@extends('layouts.vending')

@section('title', 'Produkt bearbeiten')

@section('content')
<div class="max-w-4xl mx-auto px-4">
    <div class="mb-8">
        <div class="flex items-center space-x-4 mb-4">
            <a href="{{ route('products.index') }}" class="text-blue-600 hover:text-blue-800">
                ← Zurück zur Übersicht
            </a>
        </div>
        <h1 class="text-3xl font-bold text-gray-900">Produkt bearbeiten</h1>
        <p class="text-gray-600 mt-2">{{ $product->name }} - LMIV-konforme Produktdaten</p>
    </div>

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

        <!-- Grundinformationen -->
        <div class="bg-white shadow rounded-lg p-6">
            <h2 class="text-xl font-semibold text-gray-900 mb-6 border-b border-gray-200 pb-2">
                Grundinformationen
            </h2>
            
            <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
                <div>
                    <label for="name" class="block text-sm font-medium text-gray-700 mb-2">
                        Produktname *
                    </label>
                    <input type="text" id="name" name="name" value="{{ old('name', $product->name) }}" required
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('name') border-red-500 @enderror">
                    @error('name')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="price" class="block text-sm font-medium text-gray-700 mb-2">
                        Preis (€) *
                    </label>
                    <input type="number" id="price" name="price" value="{{ old('price', $product->price) }}" step="0.01" min="0" required
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('price') border-red-500 @enderror">
                    @error('price')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div class="md:col-span-2">
                    <label for="description" class="block text-sm font-medium text-gray-700 mb-2">
                        Beschreibung
                    </label>
                    <textarea id="description" name="description" rows="3"
                              class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('description') border-red-500 @enderror">{{ old('description', $product->description) }}</textarea>
                    @error('description')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="image" class="block text-sm font-medium text-gray-700 mb-2">
                        Produktbild
                    </label>
                    @if($product->image)
                        <div class="mb-2">
                            <img src="{{ asset('storage/' . $product->image) }}" alt="{{ $product->name }}" class="h-20 w-20 object-cover rounded">
                            <p class="text-xs text-gray-500 mt-1">Aktuelles Bild (wird ersetzt wenn neues hochgeladen)</p>
                        </div>
                    @endif
                    <input type="file" id="image" name="image" accept="image/jpeg,image/jpg,image/png,image/gif,image/webp"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('image') border-red-500 @enderror">
                    <p class="text-xs text-gray-500 mt-1">Erlaubte Formate: JPEG, PNG, GIF, WebP (max. 2MB)</p>
                    @error('image')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="barcode" class="block text-sm font-medium text-gray-700 mb-2">
                        Barcode
                    </label>
                    <input type="text" id="barcode" name="barcode" value="{{ old('barcode', $product->barcode) }}"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('barcode') border-red-500 @enderror">
                    @error('barcode')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>
            </div>
        </div>

        <!-- LMIV-Pflichtangaben -->
        <div class="bg-white shadow rounded-lg p-6">
            <h2 class="text-xl font-semibold text-gray-900 mb-6 border-b border-gray-200 pb-2">
                LMIV-Pflichtangaben
            </h2>
            
            <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
                <div class="md:col-span-2">
                    <label for="ingredients" class="block text-sm font-medium text-gray-700 mb-2">
                        Zutaten (in absteigender Reihenfolge)
                    </label>
                    <textarea id="ingredients" name="ingredients" rows="3"
                              class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('ingredients') border-red-500 @enderror">{{ old('ingredients', $product->ingredients) }}</textarea>
                    @error('ingredients')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div class="md:col-span-2">
                    <label for="allergens" class="block text-sm font-medium text-gray-700 mb-2">
                        Allergene und Unverträglichkeiten
                    </label>
                    <textarea id="allergens" name="allergens" rows="3"
                              placeholder="z.B. Enthält Gluten, Milch, Nüsse..."
                              class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('allergens') border-red-500 @enderror">{{ old('allergens', $product->allergens) }}</textarea>
                    @error('allergens')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="net_weight" class="block text-sm font-medium text-gray-700 mb-2">
                        Nettofüllmenge (g)
                    </label>
                    <input type="number" id="net_weight" name="net_weight" value="{{ old('net_weight', $product->net_weight) }}" step="0.1"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('net_weight') border-red-500 @enderror">
                    @error('net_weight')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="origin_country" class="block text-sm font-medium text-gray-700 mb-2">
                        Herkunftsland
                    </label>
                    <input type="text" id="origin_country" name="origin_country" value="{{ old('origin_country', $product->origin_country) }}"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('origin_country') border-red-500 @enderror">
                    @error('origin_country')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="manufacturer" class="block text-sm font-medium text-gray-700 mb-2">
                        Hersteller
                    </label>
                    <input type="text" id="manufacturer" name="manufacturer" value="{{ old('manufacturer', $product->manufacturer) }}"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('manufacturer') border-red-500 @enderror">
                    @error('manufacturer')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="distributor" class="block text-sm font-medium text-gray-700 mb-2">
                        Vertreiber
                    </label>
                    <input type="text" id="distributor" name="distributor" value="{{ old('distributor', $product->distributor) }}"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('distributor') border-red-500 @enderror">
                    @error('distributor')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>
            </div>
        </div>

        <!-- Nährwertangaben -->
        <div class="bg-white shadow rounded-lg p-6">
            <h2 class="text-xl font-semibold text-gray-900 mb-6 border-b border-gray-200 pb-2">
                Nährwertangaben (pro 100g)
            </h2>
            
            <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6">
                <!-- Erste Reihe -->
                <div>
                    <label for="energy_kcal" class="block text-sm font-medium text-gray-700 mb-2 h-10 flex items-center">
                        Energie (kcal)
                    </label>
                    <input type="number" id="energy_kcal" name="energy_kcal" value="{{ old('energy_kcal', $product->energy_kcal) }}" step="0.1"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('energy_kcal') border-red-500 @enderror">
                    @error('energy_kcal')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="energy_kj" class="block text-sm font-medium text-gray-700 mb-2 h-10 flex items-center">
                        Energie (kJ)
                    </label>
                    <input type="number" id="energy_kj" name="energy_kj" value="{{ old('energy_kj', $product->energy_kj) }}" step="0.1"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('energy_kj') border-red-500 @enderror">
                    @error('energy_kj')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="fat" class="block text-sm font-medium text-gray-700 mb-2 h-10 flex items-center">
                        Fett (g)
                    </label>
                    <input type="number" id="fat" name="fat" value="{{ old('fat', $product->fat) }}" step="0.01"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('fat') border-red-500 @enderror">
                    @error('fat')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="saturated_fat" class="block text-sm font-medium text-gray-700 mb-2 h-10 flex items-center">
                        davon gesättigte Fettsäuren (g)
                    </label>
                    <input type="number" id="saturated_fat" name="saturated_fat" value="{{ old('saturated_fat', $product->saturated_fat) }}" step="0.01"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('saturated_fat') border-red-500 @enderror">
                    @error('saturated_fat')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <!-- Zweite Reihe -->
                <div>
                    <label for="carbohydrates" class="block text-sm font-medium text-gray-700 mb-2 h-10 flex items-center">
                        Kohlenhydrate (g)
                    </label>
                    <input type="number" id="carbohydrates" name="carbohydrates" value="{{ old('carbohydrates', $product->carbohydrates) }}" step="0.01"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('carbohydrates') border-red-500 @enderror">
                    @error('carbohydrates')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="sugars" class="block text-sm font-medium text-gray-700 mb-2 h-10 flex items-center">
                        davon Zucker (g)
                    </label>
                    <input type="number" id="sugars" name="sugars" value="{{ old('sugars', $product->sugars) }}" step="0.01"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('sugars') border-red-500 @enderror">
                    @error('sugars')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="protein" class="block text-sm font-medium text-gray-700 mb-2 h-10 flex items-center">
                        Eiweiß (g)
                    </label>
                    <input type="number" id="protein" name="protein" value="{{ old('protein', $product->protein) }}" step="0.01"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('protein') border-red-500 @enderror">
                    @error('protein')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="salt" class="block text-sm font-medium text-gray-700 mb-2 h-10 flex items-center">
                        Salz (g)
                    </label>
                    <input type="number" id="salt" name="salt" value="{{ old('salt', $product->salt) }}" step="0.01" min="0"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('salt') border-red-500 @enderror">
                    @error('salt')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>
            </div>
        </div>

        <!-- Zusätzliche Informationen -->
        <div class="bg-white shadow rounded-lg p-6">
            <h2 class="text-xl font-semibold text-gray-900 mb-6 border-b border-gray-200 pb-2">
                Zusätzliche Informationen
            </h2>
            
            <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
                <div>
                    <label for="storage_instructions" class="block text-sm font-medium text-gray-700 mb-2">
                        Aufbewahrungshinweise
                    </label>
                    <textarea id="storage_instructions" name="storage_instructions" rows="3"
                              placeholder="z.B. Kühl und trocken lagern..."
                              class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('storage_instructions') border-red-500 @enderror">{{ old('storage_instructions', $product->storage_instructions) }}</textarea>
                    @error('storage_instructions')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="usage_instructions" class="block text-sm font-medium text-gray-700 mb-2">
                        Verwendungshinweise
                    </label>
                    <textarea id="usage_instructions" name="usage_instructions" rows="3"
                              placeholder="z.B. Vor Verzehr gut schütteln..."
                              class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('usage_instructions') border-red-500 @enderror">{{ old('usage_instructions', $product->usage_instructions) }}</textarea>
                    @error('usage_instructions')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="best_before_date" class="block text-sm font-medium text-gray-700 mb-2">
                        Mindesthaltbarkeitsdatum
                    </label>
                    <input type="date" id="best_before_date" name="best_before_date" value="{{ old('best_before_date', $product->best_before_date?->format('Y-m-d')) }}"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('best_before_date') border-red-500 @enderror">
                    @error('best_before_date')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>

                <div>
                    <label for="lot_number" class="block text-sm font-medium text-gray-700 mb-2">
                        Chargennummer
                    </label>
                    <input type="text" id="lot_number" name="lot_number" value="{{ old('lot_number', $product->lot_number) }}"
                           class="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 @error('lot_number') border-red-500 @enderror">
                    @error('lot_number')
                        <p class="mt-1 text-sm text-red-600">{{ $message }}</p>
                    @enderror
                </div>
            </div>
        </div>

        <!-- Aktionsbuttons -->
        <div class="flex justify-between items-center bg-gray-50 px-6 py-4 rounded-lg">
            <a href="{{ route('products.index') }}" 
               class="inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50">
                Abbrechen
            </a>
            
            <div class="flex space-x-3">
                <a href="{{ route('products.show', $product) }}" 
                   class="inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50">
                    Vorschau
                </a>
                <button type="submit" 
                        class="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
                    Änderungen speichern
                </button>
            </div>
        </div>
    </form>
</div>

<script>
// Automatische kJ-Berechnung basierend auf kcal
document.getElementById('energy_kcal').addEventListener('input', function() {
    const kcal = parseFloat(this.value);
    if (!isNaN(kcal)) {
        document.getElementById('energy_kj').value = Math.round(kcal * 4.184);
    }
});
</script>
@endsection