<?php
/**
 * Created by PhpStorm.
 * User: Jaeger <JaegerCode@gmail.com>
 * Date: 2017/9/27
 * Curl multi threading
 */

namespace QL\Ext;

use Ares333\Curl\Curl;
use QL\Contracts\PluginContract;
use QL\QueryList;
use Closure;

class CurlMulti implements PluginContract
{
    protected $urls = [];
    protected $queryList;
    protected $successCallback;
    protected $curl;
    protected $isRunning = false;


    public function __construct(QueryList $queryList,$urls)
    {
        $this->urls = is_string($urls)?[$urls]:$urls;
        $this->queryList = $queryList;
        $this->curl = new Curl();
        $this->curl->opt = [
            CURLOPT_RETURNTRANSFER => true
        ];
    }


    public static function install(QueryList $queryList, ...$opt)
    {
        $name = $opt[0] ?? 'curlMulti';
        $queryList->bind($name,function ($urls = []){
            return new CurlMulti($this,$urls);
        });
    }

    public function getUrls()
    {
        return $this->urls;
    }

    public function add($urls)
    {
        is_string($urls) && $urls = [$urls];
        $this->urls = array_merge($this->urls,$urls);
        //如果当前任务正在运行就实时动态添加任务
        $this->isRunning && $this->addTasks($urls);
        return $this;
    }

    public function success(Closure $callback)
    {
        $this->successCallback = function ($r) use($callback){
           $this->queryList->setHtml($r['body']);
           $callback($this->queryList,$this,$r);
        };
        return $this;
    }

    public function error(Closure $callback)
    {
        $this->curl->cbFail = function ($info) use($callback){
            $callback($info,$this);
        };
        return $this;
    }

    public function start(array $opt = [])
    {
        $this->bindOpt($opt);
        $this->addTasks($this->urls);

        $this->isRunning = true;
        $this->curl->start();
        $this->isRunning = false;

        $this->urls = [];
        return $this;
    }

    protected function bindOpt($opt)
    {
        foreach ($opt as $key => $value) {
            if($key == 'opt'){
                $this->curl->opt = $this->arrayMerge($this->curl->opt,$value);
            }else {
                $this->curl->$key = $value;
            }
        }
    }

    protected function addTasks($urls)
    {
        foreach ($urls as $url) {
            $this->curl->add([
                'opt' => array(
                    CURLOPT_URL => $url
                )
            ],$this->successCallback);
        }
    }

    protected function arrayMerge($arr1,$arr2)
    {
        foreach ($arr2 as $key => $value) {
            $arr1[$key] = $value;
        }
        return $arr1;
    }

}