder="예: 한신"
                      disabled={copying}
                      className="h-8 text-xs sm:h-10 sm:text-sm"
                    />
                    <p className="text-muted-foreground mt-1 text-[10px] sm:text-xs">
                      화면명 앞에 이 텍스트를 추가합니다 (예: "회사정보" → "한신 회사정보")
                    </p>
                  </div>
                </div>
              )}
            </div>
          )}

          {/* 복사 항목 안내 */}
          {!result && (
            <div className="rounded-md border p-3 text-xs">
              <p className="font-medium mb-2">복사되는 항목:</p>
              <ul className="list-disc list-inside space-y-1 text-muted-foreground">
                <li>메뉴 구조 (하위 메뉴 포함)</li>
                <li>화면 + 레이아웃 (모달, 조건부 컨테이너)</li>
                <li>플로우 제어 (스텝, 연결)</li>
                <li>코드 카테고리 + 코드</li>
                <li>카테고리 설정 + 채번 규칙</li>
              </ul>
              <p className="mt-2 text-warning">
                ⚠️ 실제 데이터는 복사되지 않습니다.
              </p>
            </div>
          )}

          {/* 복사 결과 */}
          {result && (
            <div className="rounded-md border border-success bg-success/10 p-3 text-xs space-y-2">
              <p className="font-medium text-success">✅ 복사 완료!</p>
              <div className="grid grid-cols-2 gap-2">
                <div>
                  <span className="text-muted-foreground">메뉴:</span>{" "}
                  <span className="font-medium">{result.copiedMenus}개</span>
                </div>
                <div>
                  <span className="text-muted-foreground">화면:</span>{" "}
                  <span className="font-medium">{result.copiedScreens}개</span>
                </div>
                <div>
                  <span className="text-muted-foreground">플로우:</span>{" "}
                  <span className="font-medium">{result.copiedFlows}개</span>
                </div>
                <div>
                  <span className="text-muted-foreground">코드 카테고리:</span>{" "}
                  <span className="font-medium">{result.copiedCategories}개</span>
                </div>
                <div className="col-span-2">
                  <span className="text-muted-foreground">코드:</span>{" "}
                  <span className="font-medium">{result.copiedCodes}개</span>
                </div>
              </div>
            </div>
          )}
        </div>

        <DialogFooter className="gap-2 sm:gap-0">
          <Button
            variant="outline"
            onClick={handleClose}
            disabled={copying}
            className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
          >
            {result ? "닫기" : "취소"}
          </Button>
          {!result && (
            <Button
              onClick={handleCopy}
              disabled={copying || !targetCompanyCode || loadingCompanies}
              className="h-8 flex-1 text-xs sm:h-10 sm:flex-none sm:text-sm"
            >
              {copying ? (
                <>
                  <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                  복사 중...
                </>
              ) : (
                "복사 시작"
              )}
            </Button>
          )}
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}