var request = require('request');
var querystring = require('querystring');
var cheerio = require('cheerio');
var courses = [];
var async = require('async');
var form = {
    username: '3500190',
    password: '1093866620'
};

var formData = querystring.stringify(form);
var contentLength = formData.length;
var cookieJar = request.jar();
var name ='';
var Total_Absence = '';
var myUrls=[];
var obj ={}; //important
var objects = [];

    var student ={
        name:'',
        courses:[],
        links:[]
    };

    exports.handler = function() {
        async.waterfall([
        function(callback) {
            request({
                headers: {
            'Content-Length': contentLength,
            'Content-Type': 'application/x-www-form-urlencoded'
                },
                followAllRedirects: true,
                uri: 'http://lms.yic.edu.sa/moodle/login/',
                body: formData,
                method: 'POST',
                jar: cookieJar
            },
            function (err, res, body) {
                if(err) {
                  console.log(err);
                  callback(true);
                  return;
                }
                console.log('first api');
                $ = cheerio.load(body);
                $('h4','#region-main').each(function(){
                    var course = this.children[0].data;
                    student.courses.push(course);
                    var url = this.parent.parent.children[1].children[0].children[0].children[0].children[1].children[0].attribs.href+'&tab=attendance&att_week=1';
                    student.links.push(url);
                });//end of each course loop
                name = $('a.dropdown-toggle','#essentialnavbar').text();
                student.name = name;
                return callback(false, student); //callback(err,data);
            }); //end of request
        },
        function(argv1,callback) {
            for (i in argv1.links) {
                request({uri:argv1.links[i],
                            jar: cookieJar,
                            followAllRedirects: true,
                            method: 'GET'},(err,res,body)=>{
                    console.log('second api');
                    if(err) {console.log(err);callback(true);return; }
                    $ = cheerio.load(body);
                    var course = $('#page-navbar').find('span');
                    var courseName =course[5].children[0].children[0].children[0].data
                    $('tr','#region-main').each(function(){
                        Total_Absence=this.children[3].children[0].data;
                        if(Total_Absence!=null){
                            if(Total_Absence.indexOf('Hours')!=-1){
                                for (var i=0; i < argv1.courses.length; i++) {
                                    if (argv1.courses[i].includes(courseName.split(' ').slice(0,1))) {
                                        obj = [argv1.courses[i],Total_Absence];
                                        objects.push(obj);
                                        //This is the most important obj in class
                                    }
                            }
                            }
                        }
                    });//end of each absence loop
                });//end of request loop
            }//end of links loop
          return callback(false, objects);
        }
    ],
        function (err, results) {
        if(err) { console.log(err); res.send(500,"Server Error"); return; }
            console.log({api1:results[0], api2:results[1]});
        }
    );


    }