<?php

namespace addons\alisms\library;

/**
 * 阿里大于SMS短信发送
 */
class Alisms
{
    private $_params = [];
    public $error = '';
    protected $config = [];
    protected static $instance;

    public function __construct($options = [])
    {
        if ($config = get_addon_config('alisms')) {
            $this->config = array_merge($this->config, $config);
        }
        $this->config = array_merge($this->config, is_array($options) ? $options : []);
    }

    /**
     * 单例
     * @param array $options 参数
     * @return Alisms
     */
    public static function instance($options = [])
    {
        if (is_null(self::$instance)) {
            self::$instance = new static($options);
        }

        return self::$instance;
    }

    /**
     * 设置签名
     * @param string $sign
     * @return Alisms
     */
    public function sign($sign = '')
    {
        $this->_params['SignName'] = $sign;
        return $this;
    }

    /**
     * 设置参数
     * @param array $param
     * @return Alisms
     */
    public function param(array $param = [])
    {
        foreach ($param as $k => &$v) {
            $v = (string)$v;
        }
        unset($v);
        $this->_params['TemplateParam'] = json_encode($param);
        return $this;
    }

    /**
     * 设置模板
     * @param string $code 短信模板
     * @return Alisms
     */
    public function template($code = '')
    {
        $this->_params['TemplateCode'] = $code;
        return $this;
    }

    /**
     * 接收手机
     * @param string $mobile 手机号码
     * @return Alisms
     */
    public function mobile($mobile = '')
    {
        $this->_params['PhoneNumbers'] = $mobile;
        return $this;
    }

    /**
     * 立即发送
     * @return boolean
     */
    public function send()
    {
        $this->error = '';
        $params = $this->_params();
        $params['Signature'] = $this->_signed($params);
        $response = $this->_curl($params);
        if ($response !== false) {
            $res = (array)json_decode($response, true);
            if (isset($res['Code']) && $res['Code'] == 'OK') {
                return true;
            }
            $this->error = isset($res['Message']) ? $res['Message'] : 'InvalidResult';
        } else {
            $this->error = 'InvalidResult';
        }
        return false;
    }

    /**
     * 获取错误信息
     * @return string
     */
    public function getError()
    {
        return $this->error;
    }

    private function _params()
    {
        return array_merge([
            'AccessKeyId'      => $this->config['key'],
            'SignName'         => isset($this->config['sign']) ? $this->config['sign'] : '',
            'Action'           => 'SendSms',
            'Format'           => 'JSON',
            'Version'          => '2017-05-25',
            'SignatureVersion' => '1.0',
            'SignatureMethod'  => 'HMAC-SHA1',
            'SignatureNonce'   => uniqid(),
            'Timestamp'        => gmdate('Y-m-d\TH:i:s\Z'),
        ], $this->_params);
    }

    private function percentEncode($string)
    {
        $string = urlencode($string);
        $string = preg_replace('/\+/', '%20', $string);
        $string = preg_replace('/\*/', '%2A', $string);
        $string = preg_replace('/%7E/', '~', $string);
        return $string;
    }

    private function _signed($params)
    {
        $sign = $this->config['secret'];
        ksort($params);
        $canonicalizedQueryString = '';
        foreach ($params as $key => $value) {
            $canonicalizedQueryString .= '&' . $this->percentEncode($key) . '=' . $this->percentEncode($value);
        }
        $stringToSign = 'GET&%2F&' . $this->percentencode(substr($canonicalizedQueryString, 1));
        $signature = base64_encode(hash_hmac('sha1', $stringToSign, $sign . '&', true));
        return $signature;
    }

    private function _curl($params)
    {
        $uri = 'http://dysmsapi.aliyuncs.com/?' . http_build_query($params);
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_URL, $uri);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.98 Safari/537.36");
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $reponse = curl_exec($ch);
        curl_close($ch);
        return $reponse;
    }
}
