@extends('layouts.admin')
@section('title', 'Edit Item')
@section('subtitle', 'Modify metadata and settings for this submission')

@section('content')
<div class="max-w-4xl">
    <div class="mb-6 flex items-center justify-between">
        <a href="{{ route('admin.items.index') }}" class="flex items-center gap-2 text-xs font-bold text-slate-400 hover:text-primary uppercase tracking-widest transition-colors">
            <span class="material-icons text-sm">arrow_back</span> Back to Items
        </a>
        <div class="flex items-center gap-4">
            @php $primaryBitstream = $item->bitstreams->where('bundle', 'ORIGINAL')->first() ?? $item->bitstreams->first(); @endphp
            @if($primaryBitstream)
                <a href="{{ route('bitstreams.download', $primaryBitstream->id) }}" target="_blank" class="flex items-center gap-1.5 px-3 py-1.5 bg-emerald-50 hover:bg-emerald-500 text-emerald-700 hover:text-white rounded-xl text-xs font-bold uppercase tracking-wider transition-all shadow-sm">
                    <span class="material-icons text-sm">download</span> Download PDF / File
                </a>
            @endif
            <a href="{{ route('items.show', $item->uuid) }}" target="_blank" class="flex items-center gap-1.5 text-xs font-bold text-primary uppercase tracking-widest hover:underline">
                <span class="material-icons text-sm">open_in_new</span> View Public Page
            </a>
        </div>
    </div>

    <form action="{{ route('admin.items.update', $item) }}" method="POST" enctype="multipart/form-data" class="space-y-8">
        @csrf @method('PUT')

        <!-- Status & Settings -->
        <div class="bg-white rounded-3xl shadow-sm border border-slate-100 p-8">
            <h3 class="text-xs font-black uppercase tracking-widest text-slate-400 mb-6">Publication & Placement Settings</h3>
            <div class="grid md:grid-cols-2 lg:grid-cols-4 gap-6">
                <div>
                    <label class="block text-[10px] font-black uppercase tracking-widest text-slate-400 mb-2">Status</label>
                    <select name="status" class="w-full border border-slate-200 rounded-xl px-4 py-3 text-sm focus:ring-2 focus:ring-primary focus:border-primary">
                        <option value="published" {{ $item->status === 'published' ? 'selected' : '' }}>Published</option>
                        <option value="draft" {{ $item->status === 'draft' ? 'selected' : '' }}>Draft</option>
                        <option value="withdrawn" {{ $item->status === 'withdrawn' ? 'selected' : '' }}>Withdrawn</option>
                    </select>
                </div>
                <div>
                    <label class="block text-[10px] font-black uppercase tracking-widest text-slate-400 mb-2">Community / Faculty</label>
                    <select id="community_select" class="w-full border border-slate-200 rounded-xl px-4 py-3 text-sm focus:ring-2 focus:ring-primary focus:border-primary">
                        <option value="">-- Select Community --</option>
                        @foreach($communities as $comm)
                            <option value="{{ $comm->id }}" {{ optional($item->collection)->community_id == $comm->id ? 'selected' : '' }}>
                                {{ $comm->name }}
                            </option>
                        @endforeach
                    </select>
                </div>
                <div>
                    <label class="block text-[10px] font-black uppercase tracking-widest text-slate-400 mb-2">Collection / Programme <span class="text-red-500">*</span></label>
                    <select name="collection_id" id="collection_select" required class="w-full border border-slate-200 rounded-xl px-4 py-3 text-sm focus:ring-2 focus:ring-primary focus:border-primary">
                        <option value="">-- Select Collection --</option>
                        @foreach($collections as $col)
                            <option value="{{ $col->id }}" data-community-id="{{ $col->community_id }}" {{ $item->collection_id == $col->id ? 'selected' : '' }}>
                                {{ $col->name }}
                            </option>
                        @endforeach
                    </select>
                </div>
                <div>
                    <label class="block text-[10px] font-black uppercase tracking-widest text-slate-400 mb-2">Issue Date</label>
                    <input type="date" name="issued_at" value="{{ optional($item->issued_at)->format('Y-m-d') }}" class="w-full border border-slate-200 rounded-xl px-4 py-3 text-sm focus:ring-2 focus:ring-primary focus:border-primary">
                </div>
            </div>
        </div>

        <!-- Metadata Fields -->
        <div class="bg-white rounded-3xl shadow-sm border border-slate-100 p-8">
            <h3 class="text-xs font-black uppercase tracking-widest text-slate-400 mb-6">Dublin Core Metadata</h3>
            <div class="space-y-6">
                @foreach($fields as $field)
                    @php
                        $fieldName = 'dc.' . $field->element . ($field->qualifier !== 'none' ? '.' . $field->qualifier : '');
                        $existingValue = $item->metadata->where('metadata_field_id', $field->id)->first()?->text_value;

                        // Default auto-population for dc.publisher
                        if ($field->element === 'publisher' && empty($existingValue)) {
                            $existingValue = 'Mountain Top University';
                        }
                    @endphp
                    <div>
                        <label class="block text-[10px] font-black uppercase tracking-widest text-slate-400 mb-2 flex items-center justify-between">
                            <span class="font-mono text-primary font-bold">
                                {{ $fieldName }}
                                @if($field->element === 'title') <span class="text-red-500 font-bold">*</span> @endif
                            </span>
                            @if($field->element === 'title')
                                <span class="text-[10px] text-slate-400 font-medium normal-case">(Max 255 characters)</span>
                            @elseif($field->element === 'date')
                                <span class="text-[10px] text-primary font-bold normal-case">Format: YYYY-MM-DD</span>
                            @endif
                        </label>

                        @if(in_array($field->element, ['description']))
                            <textarea name="metadata[{{ $field->id }}]" rows="4"
                                class="w-full border @error('metadata.'.$field->id) border-red-500 focus:ring-red-500 focus:border-red-500 @else border-slate-200 focus:ring-primary focus:border-primary @enderror rounded-xl px-4 py-3 text-sm resize-none"
                                placeholder="Enter abstract or description...">{{ old('metadata.'.$field->id, $existingValue) }}</textarea>
                        @elseif($field->element === 'date')
                            @php
                                $dateVal = $existingValue;
                                if (!empty($dateVal) && preg_match('/^(\d{1,2})\/(\d{1,2})\/(\d{4})$/', $dateVal, $m)) {
                                    $dateVal = "{$m[3]}-" . str_pad($m[2], 2, '0', STR_PAD_LEFT) . "-" . str_pad($m[1], 2, '0', STR_PAD_LEFT);
                                }
                            @endphp
                            <input type="date" name="metadata[{{ $field->id }}]" 
                                value="{{ old('metadata.'.$field->id, $dateVal ?: now()->format('Y-m-d')) }}"
                                placeholder="YYYY-MM-DD"
                                class="w-full border @error('metadata.'.$field->id) border-red-500 focus:ring-red-500 focus:border-red-500 @else border-slate-200 focus:ring-primary focus:border-primary @enderror rounded-xl px-4 py-3 text-sm font-mono">
                        @else
                            <input name="metadata[{{ $field->id }}]" value="{{ old('metadata.'.$field->id, $existingValue) }}"
                                @if($field->element === 'title') maxlength="255" @endif
                                placeholder="{{ $field->scope_note ?: 'Enter ' . $fieldName }}"
                                class="w-full border @error('metadata.'.$field->id) border-red-500 focus:ring-red-500 focus:border-red-500 @else border-slate-200 focus:ring-primary focus:border-primary @enderror rounded-xl px-4 py-3 text-sm">
                        @endif

                        <p class="text-[10px] text-slate-400 mt-1 font-medium">{{ $field->scope_note }}</p>

                        @error('metadata.'.$field->id)
                            <p class="text-xs text-red-500 font-bold mt-1.5 flex items-center gap-1">
                                <span class="material-icons text-sm">error_outline</span> {{ $message }}
                            </p>
                        @enderror
                    </div>
                @endforeach
            </div>
        </div>

        <!-- Files (Bitstreams) -->
        <div class="bg-white rounded-3xl shadow-sm border border-slate-100 p-8">
            <h3 class="text-xs font-black uppercase tracking-widest text-slate-400 mb-6">Files (Bitstreams)</h3>
            @if($item->bitstreams->count() > 0)
                <div class="mb-6 divide-y divide-slate-100">
                    @foreach($item->bitstreams as $bs)
                        <div class="py-3 flex items-center justify-between">
                            <div class="flex items-center gap-3">
                                <a href="{{ route('bitstreams.download', $bs->id) }}" target="_blank" class="w-9 h-9 bg-primary/10 hover:bg-primary text-primary hover:text-white rounded-xl flex items-center justify-center transition-colors" title="Download / View File">
                                    <span class="material-icons text-base">file_download</span>
                                </a>
                                <div>
                                    <a href="{{ route('bitstreams.download', $bs->id) }}" target="_blank" class="text-sm font-bold text-slate-800 hover:text-primary transition-colors line-clamp-1">
                                        {{ $bs->file_name }}
                                    </a>
                                    <div class="flex items-center gap-2 text-[10px] text-slate-400 font-medium">
                                        <span>Size: {{ number_format($bs->file_size / 1024, 2) }} KB</span>
                                        <span>•</span>
                                        <span>MIME: {{ $bs->mime_type }}</span>
                                        <span>•</span>
                                        <span class="inline-flex items-center gap-0.5 text-blue-600 font-bold font-mono bg-blue-50 px-1.5 py-0.2 rounded">
                                            <span class="material-icons text-[10px]">file_download</span> {{ number_format($bs->downloads) }} downloads
                                        </span>
                                    </div>
                                </div>
                            </div>
                            <div class="flex items-center gap-2">
                                <a href="{{ route('bitstreams.download', $bs->id) }}" target="_blank" class="px-2.5 py-1.5 rounded-xl bg-slate-50 hover:bg-emerald-500 text-slate-500 hover:text-white text-xs font-bold transition-all flex items-center gap-1">
                                    <span class="material-icons text-xs">download</span> View / Download ({{ number_format($bs->downloads) }})
                                </a>
                                @if(auth()->user()->role === 'admin')
                                    <button type="button" onclick="confirmDeleteFile({{ $bs->id }})" class="p-2 rounded-xl bg-red-50 hover:bg-red-500 text-red-400 hover:text-white transition-all" title="Delete File">
                                        <span class="material-icons text-sm">delete_outline</span>
                                    </button>
                                @endif
                            </div>
                        </div>
                    @endforeach
                </div>
            @else
                <p class="text-xs text-slate-400 font-bold mb-6">No files currently attached.</p>
            @endif

            <div class="space-y-4">
                <div>
                    <label class="block text-[10px] font-black uppercase tracking-widest text-slate-400 mb-2">Upload New Files</label>
                    <input type="file" name="files[]" multiple class="w-full border border-slate-200 rounded-xl px-4 py-3 text-sm focus:ring-2 focus:ring-primary focus:border-primary">
                    <p class="text-[10px] text-slate-400 mt-1 font-medium">You can select multiple files to upload.</p>
                </div>
            </div>
        </div>

        <!-- UUID (read-only) -->
        <div class="bg-slate-50 rounded-2xl p-5 flex items-center gap-4">
            <span class="material-icons text-slate-300">link</span>
            <div>
                <p class="text-[10px] font-black uppercase tracking-widest text-slate-400">Persistent Identifier (UUID)</p>
                <code class="text-xs text-slate-600 font-mono">{{ $item->uuid }}</code>
            </div>
        </div>

        <div class="flex items-center gap-4">
            <button type="submit" class="px-10 py-4 bg-primary text-white font-black rounded-2xl text-xs uppercase tracking-widest shadow-lg shadow-primary/30 hover:scale-[1.02] active:scale-[0.98] transition-all">
                Save Changes
            </button>
            <a href="{{ route('admin.items.index') }}" class="px-8 py-4 bg-slate-100 text-slate-600 font-bold rounded-2xl text-xs uppercase tracking-widest hover:bg-slate-200 transition-all">
                Cancel
            </a>
        </div>
    </form>
</div>

<form id="delete-file-form" action="" method="POST" class="hidden">
    @csrf
    @method('DELETE')
</form>

<script>
function confirmDeleteFile(id) {
    if (confirm('Are you sure you want to delete this file?')) {
        const form = document.getElementById('delete-file-form');
        form.action = `/admin/bitstreams/${id}`;
        form.submit();
    }
}

document.addEventListener('DOMContentLoaded', function () {
    const communitySelect = document.getElementById('community_select');
    const collectionSelect = document.getElementById('collection_select');
    
    if (communitySelect && collectionSelect) {
        const allOptions = Array.from(collectionSelect.querySelectorAll('option[data-community-id]'));

        function filterCollections() {
            const selectedCommunityId = communitySelect.value;
            const currentSelectedValue = collectionSelect.value;

            // Clear options except placeholder
            collectionSelect.innerHTML = '<option value="">-- Select Collection --</option>';

            let matchFound = false;
            allOptions.forEach(opt => {
                if (!selectedCommunityId || opt.dataset.communityId === selectedCommunityId) {
                    const clonedOpt = opt.cloneNode(true);
                    if (clonedOpt.value === currentSelectedValue) {
                        clonedOpt.selected = true;
                        matchFound = true;
                    }
                    collectionSelect.appendChild(clonedOpt);
                }
            });

            // If previously selected collection doesn't belong to new community, reset
            if (!matchFound && selectedCommunityId) {
                // Keep the placeholder selected
            }
        }

        communitySelect.addEventListener('change', function () {
            const previouslySelected = collectionSelect.value;
            filterCollections();
            // If the old selection is still available, keep it, otherwise choose placeholder
            if (!Array.from(collectionSelect.options).some(o => o.value === previouslySelected)) {
                collectionSelect.value = '';
            }
        });

        // Also if user selects a collection directly, sync community dropdown
        collectionSelect.addEventListener('change', function () {
            const selectedOption = collectionSelect.options[collectionSelect.selectedIndex];
            if (selectedOption && selectedOption.dataset.communityId) {
                communitySelect.value = selectedOption.dataset.communityId;
            }
        });

        // Initialize state on load
        if (communitySelect.value) {
            filterCollections();
        }
    }
});
</script>
</div>
@endsection