@extends('layouts.app')
@section('title', 'VPN 帳號管理')

@section('content')
  <div class="container my-4">
    <h1 class="mb-4">VPN 帳號管理</h1>

    <div class="card custom-card mb-4">
      <div class="card-header">本地資料庫 VPN 帳號</div>
      <div class="card-body">
        <div class="d-flex justify-content-between align-items-center mb-3">
          <h5 class="card-title mb-0">管理資料</h5>
          <a href="{{ route('vpn-accounts.create') }}" class="btn btn-primary">新增帳號</a>
        </div>

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

        @if ($accounts->isEmpty())
          <p class="text-center">目前尚未建立任何帳號。</p>
        @else
          {{-- 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('vpn-accounts.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="table-responsive">
            <table id="dt" class="table table-striped table-bordered nowrap" style="width:100%">
              <thead>
                <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>帳號</th>
                  <th>建立時間</th>
                  <th>帳號期限</th>
                  <th>狀態</th>
                  <th>操作</th>
                </tr>
              </thead>
              <tbody>
                @foreach ($accounts as $account)
                  @php
                    $expireDate   = $account->expire_date ? \Carbon\Carbon::parse($account->expire_date) : null;
                    $isExpired    = $expireDate && $expireDate->isPast();
                    $daysLeft     = $expireDate ? (int) now()->diffInDays($expireDate, false) : null;
                    $autoDisabled = $account->status === 'disabled' && $isExpired;
                  @endphp
                  <tr class="{{ $autoDisabled ? 'table-secondary' : '' }}">
                    <td class="text-center">
                      <input type="checkbox" class="form-check-input row-cb" value="{{ $account->id }}" data-name="ids[]">
                    </td>
                    <td class="text-center text-muted" style="font-size:.75rem;">{{ $loop->iteration }}</td>
                    <td>{{ $account->username }}</td>
                    <td>{{ $account->created_at->format('Y-m-d H:i:s') }}</td>
                    <td>
                      @if (!$expireDate)
                        <span class="text-muted">—</span>
                      @elseif ($isExpired)
                        <span class="badge bg-danger">{{ $expireDate->toDateString() }} 已到期</span>
                      @elseif ($daysLeft <= 2)
                        <span class="badge bg-warning text-dark">{{ $expireDate->toDateString() }}（剩 {{ $daysLeft }} 天）</span>
                      @else
                        <span class="badge bg-success">{{ $expireDate->toDateString() }}（剩 {{ $daysLeft }} 天）</span>
                      @endif
                    </td>
                    <td>
                      @if ($autoDisabled)
                        <span class="badge bg-secondary">已到期停用</span>
                      @elseif ($account->status === 'disabled')
                        <span class="badge bg-dark">已停用</span>
                      @else
                        <span class="badge bg-success">啟用中</span>
                      @endif
                    </td>
                    <td>
                      <a href="{{ route('vpn-accounts.edit', $account) }}" class="btn btn-sm btn-info">編輯</a>
                      @if ($account->status === 'active')
                        <form action="{{ route('vpn-accounts.disable', $account) }}" method="POST" class="d-inline">
                          @csrf @method('PATCH')
                          <button type="submit" class="btn btn-sm btn-warning" onclick="return confirm('確定停用嗎?')">停用</button>
                        </form>
                      @else
                        <form action="{{ route('vpn-accounts.enable', $account) }}" method="POST" class="d-inline">
                          @csrf @method('PATCH')
                          <button type="submit" class="btn btn-sm btn-success" onclick="return confirm('確定啟用嗎?')">啟用</button>
                        </form>
                      @endif
                      <form action="{{ route('vpn-accounts.destroy', $account) }}" method="POST" class="d-inline">
                        @csrf @method('DELETE')
                        <button type="submit" class="btn btn-sm btn-danger" onclick="return confirm('確定刪除嗎?')">刪除</button>
                      </form>
                    </td>
                  </tr>
                @endforeach
              </tbody>
            </table>
          </div>
        @endif
      </div>
    </div>
  </div>
@endsection

@push('scripts')
<script>
document.addEventListener('DOMContentLoaded', () => {
  const table = document.querySelector('#dt');
  if (table) {
    new DataTable(table, {
      language: { url: '/vendor/datatables/i18n/zh-HANT.json' },
      ordering: true,
      pageLength: 10,
      lengthMenu: [[10, 20, 50, 100], [10, 20, 50, 100]],
      columnDefs: [
        { orderable: false, searchable: false, targets: [0, 1, 6] },
        { 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');
  if (!batchBar) return;

  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 VPN 帳號？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