<?php

namespace App\Services\Domain;

use App\Models\DnsDomain;
use App\Models\Service;
use App\Services\Order\ServiceOrderRecorder;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\DB;

class CustomerDomainServiceSync
{
    public const AUTO_CREATED_NOTE = 'Tự động tạo từ phân công DNS domain';

    public function __construct(private readonly ServiceOrderRecorder $orderRecorder) {}

    public function syncCustomers(DnsDomain $domain, array $customerIds, ?string $previousDomainName = null): void
    {
        $customerIds = collect($customerIds)->map(fn ($id) => (int) $id)->unique()->values();
        $previousCustomerIds = $domain->customer()->pluck('customers.id');
        $oldName = $previousDomainName ?? $domain->domain_name;

        DB::transaction(function () use ($domain, $customerIds, $previousCustomerIds, $oldName): void {
            $domain->customer()->sync($customerIds->all());

            foreach ($customerIds as $customerId) {
                $service = $this->findService($customerId, $oldName, $domain->domain_name);

                if ($service?->trashed()) {
                    $service->restore();
                }

                $service ??= new Service([
                    'customer_id' => $customerId,
                    'type' => 'domain',
                    'note' => self::AUTO_CREATED_NOTE,
                ]);

                $service->fill([
                    'server_name' => $domain->domain_name,
                    'status' => $this->serviceStatus($domain),
                    'started_at' => $service->started_at ?? $domain->created_at ?? Carbon::now(),
                ])->save();

                if ($service->status !== 'cancelled') {
                    $this->orderRecorder->ensureForService($service);
                }
            }

            $removedCustomerIds = $previousCustomerIds->diff($customerIds);
            if ($removedCustomerIds->isNotEmpty()) {
                Service::query()
                    ->whereIn('customer_id', $removedCustomerIds)
                    ->where('type', 'domain')
                    ->whereIn(DB::raw('LOWER(TRIM(server_name))'), array_unique([
                        $this->domainKey($oldName),
                        $this->domainKey($domain->domain_name),
                    ]))
                    ->get()
                    ->each(function (Service $service): void {
                        $this->orderRecorder->cancelUnpaidInvoice($service);
                        $service->delete();
                    });
            }
        });
    }

    public function updateCustomerDomain(
        DnsDomain $domain,
        int $customerId,
        ?string $expiresAt,
    ): Service {
        $this->syncCustomers($domain, $domain->customer()->pluck('customers.id')->all());

        $service = $this->findService($customerId, $domain->domain_name, $domain->domain_name);
        abort_if(! $service, 404, 'Không tìm thấy dịch vụ tên miền');

        $service->fill([
            'status' => $this->serviceStatus($domain),
            'started_at' => $domain->created_at,
            'expires_at' => $expiresAt
                ? Carbon::parse($expiresAt)->setTimeFrom($service->expires_at ?? Carbon::today())
                : null,
        ])->save();

        return $service;
    }

    private function findService(int $customerId, string $oldName, string $currentName): ?Service
    {
        return Service::withTrashed()
            ->where('customer_id', $customerId)
            ->where('type', 'domain')
            ->whereIn(DB::raw('LOWER(TRIM(server_name))'), array_unique([
                $this->domainKey($oldName),
                $this->domainKey($currentName),
            ]))
            ->orderBy('id')
            ->first();
    }

    private function serviceStatus(DnsDomain $domain): string
    {
        return match ((int) $domain->is_created) {
            DnsDomain::STATUS_CREATED => 'active',
            DnsDomain::STATUS_INACTIVE => 'suspended',
            DnsDomain::STATUS_CANCELLED => 'cancelled',
            default => 'pending',
        };
    }

    private function domainKey(?string $domainName): string
    {
        return mb_strtolower(trim((string) $domainName));
    }
}