import { useState } from "react";
import { CompanyModalState, CompanyFormData } from "@/types/company";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter } from "@/components/ui/dialog";
import { LoadingSpinner } from "@/components/common/LoadingSpinner";
import { validateBusinessNumber, formatBusinessNumber } from "@/lib/validation/businessNumber";

interface CompanyFormModalProps {
  modalState: CompanyModalState;
  isLoading: boolean;
  error: string | null;
  onClose: () => void;
  onSave: () => Promise<boolean>;
  onFormChange: (field: keyof CompanyFormData, value: string) => void;
  onClearError: () => void;
}

/**
 * 회사 등록/수정 모달 컴포넌트
 */
export function CompanyFormModal({
  modalState,
  isLoading,
  error,
  onClose,
  onSave,
  onFormChange,
  onClearError,
}: CompanyFormModalProps) {
  const [isSaving, setIsSaving] = useState(false);
  const [businessNumberError, setBusinessNumberError] = useState<string>("");

  // 모달이 열려있지 않으면 렌더링하지 않음
  if (!modalState.isOpen) return null;

  const { mode, formData, selectedCompany } = modalState;
  const isEditMode = mode === "edit";

  // 사업자등록번호 변경 처리
  const handleBusinessNumberChange = (value: string) => {
    // 자동 포맷팅
    const formatted = formatBusinessNumber(value);
    onFormChange("business_registration_number", formatted);

    // 유효성 검사 (10자리가 다 입력되었을 때만)
    const cleaned = formatted.replace(/-/g, "");
    if (cleaned.length === 10) {
      const validation = validateBusinessNumber(formatted);
      setBusinessNumberError(validation.isValid ? "" : validation.message);
    } else if (cleaned.length < 10 && businessNumberError) {
      // 10자리 미만이면 에러 초기화
      setBusinessNumberError("");
    }
  };

  // 저장 처리
  const handleSave = async () => {
    // 입력값 검증 (필수 필드)
    if (!formData.company_name.trim()) {
      return;
    }
    if (!formData.business_registration_number.trim()) {
      return;
    }

    // 사업자등록번호 최종 검증
    const validation = validateBusinessNumber(formData.business_registration_number);
    if (!validation.isValid) {
      setBusinessNumberError(validation.message);
      return;
    }

    setIsSaving(true);
    onClearError();
    setBusinessNumberError("");

    try {
      const success = await onSave();
      if (success) {
        // 성공 시 모달 닫기
        onClose();
      }
    } catch (err) {
      // 에러는 부모 컴포넌트에서 처리
    } finally {
      setIsSaving(false);
    }
  };

  // 취소 처리
  const handleCancel = () => {
    onClearError();
    onClose();
  };

  // Enter 키 처리
  const handleKeyDown = (e: React.KeyboardEvent) => {
    if (e.key === "Enter" && !isLoading && !isSaving) {
      e.preventDefault();
      handleSave();
    }
  };

  return (
    <Dialog open={modalState.isOpen} onOpenChange={handleCancel}>
      <DialogContent className="sm:max-w-[425px]" onKeyDown={handleKeyDown}>
        <DialogHeader>
          <DialogTitle>{isEditMode ? "회사 정보 수정" : "새 회사 등록"}</DialogTitle>
        </DialogHeader>

        <div className="space-y-4 py-4">
          {/* 회사명 입력 (필수) */}
          <div className="space-y-2">
            <Label htmlFor="company_name">
              회사명 <span className="text-destructive">*</span>
            </Label>
            <Input
              id="company_name"
              value={formData.company_name}
              onChange={(e) => onFormChange("company_name", e.target.value)}
              placeholder="회사명을 입력하세요"
              disabled={isLoading || isSaving}
              className={error ? "border-destructive" : ""}
              autoFocus
            />
          </div>

          {/* 사업자등록번호 입력 (필수) */}
          <div className="space-y-2">
            <Label htmlFor="business_registration_number">
              사업자등록번호 <span className="text-destructive">*</span>
            </Label>
            <Input
              id="business_registration_number"
              value={formData.business_registration_number || ""}
              onChange={(e) => handleBusinessNumberChange(e.target.value)}
              placeholder="000-00-00000"
              disabled={isLoading || isSaving}
              maxLength={12}
              className={businessNumberError ? "border-destructive" : ""}
            />
            {businessNumberError ? (
              <p className="text-xs text-destructive">{businessNumberError}</p>
            ) : (
              <p className="text-xs text-muted-foreground">10자리 숫자 (자동 하이픈 추가)</p>
            )}
          </div>

          {/* 대표자명 입력 */}
          <div className="space-y-2">
            <Label htmlFor="representative_name">대표자명</Label>
            <Input
              id="representative_name"
              value={formData.representative_name || ""}
              onChange={(e) => onFormChange("representative_name", e.target.value)}
              placeholder="대표자명을 입력하세요"
              disabled={isLoading || isSaving}
            />
          </div>

          {/* 대표 연락처 입력 */}
          <div className="space-y-2">
            <Label htmlFor="representative_phone">대표 연락처</Label>
            <Input
              id="representative_phone"
              value={formData.representative_phone || ""}
              onChange={(e) => onFormChange("representative_phone", e.target.value)}
              placeholder="010-0000-0000"
              disabled={isLoading || isSaving}
              type="tel"
            />
          </div>

          {/* 이메일 입력 */}
          <div className="space-y-2">
            <Label htmlFor="email">이메일</Label>
            <Input
              id="email"
              value={formData.email || ""}
              onChange={(e) => onFormChange("email", e.target.value)}
              placeholder="company@example.com"
              disabled={isLoading || isSaving}
              type="email"
            />
          </div>

          {/* 웹사이트 입력 */}
          <div className="space-y-2">
            <Label htmlFor="website">웹사이트</Label>
            <Input
              id="website"
              value={formData.website || ""}
              onChange={(e) => onFormChange("website", e.target.value)}
              placeholder="https://example.com"
              disabled={isLoading || isSaving}
              type="url"
            />
          </div>

          {/* 회사 주소 입력 */}
          <div className="space-y-2">
            <Label htmlFor="address">회사 주소</Label>
            <Input
              id="address"
              value={formData.address || ""}
              onChange={(e) => onFormChange("address", e.target.value)}
              placeholder="서울특별시 강남구..."
              disabled={isLoading || isSaving}
            />
          </div>

          {/* 에러 메시지 */}
          {error && (
            <div className="rounded-md bg-destructive/10 p-3">
              <p className="text-sm text-destructive">{error}</p>
            </div>
          )}

          {/* 수정 모드일 때 추가 정보 표시 */}
          {isEditMode && modalState.selectedCompany && (
            <div className="bg-muted/50 rounded-md p-3">
              <div className="space-y-1 text-sm">
                <p>
                  <span className="font-medium">회사 코드:</span> {modalState.selectedCompany.company_code}
                </p>
                <p>
                  <span className="font-medium">등록자:</span> {modalState.selectedCompany.writer}
                </p>
                <p>
                  <span className="font-medium">등록일:</span>{" "}
                  {new Date(modalState.selectedCompany.regdate).toLocaleDateString("ko-KR")}
                </p>
              </div>
            </div>
          )}
        </div>

        <DialogFooter>
          <Button variant="outline" onClick={handleCancel} disabled={isLoading || isSaving}>
            취소
          </Button>
          <Button
            onClick={handleSave}
            disabled={
              isLoading ||
              isSaving ||
              !formData.company_name.trim() ||
              !formData.business_registration_number.trim() ||
              !!businessNumberError
            }
            className="min-w-[80px]"
          >
            {(isLoading || isSaving) && <LoadingSpinner className="mr-2 h-4 w-4" />}
            {isEditMode ? "수정" : "등록"}
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  );
}