var handleImport = function(e) {
	var target = e.target;
	var result = target.result;
	var resultsArray = result.split('\n');
	var rows = resultsArray.map( function(row) { return row.split(',') });
	var headings = rows.shift();
	var data = rows.map(function(row) {
		return headings.reduce(function(r, key, i) {
			r[key.trim()] = row[i];

			return r;
		}, {});
	});

	data = data.filter(function(d) {
		var keys = Object.keys(d);
		return keys.filter(function(key) {
			return d[key];
		}).length > 0;
	});

	addContacts(data, data.length);
}

var addContacts = function(data, total) {
	if (! data.length)
		return alert('Import complete');

	var currentEntries = data.splice(0, 10);

	toolkit.requestGroovy(
		'F2FECACB204DAE44E9D557858DA45E610A6B8D9A',
		'userImporter.groovy',
		{
			contacts: JSON.stringify(currentEntries)
		}
	).then(function(response) {
		var progress = (100 / total) * (total - data.length);
		updateProgress(progress);
		addContacts(data, total);
	});
}

var updateProgress = function(progress) {
	var progressBar = document.querySelector('.usersImporterProgress');
	progressBar.style.width = progress + '%';
}

var handleUpload = function(e) {
	var target = e.target;
	var files = target.files;
	var file = files[0];

	var reader = new FileReader();
	reader.onload = handleImport;
	reader.readAsText(file);
}

var setupHandler = function() {
	document.getElementById('usersImporter').addEventListener('change', handleUpload);
}