<?php

namespace App\Http\Resources\Api\Service\Order;

use App\Enums\Invoice\InvoiceStatus;
use App\Enums\Order\OrderStatus;
use App\Models\InvoiceAttachment;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;
use Illuminate\Support\Carbon;

class InvoiceDetailResource extends JsonResource
{
    use ResolvesPaymentMethod;

    public function toArray(Request $request): array
    {
        return [
            'invoice_number' => $this->invoice_number,
            'invoice_type' => $this->invoice_type,
            'status' => $this->status,
            'status_text' => InvoiceStatus::tryFrom((int) $this->status)?->label() ?? '-',
            'sub_total' => (float) $this->sub_total,
            'discount_amount' => (float) ($this->discount_amount ?? 0),
            'coupon_code' => $this->coupon_code,
            'tax' => (float) $this->tax,
            'lookup_code' => $this->lookup_code,
            'vat_number' => $this->vat_number,
            'total' => (float) $this->total,
            // Công nợ: đã thu / còn thiếu. Dịch vụ chỉ kích hoạt khi outstanding = 0.
            'amount_paid' => (float) $this->amount_paid,
            'outstanding' => (float) \App\Services\InvoicePaymentService::outstanding($this->resource),
            'payment_method' => $this->resolvePaymentMethod($this->resource),
            'auto_renew' => (bool) $this->auto_renew,
            'created_at' => $this->created_at?->toISOString(),
            'due_date' => $this->due_date?->toISOString(),
            'billing_period_start' => $this->billing_period_start ? Carbon::parse($this->billing_period_start)->toDateString() : null,
            'billing_period_end' => $this->billing_period_end ? Carbon::parse($this->billing_period_end)->toDateString() : null,
            'next_renewal_date' => $this->whenLoaded('order', fn () => $this->nextRenewalDate()),
            'paid_at' => $this->paid_at?->toISOString(),
            'customer' => $this->whenLoaded('customer', fn () => [
                'name' => $this->customer->fullname,
                'email' => $this->customer->email,
                'address' => $this->customer->address,
            ]),
            'order' => $this->whenLoaded('order', fn () => [
                'order_num' => $this->order->order_num,
                'status' => (int) $this->order->status,
                'status_text' => OrderStatus::tryFrom((int) $this->order->status)?->label() ?? '-',
                'total' => (float) $this->order->total,
                'created_at' => $this->order->created_at?->toISOString(),
            ]),
            'items' => $this->whenLoaded('order', fn () => $this->isRenewal() ? $this->renewalItems() : $this->order->orderItems->map(fn ($item) => [
                'product_name' => $item->product?->name,
                'server_name' => $item->server_name,
                'billing_cycle' => $item->billing_cycle,
                'price' => (float) $item->price,
                'months' => $item->months,
                'os_id' => $item->os_id,
            ])->values()->all()),
            'service' => $this->whenLoaded('order', fn () => $this->resolveService()),
            'attachments' => $this->whenLoaded('attachments', fn () => $this->attachments
                ->whereNotIn('type', [InvoiceAttachment::TYPE_DEPLOYMENT, InvoiceAttachment::TYPE_CONTRACT])
                ->values()
                ->map(fn ($a) => [
                'filename' => $a->filename,
                'url' => $a->url,
                'mime_type' => $a->mime_type,
            ])->all()),
            'vmware' => $this->when(
                $this->order?->relationLoaded('vmWare') && $this->order->vmWare->isNotEmpty(),
                fn () => $this->resolveVmware($this->order->vmWare->first()),
            ),
        ];
    }

    private function isRenewal(): bool
    {
        return (int) $this->invoice_type === 2;
    }

    private function resolveOrderItem(): mixed
    {
        $items = $this->order->orderItems;
        $item = $this->service_id
            ? $items->first(fn ($i) => (int) $i->service?->id === (int) $this->service_id)
            : null;

        return $item ?? $items->first();
    }

    private function renewalMonths(): ?int
    {
        return $this->invoiceItems->firstWhere('type', 'renewal')?->months;
    }

    private function renewalItems(): array
    {
        $serverName = $this->resolveOrderItem()?->server_name;

        return $this->invoiceItems->map(fn ($item) => [
            'product_name' => $item->description,
            'server_name' => $serverName,
            'billing_cycle' => $item->months ? 'monthly' : null,
            'price' => (float) $item->total_price,
            'months' => $item->months,
            'os_id' => null,
        ])->values()->all();
    }

    private function nextRenewalDate(): ?string
    {
        if ($this->isRenewal() && $this->billing_period_end) {
            return Carbon::parse($this->billing_period_end)->toDateString();
        }

        return $this->resolveOrderItem()?->service?->expires_at?->toDateString();
    }

    private function resolveService(): ?array
    {
        $item = $this->resolveOrderItem();
        $renewalMonths = $this->isRenewal() ? $this->renewalMonths() : null;

        return $item ? [
            'product_id' => $item->product_id,
            'name' => $item->product?->name,
            'billing_cycle' => $renewalMonths ? 'monthly' : $item->billing_cycle,
            'months' => $renewalMonths ?: $item->months,
            'server_name' => $item->server_name,
            'product_type' => $item->product?->product_type,
        ] : null;
    }

    private function resolveVmware(\App\Models\ModuleVmware $vm): array
    {
        return [
            'id' => $vm->id,
            'uuid' => $vm->service?->uuid,
            'name' => $vm->name,
            'hostname' => $vm->hostname,
            'ip_address' => $vm->ip,
            'os_name' => $vm->os?->name,
            'status' => $vm->status,
            'username' => $vm->user,
            'port' => $vm->port,
            'power_state' => match ($vm->virtualMachine?->power_state) {
                'POWERED_ON' => 'poweredOn',
                'POWERED_OFF' => 'poweredOff',
                'SUSPENDED' => 'suspended',
                default => null,
            },
            'next_due_date' => $vm->next_due_date ? \Illuminate\Support\Carbon::createFromTimestamp($vm->next_due_date)->toISOString() : null,
        ];
    }
}