@extends('layouts.app')
@section('title', '客戶管理')

@section('content')
  <div class="container py-4">

    @if (session('success'))
      <div class="alert alert-success alert-dismissible fade show" role="alert">
        {{ session('success') }}
        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="關閉"></button>
      </div>
    @endif

    <h1 class="mb-4">客戶管理</h1>

    <div class="d-flex gap-2 mb-3 flex-wrap">
      <a href="{{ route('clients.create') }}" class="btn btn-success">➕ 新增客戶</a>
      <a href="{{ route('clients.import.form') }}" class="btn btn-info">⬆️ 匯入 CSV</a>
    </div>

    {{-- 批次操作列 --}}
    <div id="batchBar" style="display:none;position:sticky;top:66px;z-index:100;background:#1e40af;color:#fff;padding:8px 16px;border-radius:8px;margin-bottom:10px;align-items:center;gap:12px;">
      <span class="fw-semibold me-2">已選 <span id="batchCnt">0</span> 筆</span>
      <form id="batchForm" method="POST" action="{{ route('clients.destroyBatch') }}" style="display:inline;">
        @csrf @method('DELETE')
        <div id="batchIds"></div>
        <button type="button" id="batchDelBtn" class="btn btn-sm btn-danger me-2">
          <i class="bi bi-trash me-1"></i>批次刪除
        </button>
      </form>
      <button type="button" id="batchCancelBtn" class="btn btn-sm btn-outline-light">取消選取</button>
    </div>

    <div class="card shadow-sm">
      <div class="card-body table-responsive">
        <table id="clientsTable" class="table table-striped table-bordered align-middle">
          <thead class="table-light">
            <tr>
              <th style="width:36px;" class="text-center">
                <input type="checkbox" id="chkAll" class="form-check-input" title="全選">
              </th>
              <th class="text-center text-muted" style="width:48px;font-size:.75rem;">#</th>
              <th>客戶名稱</th>
              <th>聯絡人</th>
              <th>信箱</th>
              <th>電話</th>
              <th>最後更新日期</th>
              <th>操作</th>
            </tr>
          </thead>
          <tbody>
            @foreach ($clients as $c)
              <tr>
                <td class="text-center">
                  <input type="checkbox" class="form-check-input row-cb" value="{{ $c->id }}" data-name="ids[]">
                </td>
                <td class="text-center text-muted" style="font-size:.75rem;">{{ $loop->iteration }}</td>
                <td>{{ $c->name }}</td>
                <td>{{ $c->contact_person }}</td>
                <td>{{ $c->email }}</td>
                <td>{{ $c->phone }}</td>
                <td>{{ $c->updated_at ? $c->updated_at->format('Y-m-d H:i') : '-' }}</td>
                <td>
                  <a href="{{ route('clients.edit', $c) }}" class="btn btn-sm btn-outline-primary">編輯</a>
                  <form action="{{ route('clients.destroy', $c) }}" method="post" class="d-inline"
                    onsubmit="return confirm('確定刪除？')">
                    @csrf @method('DELETE')
                    <button class="btn btn-sm btn-outline-danger ms-1">刪除</button>
                  </form>
                </td>
              </tr>
            @endforeach
          </tbody>
        </table>
      </div>
    </div>
  </div>
@endsection

@push('scripts')
  <script>
  $(function() {
    $('#clientsTable').DataTable({
      serverSide: false,
      processing: false,
      dom: 'lfrtip',
      order: [[6, 'desc']],
      pageLength: 10,
      language: { url: '/vendor/datatables/i18n/zh-HANT.json' },
      columnDefs: [
        { orderable: false, searchable: false, targets: [0, 1, 7] },
        { render: (_, __, ___, meta) => meta.row + 1, targets: 1 },
      ],
    });
  });

  // ── 批次刪除邏輯 ──
  const batchBar    = document.getElementById('batchBar');
  const batchCnt    = document.getElementById('batchCnt');
  const batchIds    = document.getElementById('batchIds');
  const chkAll      = document.getElementById('chkAll');

  function updateBatchBar() {
    const checked = document.querySelectorAll('.row-cb:checked');
    batchCnt.textContent = checked.length;
    batchBar.style.display = checked.length > 0 ? 'flex' : 'none';
    const all = document.querySelectorAll('.row-cb');
    chkAll.indeterminate = checked.length > 0 && checked.length < all.length;
    chkAll.checked = all.length > 0 && checked.length === all.length;
  }

  document.addEventListener('change', e => {
    if (e.target.id === 'chkAll') {
      document.querySelectorAll('.row-cb').forEach(cb => cb.checked = e.target.checked);
    }
    if (e.target.classList.contains('row-cb') || e.target.id === 'chkAll') updateBatchBar();
  });

  document.getElementById('batchDelBtn').addEventListener('click', () => {
    const checked = document.querySelectorAll('.row-cb:checked');
    if (!checked.length) return;
    if (!confirm(`確定刪除選取的 ${checked.length} 筆客戶？此操作無法還原。`)) return;
    batchIds.innerHTML = '';
    checked.forEach(cb => {
      const inp = document.createElement('input');
      inp.type = 'hidden'; inp.name = 'ids[]'; inp.value = cb.value;
      batchIds.appendChild(inp);
    });
    document.getElementById('batchForm').submit();
  });

  document.getElementById('batchCancelBtn').addEventListener('click', () => {
    document.querySelectorAll('.row-cb').forEach(cb => cb.checked = false);
    if (chkAll) chkAll.checked = false;
    updateBatchBar();
  });
  </script>
@endpush