@section('title', 'Générer une facture')
<x-app-layout :assets="$assets ?? []">
    <div>
        {!! Form::open(['route' => 'invoices.store_generation', 'method' => 'post']) !!}
        <div class="row">
            <div class="col-xl-12 col-lg-8">
                <div class="card">
                    <div class="card-header d-flex justify-content-between">
                        <div class="header-title">
                            <h4 class="card-title">Générer une facture à partir de Bons de Livraison</h4>
                        </div>
                        <div class="card-action">
                            <a href="{{ route('invoices.index') }}" class="btn btn-sm btn-primary" role="button">Retour</a>
                        </div>
                    </div>
                    <div class="card-body">
                        <div class="row">
                            <div class="form-group col-md-6">
                                <label class="form-label" for="customer_id">Client : <span class="text-danger">*</span></label>
                                {{ Form::select('customer_id', $customers, null, [
                                    'class' => 'form-control', 
                                    'placeholder' => 'Sélectionner le client', 
                                    'id' => 'customer_id',
                                    'onchange' => 'loadDeliveryNotes(this.value)'
                                ]) }}
                            </div>
                        </div>

                        <div class="row mt-4">
                            <div class="col-md-12">
                                <h5>Bons de Livraison disponibles :</h5>
                                <div id="delivery_notes_container" class="mt-3">
                                    <p class="text-muted">Veuillez sélectionner un client pour voir les bons de livraison.</p>
                                </div>
                            </div>
                        </div>

                        <div class="mt-4">
                            <button type="submit" class="btn btn-primary" id="submitBtn" disabled>Générer la facture</button>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        {!! Form::close() !!}
    </div>

    <script>
        function loadDeliveryNotes(customerId) {
            const container = document.getElementById('delivery_notes_container');
            const submitBtn = document.getElementById('submitBtn');
            
            if (!customerId) {
                container.innerHTML = '<p class="text-muted">Veuillez sélectionner un client.</p>';
                submitBtn.disabled = true;
                return;
            }

            container.innerHTML = '<div class="spinner-border text-primary" role="status"></div> Chargement...';

            fetch(`{{ route('invoices.get_delivery_notes') }}?customer_id=${customerId}`)
                .then(response => response.json())
                .then(data => {
                    if (data.html) {
                        container.innerHTML = data.html;
                        
                        // Check if there are any available (not disabled) checkboxes
                        const availableCheckboxes = container.querySelectorAll('input[name="delivery_note_ids[]"]:not(:disabled)');
                        submitBtn.disabled = availableCheckboxes.length === 0;

                        // Event listener for selectAll
                        const selectAll = document.getElementById('selectAll');
                        if (selectAll) {
                            selectAll.addEventListener('change', function() {
                                availableCheckboxes.forEach(cb => cb.checked = this.checked);
                            });
                        }
                    } else {
                        container.innerHTML = '<p class="text-warning">Aucun bon de livraison disponible.</p>';
                        submitBtn.disabled = true;
                    }
                })
                .catch(err => {
                    console.error(err);
                    container.innerHTML = '<p class="text-danger">Erreur lors du chargement.</p>';
                });
        }

        // Optional: Re-disable submit button if nothing is checked
        document.addEventListener('change', function(e) {
            if (e.target.name === 'delivery_note_ids[]' || e.target.id === 'selectAll') {
                const submitBtn = document.getElementById('submitBtn');
                const checked = document.querySelectorAll('input[name="delivery_note_ids[]"]:checked');
                submitBtn.disabled = checked.length === 0;
            }
        });
    </script>
</x-app-layout>