@extends('layouts.app')
@section('title', $project->name . ' — 文件')

@section('content')
@include('projects._nav')

<div class="container-fluid px-4 py-4">

  @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

  <div class="d-flex justify-content-between align-items-center mb-4">
    <h4 class="mb-0 fw-bold"><i class="bi bi-folder2-open me-2"></i>{{ $project->name }} — 文件</h4>
  </div>

  <div class="row g-4">

    {{-- 文件列表 --}}
    <div class="col-lg-8">
      <div class="card shadow-sm">
        <div class="card-header bg-white">
          <h6 class="mb-0 fw-bold"><i class="bi bi-files me-2"></i>文件列表 ({{ $files->count() }})</h6>
        </div>

        @if($files->isEmpty())
          <div class="card-body text-center py-5 text-muted">
            <i class="bi bi-folder2 fs-1 d-block mb-2"></i>
            尚未上傳任何文件。
          </div>
        @else
          <div class="list-group list-group-flush">
            @foreach($files as $file)
              @php
                $ext  = strtolower(pathinfo($file->filename, PATHINFO_EXTENSION));
                $icon = match(true) {
                    in_array($ext, ['jpg','jpeg','png','gif','webp']) => 'bi-file-image text-success',
                    $ext === 'pdf'                                    => 'bi-file-pdf text-danger',
                    in_array($ext, ['doc','docx'])                   => 'bi-file-word text-primary',
                    in_array($ext, ['xls','xlsx'])                   => 'bi-file-excel text-success',
                    in_array($ext, ['zip','rar','7z','gz','tar'])    => 'bi-file-zip text-warning',
                    default                                          => 'bi-file-earmark text-secondary',
                };
              @endphp
              <div class="list-group-item py-3" id="file-{{ $file->id }}">
                <div class="d-flex align-items-start gap-3">
                  <i class="bi {{ $icon }} fs-3 flex-shrink-0 mt-1"></i>
                  <div class="flex-grow-1 min-w-0">
                    <div class="d-flex justify-content-between align-items-start">
                      <a href="{{ Storage::disk('public')->url($file->path) }}" target="_blank"
                         class="fw-semibold text-decoration-none fs-6">{{ $file->filename }}</a>
                      @can('update', $project)
                        <div class="d-flex gap-1 flex-shrink-0 ms-2">
                          <button class="btn btn-sm btn-outline-secondary"
                                  onclick="toggleEdit({{ $file->id }})">
                            <i class="bi bi-pencil"></i>
                          </button>
                          <form action="{{ route('projects.files.destroy', [$project, $file]) }}"
                                method="POST" onsubmit="return confirm('確定刪除「{{ $file->filename }}」？');">
                            @csrf @method('DELETE')
                            <button type="submit" class="btn btn-sm btn-outline-danger">
                              <i class="bi bi-trash"></i>
                            </button>
                          </form>
                        </div>
                      @endcan
                    </div>

                    {{-- 說明（靜態） --}}
                    <div id="desc-text-{{ $file->id }}" class="text-muted small mt-1">
                      {{ $file->description ?: '（無說明）' }}
                    </div>

                    {{-- 說明（編輯表單，預設隱藏） --}}
                    @can('update', $project)
                    <form id="desc-form-{{ $file->id }}"
                          action="{{ route('projects.files.update', [$project, $file]) }}"
                          method="POST" class="mt-2 d-none">
                      @csrf @method('PATCH')
                      <div class="input-group input-group-sm">
                        <input type="text" name="description" class="form-control"
                               value="{{ $file->description }}" placeholder="輸入說明…" maxlength="500">
                        <button type="submit" class="btn btn-primary btn-sm">儲存</button>
                        <button type="button" class="btn btn-outline-secondary btn-sm"
                                onclick="toggleEdit({{ $file->id }})">取消</button>
                      </div>
                    </form>
                    @endcan

                    <div class="text-muted small mt-1">
                      <i class="bi bi-person me-1"></i>{{ $file->uploader ?? '—' }}
                      <span class="mx-2">·</span>
                      <i class="bi bi-clock me-1"></i>{{ $file->created_at->format('Y-m-d') }}
                    </div>
                  </div>
                </div>
              </div>
            @endforeach
          </div>
        @endif
      </div>
    </div>

    {{-- 上傳區 --}}
    @can('update', $project)
    <div class="col-lg-4">
      <div class="card shadow-sm">
        <div class="card-header bg-white">
          <h6 class="mb-0 fw-bold"><i class="bi bi-upload me-2"></i>上傳文件</h6>
        </div>
        <div class="card-body">
          <form action="{{ route('projects.files.store', $project) }}" method="POST" enctype="multipart/form-data">
            @csrf
            <div class="mb-3">
              <label class="form-label" for="file">選擇檔案 <small class="text-muted">（最大 100 MB）</small></label>
              <input type="file" name="file" class="form-control @error('file') is-invalid @enderror" required id="file">
              @error('file')<div class="invalid-feedback">{{ $message }}</div>@enderror
            </div>
            <div class="mb-3">
              <label class="form-label" for="description">說明（選填）</label>
              <input type="text" name="description" class="form-control" placeholder="檔案說明…" maxlength="500" id="description">
            </div>
            <button type="submit" class="btn btn-primary w-100">
              <i class="bi bi-upload me-1"></i>上傳
            </button>
          </form>
        </div>
      </div>
    </div>
    @endcan

  </div>
</div>

@push('scripts')
<script>
function toggleEdit(id) {
  document.getElementById('desc-text-' + id).classList.toggle('d-none');
  document.getElementById('desc-form-' + id).classList.toggle('d-none');
}
</script>
@endpush
@endsection