@php
    $payment = $payment ?? null;
    $preset = $preset ?? ['invoice_id' => null, 'customer_id' => null];
    $selectedInvoice = old('invoice_id', $payment?->invoice_id ?? $preset['invoice_id']);
@endphp

<div class="row g-3">
    <div class="col-12"><div class="form-section-title"><i class="fa-solid fa-money-bill-wave"></i>بيانات الدفعة</div></div>

    <div class="col-md-6">
        <label class="form-label">الفاتورة</label>
        <select name="invoice_id" id="invoiceSelect" class="form-select select2" data-placeholder="اختر الفاتورة">
            <option value="">— دفعة عامة بدون فاتورة —</option>
            @foreach ($invoices as $inv)
                <option value="{{ $inv->id }}"
                        data-customer="{{ $inv->customer_id }}"
                        data-remaining="{{ $inv->remaining }}"
                        @selected((int) $selectedInvoice === $inv->id)>
                    {{ $inv->code }} — {{ $inv->customer?->display_name }} (متبقي {{ currency($inv->remaining) }})
                </option>
            @endforeach
            @if ($payment?->invoice && ! $invoices->contains('id', $payment->invoice_id))
                <option value="{{ $payment->invoice_id }}" selected>{{ $payment->invoice->code }} — {{ $payment->invoice->customer?->display_name }}</option>
            @endif
        </select>
        <div class="form-text" id="remainingHint"></div>
    </div>

    <div class="col-md-6">
        <label class="form-label">العميل <span class="req">*</span></label>
        <select name="customer_id" id="customerSelect" class="form-select select2" data-placeholder="اختر العميل" required>
            <option value="">— اختر العميل —</option>
            @foreach ($customers as $c)
                <option value="{{ $c->id }}" @selected((int) old('customer_id', $payment?->customer_id ?? $preset['customer_id']) === $c->id)>
                    {{ $c->display_name }} — {{ $c->phone }}
                </option>
            @endforeach
        </select>
    </div>

    <div class="col-md-3">
        <label class="form-label">تاريخ الدفعة <span class="req">*</span></label>
        <input type="date" name="date" value="{{ old('date', $payment?->date?->format('Y-m-d') ?? today()->toDateString()) }}" class="form-control" required>
    </div>

    <div class="col-md-3">
        <label class="form-label">المبلغ <span class="req">*</span></label>
        <div class="input-group">
            <input type="number" step="0.01" min="0.01" name="amount" id="amountInput"
                   value="{{ old('amount', $payment?->amount) }}" class="form-control" required>
            <span class="input-group-text">{{ setting('currency', 'ر.س') }}</span>
        </div>
    </div>

    <div class="col-md-3">
        <label class="form-label">طريقة الدفع <span class="req">*</span></label>
        <select name="method" class="form-select" required>
            @foreach ($methods as $k => $v)
                <option value="{{ $k }}" @selected(old('method', $payment?->method ?? 'cash') === $k)>{{ $v }}</option>
            @endforeach
        </select>
    </div>

    <div class="col-md-3">
        <label class="form-label">رقم المرجع</label>
        <input type="text" name="reference" value="{{ old('reference', $payment?->reference) }}" class="form-control" placeholder="رقم الحوالة / الشيك">
    </div>

    <div class="col-12">
        <label class="form-label">ملاحظات</label>
        <textarea name="notes" class="form-control" rows="2">{{ old('notes', $payment?->notes) }}</textarea>
    </div>
</div>

<div class="d-flex gap-2 mt-4">
    <button type="submit" class="btn btn-primary"><i class="fa-solid fa-floppy-disk ms-2"></i>حفظ</button>
    <a href="{{ route('payments.index') }}" class="btn btn-light">إلغاء</a>
</div>

@push('scripts')
<script>
$(function () {
    function syncInvoice() {
        const opt = $('#invoiceSelect').find('option:selected');
        const customer = opt.data('customer');
        const remaining = opt.data('remaining');

        if (customer) {
            $('#customerSelect').val(customer).trigger('change.select2');
        }
        if (remaining !== undefined) {
            $('#remainingHint').html('المتبقي على الفاتورة: <strong>' + fmt(remaining) + ' {{ setting('currency', 'ر.س') }}</strong>');
            if (!$('#amountInput').val()) $('#amountInput').val(remaining);
        } else {
            $('#remainingHint').text('');
        }
    }

    $('#invoiceSelect').on('change', syncInvoice);
    syncInvoice();
});
</script>
@endpush