@extends('layouts.app')

@section('title', 'Edit Invoice')
@section('page-title', 'Edit Invoice 🧾')
@section('page-subtitle', $invoice->invoice_number)

@section('content')
<div class="max-w-3xl mx-auto">
    <div class="cat-card p-4 lg:p-8" x-data="invoiceEditForm()">
        <form action="{{ route('invoices.update', $invoice) }}" method="POST">
            @csrf @method('PUT')

            {{-- Header fields --}}
            <div class="grid grid-cols-1 sm:grid-cols-2 gap-3 mb-5">
                <div class="sm:col-span-2">
                    <label class="block text-sm font-semibold text-gray-700 mb-1">Invoice Title</label>
                    <input type="text" name="title" value="{{ old('title', $invoice->title) }}" class="input-soft" required>
                </div>
                <div>
                    <label class="block text-sm font-semibold text-gray-700 mb-1">Client</label>
                    <select name="client_id" class="input-soft">
                        <option value="">— No client —</option>
                        @foreach($clients as $client)
                            <option value="{{ $client->id }}" {{ old('client_id', $invoice->client_id) == $client->id ? 'selected' : '' }}>{{ $client->name }}</option>
                        @endforeach
                    </select>
                </div>
                <div>
                    <label class="block text-sm font-semibold text-gray-700 mb-1">Status</label>
                    <select name="status" class="input-soft">
                        @foreach($statuses as $s)
                            <option value="{{ $s->value }}" {{ old('status', $invoice->status->value) === $s->value ? 'selected' : '' }}>{{ $s->label() }}</option>
                        @endforeach
                    </select>
                </div>
                <div>
                    <label class="block text-sm font-semibold text-gray-700 mb-1">Issue Date</label>
                    <input type="date" name="issue_date" value="{{ old('issue_date', $invoice->issue_date->toDateString()) }}" class="input-soft">
                </div>
                <div>
                    <label class="block text-sm font-semibold text-gray-700 mb-1">Due Date</label>
                    <input type="date" name="due_date" value="{{ old('due_date', $invoice->due_date->toDateString()) }}" class="input-soft">
                </div>
                <div>
                    <label class="block text-sm font-semibold text-gray-700 mb-1">Paid Date</label>
                    <input type="date" name="paid_date" value="{{ old('paid_date', $invoice->paid_date?->toDateString()) }}" class="input-soft">
                </div>
                <div>
                    <label class="block text-sm font-semibold text-gray-700 mb-1">Tax Rate (%)</label>
                    <input type="number" name="tax_rate" x-model="taxRate" @input="recalc()"
                           value="{{ old('tax_rate', $invoice->tax_rate) }}" class="input-soft" step="0.01">
                </div>
            </div>

            {{-- Line Items --}}
            <div class="mb-5">
                <div class="flex items-center justify-between mb-3">
                    <h3 class="text-sm font-bold text-gray-700">Line Items</h3>
                    <button type="button" @click="addItem()" class="btn-sakura text-xs py-1.5 px-4">＋ Add Item</button>
                </div>

                <div class="space-y-2">
                    <template x-for="(item, index) in items" :key="index">
                        <div class="bg-pink-50 rounded-2xl p-3">
                            <input type="text" :name="`items[${index}][description]`"
                                   x-model="item.description"
                                   class="input-soft text-sm mb-2 bg-white"
                                   placeholder="Service description" required>
                            <div class="flex gap-2 items-center">
                                <div class="w-16 shrink-0">
                                    <label class="text-xs text-gray-400 block mb-0.5">Qty</label>
                                    <input type="number" :name="`items[${index}][quantity]`"
                                           x-model.number="item.quantity" @input="recalc()"
                                           class="input-soft text-sm text-center bg-white px-2" min="1">
                                </div>
                                <div class="flex-1">
                                    <label class="text-xs text-gray-400 block mb-0.5">Unit Price</label>
                                    <input type="number" :name="`items[${index}][unit_price]`"
                                           x-model.number="item.unit_price" @input="recalc()"
                                           class="input-soft text-sm bg-white" min="0" step="1000">
                                </div>
                                <div class="w-24 shrink-0 text-right">
                                    <label class="text-xs text-gray-400 block mb-0.5">Total</label>
                                    <div class="text-sm font-bold text-gray-700 pt-2">
                                        Rp <span x-text="formatNum(item.quantity * item.unit_price)"></span>
                                    </div>
                                </div>
                                <button type="button" @click="removeItem(index)"
                                        class="text-red-400 hover:text-red-600 text-lg shrink-0 pt-4">✕</button>
                            </div>
                        </div>
                    </template>
                </div>
            </div>

            {{-- Totals --}}
            <div class="bg-pink-50 rounded-2xl p-4 mb-5">
                <div class="flex justify-between text-sm py-1">
                    <span class="text-gray-500">Subtotal</span>
                    <span class="font-semibold">Rp <span x-text="formatNum(subtotal)"></span></span>
                </div>
                <div class="flex justify-between text-sm py-1">
                    <span class="text-gray-500">Tax (<span x-text="taxRate"></span>%)</span>
                    <span class="font-semibold">Rp <span x-text="formatNum(taxAmount)"></span></span>
                </div>
                <div class="flex justify-between text-base font-bold py-2 mt-1 border-t border-pink-200">
                    <span class="text-gray-700">Total</span>
                    <span class="text-pink-600">Rp <span x-text="formatNum(total)"></span></span>
                </div>
            </div>

            {{-- Bank Info --}}
            <div class="grid grid-cols-1 sm:grid-cols-3 gap-3 mb-5">
                <div>
                    <label class="block text-xs font-semibold text-gray-600 mb-1">Bank Name</label>
                    <input type="text" name="bank_name" value="{{ old('bank_name', $invoice->bank_name) }}"
                           class="input-soft text-sm">
                </div>
                <div>
                    <label class="block text-xs font-semibold text-gray-600 mb-1">Account Number</label>
                    <input type="text" name="bank_account" value="{{ old('bank_account', $invoice->bank_account) }}"
                           class="input-soft text-sm">
                </div>
                <div>
                    <label class="block text-xs font-semibold text-gray-600 mb-1">Account Holder</label>
                    <input type="text" name="bank_holder" value="{{ old('bank_holder', $invoice->bank_holder) }}"
                           class="input-soft text-sm">
                </div>
            </div>

            <div class="mb-5">
                <label class="block text-sm font-semibold text-gray-700 mb-1">Notes</label>
                <textarea name="notes" rows="2" class="input-soft resize-none">{{ old('notes', $invoice->notes) }}</textarea>
            </div>

            <div class="flex flex-col sm:flex-row gap-3">
                <button type="submit" class="btn-sakura flex-1 py-3">💾 Save Changes</button>
                <a href="{{ route('invoices.show', $invoice) }}"
                   class="flex-1 py-3 text-center rounded-full border border-pink-200 text-gray-600 hover:bg-pink-50 font-semibold text-sm">
                    Cancel
                </a>
            </div>
        </form>
    </div>
</div>

@push('scripts')
<script>
function invoiceEditForm() {
    return {
        items: @json($invoice->items->map(fn($i) => ['description' => $i->description, 'quantity' => $i->quantity, 'unit_price' => (float)$i->unit_price])),
        taxRate: {{ $invoice->tax_rate }},
        get subtotal() { return this.items.reduce((s, i) => s + (i.quantity * i.unit_price), 0); },
        get taxAmount() { return Math.round(this.subtotal * this.taxRate / 100); },
        get total()    { return this.subtotal + this.taxAmount; },
        addItem()      { this.items.push({ description: '', quantity: 1, unit_price: 0 }); },
        removeItem(i)  { if (this.items.length > 1) this.items.splice(i, 1); },
        recalc()       {},
        formatNum(n)   { return Number(n).toLocaleString('id-ID'); },
    };
}
</script>
@endpush
@endsection