<?php

declare(strict_types=1);

namespace App\Services\VirtualMachine;

use App\Models\ModuleVmware;
use App\Models\OrderItem;
use App\Models\Setting;

/**
 * Builds the email payload for VPS credential emails — shared by the
 * initial provisioning send (SendVmCredentialsEmailJob) and the admin
 * "resend" action (ResendVmCredentialsEmailJob).
 */
class VmCredentialsEmailDataBuilder
{
    public function build(ModuleVmware $vm, ?OrderItem $orderItem): array
    {
        $setting      = Setting::where('key', 'setting')->first();
        $settingValue = $setting ? json_decode((string) $setting->value) : null;

        $months      = (int) ($orderItem?->months ?? 0);
        $osGroupName = $vm->os?->osGroup?->name ?? '';
        $isWindows   = str_contains(strtolower($osGroupName), 'windows');
        $osUsername  = $isWindows ? 'Administrator' : 'root';

        return $this->safeUtf8([
            'company_name'     => $settingValue->company ?? 'Thế Giới Số',
            'company_logo'     => $settingValue->logo    ?? '',
            'client_name'      => $vm->customer->fullname ?? '',
            'product_name'     => $orderItem?->getProductAttribute()?->name ?? 'Cloud VPS',
            'product_billing'  => $this->billingLabel($months),
            'product_price'    => $orderItem ? number_format((float) $orderItem->price, 0, ',', '.') : 'N/A',
            'service_host'     => $vm->ip ?? 'N/A',
            'service_username' => $osUsername,
            'service_port'     => (string) ($vm->port ?? '22'),
            'service_password' => $vm->plain_password ?? '(xem tai khoan quan ly)',
            'os_name'          => $vm->os ? ($osGroupName . ' ' . $vm->os->version) : 'Unknown OS',
            'service_due_exp'  => $vm->next_due_date
                ? date('d/m/Y', (int) $vm->next_due_date)
                : 'N/A',
        ]);
    }

    private function billingLabel(?int $months): string
    {
        return match ($months) {
            1       => 'Hang thang',
            3       => '3 Thang',
            6       => '6 Thang',
            12      => 'Hang nam',
            24      => '2 Nam',
            default => ($months ?? 0) . ' Thang',
        };
    }

    /**
     * Sanitize tất cả string trong array thành UTF-8 hợp lệ.
     * Loại bỏ ký tự binary/invalid trước khi đẩy vào queue (tránh JSON encode lỗi).
     */
    private function safeUtf8(array $data): array
    {
        return array_map(function ($value) {
            if (!is_string($value)) return $value;

            if (mb_check_encoding($value, 'UTF-8')) return $value;

            $converted = mb_convert_encoding($value, 'UTF-8', mb_detect_encoding($value, ['UTF-8', 'ISO-8859-1', 'Windows-1252'], true) ?: 'ISO-8859-1');

            return mb_check_encoding($converted, 'UTF-8')
                ? $converted
                : preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]|[^\x09\x0A\x0D\x20-\x{10FFFF}]/u', '', $value);
        }, $data);
    }
}