function calculateTime(seconds) {
	minutes = 0;
	if (seconds > 59) {
		minutes = seconds / 60;
		return minutes + ' minuter och ' + (seconds-minutes*60) + ' sekunder';
	} else {
		return seconds + ' sekunder';
	}
}
function calculateSize(parameter, decimals, prefix, suffix, ett, tva) {
	if (typeof parameter == 'number') {
		//console.log(ett + '|' + tva);
		
		if (parameter/1000000 > 1) {
			return (parameter/1000000).toFixed(decimals) + prefix + 'MB' + suffix
		} else if (parameter/1000 > 1) {
			return (parameter/1000).toFixed(decimals) + prefix + 'KB' + suffix
		} else if (parameter > 0) {
			return parameter.toFixed(decimals) + prefix + 'B' + suffix
		} else {
			return parameter + prefix + 'B' + suffix
		}
	} else {
		return 'NAN: ' + parameter;
	}
}

meassurements = [];
content = {};
seconds = 0;
biggestDiffen = 0;

function speedCalculator() {
	seconds++;
}

function hastighetsTimerSlut() {
	clearInterval(hastighetsTimer);
}

hastighetskollen = new XMLHttpRequest();
hastighetskollen.onprogress = function(event) {
	if (event.lengthComputable) {
		window.newloaded = event.loaded;
		//i++;
		diffen = typeof window.oldloaded != 'undefined' ? window.newloaded - window.oldloaded : 0;
		if (diffen > 0) {
			meassurements.push(diffen);
		}
		if (diffen > biggestDiffen) {
			biggestDiffen = diffen;
		}
			document.getElementById('remaining').innerHTML = calculateTime(Math.round((event.total - event.loaded) * seconds / event.loaded));
			document.getElementById('percent').innerHTML = (event.loaded / event.total * 100).toFixed(2) + '%';
			document.getElementById('loaded').innerHTML = calculateSize(event.loaded, 2, ' ', '');
			document.getElementById('total').innerHTML = calculateSize(event.total, 2, ' ', '');
			document.getElementById('time').innerHTML = calculateTime(seconds);
		document.getElementById('speed').innerHTML = calculateSize(diffen, 2, ' ', 'IT', window.newloaded, window.oldloaded);
		
			document.querySelector('#statusbar > span').style.width = event.loaded / event.total * 100 + '%';
			
			//document.querySelector('.fa-arrow-circle-o-left').style.transform = 'rotate(' + (180 * event.loaded / event.total) + 'deg)';
			document.querySelector('.fa-arrow-circle-o-left').style.transform = 'rotate(' + (180 * diffen / biggestDiffen) + 'deg)';
			
		window.oldloaded = window.newloaded;
	} else {
		// Unable to compute progress information since the total size is unknown
	}
}

hastighetskollen.load = function() {
	document.body.style.background = 'lightgreen';
}

hastighetskollen.onabort = function() {
	document.body.style.background = 'lemon';
}

hastighetskollen.onerror = function() {
	document.body.style.background = 'pink';
}

hastighetskollen.onreadystatechange = function() {
	//console.log("readyState: " + hastighetskollen.readyState + "\nstatus: " + hastighetskollen.status + "\nstatusText: " + hastighetskollen.statusText);
	if (hastighetskollen.readyState == 1) {
		//document.querySelector('i').style.display = 'block';
	}
	if (hastighetskollen.readyState == 4) {
		if (hastighetskollen.status == 200) {
			//document.querySelector('i').style.display = 'none';
			//myFunction(hastighetskollen);
			
			hastighetsTimerSlut();
			
			document.getElementById('of').style.display = 'none';
			document.getElementById('left').style.display = 'none';
			document.getElementById('tempus').innerHTML = 'tog';
			document.getElementById('calculated').innerHTML = 'beräknas vara';
			
			meassurements.sort();
			
			content['speed'] = {};
			content['speed']['meassurements'] = meassurements;
			
			content['time'] = {};
			content['time']['computer readable'] = seconds;
			content['time']['human readable'] = calculateTime(content['time']['computer readable']);
			document.getElementById('time').innerHTML = content['time']['human readable'];
			
			content['file size'] = {};
			content['file size']['computer readable'] = 7865288;
			content['file size']['human readable'] = calculateSize(content['file size']['computer readable'], 2, ' ', ''); document.getElementById('total').innerHTML;
			
			content['speed']['slowest'] = {};
			content['speed']['slowest']['computer readable'] = meassurements[0];
			content['speed']['slowest']['human readable'] = calculateSize(content['speed']['slowest']['computer readable'], 2, ' ', 'IT');
			
			content['speed']['fastest'] = {};
			content['speed']['fastest']['computer readable'] = meassurements[meassurements.length-1];
			content['speed']['fastest']['human readable'] = calculateSize(content['speed']['fastest']['computer readable'], 2, ' ', 'IT');
			
			content['speed']['average'] = {};
			content['speed']['average']['computer readable'] = meassurements.reduce((a, b) => a + b, 1) / meassurements.length;
			content['speed']['average']['human readable'] = calculateSize(content['speed']['average']['computer readable'], 2, ' ', 'IT');
			
			content['speed']['median'] = {};
			content['speed']['median']['computer readable'] = meassurements[Math.floor(meassurements.length/2)];
			content['speed']['median']['human readable'] = calculateSize(content['speed']['median']['computer readable'], 2, ' ', 'IT');
			document.getElementById('speed').innerHTML = content['speed']['median']['human readable'];
			
			pausa.style.display = 'none';
			abort.style.display = 'none';
			restart.style.display = 'inline-block';
			exporta.style.display = 'inline-block';
		} else {
			retry.style.display = 'inline-block';
		}
	}
};

hastighetskollen.open('GET', '/cors/feed.xml?unix-timestamp=' + Date.now()); // ?" + (Math.random().toString(16) + "000000").substring(2,8), true);

exporta.onclick = function() {
	//file = new Blob([JSON.stringify(meassurements)], {type: 'application/x-please-download-me'});
	console.log(content);
	file = new Blob([JSON.stringify(content, null, 4)], {type: 'application/json'});
	url = URL.createObjectURL(file);
	link = document.createElement('a');
	link.href = url;
	datum = Date;
	datetime = new Date().toLocaleDateString('sv-SE', { year: 'numeric', month: 'numeric', day: 'numeric', hour: 'numeric', minute: 'numeric' }).replace(/:| /g, '-');
	link.download = 'meassurements-' + datetime + '.json';
	link.click();
	//window.location.href = url;
}

start.onclick = function() {
	document.getElementById('statusbar').style.display = 'block';
	document.getElementById('speed-info').style.display = 'block';
	
	speedintro.style.display = 'none';
	this.style.display = 'none';
	pausa.style.display = 'inline-block';
	abort.style.display = 'inline-block';
	hastighetsTimer = setInterval(function() {
		speedCalculator()
	}, 1000);
	hastighetskollen.send();
}

restart.onclick = function() {
	this.style.display = 'none';
	exporta.style.display = 'none';
	pausa.style.display = 'inline-block';
	abort.style.display = 'inline-block';
	seconds = 0;
	biggestDiffen = 0;
	meassurements = [];
	window.newloaded = 0;
	hastighetsTimer = setInterval(function() {
		speedCalculator()
	}, 1000);
	hastighetskollen.open('GET', '/cors/feed.xml?unix-timestamp=' + Date.now());
	hastighetskollen.send();
}

pausa.onclick = function() {
	this.style.display = 'none';
	resume.style.display = 'inline-block';
	hastighetsTimerSlut();
}

abort.onclick = function() {
	hastighetsTimerSlut();
	seconds = 0;
	biggestDiffen = 0;
	window.newloaded = 0;
	this.style.display = 'none';
	pausa.style.display = 'none';
	resume.style.display = 'none';
	start.style.display = 'inline-block';
}

resume.onclick = function() {
	this.style.display = 'none';
	pausa.style.display = 'inline-block';
	abort.style.display = 'inline-block';
	hastighetsTimer = setInterval(function() {
		speedCalculator()
	}, 1000);
}

retry.onclick = function() {
	hastighetsTimerSlut();
	seconds = 0;
	biggestDiffen = 0;
	meassurements = [];
	window.newloaded = 0;
	hastighetsTimer = setInterval(function() {
		speedCalculator()
	}, 1000);
	hastighetskollen.open('GET', '/cors/feed.xml?unix-timestamp=' + Date.now());
	hastighetskollen.send();
	this.style.display = 'none';
	pausa.style.display = 'inline-block';
	abort.style.display = 'inline-block';
}