"use client";

/**
 * 데이터 변환 노드
 */

import { memo } from "react";
import { Handle, Position, NodeProps } from "reactflow";
import { Wand2, ArrowRight } from "lucide-react";
import type { DataTransformNodeData } from "@/types/node-editor";

export const DataTransformNode = memo(({ data, selected }: NodeProps<DataTransformNodeData>) => {
  return (
    <div
      className={`min-w-[250px] rounded-lg border-2 bg-white shadow-md transition-all ${
        selected ? "border-orange-500 shadow-lg" : "border-gray-200"
      }`}
    >
      {/* 헤더 */}
      <div className="flex items-center gap-2 rounded-t-lg bg-indigo-600 px-3 py-2 text-white">
        <Wand2 className="h-4 w-4" />
        <div className="flex-1">
          <div className="text-sm font-semibold">{data.displayName || "데이터 변환"}</div>
          <div className="text-xs opacity-80">{data.transformations?.length || 0}개 변환</div>
        </div>
      </div>

      {/* 본문 */}
      <div className="p-3">
        {data.transformations && data.transformations.length > 0 ? (
          <div className="space-y-2">
            {data.transformations.slice(0, 3).map((transform, idx) => {
              const sourceLabel = transform.sourceFieldLabel || transform.sourceField || "소스";
              const targetField = transform.targetField || transform.sourceField;
              const targetLabel = transform.targetFieldLabel || targetField;
              const isInPlace = !transform.targetField || transform.targetField === transform.sourceField;

              return (
                <div key={idx} className="rounded bg-indigo-50 p-2">
                  <div className="mb-1 flex items-center gap-2 text-xs">
                    <span className="font-medium text-indigo-700">{transform.type}</span>
                  </div>
                  <div className="text-xs text-gray-600">
                    {sourceLabel}
                    <span className="mx-1 text-gray-400">→</span>
                    {isInPlace ? (
                      <span className="font-medium text-indigo-600">(자기자신)</span>
                    ) : (
                      <span>{targetLabel}</span>
                    )}
                  </div>
                  {/* 타입별 추가 정보 */}
                  {transform.type === "EXPLODE" && transform.delimiter && (
                    <div className="mt-1 text-xs text-gray-500">구분자: {transform.delimiter}</div>
                  )}
                  {transform.type === "CONCAT" && transform.separator && (
                    <div className="mt-1 text-xs text-gray-500">구분자: {transform.separator}</div>
                  )}
                  {transform.type === "REPLACE" && (
                    <div className="mt-1 text-xs text-gray-500">
                      "{transform.searchValue}" → "{transform.replaceValue}"
                    </div>
                  )}
                  {transform.expression && (
                    <div className="mt-1 text-xs text-gray-500">
                      <code className="rounded bg-white px-1 py-0.5">{transform.expression}</code>
                    </div>
                  )}
                </div>
              );
            })}
            {data.transformations.length > 3 && (
              <div className="text-xs text-gray-400">... 외 {data.transformations.length - 3}개</div>
            )}
          </div>
        ) : (
          <div className="py-4 text-center text-xs text-gray-400">변환 규칙 없음</div>
        )}
      </div>

      {/* 핸들 */}
      <Handle type="target" position={Position.Left} className="!h-3 !w-3 !bg-indigo-500" />
      <Handle type="source" position={Position.Right} className="!h-3 !w-3 !bg-indigo-500" />
    </div>
  );
});

DataTransformNode.displayName = "DataTransformNode";