var table,years,majors,employed, maxlim,maxlimemp;
let dept = new Set();
var dept_map = {};
let yearset = new Set();

function preload() {
  table = loadTable('graduates.csv', 'csv', 'header');
}

function setup() {
  	//count the columns
  	createCanvas(2000,2000);
	majors = table.getColumn('Major');
	var j =1;
	for(var i =0;i<majors.length;i++) {
		dept.add(majors[i]);
	}
	for(var major of dept) {
		dept_map[major] = j;
		j++;
	}
	total = table.getColumn('Total');
  years = table.getColumn('Year');
	employed = table.getColumn('Employed');
	
	maxlim =Math.max.apply(null, total);
	maxlimemp = Math.max.apply(null,employed);
	maxyr = Math.max.apply(null,years);
	minyr = Math.min.apply(null,years);
	
	for(var i =0;i<years.length;i++) {
		yearset.add(years[i]);
	}

}

function draw() {
	background(255);
	line(230,50,230,1000);
	line(430,50,430,1000);
	line(630,50,630,1000);
	line(830,50,830,1000);

	var i =1;	
	for(var major of dept) {
		posy = map(i,1,49,90,1000);
		text(major,20,posy);
		i++;
	}
	for(var j = minyr; j<=maxyr ;j++) {
		posy = map(j,minyr,maxyr+1,90,1000);
		print(posy);
		text(j,400,posy);
	}
	var interval = maxlim/10;	
	for(var l =0;l<=maxlim+interval;l=l+interval) {
		posy = map(l,0,maxlim+interval,65,950);
		text(l,600,posy);
	}

	var intervalemp = maxlimemp/10;	
	for(var l =0;l<=maxlimemp+intervalemp;l=l+intervalemp) {
		posy = map(l,0,maxlimemp+intervalemp,65,950);
		text(l,800,posy);
	}
	
	for(var i =0; i<table.getRowCount();i++) {
		majornum = dept_map[majors[i]];
		//print(majornum);
		majormap = Number(majornum);
		posy1 = map(majornum,1,49,90,1000);
		year = Number(years[i]);
		posy2 = map(year,1993,2016,90,1000);
		
		line(230,posy1,430,posy2);

		totalnum = Number(total[i]);
		posy3 = map(totalnum,0,maxlim+interval,65,950);

		line(430,posy2,630,posy3);
		
		empnum = Number(employed[i]);
		posy4 = map(empnum,0,maxlimemp+intervalemp,65,950);

		line(630,posy3,830,posy4);

	}

}