@extends('layouts.app')

@section('title', 'Knowledge Base')

@section('content')

<div class="page-header">
    <div>
        <h1 class="page-title">Knowledge Base</h1>
        <p class="page-subtitle">Sumber pengetahuan chatbot AI — {{ $stats['in_chatbot'] }} aktif di chatbot</p>
    </div>
    @can('create kb')
    <div class="page-actions">
        <a href="{{ route('kb.create', ['source' => 'text']) }}" class="btn btn-secondary">
            <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"/></svg>
            Input Teks
        </a>
        <a href="{{ route('kb.create', ['source' => 'pdf']) }}" class="btn btn-secondary">
            <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/></svg>
            Upload PDF
        </a>
        <a href="{{ route('kb.create', ['source' => 'url']) }}" class="btn btn-primary">
            <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M21 12a9 9 0 01-9 9m9-9a9 9 0 00-9-9m9 9H3m9 9a9 9 0 01-9-9m9 9c1.657 0 3-4.03 3-9s-1.343-9-3-9m0 18c-1.657 0-3-4.03-3-9s1.343-9 3-9m-9 9a9 9 0 019-9"/></svg>
            Scrape URL
        </a>
    </div>
    @endcan
</div>

{{-- Stats --}}
<div class="stats-grid" style="grid-template-columns:repeat(5,1fr);margin-bottom:1rem;">
    <div class="stat-card">
        <div class="stat-icon blue">
            <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M12 6.253v13m0-13C10.832 5.477 9.246 5 7.5 5S4.168 5.477 3 6.253v13C4.168 18.477 5.754 18 7.5 18s3.332.477 4.5 1.253m0-13C13.168 5.477 14.754 5 16.5 5c1.747 0 3.332.477 4.5 1.253v13C19.832 18.477 18.247 18 16.5 18c-1.746 0-3.332.477-4.5 1.253"/></svg>
        </div>
        <div>
            <div class="stat-value">{{ $stats['total'] }}</div>
            <div class="stat-label">Total Entri</div>
        </div>
    </div>
    <div class="stat-card">
        <div class="stat-icon green">
            <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"/></svg>
        </div>
        <div>
            <div class="stat-value">{{ $stats['in_chatbot'] }}</div>
            <div class="stat-label">Aktif di Chatbot</div>
        </div>
    </div>
    <div class="stat-card">
        <div class="stat-icon purple">
            <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z"/></svg>
        </div>
        <div>
            <div class="stat-value">{{ $stats['by_source']['pdf'] ?? 0 }}</div>
            <div class="stat-label">Dari PDF</div>
        </div>
    </div>
    <div class="stat-card">
        <div class="stat-icon amber">
            <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M21 12a9 9 0 01-9 9m9-9a9 9 0 00-9-9m9 9H3m9 9a9 9 0 01-9-9m9 9c1.657 0 3-4.03 3-9s-1.343-9-3-9m0 18c-1.657 0-3-4.03-3-9s1.343-9 3-9m-9 9a9 9 0 019-9"/></svg>
        </div>
        <div>
            <div class="stat-value">{{ $stats['by_source']['url'] ?? 0 }}</div>
            <div class="stat-label">Dari URL</div>
        </div>
    </div>
    <div class="stat-card">
        <div class="stat-icon green">
            <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M9 7h6m0 10v-3m-3 3h.01M9 17h.01M9 14h.01M12 14h.01M15 11h.01M12 11h.01M9 11h.01M7 21h10a2 2 0 002-2V5a2 2 0 00-2-2H7a2 2 0 00-2 2v14a2 2 0 002 2z"/></svg>
        </div>
        <div>
            <div class="stat-value">~{{ number_format($stats['total_tokens']) }}</div>
            <div class="stat-label">Est. Token AI</div>
        </div>
    </div>
</div>

{{-- Filter --}}
<div class="card" style="margin-bottom:1rem;">
    <div class="card-body" style="padding:.75rem 1.25rem;">
        <form method="GET" action="{{ route('kb.index') }}">
            <div style="display:flex;gap:.75rem;flex-wrap:wrap;align-items:center;">
                <div style="flex:1;min-width:200px;position:relative;">
                    <span style="position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:var(--gray-400);">
                        <svg fill="none" viewBox="0 0 24 24" stroke="currentColor" style="width:16px;height:16px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z"/></svg>
                    </span>
                    <input type="text" name="search" value="{{ request('search') }}" placeholder="Cari judul / konten..." class="form-control" style="padding-left:2.25rem;" onchange="this.form.submit()">
                </div>
                <select name="category" class="form-control" style="width:160px;" onchange="this.form.submit()">
                    <option value="">Semua Kategori</option>
                    @foreach(\App\Models\KnowledgeBase::CATEGORY_LABELS as $val => $label)
                    <option value="{{ $val }}" {{ request('category') === $val ? 'selected' : '' }}>{{ $label }}</option>
                    @endforeach
                </select>
                <select name="source_type" class="form-control" style="width:140px;" onchange="this.form.submit()">
                    <option value="">Semua Sumber</option>
                    @foreach(\App\Models\KnowledgeBase::SOURCE_LABELS as $val => $label)
                    <option value="{{ $val }}" {{ request('source_type') === $val ? 'selected' : '' }}>{{ $label }}</option>
                    @endforeach
                </select>
                <select name="status" class="form-control" style="width:120px;" onchange="this.form.submit()">
                    <option value="">Semua Status</option>
                    @foreach(\App\Models\KnowledgeBase::STATUS_LABELS as $val => $label)
                    <option value="{{ $val }}" {{ request('status') === $val ? 'selected' : '' }}>{{ $label }}</option>
                    @endforeach
                </select>
                @if(request()->hasAny(['search','category','source_type','status']))
                <a href="{{ route('kb.index') }}" class="btn btn-ghost btn-sm">Reset</a>
                @endif
            </div>
        </form>
    </div>
</div>

{{-- Token warning --}}
@if($stats['total_tokens'] > 3000)
<div style="background:var(--warning-light);border:1px solid var(--warning);border-radius:var(--radius);padding:.75rem 1rem;margin-bottom:1rem;display:flex;align-items:center;gap:.625rem;">
    <svg fill="none" viewBox="0 0 24 24" stroke="var(--warning)" style="width:18px;height:18px;flex-shrink:0;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"/></svg>
    <span style="font-size:.8125rem;color:#92400e;">
        <strong>Perhatian:</strong> Total estimasi token knowledge base (~{{ number_format($stats['total_tokens']) }}) sudah besar.
        Terlalu banyak konten dapat mengurangi akurasi AI atau melebihi batas context window.
        Pertimbangkan untuk menonaktifkan entri yang jarang digunakan.
    </span>
</div>
@endif

{{-- Table --}}
<div class="card">
    <div class="table-wrapper">
        @if($items->isEmpty())
        <div class="empty-state">
            <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M12 6.253v13m0-13C10.832 5.477 9.246 5 7.5 5S4.168 5.477 3 6.253v13C4.168 18.477 5.754 18 7.5 18s3.332.477 4.5 1.253m0-13C13.168 5.477 14.754 5 16.5 5c1.747 0 3.332.477 4.5 1.253v13C19.832 18.477 18.247 18 16.5 18c-1.746 0-3.332.477-4.5 1.253"/></svg>
            <div class="empty-state-title">Belum ada knowledge base</div>
            <p class="empty-state-text">Tambahkan pengetahuan agar chatbot bisa menjawab lebih akurat</p>
            @can('create kb')
            <div class="page-actions" style="justify-content:center;">
                <a href="{{ route('kb.create', ['source' => 'text']) }}" class="btn btn-secondary btn-sm">Input Teks</a>
                <a href="{{ route('kb.create', ['source' => 'pdf']) }}" class="btn btn-secondary btn-sm">Upload PDF</a>
                <a href="{{ route('kb.create', ['source' => 'url']) }}" class="btn btn-primary btn-sm">Scrape URL</a>
            </div>
            @endcan
        </div>
        @else
        <table>
            <thead>
                <tr>
                    <th>Judul</th>
                    <th>Kategori</th>
                    <th>Sumber</th>
                    <th>Ukuran</th>
                    <th>Status</th>
                    <th>Chatbot</th>
                    <th>Aktif</th>
                    <th>Diperbarui</th>
                    <th style="text-align:right;">Aksi</th>
                </tr>
            </thead>
            <tbody>
                @foreach($items as $item)
                <tr>
                    <td>
                        <a href="{{ route('kb.show', $item) }}" class="fw-600" style="color:var(--gray-900);text-decoration:none;">
                            {{ $item->title }}
                        </a>
                        @if($item->summary)
                        <div class="text-small text-muted truncate" style="max-width:220px;">{{ $item->summary }}</div>
                        @endif
                    </td>
                    <td><span class="badge badge-blue" style="font-size:.6875rem;">{{ $item->category_label }}</span></td>
                    <td>
                        <div style="display:flex;align-items:center;gap:.375rem;">
                            @if($item->source_type === 'pdf')
                            <svg fill="none" viewBox="0 0 24 24" stroke="var(--danger)" style="width:14px;height:14px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/></svg>
                            @elseif($item->source_type === 'url')
                            <svg fill="none" viewBox="0 0 24 24" stroke="var(--info)" style="width:14px;height:14px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M21 12a9 9 0 01-9 9m9-9a9 9 0 00-9-9m9 9H3m9 9a9 9 0 01-9-9m9 9c1.657 0 3-4.03 3-9s-1.343-9-3-9m0 18c-1.657 0-3-4.03-3-9s1.343-9 3-9m-9 9a9 9 0 019-9"/></svg>
                            @else
                            <svg fill="none" viewBox="0 0 24 24" stroke="var(--gray-400)" style="width:14px;height:14px;"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"/></svg>
                            @endif
                            <span class="text-small">{{ $item->source_label }}</span>
                        </div>
                    </td>
                    <td>
                        <div class="text-small">{{ $item->formatted_char_count }}</div>
                        <div style="font-size:.6875rem;color:var(--gray-400);">~{{ number_format($item->token_estimate) }} token</div>
                    </td>
                    <td><span class="badge badge-{{ $item->status_color }}">{{ $item->status_label }}</span></td>
                    <td>
                        <form method="POST" action="{{ route('kb.toggle', $item) }}">
                            @csrf
                            <input type="hidden" name="field" value="chatbot">
                            <button type="submit" style="background:none;border:none;cursor:pointer;padding:0;" title="{{ $item->use_in_chatbot ? 'Nonaktifkan dari chatbot' : 'Aktifkan ke chatbot' }}">
                                <span class="badge badge-{{ $item->use_in_chatbot ? 'green' : 'gray' }}">
                                    {{ $item->use_in_chatbot ? '🤖 Ya' : 'Tidak' }}
                                </span>
                            </button>
                        </form>
                    </td>
                    <td>
                        <form method="POST" action="{{ route('kb.toggle', $item) }}">
                            @csrf
                            <input type="hidden" name="field" value="active">
                            <button type="submit" style="background:none;border:none;cursor:pointer;padding:0;" title="Toggle aktif">
                                <span class="badge badge-{{ $item->is_active ? 'green' : 'gray' }}">
                                    {{ $item->is_active ? 'Aktif' : 'Nonaktif' }}
                                </span>
                            </button>
                        </form>
                    </td>
                    <td class="text-small text-muted">{{ $item->updated_at->locale('id')->diffForHumans() }}</td>
                    <td>
                        <div style="display:flex;gap:.25rem;justify-content:flex-end;">
                            <a href="{{ route('kb.show', $item) }}" class="btn btn-ghost btn-sm btn-icon" title="Detail">
                                <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z"/><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z"/></svg>
                            </a>
                            @can('edit kb')
                            <a href="{{ route('kb.edit', $item) }}" class="btn btn-ghost btn-sm btn-icon" title="Edit">
                                <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"/></svg>
                            </a>
                            @endcan
                            @if($item->source_type === 'url')
                            <form method="POST" action="{{ route('kb.rescrape', $item) }}">
                                @csrf
                                <button type="submit" class="btn btn-ghost btn-sm btn-icon" title="Scrape ulang" style="color:var(--info);">
                                    <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15"/></svg>
                                </button>
                            </form>
                            @endif
                            @can('delete kb')
                            <button type="button" class="btn btn-ghost btn-sm btn-icon" style="color:var(--danger);"
                                    onclick="confirmDelete('{{ route('kb.destroy', $item) }}', '{{ $item->title }}')">
                                <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.75" d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"/></svg>
                            </button>
                            @endcan
                        </div>
                    </td>
                </tr>
                @endforeach
            </tbody>
        </table>
        @endif
    </div>
    @if($items->hasPages())
    <div class="pagination-wrapper">
        <div class="pagination-info">{{ $items->firstItem() }}–{{ $items->lastItem() }} dari {{ $items->total() }}</div>
        <div class="pagination">
            @if(!$items->onFirstPage())<a class="page-link" href="{{ $items->previousPageUrl() }}">‹</a>@endif
            @foreach($items->getUrlRange(max(1,$items->currentPage()-2),min($items->lastPage(),$items->currentPage()+2)) as $p => $url)
            <a class="page-link {{ $p===$items->currentPage()?'active':'' }}" href="{{ $url }}">{{ $p }}</a>
            @endforeach
            @if($items->hasMorePages())<a class="page-link" href="{{ $items->nextPageUrl() }}">›</a>@endif
        </div>
    </div>
    @endif
</div>

{{-- Delete Modal --}}
<div class="modal-overlay" id="deleteModal">
    <div class="modal" style="max-width:420px;">
        <div class="modal-header">
            <span class="modal-title">Hapus Knowledge Base</span>
            <button class="modal-close" onclick="closeModal('deleteModal')">
                <svg fill="none" viewBox="0 0 24 24" stroke="currentColor"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"/></svg>
            </button>
        </div>
        <div class="modal-body">
            <p style="color:var(--gray-600);">Hapus knowledge base <strong id="deleteKbName"></strong>? Konten ini akan dihapus permanen dari sistem dan chatbot.</p>
        </div>
        <div class="modal-footer">
            <button class="btn btn-secondary" onclick="closeModal('deleteModal')">Batal</button>
            <form id="deleteForm" method="POST">
                @csrf @method('DELETE')
                <button type="submit" class="btn btn-danger">Hapus</button>
            </form>
        </div>
    </div>
</div>

@endsection

@push('scripts')
<script>
function confirmDelete(url, name) {
    document.getElementById('deleteForm').action = url;
    document.getElementById('deleteKbName').textContent = name;
    openModal('deleteModal');
}
</script>
@endpush