<?php

namespace App\Services\Sms;

use App\Models\SmsLog;
use App\Models\SmsProfile;
use App\Models\SmsSender;
use App\Models\SmsTemplate;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;

class SmsService
{
    public function __construct(
        protected SmsClient $client,
    ) {}

    /**
     * Send a raw text message.
     */
    public function sendRaw(SmsProfile $profile, string $to, string $content, ?SmsSender $sender = null, ?string $countryCode = null, bool $deliveryReport = false, ?string $clientReference = null): SmsLog
    {
        return DB::transaction(function () use ($profile, $to, $content, $sender, $countryCode, $deliveryReport, $clientReference): SmsLog {
            $log = new SmsLog([
                'uuid' => (string) Str::uuid(),
                'profile_id' => $profile->id,
                'to_number' => /*$to*/'',
                'sender' => $sender?->sname,
                'message' => $content,
                'status' => 'queued',
                'queued_at' => now(),
            ]);
            $log->save();

            $result = $this->client->send($profile, new SmsMessage(
                to: $to,
                content: $content,
                sender: $sender?->sname,
                senderPhone: /*$sender?->phone_number*/'',
                countryCode: $countryCode,
                deliveryReport: $deliveryReport,
                clientReference: $clientReference,
            ));

            if ($result->status === 'sent') {
                $log->status = 'sent';
                $log->sent_at = now();
            } else {
                $log->status = 'failed';
                $log->failed_at = now();
            }
            $log->provider_message_id = $result->providerMessageId;
            $log->cost = $result->cost;
            $log->currency = $result->currency;
            $log->meta = $result->meta;
            $log->save();

            return $log;
        });
    }

    /**
     * Render an SMS from template and send.
     */
    public function sendFromTemplate(SmsTemplate $template, string $to, array $variables = [], ?SmsProfile $profile = null, ?SmsSender $sender = null, ?string $countryCode = null, bool $deliveryReport = false, ?string $clientReference = null): SmsLog
    {
        $profile = $profile ?: $template->defaultProfile;
        if (! $profile) {
            throw new \InvalidArgumentException('SMS profile is required to send a message.');
        }

        $sender = $sender ?: $template->defaultSender;
        $content = $this->renderContent($template->content, $variables);

        $log = $this->sendRaw($profile, $to, $content, $sender, $countryCode, $deliveryReport, $clientReference);
        $log->template_id = $template->id;
        $log->save();

        return $log;
    }

    protected function renderContent(string $content, array $vars): string
    {
        // Simple token replacement: {token}
        return preg_replace_callback('/\{([a-zA-Z0-9_\.]+)\}/', function ($m) use ($vars) {
            $key = $m[1];

            return array_key_exists($key, $vars) ? (string) $vars[$key] : $m[0];
        }, $content);
    }

    /**
     * Get current credit balance from provider.
     */
    public function getCreditBalance(SmsProfile $profile): string
    {
        return $this->client->getCreditBalance($profile);
    }

    /**
     * Get price quote(s) from provider.
     * Returns array of strings as provided by the API.
     */
    public function getPriceQuotes(SmsProfile $profile): array
    {
        return $this->client->getPriceQuotes($profile);
    }
}