@extends('layouts.app')

@section('title', 'Edit Supplier Invoice')

@section('content')
<div class="max-w-4xl mx-auto px-4 py-6">
    <div class="mb-6 flex justify-between items-center">
        <div>
            <h1 class="text-3xl font-bold text-gray-900">Edit Supplier Invoice</h1>
            <p class="text-gray-600">Updating Bill: <span class="font-mono text-orange-600 font-bold">{{ $supplierInvoice->supplier_invoice_number }}</span></p>
        </div>
        <a href="{{ route('supplier-invoices.index') }}" class="text-sm text-gray-500 hover:text-gray-700">
            <i class="fas fa-arrow-left mr-1"></i> Back to List
        </a>
    </div>

    <form action="{{ route('supplier-invoices.update', $supplierInvoice) }}" method="POST" enctype="multipart/form-data">
        @csrf
        @method('PUT')

        <div class="bg-white shadow rounded-lg p-6 space-y-6">
            <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
                <div>
                    <label class="block text-sm font-medium text-gray-700">Supplier *</label>
                    <select name="supplier_id" id="supplier_id" required class="mt-1 block w-full rounded-md border-gray-300 bg-gray-50 shadow-sm">
                        @foreach($suppliers as $supplier)
                            <option value="{{ $supplier->id }}" {{ $supplierInvoice->supplier_id == $supplier->id ? 'selected' : '' }}>
                                {{ $supplier->name }}
                            </option>
                        @endforeach
                    </select>
                    <p class="mt-1 text-xs text-gray-400">Note: Changing the supplier will filter the PO list below.</p>
                </div>

                <div>
                    <label class="block text-sm font-medium text-gray-700">Internal Company *</label>
                    <select name="company_id" required class="mt-1 block w-full rounded-md border-gray-300 shadow-sm">
                        @foreach($companies as $company)
                            <option value="{{ $company->id }}" {{ $supplierInvoice->company_id == $company->id ? 'selected' : '' }}>
                                {{ $company->name }}
                            </option>
                        @endforeach
                    </select>
                </div>
            </div>

            <div class="grid grid-cols-1 md:grid-cols-3 gap-6">
                <div>
                    <label class="block text-sm font-medium text-gray-700">Supplier Invoice # *</label>
                    <input type="text" name="supplier_invoice_number" value="{{ old('supplier_invoice_number', $supplierInvoice->supplier_invoice_number) }}" required
                           class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:ring-orange-500 focus:border-orange-500">
                </div>

                <div>
                    <label class="block text-sm font-medium text-gray-700">Invoice Date *</label>
                    <input type="date" name="invoice_date" value="{{ old('invoice_date', $supplierInvoice->invoice_date->format('Y-m-d')) }}" required
                           class="mt-1 block w-full rounded-md border-gray-300 shadow-sm">
                </div>

                <div>
                    <label class="block text-sm font-medium text-gray-700">Total Amount *</label>
                    <div class="mt-1 relative rounded-md shadow-sm">
                        <div class="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
                            <span class="text-gray-500 sm:text-sm">$</span>
                        </div>
                        <input type="number" name="total_amount" step="0.01" value="{{ old('total_amount', $supplierInvoice->total_amount) }}" required
                               class="pl-7 block w-full rounded-md border-gray-300">
                    </div>
                </div>
            </div>

            <hr class="border-gray-200">

            <div>
                <label class="block text-sm font-medium text-gray-700 mb-2">Linked Purchase Orders *</label>
                <div class="bg-gray-50 rounded-md p-4 border border-gray-200">
                    <div id="poList" class="grid grid-cols-1 md:grid-cols-2 gap-4">
                        @php
                            // Get IDs of POs already linked to this invoice
                            $currentPoIds = $supplierInvoice->purchaseOrders->pluck('id')->toArray();
                        @endphp

                        @foreach($purchaseOrders as $po)
                            <label class="po-item relative flex items-start p-3 bg-white border rounded-md cursor-pointer hover:border-orange-400
                                   {{ $supplierInvoice->supplier_id != $po->supplier_id ? 'hidden' : '' }}"
                                   data-supplier-id="{{ $po->supplier_id }}">
                                <div class="flex items-center h-5">
                                    <input type="checkbox" name="po_ids[]" value="{{ $po->id }}"
                                           {{ in_array($po->id, $currentPoIds) ? 'checked' : '' }}
                                           class="h-4 w-4 text-orange-600 border-gray-300 rounded">
                                </div>
                                <div class="ml-3 text-sm">
                                    <span class="font-bold text-gray-900">{{ $po->po_number }}</span>
                                    <span class="text-gray-500 block">Client Inv: {{ $po->clientInvoice->invoice_number ?? 'N/A' }}</span>
                                    <span class="text-orange-600 font-medium">${{ number_format($po->total_price, 2) }}</span>
                                </div>
                            </label>
                        @endforeach
                    </div>
                </div>
            </div>

            <div class="grid grid-cols-1 md:grid-cols-2 gap-6">
                <div>
                    <label class="block text-sm font-medium text-gray-700">Update Invoice PDF</label>
                    <input type="file" name="pdf_file" accept=".pdf"
                           class="mt-1 block w-full text-sm text-gray-500 file:mr-4 file:py-2 file:px-4 file:rounded-md file:border-0 file:text-sm file:font-semibold file:bg-gray-50 file:text-gray-700 hover:file:bg-gray-100">

                    @if($supplierInvoice->pdf_path)
                        <div class="mt-2 flex items-center text-xs text-orange-600">
                            <i class="fas fa-file-pdf mr-1"></i>
                            <a href="{{ asset('storage/' . $supplierInvoice->pdf_path) }}" target="_blank" class="underline">View Current PDF</a>
                        </div>
                    @endif
                </div>

                <div>
                    <label class="block text-sm font-medium text-gray-700">Payment Status *</label>
                    <select name="payment_status" required class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:ring-orange-500 focus:border-orange-500">
                        <option value="unpaid" {{ $supplierInvoice->payment_status == 'unpaid' ? 'selected' : '' }}>Unpaid</option>
                        <option value="partial" {{ $supplierInvoice->payment_status == 'partial' ? 'selected' : '' }}>Partial</option>
                        <option value="paid" {{ $supplierInvoice->payment_status == 'paid' ? 'selected' : '' }}>Paid</option>
                    </select>
                </div>
            </div>

            <div class="flex justify-between items-center pt-4 border-t">
                <p class="text-xs text-gray-400">Created: {{ $supplierInvoice->created_at->format('d/m/Y H:i') }}</p>
                <div class="flex space-x-3">
                    <a href="{{ route('supplier-invoices.index') }}" class="px-4 py-2 text-sm font-medium text-gray-700 bg-white border border-gray-300 rounded-md hover:bg-gray-50">Cancel</a>
                    <button type="submit" class="px-4 py-2 text-sm font-medium text-white bg-orange-600 border border-transparent rounded-md hover:bg-orange-700 shadow-sm">
                        Update Supplier Invoice
                    </button>
                </div>
            </div>
        </div>
    </form>
</div>

<script>
    // Re-use the filtering logic from the Create view
    document.getElementById('supplier_id').addEventListener('change', function() {
        const selectedSupplier = this.value;
        const poItems = document.querySelectorAll('.po-item');

        poItems.forEach(item => {
            if (item.getAttribute('data-supplier-id') === selectedSupplier) {
                item.classList.remove('hidden');
            } else {
                item.classList.add('hidden');
                item.querySelector('input').checked = false;
            }
        });
    });
</script>
@endsection