var chart = c3.generate({
	bindto: '#chart',
	transition: {
		duration: null
	},
	title: {
		text: 'Der See'
	},
	data: {
		url: '/data/', // redirects to /data/1
		mimeType: 'json',
		xs: {
			'0316a2193bff': '0316a2193bff_x',
			'0316a21383ff': '0316a21383ff_x'
		},
		names: {
			'0316a2193bff': 'Wassertemperatur in 4 m Tiefe',
			'0316a21383ff': 'Wassertemperatur in 5 m Tiefe'
		},
		xFormat: '%Y-%m-%d %H:%M:%S'
	},
	axis: {
		x: {
			type: 'timeseries',
			tick: {
				format: '%Y-%m-%d %H:%M',
				fit: false,
				multiline: true, // broken? so →
				rotate: -90
			}
		},
		y: {
			label: {
				text: 'Temperatur in °C',
				position: 'outer-middle'
			},
			tick: {
				format: function (d) {
					return d + '°';
				}
			}
		}
	},
	zoom: {
		enabled: true,
		onzoomend: function (domain) {
			// UNIX epoch
			var start = domain[0].getTime()/1000;
			var end   = domain[1].getTime()/1000;
			var duration = end- start;
			// duration is now the diff of the "viewport in seconds"
			// and now we could try and load more/less data
			// this works but doesn't make sense :)
			/*
			chart.load({
				url: '/data/7',
				mimeType: 'json'
			});
			*/
		}
	},
	tooltip: {
		format: {
			name: function (name, ratio, id, index) {
				var re = /\d m/;
				var res = re.exec(name);
				return res;
			},
			value: function (value, ratio, id, index) {
				return value + '°';
			}
		}
	},
	grid: {
		y: {
			show: true
		}
	},
	regions: [
		{axis: 'y', start: -999, end:   0, class: 'region-frozen'},
		{axis: 'y', start:    0, end:  25, class: 'region-ok'},
		{axis: 'y', start:   25, end: 100, class: 'region-warm'},
		{axis: 'y', start:  100, end: 999, class: 'region-boiling'}
	]
});