// =============================================================
// CorrectionField.jsx — 是正指示関連画面（現場担当者）
//   CorrectionListField / CorrectionDetailField / CorrectionReportInput
// =============================================================

const { useState: useStateCF, useMemo: useMemoC, useRef: useRefC } = React;
const {
  ArrowLeft: ArrowLeftCF,
  CheckCircle: CheckCircleCF,
  Camera: CameraCF,
  X: XCF,
  ChevronRight: ChevRightCF,
} = window.LucideReact;

// ─── ステータス定義 ──────────────────────────────────────────

const CF_STATUS = {
  pending:   { label: '未対応',   badge: 'bg-red-100 text-red-700',     dot: 'bg-red-500'    },
  in_review: { label: '承認待ち', badge: 'bg-amber-100 text-amber-700', dot: 'bg-amber-400'  },
  resolved:  { label: '承認済',   badge: 'bg-green-100 text-green-700', dot: 'bg-green-500'  },
  rejected:  { label: '差戻し',   badge: 'bg-orange-100 text-orange-700', dot: 'bg-orange-500' },
};

const fmtCFDate = (d) => {
  if (!d) return '';
  const dt = new Date(d + 'T00:00:00');
  return `${dt.getFullYear()}年${dt.getMonth() + 1}月${dt.getDate()}日`;
};
const fmtCFDatetime = (iso) => {
  if (!iso) return '';
  return iso.replace('T', ' ').slice(0, 16);
};
const isOverdueCF = (deadline) => new Date(deadline + 'T23:59:59') < new Date();

// ─── 写真行（是正用） ────────────────────────────────────────

const CorrectionPhotoRow = ({ photos, onChange }) => {
  const fileRef = useRefC(null);
  const add = (e) => {
    const files = Array.from(e.target.files);
    const added = files.slice(0, 5 - photos.length).map(f => ({
      id: Date.now() + Math.random(),
      name: f.name,
      preview: URL.createObjectURL(f),
    }));
    onChange([...photos, ...added]);
    e.target.value = '';
  };
  return (
    <div className="flex flex-wrap gap-2">
      {photos.map(p => (
        <div key={p.id} className="relative w-14 h-14 rounded-lg overflow-hidden border border-slate-200 flex-shrink-0">
          <img src={p.preview} alt={p.name} className="w-full h-full object-cover" />
          <button
            onClick={() => onChange(photos.filter(x => x.id !== p.id))}
            className="absolute top-0.5 right-0.5 w-4 h-4 bg-black/60 rounded-full flex items-center justify-center"
          >
            <XCF size={9} className="text-white" />
          </button>
        </div>
      ))}
      {photos.length < 5 && (
        <button
          onClick={() => fileRef.current?.click()}
          className="w-14 h-14 rounded-lg border-2 border-dashed border-slate-300 flex flex-col items-center justify-center gap-0.5 text-slate-400 hover:border-indigo-300 hover:text-indigo-400 transition-colors"
        >
          <CameraCF size={15} />
          <span className="text-[9px]">追加</span>
        </button>
      )}
      <input ref={fileRef} type="file" accept="image/*" multiple className="hidden" onChange={add} />
    </div>
  );
};

// =============================================================
// 1. 是正指示一覧画面（現場担当者）
// =============================================================

const CorrectionListField = ({ appData, navigate }) => {

  const orders = useMemoC(() => {
    const priorityOf = (s) => ({ pending: 0, rejected: 1, in_review: 2, resolved: 3 }[s] ?? 4);
    return [...(appData.correctionOrders || [])]
      .filter(o => o.center_id === 1)
      .sort((a, b) => {
        const pd = priorityOf(a.status) - priorityOf(b.status);
        return pd !== 0 ? pd : a.deadline.localeCompare(b.deadline);
      });
  }, [appData.correctionOrders]);

  const getLatest = (orderId) =>
    [...(appData.correctionReports || [])]
      .filter(r => r.correction_order_id === orderId)
      .sort((a, b) => b.created_at.localeCompare(a.created_at))[0] || null;

  const needsAction = orders.filter(o => o.status === 'pending' || o.status === 'rejected').length;

  return (
    <div className="min-h-full">

      {/* ページヘッダー */}
      <div className="sticky top-0 z-10 bg-white border-b border-slate-200 px-4 py-3">
        <div className="flex items-center justify-between">
          <div>
            <p className="font-bold text-slate-800 text-sm">是正指示一覧</p>
            <p className="text-xs text-slate-500 mt-0.5">東京物流センター</p>
          </div>
          {needsAction > 0 && (
            <span className="text-xs font-bold px-2.5 py-1 bg-red-100 text-red-700 rounded-full">
              要対応 {needsAction}件
            </span>
          )}
        </div>
      </div>

      <div className="p-4 space-y-3 pb-6">
        {orders.length === 0 ? (
          <div className="flex flex-col items-center justify-center py-16 text-slate-400">
            <CheckCircleCF size={40} strokeWidth={1.2} className="mb-3" />
            <p className="text-sm">是正指示はありません</p>
          </div>
        ) : (
          orders.map(order => {
            const cfg    = CF_STATUS[order.status] || CF_STATUS.pending;
            const latest = getLatest(order.id);
            const over   = isOverdueCF(order.deadline) && order.status !== 'resolved';

            return (
              <button
                key={order.id}
                onClick={() => navigate('CORRECTION_DETAIL_FIELD', { orderId: order.id })}
                className="w-full bg-white rounded-2xl border border-slate-200 p-4 text-left hover:border-indigo-200 active:bg-slate-50 transition-colors"
              >
                {/* ステータス + 期限 */}
                <div className="flex items-center justify-between gap-2 mb-2.5">
                  <span className={`text-[11px] font-bold px-2 py-0.5 rounded-full ${cfg.badge}`}>
                    {cfg.label}
                  </span>
                  <span className={`text-[11px] font-semibold flex-shrink-0 ${over ? 'text-red-600' : 'text-slate-400'}`}>
                    期限 {fmtCFDate(order.deadline)}{over ? '　⚠ 超過' : ''}
                  </span>
                </div>

                {/* 指示内容プレビュー */}
                <p className="text-sm text-slate-700 leading-relaxed line-clamp-2 mb-2">
                  {order.content}
                </p>

                {/* 最新報告サマリ */}
                <div className="flex items-center justify-between">
                  {latest ? (
                    <span className="text-xs text-slate-400">
                      最新報告:&nbsp;
                      <span className={`font-semibold ${
                        latest.review_status === '差戻し' ? 'text-orange-600' :
                        latest.review_status === '承認済'  ? 'text-green-600'  : 'text-amber-600'
                      }`}>{latest.review_status}</span>
                    </span>
                  ) : (
                    <span className="text-xs text-slate-400">報告なし</span>
                  )}
                  <ChevRightCF size={14} className="text-slate-300 flex-shrink-0" />
                </div>
              </button>
            );
          })
        )}
      </div>
    </div>
  );
};

// =============================================================
// 2. 是正指示内容詳細画面
// =============================================================

const CorrectionDetailField = ({ appData, navigate, screenParams }) => {
  const { orderId } = screenParams || {};
  const order = (appData.correctionOrders || []).find(o => o.id === orderId);

  const [activeTab, setActiveTab] = useStateCF(0);

  if (!order) {
    return (
      <div className="flex flex-col items-center justify-center py-20 gap-4 text-slate-400">
        <p className="text-sm">指示が見つかりません</p>
        <button onClick={() => navigate('CORRECTION_LIST_FIELD')} className="text-indigo-600 text-sm font-semibold">
          ← 一覧に戻る
        </button>
      </div>
    );
  }

  // 報告を新しい順に並べ直す
  const reports = [...(appData.correctionReports || [])]
    .filter(r => r.correction_order_id === order.id)
    .sort((a, b) => b.created_at.localeCompare(a.created_at));

  const cfg      = CF_STATUS[order.status] || CF_STATUS.pending;
  const over     = isOverdueCF(order.deadline) && order.status !== 'resolved';
  const latest   = reports[0];
  const canReport = order.status !== 'resolved';
  const isRejected = order.status === 'rejected' || latest?.review_status === '差戻し';
  const creator  = window.MASTER_USERS.find(u => u.id === order.created_by);

  const reportBtnLabel = isRejected
    ? '差戻し対応報告を入力する'
    : reports.length > 0 ? '追加報告する' : '是正報告を入力する';

  return (
    <div className="min-h-full">

      {/* サブヘッダー */}
      <div className="sticky top-0 bg-white border-b border-slate-200 z-10 px-4 py-3 flex items-center gap-3">
        <button
          onClick={() => navigate('CORRECTION_LIST_FIELD')}
          className="w-8 h-8 rounded-full hover:bg-slate-100 flex items-center justify-center flex-shrink-0 transition-colors"
        >
          <ArrowLeftCF size={18} className="text-slate-600" />
        </button>
        <p className="font-bold text-slate-800 text-sm flex-1">是正指示詳細</p>
        <span className={`text-[11px] font-bold px-2.5 py-1 rounded-full ${cfg.badge}`}>
          {cfg.label}
        </span>
      </div>

      <div className="p-4 space-y-4 pb-28">

        {/* ─ 是正指示カード ─ */}
        <div className="bg-white rounded-2xl border border-slate-200 overflow-hidden">
          <div className="px-4 py-2.5 bg-indigo-50 border-b border-indigo-100">
            <span className="text-xs font-bold text-indigo-700">是正指示内容</span>
          </div>
          <div className="p-4 space-y-3">
            <p className="text-sm text-slate-700 leading-relaxed">{order.content}</p>
            <div className="flex flex-wrap gap-x-5 gap-y-1 text-xs text-slate-500 pt-2 border-t border-slate-100">
              <span>期限:&nbsp;
                <span className={`font-semibold ${over ? 'text-red-600' : 'text-slate-700'}`}>
                  {fmtCFDate(order.deadline)}{over ? '（超過）' : ''}
                </span>
              </span>
              <span>発行:&nbsp;<span className="font-semibold text-slate-700">{creator?.name}</span></span>
              <span>作成:&nbsp;<span className="font-semibold text-slate-700">{fmtCFDatetime(order.created_at)}</span></span>
            </div>
          </div>
        </div>

        {/* ─ 対応報告履歴 ─ */}
        {reports.length > 0 && (
          <div className="bg-white rounded-2xl border border-slate-200 overflow-hidden">
            <div className="px-4 py-2.5 bg-slate-50 border-b border-slate-100 flex items-center justify-between">
              <span className="text-xs font-bold text-slate-600">対応報告履歴</span>
              <span className="text-xs text-slate-400">{reports.length}件</span>
            </div>

            {/* タブ（複数報告時） */}
            {reports.length > 1 && (
              <div className="flex border-b border-slate-100 overflow-x-auto" style={{ WebkitOverflowScrolling: 'touch' }}>
                {reports.map((r, i) => (
                  <button
                    key={r.id}
                    onClick={() => setActiveTab(i)}
                    className={`flex-shrink-0 px-4 py-2.5 text-xs font-semibold border-b-2 transition-colors ${
                      activeTab === i
                        ? 'border-indigo-600 text-indigo-600'
                        : 'border-transparent text-slate-400 hover:text-slate-600'
                    }`}
                  >
                    {i === 0 ? `報告 ${reports.length}（最新）` : `報告 ${reports.length - i}`}
                  </button>
                ))}
              </div>
            )}

            {/* 報告本文 */}
            {(() => {
              const r = reports[activeTab] || reports[0];
              if (!r) return null;
              const reporter = window.MASTER_USERS.find(u => u.id === r.reported_by);
              return (
                <div className="p-4 space-y-3">
                  <p className="text-sm text-slate-700 leading-relaxed">{r.content}</p>

                  {/* 差戻し理由 */}
                  {r.review_status === '差戻し' && r.return_reason && (
                    <div className="p-3 bg-orange-50 rounded-xl border border-orange-100">
                      <p className="text-[11px] font-bold text-orange-700 mb-1">差戻し理由</p>
                      <p className="text-xs text-orange-800 leading-relaxed">{r.return_reason}</p>
                    </div>
                  )}

                  <div className="flex items-center justify-between text-xs text-slate-400 pt-2 border-t border-slate-100">
                    <span>{reporter?.name}　{fmtCFDatetime(r.created_at)}</span>
                    <span className={`font-bold ${
                      r.review_status === '差戻し' ? 'text-orange-600' :
                      r.review_status === '承認済'  ? 'text-green-600'  : 'text-amber-600'
                    }`}>{r.review_status}</span>
                  </div>
                </div>
              );
            })()}
          </div>
        )}

        {/* 未報告メッセージ */}
        {reports.length === 0 && (
          <div className="bg-slate-50 rounded-2xl border border-slate-200 p-5 text-center">
            <p className="text-sm text-slate-500">まだ是正報告がありません</p>
            <p className="text-xs text-slate-400 mt-1">下のボタンから報告を入力してください</p>
          </div>
        )}
      </div>

      {/* 報告ボタン（固定） */}
      {canReport && (
        <div className="fixed bottom-16 md:bottom-0 inset-x-0 md:left-52 px-4 pb-3 pt-6 bg-gradient-to-t from-slate-50 via-slate-50/90 to-transparent pointer-events-none">
          <button
            onClick={() => navigate('CORRECTION_REPORT_INPUT', {
              orderId: order.id,
              prefillContent: isRejected && latest ? latest.content : '',
            })}
            className={`w-full py-3.5 font-bold rounded-2xl text-sm shadow-lg transition-colors pointer-events-auto text-white ${
              isRejected ? 'bg-orange-600 hover:bg-orange-700' : 'bg-indigo-600 hover:bg-indigo-700'
            }`}
          >
            {reportBtnLabel}
          </button>
        </div>
      )}
    </div>
  );
};

// =============================================================
// 3. 是正対応報告入力画面
// =============================================================

const CorrectionReportInput = ({ appData, navigate, refreshData, screenParams }) => {
  const { orderId, prefillContent = '' } = screenParams || {};
  const order = (appData.correctionOrders || []).find(o => o.id === orderId);

  const [content,     setContent]     = useStateCF(prefillContent);
  const [photos,      setPhotos]      = useStateCF([]);
  const [showConfirm, setShowConfirm] = useStateCF(false);
  const [showToast,   setShowToast]   = useStateCF(false);
  const [saving,      setSaving]      = useStateCF(false);

  const canConfirm = content.trim().length > 0;

  const handleSave = () => {
    setSaving(true);
    const data = window.StorageUtils.get();
    const newId = Math.max(0, ...(data.correctionReports || []).map(r => r.id)) + 1;
    const now   = new Date().toISOString().slice(0, 19);

    const newReport = {
      id:                  newId,
      correction_order_id: orderId,
      reported_by:         1,
      content:             content.trim(),
      review_status:       '承認待ち',
      return_reason:       null,
      reviewed_by:         null,
      reviewed_at:         null,
      created_at:          now,
    };

    window.StorageUtils.update(d => ({
      ...d,
      correctionReports: [...(d.correctionReports || []), newReport],
      correctionOrders:  (d.correctionOrders || []).map(o =>
        o.id === orderId ? { ...o, status: 'in_review', updated_at: now } : o
      ),
    }));

    refreshData();
    setShowConfirm(false);
    setSaving(false);
    setShowToast(true);
    setTimeout(() => {
      setShowToast(false);
      navigate('CORRECTION_DETAIL_FIELD', { orderId });
    }, 1600);
  };

  if (!order) {
    return (
      <div className="flex flex-col items-center justify-center py-20 gap-4 text-slate-400">
        <p className="text-sm">是正指示が見つかりません</p>
        <button onClick={() => navigate('CORRECTION_LIST_FIELD')} className="text-indigo-600 text-sm font-semibold">
          ← 一覧に戻る
        </button>
      </div>
    );
  }

  const isRejected = order.status === 'rejected' || prefillContent.length > 0;

  return (
    <div className="min-h-full">

      {/* サブヘッダー */}
      <div className="sticky top-0 bg-white border-b border-slate-200 z-10 px-4 py-3 flex items-center gap-3">
        <button
          onClick={() => navigate('CORRECTION_DETAIL_FIELD', { orderId })}
          className="w-8 h-8 rounded-full hover:bg-slate-100 flex items-center justify-center flex-shrink-0 transition-colors"
        >
          <ArrowLeftCF size={18} className="text-slate-600" />
        </button>
        <p className="font-bold text-slate-800 text-sm flex-1">
          {isRejected ? '差戻し対応報告' : '是正対応報告'}
        </p>
      </div>

      <div className="p-4 space-y-4 pb-28">

        {/* 是正指示プレビュー */}
        <div className={`rounded-2xl p-4 border ${isRejected ? 'bg-orange-50 border-orange-100' : 'bg-indigo-50 border-indigo-100'}`}>
          <p className={`text-[11px] font-bold mb-1.5 ${isRejected ? 'text-orange-600' : 'text-indigo-600'}`}>
            {isRejected ? '⚠ 差戻し対応 — 是正指示内容' : '是正指示内容'}
          </p>
          <p className="text-xs text-slate-600 leading-relaxed line-clamp-3">{order.content}</p>
          <p className="text-[10px] text-slate-400 mt-1.5">期限: {fmtCFDate(order.deadline)}</p>
        </div>

        {/* 対応内容入力 */}
        <div>
          <div className="flex items-center justify-between mb-1.5">
            <label className="text-xs font-bold text-slate-600">対応内容（必須）</label>
            <span className={`text-[10px] font-medium ${content.length > 900 ? 'text-red-500' : 'text-slate-400'}`}>
              {content.length}/1000
            </span>
          </div>
          <textarea
            value={content}
            onChange={e => setContent(e.target.value)}
            maxLength={1000}
            rows={7}
            placeholder="実施した是正対応の内容を詳しく記入してください..."
            className="w-full text-sm border border-slate-300 rounded-xl p-3 resize-none outline-none focus:ring-2 focus:ring-indigo-300 focus:border-indigo-400 leading-relaxed"
          />
        </div>

        {/* 写真添付 */}
        <div>
          <p className="text-xs font-bold text-slate-600 mb-2">写真添付（最大5枚）</p>
          <CorrectionPhotoRow photos={photos} onChange={setPhotos} />
        </div>
      </div>

      {/* 確認ボタン（固定） */}
      <div className="fixed bottom-16 md:bottom-0 inset-x-0 md:left-52 px-4 pb-3 pt-6 bg-gradient-to-t from-slate-50 via-slate-50/90 to-transparent pointer-events-none">
        <button
          onClick={() => setShowConfirm(true)}
          disabled={!canConfirm}
          className="w-full py-3.5 bg-indigo-600 disabled:bg-slate-200 disabled:text-slate-400 text-white font-bold rounded-2xl text-sm shadow-lg transition-colors pointer-events-auto"
        >
          {canConfirm ? '入力内容を確認する' : '対応内容を入力してください'}
        </button>
      </div>

      {/* 確認ダイアログ */}
      {showConfirm && (
        <div className="fixed inset-0 z-[100] flex items-end sm:items-center justify-center p-4">
          <div className="absolute inset-0 bg-black/50 backdrop-blur-sm" onClick={() => setShowConfirm(false)} />
          <div className="relative bg-white rounded-3xl shadow-2xl w-full max-w-sm p-6">
            <h3 className="font-bold text-slate-800 text-base mb-1">報告内容の確認</h3>
            <p className="text-xs text-slate-400 mb-4">以下の内容で送信します</p>
            <div className="bg-slate-50 rounded-2xl p-4 mb-5 max-h-40 overflow-y-auto">
              <p className="text-sm text-slate-700 leading-relaxed">{content}</p>
              {photos.length > 0 && (
                <p className="text-xs text-slate-500 mt-2 pt-2 border-t border-slate-200">
                  写真 {photos.length}枚
                </p>
              )}
            </div>
            <div className="flex gap-2.5">
              <button
                onClick={() => setShowConfirm(false)}
                className="flex-1 py-3 border border-slate-200 rounded-2xl text-sm font-semibold text-slate-600 hover:bg-slate-50 transition-colors"
              >修正する</button>
              <button
                onClick={handleSave}
                disabled={saving}
                className="flex-1 py-3 bg-indigo-600 hover:bg-indigo-700 text-white rounded-2xl text-sm font-bold transition-colors disabled:opacity-50"
              >{saving ? '送信中...' : '報告を送信する'}</button>
            </div>
          </div>
        </div>
      )}

      {/* Toast */}
      {showToast && (
        <div className="fixed bottom-20 md:bottom-4 inset-x-0 md:left-52 flex justify-center z-[300] px-4 pointer-events-none">
          <div className="bg-green-600 text-white px-5 py-2.5 rounded-2xl shadow-xl flex items-center gap-2 text-sm font-semibold">
            <CheckCircleCF size={16} />
            報告を送信しました
          </div>
        </div>
      )}
    </div>
  );
};

Object.assign(window, { CorrectionListField, CorrectionDetailField, CorrectionReportInput });