<?php

/*
 * This file is part of the overtrue/easy-sms.
 *
 * (c) overtrue <i@overtrue.me>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Overtrue\EasySms\Gateways;

use Overtrue\EasySms\Contracts\MessageInterface;
use Overtrue\EasySms\Contracts\PhoneNumberInterface;
use Overtrue\EasySms\Exceptions\GatewayErrorException;
use Overtrue\EasySms\Support\Config;
use Overtrue\EasySms\Traits\HasHttpRequest;

/**
 * Class QcloudGateway.
 *
 * @see https://cloud.tencent.com/document/api/382/55981
 */
class QcloudGateway extends Gateway
{
    use HasHttpRequest;

    const ENDPOINT_URL = 'https://sms.tencentcloudapi.com';

    const ENDPOINT_HOST = 'sms.tencentcloudapi.com';

    const ENDPOINT_SERVICE = 'sms';

    const ENDPOINT_METHOD = 'SendSms';

    const ENDPOINT_VERSION = '2021-01-11';

    const ENDPOINT_REGION = 'ap-guangzhou';

    const ENDPOINT_FORMAT = 'json';

    /**
     * @param \Overtrue\EasySms\Contracts\PhoneNumberInterface $to
     * @param \Overtrue\EasySms\Contracts\MessageInterface     $message
     * @param \Overtrue\EasySms\Support\Config                 $config
     *
     * @return array
     *
     * @throws \Overtrue\EasySms\Exceptions\GatewayErrorException ;
     */
    public function send(PhoneNumberInterface $to, MessageInterface $message, Config $config)
    {
        $data = $message->getData($this);

        $signName = !empty($data['sign_name']) ? $data['sign_name'] : $config->get('sign_name', '');

        unset($data['sign_name']);

        $phone = !\is_null($to->getIDDCode()) ? strval($to->getUniversalNumber()) : $to->getNumber();
        $params = [
            'PhoneNumberSet' => [
                $phone
            ],
            'SmsSdkAppId' => $this->config->get('sdk_app_id'),
            'SignName' => $signName,
            'TemplateId' => (string) $message->getTemplate($this),
            'TemplateParamSet' => array_map('strval', array_values($data)),
        ];

        $time = time();

        $result = $this->request('post', self::ENDPOINT_URL, [
            'headers' => [
                'Authorization' => $this->generateSign($params, $time),
                'Host' => self::ENDPOINT_HOST,
                'Content-Type' => 'application/json; charset=utf-8',
                'X-TC-Action' => self::ENDPOINT_METHOD,
                'X-TC-Region' => $this->config->get('region', self::ENDPOINT_REGION),
                'X-TC-Timestamp' => $time,
                'X-TC-Version' => self::ENDPOINT_VERSION,
            ],
            'json' => $params,
        ]);

        if (!empty($result['Response']['Error']['Code'])) {
            throw new GatewayErrorException($result['Response']['Error']['Message'], 400, $result);
        }

        if (!empty($result['Response']['SendStatusSet'])) {
            foreach ($result['Response']['SendStatusSet'] as $group) {
                if ($group['Code'] != 'Ok') {
                    throw new GatewayErrorException($group['Message'], 400, $result);
                }
            }
        }

        return $result;
    }

    /**
     * Generate Sign.
     *
     * @param array  $params
     *
     * @return string
     */
    protected function generateSign($params, $timestamp)
    {
        $date = gmdate("Y-m-d", $timestamp);
        $secretKey = $this->config->get('secret_key');
        $secretId = $this->config->get('secret_id');

        $canonicalRequest = 'POST'."\n".
            '/'."\n".
            '' ."\n".
            'content-type:application/json; charset=utf-8'."\n".
            'host:' . self::ENDPOINT_HOST."\n"."\n".
            'content-type;host'."\n".
            hash("SHA256", json_encode($params));

        $stringToSign =
            'TC3-HMAC-SHA256'."\n".
            $timestamp."\n".
            $date . '/'. self::ENDPOINT_SERVICE .'/tc3_request'."\n".
            hash("SHA256", $canonicalRequest);

        $secretDate = hash_hmac("SHA256", $date, "TC3".$secretKey, true);
        $secretService = hash_hmac("SHA256", self::ENDPOINT_SERVICE, $secretDate, true);
        $secretSigning = hash_hmac("SHA256", "tc3_request", $secretService, true);
        $signature = hash_hmac("SHA256", $stringToSign, $secretSigning);

        return 'TC3-HMAC-SHA256'
            ." Credential=". $secretId ."/". $date . '/'. self::ENDPOINT_SERVICE .'/tc3_request'
            .", SignedHeaders=content-type;host, Signature=".$signature;
    }
}