// frontend/components/tasks/ScaffoldPanel.tsx — Auto-Scaffolding (업무 쪼개기)
"use client";
import { useState } from "react";
import { Icon } from "@/components/Icon";
import { tasksApi } from "@/lib/tasks/api";
import type { ScaffoldResult } from "@/lib/types";

export function ScaffoldPanel({
  taskId,
  show,
  onApplied,
}: {
  taskId: string;
  show: boolean; // 완료 작업이면 트리거 숨김
  onApplied: () => void;
}) {
  const [preview, setPreview] = useState<ScaffoldResult | null>(null);
  const [busy, setBusy] = useState(false);

  const trigger = async () => {
    setBusy(true);
    try {
      const r = await tasksApi.scaffold(taskId, { create: false });
      setPreview(r);
    } finally {
      setBusy(false);
    }
  };

  const apply = async () => {
    setBusy(true);
    try {
      await tasksApi.scaffold(taskId, { create: true });
      setPreview(null);
      onApplied();
    } finally {
      setBusy(false);
    }
  };

  if (preview) {
    return (
      <div className="scaffold-panel">
        <div className="sp-head">
          <span className="sp-ic">
            <Icon name="spark" />
          </span>
          <div className="sp-h">
            <b>{preview.kind} 워크플로우 추천</b>
            <span>{preview.items.length}단계 · 예상 시간 자동 배분</span>
          </div>
          <button className="sp-x" onClick={() => setPreview(null)} aria-label="닫기">
            <Icon name="x" />
          </button>
        </div>
        <div className="sp-items">
          {preview.items.map((it, i) => (
            <div className="sp-item" key={i}>
              <span className="sp-num">{i + 1}</span>
              <span className="sp-title">{it.title}</span>
              <span className="sp-est">
                <Icon name="clock" />
                {it.est}
              </span>
            </div>
          ))}
        </div>
        <div className="sp-foot">
          <button className="sp-ghost" onClick={() => setPreview(null)}>
            닫기
          </button>
          <button className="sp-apply" onClick={apply} disabled={busy}>
            <Icon name="plus" />
            {preview.items.length}개 하위 작업 모두 추가
          </button>
        </div>
      </div>
    );
  }

  if (!show) return null;
  return (
    <button className="scaffold-trigger" onClick={trigger} disabled={busy}>
      <span className="st-ic">
        <Icon name="wand" />
      </span>
      <span className="st-tx">
        <b>아리에게 업무 쪼개기 맡기기</b>
        <span>이 작업을 단계별 하위 작업으로 자동 분해하고 예상 시간을 배분해요</span>
      </span>
      <Icon name="arrow" />
    </button>
  );
}