@extends('layouts.admin')

@section('title', 'Confirmar pedido')

@section('content')
@php
    $fmt = static function ($n, int $maxDec = 4): string {
        $n = (float) $n;
        if (abs($n - round($n)) < 0.00005) {
            return number_format(round($n), 0);
        }

        return rtrim(rtrim(number_format($n, $maxDec, '.', ''), '0'), '.') ?: '0';
    };
@endphp

<h1 class="h3 mb-2">Confirmar {{ $order->number }}</h1>
<div class="alert alert-warning">
    Revise los lotes. Al confirmar se bloqueará y validará nuevamente el stock disponible.
    @if($order->items->contains(fn ($i) => $i->enteredAsPacks()))
        <div class="small mt-1 mb-0">Las cantidades se muestran en <strong>cajas/empaque</strong> cuando el pedido se vendió así; el inventario se reserva en unidades internas.</div>
    @endif
</div>

<form method="POST" action="{{ route('orders.confirm', $order) }}" id="confirmOrderForm">
    @csrf

    @foreach($order->items as $item)
        @php
            $asPacks = $item->enteredAsPacks();
            $perPack = max(1, (int) ($item->units_per_pack ?: 1));
            $packName = $item->pack_name ?: ($item->product?->packLabel() ?: 'caja');
            $unitName = $item->product?->unitLabel() ?: 'und';
            $salePrice = $asPacks
                ? (float) ($item->price_entered ?? bcmul((string) $item->unit_sale_price, (string) $perPack, 4))
                : (float) $item->unit_sale_price;
            $priceSuffix = $asPacks ? '/ '.$packName : '/ '.$unitName;
        @endphp

        <div class="card p-3 mb-3" data-entry-mode="{{ $asPacks ? 'packs' : 'base' }}" data-per-pack="{{ $perPack }}">
            <h2 class="h5 mb-1">{{ $item->product->name }}</h2>
            <p class="text-secondary small mb-3">
                Pedido: <strong>{{ $item->quantityLabel() }}</strong>
                · ${{ number_format($salePrice, 4) }} {{ $priceSuffix }}
                @if($asPacks)
                    <span class="text-muted">({{ $fmt($item->quantity) }} {{ $unitName }} internas)</span>
                @endif
            </p>

            <div class="table-responsive">
                <table class="table align-middle mb-0">
                    <thead>
                        <tr>
                            <th>Lote</th>
                            <th>Disponible</th>
                            <th>Costo {{ $asPacks ? $packName : $unitName }}</th>
                            <th>Precio ref.</th>
                            <th>Asignar ({{ $asPacks ? $packName : $unitName }})</th>
                            <th>Margen</th>
                        </tr>
                    </thead>
                    <tbody>
                        @foreach($suggestions[$item->id] as $i => $row)
                            @php
                                $availBase = (float) $row['available'];
                                $qtyBase = (float) $row['quantity'];
                                $unitCost = (float) $row['unit_cost'];
                                $refUnit = (float) $row['reference_sale_price'];

                                if ($asPacks) {
                                    $availShow = $availBase / $perPack;
                                    $qtyShow = $qtyBase / $perPack;
                                    $costShow = $unitCost * $perPack;
                                    $refShow = $refUnit * $perPack;
                                    $margin = $salePrice - $costShow;
                                    $maxShow = $availShow;
                                } else {
                                    $availShow = $availBase;
                                    $qtyShow = $qtyBase;
                                    $costShow = $unitCost;
                                    $refShow = $refUnit;
                                    $margin = (float) $item->unit_sale_price - $unitCost;
                                    $maxShow = $availBase;
                                }
                            @endphp
                            <tr>
                                <td>
                                    {{ $row['code'] }}
                                    <input type="hidden" name="allocations[{{ $item->id }}][{{ $i }}][batch_id]" value="{{ $row['batch_id'] }}">
                                </td>
                                <td>
                                    <strong>{{ $fmt($availShow) }}</strong>
                                    <span class="text-secondary">{{ $asPacks ? $packName.($availShow == 1 ? '' : 's') : $unitName }}</span>
                                    @if($asPacks)
                                        <div class="small text-muted">{{ $fmt($availBase) }} {{ $unitName }}</div>
                                    @endif
                                </td>
                                <td>${{ number_format($costShow, 4) }}</td>
                                <td>${{ number_format($refShow, 4) }}</td>
                                <td style="min-width:9rem">
                                    <input
                                        class="form-control allocation-qty"
                                        type="number"
                                        step="{{ $asPacks ? '0.0001' : '0.0001' }}"
                                        min="0"
                                        max="{{ $maxShow }}"
                                        name="allocations[{{ $item->id }}][{{ $i }}][quantity]"
                                        value="{{ $fmt($qtyShow) }}"
                                        data-per-pack="{{ $asPacks ? $perPack : 1 }}"
                                        data-mode="{{ $asPacks ? 'packs' : 'base' }}"
                                        required
                                    >
                                    @if($asPacks)
                                        <div class="form-text">Se reservará en {{ $unitName }}</div>
                                    @endif
                                </td>
                                <td class="{{ $margin < 0 ? 'text-danger fw-bold' : 'text-success' }}">
                                    ${{ number_format($margin, 4) }}
                                    <div class="small text-muted">por {{ $asPacks ? $packName : $unitName }}</div>
                                </td>
                            </tr>
                        @endforeach
                    </tbody>
                </table>
            </div>
        </div>
    @endforeach

    @if($errors->any())
        <div class="alert alert-danger">{{ $errors->first() }}</div>
    @endif

    @if($order->wants_invoice && $billingEnabled && $canAutoInvoice)
        @if($billingIssuers->isEmpty())
            <div class="alert alert-warning">
                Este pedido está marcado para facturar, pero no hay emisores configurados.
                <a href="{{ route('billing.settings') }}">Configure un emisor</a> antes de confirmar.
            </div>
        @else
            @php
                $selectedBillingIssuerId = old(
                    'billing_issuer_id',
                    $order->billing_issuer_id
                        ?? $billingIssuers->firstWhere('is_default', true)?->id
                        ?? $billingIssuers->first()?->id
                );
            @endphp
            <div class="card mb-3 border-primary">
                <div class="card-body">
                    <h2 class="h6 mb-3"><i class="bi bi-receipt"></i> Facturación al confirmar</h2>
                    <p class="small text-secondary mb-3">
                        Se emitirá la factura electrónica con el emisor seleccionado. Cada RUC usa su propio certificado y secuencial.
                    </p>
                    <label class="form-label fw-semibold" for="billing_issuer_id">Emisor</label>
                    <select class="form-select" name="billing_issuer_id" id="billing_issuer_id" required style="max-width: 32rem;">
                        @foreach($billingIssuers as $issuer)
                            <option value="{{ $issuer->id }}" @selected((int) $selectedBillingIssuerId === $issuer->id)>
                                {{ $issuer->displayLabel() }} · {{ $issuer->formattedSeries() }}
                                @if($issuer->is_default) (predeterminado) @endif
                            </option>
                        @endforeach
                    </select>
                </div>
            </div>
        @endif
    @elseif($order->wants_invoice && $billingEnabled && ! $canAutoInvoice)
        <div class="alert alert-info mb-3">
            Este pedido solicita factura. Tras confirmar, un usuario con permiso de emisión podrá facturarlo manualmente.
        </div>
    @endif

    <button class="btn btn-success" type="submit">Confirmar y reservar inventario</button>
    <a class="btn btn-outline-secondary" href="{{ route('orders.index') }}">Volver</a>
</form>
@endsection

@push('scripts')
<script>
(() => {
    const form = document.getElementById('confirmOrderForm');
    if (!form) return;

    form.addEventListener('submit', () => {
        form.querySelectorAll('.allocation-qty').forEach((input) => {
            const mode = input.dataset.mode || 'base';
            const per = Math.max(1, parseInt(input.dataset.perPack || '1', 10) || 1);
            if (mode !== 'packs' || per <= 1) return;
            const packs = parseFloat(input.value) || 0;
            input.value = (packs * per).toFixed(4);
        });
    });
})();
</script>
@endpush