<?php

namespace App\Services\MailFlow;

use Illuminate\Support\Facades\Mail;

class ConventionalTransport
{
    public function send(array $payload): array
    {
        $config = config('mail');
        foreach (['host', 'port', 'username', 'password', 'encryption'] as $key) {
            $config[$key] = admin_setting('email_' . $key, $config[$key] ?? null);
        }
        $driver = $config['driver'] ?? 'smtp';
        $config['transport'] = $driver;
        $config['timeout'] = 8;
        if (($config['encryption'] ?? null) === 'ssl') {
            $config['scheme'] = 'smtps';
        }
        if (($config['encryption'] ?? null) === 'tls') {
            $config['require_tls'] = true;
        }
        $from = admin_setting('email_from_address', $config['from']['address']);
        $name = admin_setting('app_name', $config['from']['name']);
        // Build an isolated mailer: cached worker mailers never inherit another message's credentials.
        $sent = Mail::build($config)->html($payload['html'], function ($message) use ($payload, $from, $name) {
            $message->from($from, $name)->to($payload['to'])->subject($payload['subject']);
            if (!empty($payload['reply_to'])) {
                $message->replyTo($payload['reply_to']);
            }
            foreach ($payload['attachments'] ?? [] as $attachment) {
                $bytes = base64_decode($attachment['content'], true);
                if ($bytes === false) { throw new \RuntimeException('mail_attachment_invalid'); }
                $part = new \Symfony\Component\Mime\Part\DataPart($bytes, $attachment['filename'], $attachment['content_type'] ?? null);
                if (!empty($attachment['content_id'])) { $part->asInline()->setContentId($attachment['content_id']); }
                $message->getSymfonyMessage()->addPart($part);
            }
            foreach ($payload['headers'] ?? [] as $key => $value) {
                if (in_array(strtolower($key), ['in-reply-to', 'references'], true)) {
                    $message->getSymfonyMessage()->getHeaders()->addIdHeader($key, trim($value, '<>'));
                } else {
                    $message->getSymfonyMessage()->getHeaders()->addTextHeader($key, $value);
                }
            }
        });
        if (!$sent) {
            throw new \RuntimeException('mail_send_cancelled');
        }
        return [
            'status' => in_array($driver, ['log', 'array'], true) ? 'simulated' : 'submitted',
            'provider_id' => $sent->getMessageId(),
        ];
    }
}