{{-- resources/views/agent/files/show.blade.php --}}
@extends('layouts.contentLayoutMaster')

@php
    use Illuminate\Support\Facades\Route as Routes;
    use Illuminate\Support\Facades\Storage as Disk;
    use Illuminate\Support\Facades\URL as UrlGen;
    use Illuminate\Support\Str;

    // Title setup
    $title = $file->title ?? $file->name ?? $file->original_name ?? 'Document';

    // File location and URLs
    $path = $file->stored_path ?? $file->path ?? null; // should be agent-files/1/documents/2025/09/filename.docx
    $publicOk  = $path ? Disk::disk('public')->exists($path) : false;
    $publicUrl = ($publicOk && $path) ? Disk::disk('public')->url($path) : null;

    // Download/stream URLs
    $streamUrl   = ($path && Routes::has('agent.files.stream'))   ? route('agent.files.stream',   $file->id) : null;
    $downloadUrl = ($path && Routes::has('agent.files.download')) ? route('agent.files.download', $file->id) : ($publicUrl ?: null);

    // Safe back URL
    $backDefault = Routes::has('agent.files.index')
        ? route('agent.files.index')
        : (Routes::has('agent.dashboard') ? route('agent.dashboard') : (url()->previous() ?: url('/')));
    $backUrl = request('return', $backDefault);

    // File meta
    $mime = $file->mime ?? $file->mime_type ?? '';
    $ext  = strtolower(pathinfo($file->original_name ?? $file->name ?? '', PATHINFO_EXTENSION));

    $isImage = Str::startsWith($mime, 'image/');
    $isPdf   = ($mime === 'application/pdf') || ($ext === 'pdf');

    $sizeBytes = (int)($file->size ?? $file->filesize ?? 0);
    $humanSize = function ($bytes) {
        $units = ['B','KB','MB','GB','TB']; $i=0;
        while ($bytes >= 1024 && $i < count($units)-1) { $bytes /= 1024; $i++; }
        return number_format($bytes, $i ? 2 : 0) . ' ' . $units[$i];
    };

    // Prefer HTTPS for Office Viewer
    $publicFullUrl = $publicUrl
        ? (Str::startsWith($publicUrl, ['http://','https://']) ? $publicUrl : url($publicUrl))
        : null;
    if ($publicFullUrl && Str::startsWith($publicFullUrl, 'http://')) {
        if (request()->isSecure() || Str::startsWith((string) config('app.url'), 'https://')) {
            $publicFullUrl = preg_replace('#^http://#', 'https://', $publicFullUrl);
        }
    }

    // Signed temporary public URL fallback
    $shareUrl = null;
    if (Routes::has('public.files.show') && $path) {
        $shareUrl = UrlGen::temporarySignedRoute(
            'public.files.show',
            now()->addMinutes(30),
            [
                'id'       => $file->id,
                'filename' => $file->original_name ?? $file->name ?? ('document.' . ($ext ?: 'bin')),
            ]
        );
    }

    // Use whichever is available
    $viewableUrl = $publicFullUrl ?: $shareUrl;

    // Office formats detection
    $isOfficeDoc = in_array($ext, ['doc','docx','ppt','pptx','xls','xlsx'], true)
        || Str::contains($mime, ['officedocument','msword','vnd.ms-powerpoint','vnd.ms-excel']);

    $officeEmbedUrl = ($viewableUrl && $isOfficeDoc)
        ? 'https://view.officeapps.live.com/op/embed.aspx?src=' . urlencode($viewableUrl)
        : null;

    $googleEmbedUrl = ($viewableUrl && $isOfficeDoc)
        ? 'https://docs.google.com/gview?embedded=1&url=' . urlencode($viewableUrl)
        : null;
@endphp

@section('title', $title)

@section('content')
@if (!Routes::has('agent.files.index'))
    <script>window.location.replace(@json($backUrl));</script>
@endif

<div class="container py-4" style="max-width:980px">
    {{-- Flash --}}
    @if(session('success'))
        <div class="alert alert-success">{{ session('success') }}</div>
    @endif
    @if(session('error'))
        <div class="alert alert-danger">{{ session('error') }}</div>
    @endif

    <div class="d-flex justify-content-between align-items-center mb-3">
        <h4 class="mb-0">{{ $title }}</h4>
        <div class="d-flex gap-2">
            <a href="{{ $backUrl }}" class="btn btn-sm btn-outline-secondary">Back</a>
            @if($downloadUrl)
                <a class="btn btn-sm btn-primary" href="{{ $downloadUrl }}" target="_blank" rel="noopener">Open / Download</a>
            @endif
        </div>
    </div>

    {{-- Debug info for troubleshooting Word doc preview --}}
    @if($isOfficeDoc)
    <div class="alert alert-secondary">
      <strong>Preview debug info:</strong><br>
      Public URL: <a href="{{ $publicFullUrl }}" target="_blank">{{ $publicFullUrl }}</a><br>
      Office embed URL: <a href="{{ $officeEmbedUrl }}" target="_blank">{{ $officeEmbedUrl }}</a><br>
      Google embed URL: <a href="{{ $googleEmbedUrl }}" target="_blank">{{ $googleEmbedUrl }}</a><br>
      Storage Path: <code>{{ $path }}</code><br>
      MIME: {{ $mime }} | Extension: {{ $ext }}
    </div>
    @endif

    @if (!$path)
        <div class="alert alert-warning">No file is attached to this record.</div>
    @else
        <div class="card mb-3">
            <div class="card-body d-flex flex-wrap justify-content-between align-items-center gap-2">
                <p class="text-muted mb-0">
                    <strong>MIME:</strong> {{ $mime ?: 'n/a' }}
                    @if($sizeBytes > 0)
                        &nbsp; • &nbsp; <strong>Size:</strong> {{ $humanSize($sizeBytes) }}
                    @endif
                </p>

                <div class="d-flex gap-2">
                    @if($googleEmbedUrl)
                        <a class="btn btn-sm btn-outline-secondary" href="{{ $googleEmbedUrl }}" target="_blank" rel="noopener">
                            Alternate Viewer (Google)
                        </a>
                    @endif
                    @if($viewableUrl)
                        <a class="btn btn-sm btn-outline-secondary" href="{{ $viewableUrl }}" target="_blank" rel="noopener">
                            Open Viewable URL
                        </a>
                    @endif
                </div>
            </div>
        </div>

        {{-- Preview priority: Office docs (Office Online) → Google viewer → stream → image/pdf --}}
        @if ($officeEmbedUrl)
            <div class="card">
                <div class="card-header">Preview</div>
                <div class="card-body p-0">
                    <iframe src="{{ $officeEmbedUrl }}" title="Preview: {{ $title }}" loading="lazy" style="width:100%; min-height:70vh; border:0;">
                      This is an embedded <a target='_blank' href='http://office.com'>Microsoft Office</a> document, powered by <a target='_blank' href='http://office.com/webapps'>Office Online</a>.
                    </iframe>
                </div>
            </div>
        @elseif ($googleEmbedUrl)
            <div class="card">
                <div class="card-header">Preview (Google Viewer)</div>
                <div class="card-body p-0">
                    <iframe src="{{ $googleEmbedUrl }}" title="Preview: {{ $title }}" loading="lazy" style="width:100%; min-height:70vh; border:0;">
                      Your browser does not support embedding. <a target='_blank' href="{{ $googleEmbedUrl }}">Try Alternate Viewer</a>.
                    </iframe>
                </div>
            </div>
        @elseif ($streamUrl)
            <div class="card">
                <div class="card-header">Preview</div>
                <div class="card-body p-0">
                    <iframe src="{{ $streamUrl }}" title="Preview: {{ $title }}" loading="lazy" style="width:100%; min-height:70vh; border:0;"></iframe>
                </div>
            </div>
        @elseif ($publicUrl && ($isImage || $isPdf))
            @if($isImage)
                <div class="card">
                    <div class="card-header">Preview</div>
                    <div class="card-body text-center">
                        <img src="{{ $publicUrl }}" alt="{{ $title }}" class="img-fluid rounded border" style="max-height:70vh;">
                    </div>
                </div>
            @else
                <div class="card">
                    <div class="card-header">Preview</div>
                    <div class="card-body p-0">
                        <iframe src="{{ $publicUrl }}" title="Preview: {{ $title }}" loading="lazy" style="width:100%; min-height:70vh; border:0;"></iframe>
                    </div>
                </div>
            @endif
        @else
            <div class="alert alert-info">
                Preview not available for this file type or the public URL isn't accessible.<br>
                @if(!$publicUrl && !$downloadUrl)
                    <div class="small mt-1">
                        Tip: ensure the file is on the <code>public</code> disk or use the signed link above.
                    </div>
                @endif
                @if($downloadUrl)
                    <div class="small mt-1">Use <strong>Open / Download</strong> above to access the file.</div>
                @endif
            </div>
        @endif
    @endif
</div>
@endsection