"use client";

import { memo } from "react";
import { Handle, Position, NodeProps } from "reactflow";
import { GitBranch } from "lucide-react";
import { CompactNodeShell } from "./CompactNodeShell";
import type { ConditionNodeData } from "@/types/node-editor";

const OPERATOR_LABELS: Record<string, string> = {
  EQUALS: "=", NOT_EQUALS: "!=",
  GREATER_THAN: ">", LESS_THAN: "<",
  GREATER_THAN_OR_EQUAL: ">=", LESS_THAN_OR_EQUAL: "<=",
  LIKE: "포함", NOT_LIKE: "미포함",
  IN: "IN", NOT_IN: "NOT IN",
  IS_NULL: "NULL", IS_NOT_NULL: "NOT NULL",
  EXISTS_IN: "EXISTS", NOT_EXISTS_IN: "NOT EXISTS",
};

export const ConditionNode = memo(({ data, selected }: NodeProps<ConditionNodeData>) => {
  const condCount = data.conditions?.length || 0;
  const summary = condCount > 0
    ? `${condCount}개 조건 (${data.logic || "AND"})`
    : "조건을 설정해 주세요";

  return (
    <div
      className={`rounded-lg border bg-zinc-900 shadow-lg transition-all ${
        selected ? "border-violet-500 shadow-violet-500/20" : "border-zinc-700"
      }`}
      style={{ minWidth: "260px", maxWidth: "320px" }}
    >
      <Handle
        type="target"
        position={Position.Left}
        className="!h-2.5 !w-2.5 !border-2 !border-amber-500 !bg-zinc-900"
      />

      {/* 헤더 */}
      <div className="flex items-center gap-2.5 px-3 py-2.5">
        <div className="flex h-7 w-7 flex-shrink-0 items-center justify-center rounded-md bg-amber-500/20">
          <GitBranch className="h-3.5 w-3.5 text-amber-400" />
        </div>
        <div className="min-w-0 flex-1">
          <div className="text-xs font-semibold text-zinc-200">
            {data.displayName || "조건 분기"}
          </div>
          <div className="line-clamp-2 text-[10px] leading-relaxed text-zinc-500">{summary}</div>
        </div>
      </div>

      {/* 조건 미리보기 */}
      {condCount > 0 && (
        <div className="space-y-0.5 border-t border-zinc-800 px-3 py-2 text-[10px] text-zinc-400">
          {data.conditions!.slice(0, 2).map((c, i) => (
            <div key={i} className="flex items-center gap-1 flex-wrap">
              {i > 0 && <span className="text-amber-500">{data.logic}</span>}
              <span className="font-mono text-zinc-300">{c.field}</span>
              <span className="text-amber-400">{OPERATOR_LABELS[c.operator] || c.operator}</span>
              {c.value !== undefined && c.value !== null && (
                <span className="text-zinc-500">{String(c.value)}</span>
              )}
            </div>
          ))}
          {condCount > 2 && <span className="text-zinc-600">외 {condCount - 2}개</span>}
        </div>
      )}

      {/* 분기 출력 */}
      <div className="border-t border-zinc-800">
        <div className="relative flex items-center justify-end px-3 py-1.5">
          <span className="text-[10px] font-medium text-emerald-400">통과</span>
          <Handle
            type="source"
            position={Position.Right}
            id="true"
            className="!h-2.5 !w-2.5 !border-2 !border-emerald-500 !bg-zinc-900"
          />
        </div>
        <div className="relative flex items-center justify-end border-t border-zinc-800/50 px-3 py-1.5">
          <span className="text-[10px] font-medium text-pink-400">미통과</span>
          <Handle
            type="source"
            position={Position.Right}
            id="false"
            className="!h-2.5 !w-2.5 !border-2 !border-pink-500 !bg-zinc-900"
          />
        </div>
      </div>
    </div>
  );
});

ConditionNode.displayName = "ConditionNode";