"use client";

import React, { useMemo, useCallback } from "react";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Checkbox } from "@/components/ui/checkbox";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import { Separator } from "@/components/ui/separator";
import { FileUploadConfig } from "./types";
import { V2FileUploadDefaultConfig } from "./config";

export interface FileUploadConfigPanelProps {
  config: FileUploadConfig;
  onChange: (config: Partial<FileUploadConfig>) => void;
  screenTableName?: string;
}

/**
 * V2 FileUpload 설정 패널
 * 컴포넌트의 설정값들을 편집할 수 있는 UI 제공
 */
export const FileUploadConfigPanel: React.FC<FileUploadConfigPanelProps> = ({
  config: propConfig,
  onChange,
  screenTableName,
}) => {
  // config 안전하게 초기화 (useMemo)
  const config = useMemo(() => ({
    ...V2FileUploadDefaultConfig,
    ...propConfig,
  }), [propConfig]);

  // 핸들러
  const handleChange = useCallback(<K extends keyof FileUploadConfig>(
    key: K, 
    value: FileUploadConfig[K]
  ) => {
    onChange({ [key]: value });
  }, [onChange]);

  // 파일 크기를 MB 단위로 변환
  const maxSizeMB = useMemo(() => {
    return (config.maxSize || 10 * 1024 * 1024) / (1024 * 1024);
  }, [config.maxSize]);

  const handleMaxSizeChange = useCallback((value: string) => {
    const mb = parseFloat(value) || 10;
    handleChange("maxSize", mb * 1024 * 1024);
  }, [handleChange]);

  return (
    <div className="space-y-4 p-4">
      <div className="text-sm font-medium text-muted-foreground">
        V2 파일 업로드 설정
      </div>

      <Separator />

      {/* 기본 설정 */}
      <div className="space-y-3">
        <Label className="text-xs font-semibold uppercase text-muted-foreground">
          기본 설정
        </Label>
        
        <div className="space-y-2">
          <Label htmlFor="placeholder" className="text-xs">플레이스홀더</Label>
          <Input
            id="placeholder"
            value={config.placeholder || ""}
            onChange={(e) => handleChange("placeholder", e.target.value)}
            placeholder="파일을 선택하세요"
            className="h-8 text-xs"
          />
        </div>

        <div className="space-y-2">
          <Label htmlFor="accept" className="text-xs">허용 파일 형식</Label>
          <Select
            value={config.accept || "*/*"}
            onValueChange={(value) => handleChange("accept", value)}
          >
            <SelectTrigger className="h-8 text-xs">
              <SelectValue placeholder="파일 형식 선택" />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="*/*">모든 파일</SelectItem>
              <SelectItem value="image/*">이미지만</SelectItem>
              <SelectItem value=".pdf,.doc,.docx,.xls,.xlsx">문서만</SelectItem>
              <SelectItem value="image/*,.pdf">이미지 + PDF</SelectItem>
              <SelectItem value=".zip,.rar,.7z">압축 파일만</SelectItem>
            </SelectContent>
          </Select>
        </div>

        <div className="grid grid-cols-2 gap-2">
          <div className="space-y-2">
            <Label htmlFor="maxSize" className="text-xs">최대 크기 (MB)</Label>
            <Input
              id="maxSize"
              type="number"
              min={1}
              max={100}
              value={maxSizeMB}
              onChange={(e) => handleMaxSizeChange(e.target.value)}
              className="h-8 text-xs"
            />
          </div>
          <div className="space-y-2">
            <Label htmlFor="maxFiles" className="text-xs">최대 파일 수</Label>
            <Input
              id="maxFiles"
              type="number"
              min={1}
              max={50}
              value={config.maxFiles || 10}
              onChange={(e) => handleChange("maxFiles", parseInt(e.target.value) || 10)}
              className="h-8 text-xs"
            />
          </div>
        </div>
      </div>

      <Separator />

      {/* 동작 설정 */}
      <div className="space-y-3">
        <Label className="text-xs font-semibold uppercase text-muted-foreground">
          동작 설정
        </Label>
        
        <div className="flex items-center space-x-2">
          <Checkbox
            id="multiple"
            checked={config.multiple !== false}
            onCheckedChange={(checked) => handleChange("multiple", checked as boolean)}
          />
          <Label htmlFor="multiple" className="text-xs">다중 파일 선택 허용</Label>
        </div>

        <div className="flex items-center space-x-2">
          <Checkbox
            id="allowDelete"
            checked={config.allowDelete !== false}
            onCheckedChange={(checked) => handleChange("allowDelete", checked as boolean)}
          />
          <Label htmlFor="allowDelete" className="text-xs">파일 삭제 허용</Label>
        </div>

        <div className="flex items-center space-x-2">
          <Checkbox
            id="allowDownload"
            checked={config.allowDownload !== false}
            onCheckedChange={(checked) => handleChange("allowDownload", checked as boolean)}
          />
          <Label htmlFor="allowDownload" className="text-xs">파일 다운로드 허용</Label>
        </div>
      </div>

      <Separator />

      {/* 표시 설정 */}
      <div className="space-y-3">
        <Label className="text-xs font-semibold uppercase text-muted-foreground">
          표시 설정
        </Label>
        
        <div className="flex items-center space-x-2">
          <Checkbox
            id="showPreview"
            checked={config.showPreview !== false}
            onCheckedChange={(checked) => handleChange("showPreview", checked as boolean)}
          />
          <Label htmlFor="showPreview" className="text-xs">미리보기 표시</Label>
        </div>

        <div className="flex items-center space-x-2">
          <Checkbox
            id="showFileList"
            checked={config.showFileList !== false}
            onCheckedChange={(checked) => handleChange("showFileList", checked as boolean)}
          />
          <Label htmlFor="showFileList" className="text-xs">파일 목록 표시</Label>
        </div>

        <div className="flex items-center space-x-2">
          <Checkbox
            id="showFileSize"
            checked={config.showFileSize !== false}
            onCheckedChange={(checked) => handleChange("showFileSize", checked as boolean)}
          />
          <Label htmlFor="showFileSize" className="text-xs">파일 크기 표시</Label>
        </div>
      </div>

      <Separator />

      {/* 상태 설정 */}
      <div className="space-y-3">
        <Label className="text-xs font-semibold uppercase text-muted-foreground">
          상태 설정
        </Label>

        <div className="flex items-center space-x-2">
          <Checkbox
            id="required"
            checked={config.required || false}
            onCheckedChange={(checked) => handleChange("required", checked as boolean)}
          />
          <Label htmlFor="required" className="text-xs">필수 입력</Label>
        </div>

        <div className="flex items-center space-x-2">
          <Checkbox
            id="readonly"
            checked={config.readonly || false}
            onCheckedChange={(checked) => handleChange("readonly", checked as boolean)}
          />
          <Label htmlFor="readonly" className="text-xs">읽기 전용</Label>
        </div>

        <div className="flex items-center space-x-2">
          <Checkbox
            id="disabled"
            checked={config.disabled || false}
            onCheckedChange={(checked) => handleChange("disabled", checked as boolean)}
          />
          <Label htmlFor="disabled" className="text-xs">비활성화</Label>
        </div>
      </div>

      <Separator />

      {/* 스타일 설정 */}
      <div className="space-y-3">
        <Label className="text-xs font-semibold uppercase text-muted-foreground">
          스타일 설정
        </Label>

        <div className="space-y-2">
          <Label htmlFor="variant" className="text-xs">스타일 변형</Label>
          <Select
            value={config.variant || "default"}
            onValueChange={(value) => handleChange("variant", value as "default" | "outlined" | "filled")}
          >
            <SelectTrigger className="h-8 text-xs">
              <SelectValue placeholder="스타일 선택" />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="default">기본</SelectItem>
              <SelectItem value="outlined">테두리</SelectItem>
              <SelectItem value="filled">채움</SelectItem>
            </SelectContent>
          </Select>
        </div>

        <div className="space-y-2">
          <Label htmlFor="size" className="text-xs">크기</Label>
          <Select
            value={config.size || "md"}
            onValueChange={(value) => handleChange("size", value as "sm" | "md" | "lg")}
          >
            <SelectTrigger className="h-8 text-xs">
              <SelectValue placeholder="크기 선택" />
            </SelectTrigger>
            <SelectContent>
              <SelectItem value="sm">작게</SelectItem>
              <SelectItem value="md">보통</SelectItem>
              <SelectItem value="lg">크게</SelectItem>
            </SelectContent>
          </Select>
        </div>
      </div>

      {/* 도움말 */}
      <div className="space-y-2">
        <Label htmlFor="helperText" className="text-xs">도움말</Label>
        <Input
          id="helperText"
          value={config.helperText || ""}
          onChange={(e) => handleChange("helperText", e.target.value)}
          placeholder="파일 업로드에 대한 안내 문구"
          className="h-8 text-xs"
        />
      </div>
    </div>
  );
};
