@extends('layouts.app')
@section('title', __('New Transfer'))

@section('content')
<div x-data="transferForm()" @product-picked="onProductPicked($event.detail)">
    <form method="POST" action="{{ route('transfers.store') }}">
        @csrf
        <template x-for="(item,i) in items" :key="i">
            <span>
                <input type="hidden" :name="`items[${i}][product_id]`" :value="item.product_id">
                <input type="hidden" :name="`items[${i}][batch_id]`" :value="item.batch_id">
                <input type="hidden" :name="`items[${i}][quantity]`" :value="item.quantity">
            </span>
        </template>

        <div class="mb-4 grid grid-cols-1 gap-4 sm:grid-cols-3">
            <div class="card">
                <label class="label">{{ __('From store') }}</label>
                <select name="from_store_id" x-model="fromStore" @change="loadBatches()" required class="input">
                    @foreach ($stores as $s)<option value="{{ $s->id }}" @selected($warehouse?->id===$s->id)>{{ $s->name }} ({{ $s->type }})</option>@endforeach
                </select>
            </div>
            <div class="card">
                <label class="label">{{ __('To store') }}</label>
                <select name="to_store_id" required class="input">
                    @foreach ($stores as $s)<option value="{{ $s->id }}" @selected($pos?->id===$s->id)>{{ $s->name }} ({{ $s->type }})</option>@endforeach
                </select>
            </div>
            <div class="card">
                <label class="label">{{ __('Notes') }}</label>
                <input type="text" name="notes" class="input">
            </div>
        </div>

        <div class="card mb-4">
            <div class="grid grid-cols-1 gap-3 sm:grid-cols-3">
                <div>
                    <x-product-select :label="__('Product')" :products="$products" />
                </div>
                <div>
                    <label class="label">{{ __('Batch (FEFO)') }}</label>
                    <select x-model="selectedBatch" class="input">
                        <option value="">{{ __('Select batch') }}</option>
                        <template x-for="b in batches" :key="b.id">
                            <option :value="b.id" x-text="b.batch_number + ' · ' + b.quantity + ' · ' + (b.expiration_date ? b.expiration_date.substring(0,10) : '')"></option>
                        </template>
                    </select>
                </div>
                <div class="flex items-end gap-2">
                    <div class="flex-1"><label class="label">{{ __('Quantity') }}</label><input type="number" min="1" x-model.number="qty" class="input"></div>
                    <button type="button" @click="addItem()" class="btn-primary"><x-icon name="plus" class="h-4 w-4"/></button>
                </div>
            </div>
        </div>

        <div class="table-wrap">
            <table class="min-w-full divide-y divide-slate-100">
                <thead class="bg-slate-50"><tr><th class="th">{{ __('Product') }}</th><th class="th">{{ __('Batch') }}</th><th class="th">{{ __('Quantity') }}</th><th class="th"></th></tr></thead>
                <tbody class="divide-y divide-slate-100">
                    <template x-for="(item,i) in items" :key="i">
                        <tr>
                            <td class="td" x-text="item.product_name"></td>
                            <td class="td font-mono text-xs" x-text="item.batch_number"></td>
                            <td class="td" x-text="item.quantity"></td>
                            <td class="td"><button type="button" @click="items.splice(i,1)" class="text-red-500"><x-icon name="trash" class="h-4 w-4"/></button></td>
                        </tr>
                    </template>
                    <tr x-show="!items.length"><td colspan="4" class="td py-8 text-center text-slate-400">{{ __('Add batches to transfer.') }}</td></tr>
                </tbody>
            </table>
        </div>

        <div class="mt-4 text-right">
            <button class="btn-primary" :disabled="!items.length">{{ __('Create transfer') }}</button>
        </div>
    </form>
</div>

@push('scripts')
<script>
function transferForm() {
    return {
        fromStore: '{{ $warehouse?->id }}',
        selectedProduct: '', selectedProductName: '',
        selectedBatch: '', qty: 1, batches: [], items: [],
        // The product dropdown lives in its own Alpine scope and reports back
        // through a bubbling event.
        onProductPicked(product) {
            this.selectedProduct = product.id;
            this.selectedProductName = product.name;
            this.selectedBatch = '';
            this.loadBatches();
        },
        async loadBatches() {
            if (!this.selectedProduct || !this.fromStore) { this.batches = []; return; }
            const r = await fetch(`{{ route('transfers.batches') }}?store_id=${this.fromStore}&product_id=${this.selectedProduct}`, { headers: { 'Accept': 'application/json' } });
            this.batches = await r.json();
        },
        addItem() {
            const b = this.batches.find(x => x.id == this.selectedBatch);
            if (!b || !this.selectedProduct) return;
            this.items.push({ product_id: this.selectedProduct, product_name: this.selectedProductName, batch_id: b.id, batch_number: b.batch_number, quantity: this.qty });
            this.selectedBatch = ''; this.qty = 1;
        }
    };
}
</script>
@endpush
@endsection