<?php

namespace App\Services;

use RuntimeException;

class ResendEmailService
{
    private string $endpoint = 'https://api.resend.com/emails';

    public function send(array $payload): array
    {
        $apiKey = config('services.resend.key');

        if (! $apiKey) {
            throw new RuntimeException('RESEND_API_KEY belum diatur.');
        }

        $body = json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);

        if ($body === false) {
            throw new RuntimeException('Gagal menyiapkan payload email untuk Resend.');
        }

        $ch = curl_init($this->endpoint);

        if ($ch === false) {
            throw new RuntimeException('Gagal inisialisasi cURL.');
        }

        curl_setopt_array($ch, [
            CURLOPT_POST => true,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_HTTPHEADER => [
                'Authorization: Bearer '.$apiKey,
                'Content-Type: application/json',
            ],
            CURLOPT_POSTFIELDS => $body,
            CURLOPT_CONNECTTIMEOUT => 10,
            CURLOPT_TIMEOUT => 30,
        ]);

        $response = curl_exec($ch);
        $statusCode = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);

        if ($response === false) {
            $error = curl_error($ch);
            curl_close($ch);

            throw new RuntimeException('Resend request gagal: '.$error);
        }

        curl_close($ch);

        $decoded = json_decode($response, true);

        if ($statusCode < 200 || $statusCode >= 300) {
            $message = is_array($decoded) && isset($decoded['message'])
                ? $decoded['message']
                : $response;

            throw new RuntimeException('Resend API error: '.$message);
        }

        return is_array($decoded) ? $decoded : ['raw' => $response];
    }
}