@extends('layouts.app')
@section('title', 'Log 分析 — ' . $logCollection->displayName())

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

  {{-- 麵包屑 --}}
  <nav aria-label="breadcrumb" class="mb-3">
    <ol class="breadcrumb small">
      <li class="breadcrumb-item"><a href="{{ route('log-analysis.index') }}">Log 分析</a></li>
      <li class="breadcrumb-item active">{{ $logCollection->displayName() }}</li>
    </ol>
  </nav>

  {{-- 頁首資訊列 --}}
  <div class="card border-0 shadow-sm mb-3">
    <div class="card-body py-2">
      <div class="row g-2 align-items-center">
        <div class="col-md-5">
          <h5 class="mb-0">
            <span class="badge bg-{{ $logCollection->typeColor() }} me-2">{{ $logCollection->typeLabel() }}</span>
            {{ $logCollection->displayName() }}
          </h5>
          <div class="text-muted small mt-1">
            主機：<strong>{{ $logCollection->host?->name ?? $logCollection->hostname ?? $logCollection->source_ip ?? '未知' }}</strong>
            &nbsp;·&nbsp; 來源：{{ $logCollection->receive_method === 'rsyslog' ? 'rsyslog' : ($logCollection->receive_method === 'http_upload' ? 'API 上傳' : '手動上傳') }}
            &nbsp;·&nbsp; {{ number_format($logCollection->file_size / 1024, 1) }} KB
            &nbsp;·&nbsp; {{ number_format($logCollection->line_count) }} 行
            &nbsp;·&nbsp; {{ $logCollection->created_at->format('Y-m-d H:i') }}
          </div>
        </div>
        <div class="col-md-4">
          <div class="d-flex gap-3">
            <div class="text-center">
              <div class="fs-5 fw-bold text-danger">{{ number_format($logCollection->error_count) }}</div>
              <div class="text-muted" style="font-size:0.75rem">Error</div>
            </div>
            <div class="text-center">
              <div class="fs-5 fw-bold text-warning">{{ number_format($logCollection->warning_count) }}</div>
              <div class="text-muted" style="font-size:0.75rem">Warning</div>
            </div>
            <div class="text-center">
              <div class="fs-5 fw-bold text-secondary">{{ number_format(($logCollection->line_count ?? 0) - $logCollection->error_count - $logCollection->warning_count) }}</div>
              <div class="text-muted" style="font-size:0.75rem">其他</div>
            </div>
          </div>
        </div>
        <div class="col-md-3 text-end d-flex gap-2 justify-content-end">
          <form method="POST" action="{{ route('log-analysis.reanalyze', $logCollection) }}">
            @csrf
            <button class="btn btn-outline-secondary btn-sm"><i class="bi bi-arrow-repeat me-1"></i>重新分析</button>
          </form>
          <form method="POST" action="{{ route('log-analysis.destroy', $logCollection) }}" onsubmit="return confirm('確認刪除此 Log 及分析結果？')">
            @csrf @method('DELETE')
            <button class="btn btn-outline-danger btn-sm"><i class="bi bi-trash"></i></button>
          </form>
        </div>
      </div>
    </div>
  </div>

  {{-- 嚴重度快篩 --}}
  <div class="mb-3 d-flex gap-2 flex-wrap align-items-center">
    <a href="{{ route('log-analysis.show', $logCollection) }}" class="btn btn-sm {{ !$severity ? 'btn-secondary' : 'btn-outline-secondary' }}">全部 ({{ number_format($logCollection->line_count) }})</a>
    @php
      $sevOrder = ['emergency','alert','critical','error','warning','notice','info','debug','unknown'];
      $sevColor = \App\Models\LogEntry::$SEVERITY_COLOR;
      $sevLabel = ['emergency'=>'Emergency','alert'=>'Alert','critical'=>'Critical','error'=>'Error','warning'=>'Warning','notice'=>'Notice','info'=>'Info','debug'=>'Debug','unknown'=>'Unknown'];
    @endphp
    @foreach($sevOrder as $sv)
      @if(isset($severityCounts[$sv]) && $severityCounts[$sv] > 0)
      <a href="{{ route('log-analysis.show', $logCollection) }}?severity={{ $sv }}&search={{ urlencode($search) }}"
         class="btn btn-sm {{ $severity === $sv ? 'btn-'.$sevColor[$sv] : 'btn-outline-'.$sevColor[$sv] }}">
        {{ $sevLabel[$sv] }} ({{ number_format($severityCounts[$sv]) }})
      </a>
      @endif
    @endforeach

    {{-- 搜尋 --}}
    <form method="GET" action="{{ route('log-analysis.show', $logCollection) }}" class="d-flex ms-auto gap-1">
      <input type="hidden" name="severity" value="{{ $severity }}">
      <input type="text" name="search" class="form-control form-control-sm" style="width:220px" value="{{ $search }}" placeholder="搜尋關鍵字…">
      <button class="btn btn-primary btn-sm"><i class="bi bi-search"></i></button>
      @if($search)
      <a href="{{ route('log-analysis.show', $logCollection) }}?severity={{ $severity }}" class="btn btn-outline-secondary btn-sm">清除</a>
      @endif
    </form>
  </div>

  {{-- Log 內容表格 --}}
  <div class="card border-0 shadow-sm">
    <div class="table-responsive">
      <table class="table table-sm table-hover align-middle mb-0 font-monospace" style="font-size:0.8rem">
        <thead class="table-light">
          <tr>
            <th style="width:130px">時間</th>
            <th style="width:80px">嚴重度</th>
            <th style="width:120px">程序</th>
            <th>訊息</th>
          </tr>
        </thead>
        <tbody>
          @forelse($entries as $entry)
          <tr class="{{ in_array($entry->severity, ['error','critical','alert','emergency']) ? 'table-danger' : ($entry->severity === 'warning' ? 'table-warning' : '') }}">
            <td class="text-muted small">{{ $entry->logged_at?->format('m/d H:i:s') ?? '—' }}</td>
            <td>
              <span class="badge bg-{{ $entry->severityColor() }} bg-opacity-75" style="font-size:0.7rem">{{ strtoupper($entry->severity) }}</span>
            </td>
            <td class="text-muted small text-truncate" style="max-width:120px" title="{{ $entry->process }}{{ $entry->pid ? '['.$entry->pid.']' : '' }}">
              {{ $entry->process ?? '—' }}{{ $entry->pid ? '['.$entry->pid.']' : '' }}
            </td>
            <td class="text-break">{{ $entry->message }}</td>
          </tr>
          @empty
          <tr><td colspan="4" class="text-center text-muted py-4">
            @if($severity || $search)
              找不到符合條件的記錄
            @else
              尚無解析的 Log 項目
            @endif
          </td></tr>
          @endforelse
        </tbody>
      </table>
    </div>
    @if($entries->hasPages())
    <div class="card-footer bg-white py-2">
      {{ $entries->links() }}
    </div>
    @endif
  </div>

  {{-- ── 分析報告 ─────────────────────────────────────────────────── --}}
  @if($reportErrors->isNotEmpty() || $reportProcesses->isNotEmpty())
  <div class="mt-4">
    <div class="d-flex align-items-center mb-2 gap-2">
      <i class="bi bi-bar-chart-fill text-danger"></i>
      <h6 class="mb-0 fw-bold">此 Log 分析報告</h6>
      <span class="text-muted small">— {{ $logCollection->created_at->format('Y-m-d H:i') }} 收到，{{ number_format($logCollection->line_count) }} 行</span>
    </div>

    <div class="row g-3">

      {{-- 重複錯誤事件 --}}
      @if($reportErrors->isNotEmpty())
      <div class="col-lg-8">
        <div class="card border-0 shadow-sm">
          <div class="card-header py-2 bg-white d-flex align-items-center gap-2">
            <i class="bi bi-exclamation-triangle-fill text-danger"></i>
            <span class="fw-semibold small">重複出現的錯誤事件</span>
            <span class="badge bg-danger rounded-pill ms-1" style="font-size:.6rem">{{ $reportErrors->count() }} 種</span>
            <span class="text-muted ms-auto" style="font-size:.7rem">出現 ≥ 2 次的 Error / Critical</span>
          </div>
          <div class="card-body p-0">
            <div class="table-responsive">
              <table class="table table-sm table-hover mb-0 align-middle">
                <thead class="table-light">
                  <tr>
                    <th style="width:55px" class="text-center ps-3">次數</th>
                    <th style="width:75px">嚴重度</th>
                    <th>錯誤訊息</th>
                    <th style="width:160px">建議處置</th>
                  </tr>
                </thead>
                <tbody>
                  @php
                    $solutions = [
                      'Failed password'        => ['SSH 暴力破解', '啟用 fail2ban 封鎖惡意 IP'],
                      'Invalid user'           => ['SSH 非法帳號', '確認是否有弱帳號，考慮 AllowUsers'],
                      'Connection refused'     => ['服務無回應', '確認目標服務是否正常啟動'],
                      'permission denied'      => ['權限不足', '檢查 owner / chmod 設定'],
                      'disk quota'             => ['磁碟配額超出', '清理舊 log 或擴充空間'],
                      'out of memory'          => ['記憶體不足', '增加 swap 或調整記憶體限制'],
                      'no space left'          => ['磁碟已滿', '立即清理 /tmp 或日誌目錄'],
                      'segfault'               => ['程序崩潰 (SIGSEGV)', '查 core dump，更新程式版本'],
                      'certificate'            => ['SSL 憑證問題', '更新或重新申請 TLS 憑證'],
                      'ssl'                    => ['SSL 錯誤', '確認憑證鏈完整，檢查到期日'],
                      'timeout'                => ['連線逾時', '確認網路延遲或增加 timeout 設定'],
                      'authentication failure' => ['驗證失敗', '確認密碼 / 金鑰是否正確'],
                      'CRON'                   => ['Cron 執行失敗', '查 cron job 腳本的錯誤輸出'],
                      'kernel'                 => ['Kernel 警告', '執行 dmesg 並確認硬體狀況'],
                      'mysql'                  => ['資料庫錯誤', '查 MySQL slow query / error log'],
                      'OOM'                    => ['OOM Killer 觸發', '程序被系統強制終止，增加記憶體'],
                      'oom'                    => ['OOM Killer 觸發', '程序被系統強制終止，增加記憶體'],
                      'unable to stat'         => ['檔案不存在', '確認對應路徑檔案是否存在'],
                      'script not found'       => ['Script 遺失', '確認 PHP 腳本路徑正確'],
                    ];
                    $getSol = function(string $msg) use ($solutions) {
                      $lower = strtolower($msg);
                      foreach ($solutions as $kw => [$lbl, $tip]) {
                        if (str_contains($lower, strtolower($kw))) return compact('lbl','tip');
                      }
                      return null;
                    };
                  @endphp
                  @foreach($reportErrors as $err)
                  @php $sol = $getSol($err->message); @endphp
                  <tr>
                    <td class="text-center ps-3">
                      <span class="badge bg-danger rounded-pill">{{ number_format($err->cnt) }}</span>
                    </td>
                    <td>
                      @php
                        $sc = match($err->severity) {
                          'critical','alert','emergency' => 'dark',
                          default => 'danger',
                        };
                      @endphp
                      <span class="badge bg-{{ $sc }}-subtle text-{{ $sc }} border border-{{ $sc }}-subtle" style="font-size:.62rem">
                        {{ strtoupper($err->severity) }}
                      </span>
                    </td>
                    <td class="font-monospace small text-break" style="font-size:.76rem">
                      {{ Str::limit($err->message, 120) }}
                    </td>
                    <td class="small">
                      @if($sol)
                        <span class="fw-semibold text-danger d-block" style="font-size:.7rem">{{ $sol['lbl'] }}</span>
                        <span class="text-muted" style="font-size:.68rem">{{ $sol['tip'] }}</span>
                      @else
                        <span class="text-muted" style="font-size:.7rem">—</span>
                      @endif
                    </td>
                  </tr>
                  @endforeach
                </tbody>
              </table>
            </div>
          </div>
        </div>
      </div>
      @endif

      {{-- 有錯誤的程序排行 --}}
      @if($reportProcesses->isNotEmpty())
      <div class="col-lg-4">
        <div class="card border-0 shadow-sm h-100">
          <div class="card-header py-2 bg-white d-flex align-items-center gap-2">
            <i class="bi bi-cpu text-warning"></i>
            <span class="fw-semibold small">程序錯誤排行</span>
          </div>
          <div class="card-body p-0">
            <div class="table-responsive"><table class="table table-sm table-hover mb-0 align-middle">
              <thead class="table-light">
                <tr>
                  <th class="ps-3">程序名稱</th>
                  <th class="text-center">Error</th>
                  <th class="text-center">總行數</th>
                </tr>
              </thead>
              <tbody>
                @foreach($reportProcesses as $proc)
                <tr>
                  <td class="ps-3 font-monospace small text-truncate" style="max-width:140px">
                    {{ $proc->process }}
                  </td>
                  <td class="text-center">
                    <span class="badge bg-danger-subtle text-danger border border-danger-subtle" style="font-size:.65rem">
                      {{ number_format($proc->errs) }}
                    </span>
                  </td>
                  <td class="text-center text-muted small">{{ number_format($proc->cnt) }}</td>
                </tr>
                @endforeach
              </tbody>
            </table></div>
          </div>
          <div class="card-footer bg-light py-2 small text-muted">
            <i class="bi bi-lightbulb me-1 text-warning"></i>
            點擊上方嚴重度篩選「Error」可查看完整錯誤行
          </div>
        </div>
      </div>
      @endif

    </div>{{-- /row --}}
  </div>{{-- /report --}}
  @elseif($logCollection->status === 'done' && $logCollection->error_count === 0)
  <div class="mt-4 alert alert-success border-0 shadow-sm d-flex align-items-center gap-2">
    <i class="bi bi-check-circle-fill fs-5"></i>
    <span>此 Log 分析完成，未發現任何 Error 或 Critical 事件。</span>
  </div>
  @endif

</div>
@endsection