<?php

namespace App\Services\Order;

use App\Enums\Invoice\InvoiceStatus;
use App\Enums\Order\OrderStatus;
use App\Helpers\OrderHelper;
use App\Models\DomainPricing;
use App\Models\Invoice;
use App\Models\InvoiceItem;
use App\Models\Order;
use App\Models\OrderItem;
use App\Models\Product;
use App\Models\Service;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\DB;

class ServiceOrderRecorder
{
    /**
     * @return array{order: Order, orderItem: OrderItem, invoice: Invoice}
     */
    public function create(
        int $customerId,
        ?Product $product,
        string $billingCycle,
        int $price,
        ?string $serverName,
        bool $paid,
        ?string $paymentMethod = null,
        ?string $clientIp = null,
    ): array {
        $months = OrderHelper::cycleToMonths($billingCycle);
        $isDomain = $product?->product_type === 'domain';

        $order = Order::create([
            'order_num' => OrderHelper::generateOrderNumber(),
            'customer_id' => $customerId,
            'user_id' => Auth::guard('admin')->id(),
            'date' => now()->toDateString(),
            'sub_total' => $price,
            'discount_amount' => 0,
            'total' => $price,
            'status' => $paid ? OrderStatus::ACTIVE->value : OrderStatus::PENDING->value,
            'payment_method' => $paymentMethod,
            'client_ip' => $clientIp,
        ]);

        $orderItem = OrderItem::create([
            'order_id' => $order->id,
            'product_id' => $product?->id,
            'billing_cycle' => $billingCycle,
            'months' => $months,
            'server_name' => $serverName,
            'domain_name' => $isDomain ? $serverName : null,
            'quantity' => 1,
            'price' => $price,
        ]);

        $invoice = Invoice::create([
            'invoice_number' => OrderHelper::generateOrderNumber('INV'),
            'customer_id' => $customerId,
            'order_id' => $order->id,
            'invoice_type' => 1,
            'date' => now()->toDateString(),
            'sub_total' => $price,
            'discount_amount' => 0,
            'tax' => 0,
            'total' => $price,
            'status' => $paid ? InvoiceStatus::PAID->value : InvoiceStatus::UNPAID->value,
            'payment_method' => $paymentMethod,
            'paid_at' => $paid ? now() : null,
            'due_date' => $paid ? now()->addMonths($months)->toDateString() : now()->toDateString(),
        ]);

        InvoiceItem::create([
            'invoice_id' => $invoice->id,
            'product_id' => $product?->id,
            'type' => 'service',
            'description' => $this->describe($product, $serverName),
            'months' => $months,
            'quantity' => 1,
            'unit_price' => $price,
            'total_price' => $price,
        ]);

        return compact('order', 'orderItem', 'invoice');
    }

    public function ensureForService(Service $service, ?int $price = null, ?string $billingCycle = null): void
    {
        if ($service->order_item_id || ! $service->customer_id) {
            return;
        }

        DB::transaction(function () use ($service, $price, $billingCycle) {
            $product = $service->product ?? $this->defaultProductFor($service->type);
            $isDomain = ($product?->product_type ?? $service->type) === 'domain';
            $billingCycle ??= $isDomain ? 'annually' : 'monthly';
            $price ??= $this->listPrice($product, $billingCycle, $service->server_name) ?? 0;

            $records = $this->create(
                (int) $service->customer_id,
                $product,
                $billingCycle,
                $price,
                $service->server_name,
                paid: false,
            );

            $service->forceFill([
                'product_id' => $service->product_id ?? $product?->id,
                'order_item_id' => $records['orderItem']->id,
                'invoice_id' => $records['invoice']->id,
            ])->save();
        });
    }

    public function syncUnpaidInvoice(Service $service, int $price): void
    {
        $invoice = $service->invoice;
        if (! $invoice || (int) $invoice->status !== InvoiceStatus::UNPAID->value || (int) $invoice->invoice_type !== 1) {
            return;
        }

        $months = (int) ($service->orderItem?->months ?: 1);

        $invoice->update(['sub_total' => $price, 'total' => $price]);
        $invoice->invoiceItems()->where('type', 'service')->update([
            'months' => $months,
            'unit_price' => $price,
            'total_price' => $price,
        ]);
        $invoice->order?->update(['sub_total' => $price, 'total' => $price]);
    }

    public function cancelUnpaidInvoice(Service $service): void
    {
        $invoice = $service->invoice;
        if (! $invoice || (int) $invoice->status !== InvoiceStatus::UNPAID->value) {
            return;
        }

        $invoice->update(['status' => InvoiceStatus::CANCELLED->value]);
        $invoice->order?->update(['status' => OrderStatus::CANCELLED->value]);
    }

    public function discardOrder(?int $orderItemId): void
    {
        $order = $orderItemId ? OrderItem::find($orderItemId)?->order : null;
        if (! $order) {
            return;
        }

        if (Service::whereIn('order_item_id', $order->orderItems()->pluck('id'))->exists()) {
            return;
        }

        $order->invoices()->delete();
        $order->delete();
    }

    public function listPrice(?Product $product, string $billingCycle, ?string $serverName): ?int
    {
        if ($product?->product_type === 'domain') {
            return DomainPricing::matchDomain((string) $serverName)
                ?->orderPrice(DomainPricing::yearsForMonths(OrderHelper::cycleToMonths($billingCycle)));
        }

        $price = $product?->pricings()->where('billing_cycle', $billingCycle)->value('price');

        return $price === null ? null : (int) $price;
    }

    private function defaultProductFor(?string $type): ?Product
    {
        return $type
            ? Product::where('product_type', $type)->where('is_active', true)->orderBy('id')->first()
            : null;
    }

    private function describe(?Product $product, ?string $serverName): string
    {
        $name = $product->name ?? 'Dịch vụ';

        return $serverName ? "{$name} - {$serverName}" : $name;
    }
}