<?php namespace Dever\Helper;
use Dever;
class Curl
{
    private $handle;
    private $url;
    private $get_info = false;
    private $log = false;
    private $result_header = false;
    private $param = array();
    private $header = array();
    public function load($url, $param = false, $type = '', $json = false, $header = false, $agent = false, $proxy = false, $refer = false)
    {
        if ($type == 'get_info') {
            $this->get_info = true;
            $type = 'get';
        }
        $this->init();
        $this->param($param);
        $this->setRequest($type);
        if ($header) {
            $this->setHeader($header);
        }
        if (!$agent) {
            $agent = 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36';
        }
        if ($agent) {
            $this->setAgent($agent);
        }
        if ($proxy) {
            $this->setProxy($proxy);
        }
        if ($refer) {
            $this->setRefer($refer);
        }
        if ($json) {
            $this->setJson($param);
        } elseif ($type == 'file') {
            $this->setFormData($param);
        } elseif ($type == 'post' || $type == 'put') {
            $this->setForm($param);
        } elseif ($param) {
            if (strpos($url, '?')) {
                $url .= '&';
            } else {
                $url .= '?';
            }
            $url .= http_build_query($param);
        }
        if (strpos($url, '??')) {
            $url = str_replace('??', '?', $url);
        }
        $this->setUrl($url);
        return $this;
    }
    public function log($log)
    {
        $this->log = $log;
        return $this;
    }
    private function init()
    {
        if (!$this->handle) {
            $this->handle = curl_init();
        }
    }
    private function param(&$param)
    {
        if ($param && is_array($param) && isset($param[0])) {
            $temp = $param;
            $param = array();
            foreach ($temp as $k => $v) {
                if (is_array($v)) {
                    $param = array_merge($param, $v);
                } else {
                    $param[$k] = $v;
                }
            }
        }
    }
    public function setStream($callback)
    {
        curl_setopt($this->handle, CURLOPT_BUFFERSIZE, 16384);
        // 检查是否断联，每10秒发送一次心跳
        curl_setopt($this->handle,CURLOPT_TCP_KEEPALIVE,1);   // 开启
        curl_setopt($this->handle,CURLOPT_TCP_KEEPIDLE,10);   // 空闲10秒问一次
        curl_setopt($this->handle,CURLOPT_TCP_KEEPINTVL,10);  // 每10秒问一次
        curl_setopt($this->handle, CURLOPT_WRITEFUNCTION, function ($ch, $data) use ($callback) {
            call_user_func($callback, $data);            
            return strlen($data);
        });
        return $this;
    }
    public function setRequest($type)
    {
        if ($type == 'post' || $type == 'file') {
            curl_setopt($this->handle, CURLOPT_POST, true);
        } elseif ($type == 'put' || $type == 'delete') {
            curl_setopt($this->handle, CURLOPT_CUSTOMREQUEST, strtoupper($type));
        } else {
            curl_setopt($this->handle, CURLOPT_HTTPGET, true);
        }
    }
    public function setHeader($header)
    {
        if (is_array($header)) {
            foreach ($header as $k => $v) {
                if (is_string($k)) {
                    $this->header[] = $k . ':' . $v;
                } else {
                    $this->header[] = $v;
                }
            }
        } else {
            $this->header = explode("\n", $header);
        }
    }
    public function setAgent($agent)
    {
        curl_setopt($this->handle, CURLOPT_USERAGENT, $agent);
    }
    public function setProxy($proxy)
    {
        curl_setopt($this->handle, CURLOPT_PROXY, $proxy[0]); //代理服务器地址   
        curl_setopt($this->handle, CURLOPT_PROXYPORT, $proxy[1]); //代理服务器端口
        curl_setopt($this->handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);
    }
    public function setRefer($refer)
    {
        curl_setopt($this->handle, CURLOPT_REFERER, $refer);
    }
    public function setJson($param)
    {
        if (is_array($param)) {
            if (isset($param['item_desc'])) {
                $param = json_encode($param, JSON_UNESCAPED_UNICODE);
            } else {
                $param = json_encode($param);
            }
        }
        $header['Content-Type'] = 'application/json';
        $header['Content-Length'] = strlen($param);
        $this->setHeader($header);
        $this->setParam($param);
    }
    public function setFormData($param)
    {
        $header['Content-Type'] = 'multipart/form-data';
        if (!is_array($param)) {
            $param = Dever::json_decode($param);
        }
        $this->setHeader($header);
        $this->setParam($param);
    }
    public function setForm($param)
    {
        $header['Content-Type'] = 'application/x-www-form-urlencoded';
        if (!is_array($param)) {
            $array = Dever::json_decode($param);
            if (json_last_error() === JSON_ERROR_NONE) {
                $param = $array;
            }
        }
        if (is_array($param)) {
            $param = http_build_query($param);
        }
        $this->setHeader($header);
        $this->setParam($param);
    }
    public function setUrl($url)
    {
        $this->url = $url;
        curl_setopt($this->handle, CURLOPT_URL, $url);
        curl_setopt($this->handle, CURLOPT_RETURNTRANSFER, true);
    }
    public function result($setting = false)
    {
        try {
            if ($setting) {
                $this->setting($setting);
            }
            if ($this->header) {
                curl_setopt($this->handle, CURLOPT_HTTPHEADER, $this->header);
            }
            curl_setopt($this->handle, CURLOPT_HEADER, false);
            if ($this->result_header) {
                $this->result_header = array();
                curl_setopt($this->handle, CURLOPT_HEADERFUNCTION, array($this, 'headerHandler'));
            }
            if (Dever::shell('debug')) {
                curl_setopt($this->handle, CURLINFO_HEADER_OUT, true);
            }
            curl_setopt($this->handle, CURLOPT_ACCEPT_ENCODING, 'gzip,deflate');
            $result = curl_exec($this->handle);
            $debug = array();
            if (Dever::shell('debug')) {
                $debug['request'] = curl_getinfo($this->handle, CURLINFO_HEADER_OUT);
            } elseif ($this->get_info) {
                $result = curl_getinfo($this->handle);
            }
            curl_close($this->handle);
            $data = $result;
            if (!Dever::shell('all') && is_array($data)) {
                $data = count($data) . ' records';
            }
            $debug['url'] = $this->url;
            $debug['param'] = $this->param;
            $debug['result'] = $data;
            if ($this->log) {
                Dever::log($debug, 'curl');
            }
            Dever::debug($debug, 'curl');
            if (isset($setting['stream'])) {
                exit;
            }
            return $result;
        } catch (\Exception $e) {
            curl_close($this->handle);
            return 'error';
        }
    }
    public function setting($setting = array())
    {
        if ($setting) {
            $this->init();
            foreach ($setting as $k => $v) {
                $method = 'set' . ucfirst($k);
                $this->$method($v);
            }
        }
    }
    public function setVerbose($verbose)
    {
        curl_setopt($this->handle, CURLOPT_VERBOSE, $verbose);
    }
    public function setUserPWD($userpwd)
    {
        curl_setopt($this->handle, CURLOPT_USERPWD, $userpwd);
    }
    public function setTimeOut($time)
    {
        curl_setopt($this->handle, CURLOPT_TIMEOUT, $time);
    }
    public function setCookie($cookie)
    {
        curl_setopt($this->handle, CURLOPT_COOKIE, $cookie);
    }
    public function setParam($param)
    {
        $this->param = $param;
        if (is_array($param)) {
            $param = http_build_query($param);
        }
        curl_setopt($this->handle, CURLOPT_POSTFIELDS, $param);
    }
    public function setEncode($encode)
    {
        curl_setopt($this->handle, CURLOPT_ENCODING, $encode);
    }
    public function setIp($ip)
    {
        $config['CLIENT-IP'] = $ip;
        $config['X-FORWARDED-FOR'] = $ip;
        $this->setHeader($config);
    }
    public function setResultHeader($value)
    {
        $this->result_header = $value;
    }
    public function header()
    {
        return $this->result_header;
    }
    private function headerHandler($curl, $headerLine)
    {
        $len = strlen($headerLine);
        $split = explode(':', $headerLine, 2);
        if (count($split) > 1) {
            $key = trim($split[0]);
            $value = trim($split[1]);
            $this->result_header[$key] = $value;
        }
        return $len;
    }
    public function resultCookie()
    {
        $result = $this->result();
        list($header, $body) = explode("\r\n\r\n", $result, 2);
        preg_match_all("/Set\-Cookie:([^;]*);/", $header, $matches);
        $info['cookie']  = substr($matches[1][0], 1);
        $info['content'] = $body;
        return $info;
    }
}