var legenddistanceAirline = {};
var legenddistanceAlliance = {};

legenddistanceAlliance['OneWorld'] = 6777;
legenddistanceAlliance['Star Alliance'] = 18729;
legenddistanceAlliance['SkyTeam'] = 6010;
legenddistanceAlliance['No Alliance'] = 1738;
legenddistanceAirline['EasyJet'] = 1392;
legenddistanceAirline['Swiss'] = 1456;
legenddistanceAirline['British Airways'] = 753;
legenddistanceAirline['Air Southwest (of UK)'] = 346;
legenddistanceAirline['Air France'] = 6010;
legenddistanceAirline['United Airlines'] = 4112;
legenddistanceAirline['Qantas'] = 6024;
legenddistanceAirline['Air New Zealand'] = 7326;
legenddistanceAirline['Singapore Airlines'] = 5504;
legenddistanceAirline['BMI British Midland'] = 331;
legenddistanceAirline['OneWorld'] = 6777;
legenddistanceAirline['Star Alliance'] = 18729;
legenddistanceAirline['SkyTeam'] = 6010;
legenddistanceAirline['No Alliance'] = 1738;


$(function () {
    var chart;
    $(document).ready(function() {

        var colors = Highcharts.getOptions().colors,


            categories = ['OneWorld','Star Alliance','SkyTeam','No Alliance'],
            name = 'Carriers',
            data = [{
					y: 20.4,
					color: colors[0],
					drilldown: {
						name: 'OneWorld (6777)',
						categories: ['British Airways','Qantas'],
						data: [2.3,18.1],
						color: colors[0]
					}
				} ,{
					y: 56.3,
					color: colors[1],
					drilldown: {
						name: 'Star Alliance (18729)',
						categories: ['Swiss','United Airlines','Air New Zealand','Singapore Airlines','BMI British Midland'],
						data: [4.4,12.4,22,16.6,1],
						color: colors[1]
					}
				} ,{
					y: 18.1,
					color: colors[2],
					drilldown: {
						name: 'SkyTeam (6010)',
						categories: ['Air France'],
						data: [18.1],
						color: colors[2]
					}
				} ,{
					y: 5.2,
					color: colors[3],
					drilldown: {
						name: 'No Alliance (1738)',
						categories: ['EasyJet','Air Southwest (of UK)'],
						data: [4.2,1],
						color: colors[3]
					}
				} 

		];


        // Build the data arrays
        var allianceData = [];
        var carrierData = [];
        for (var i = 0; i < data.length; i++) {

            // add browser data
            allianceData.push({
                name: categories[i],
                y: data[i].y,
                color: data[i].color
            });

            // add version data
            for (var j = 0; j < data[i].drilldown.data.length; j++) {
                var brightness = 0.2 - (j / data[i].drilldown.data.length) / 5 ;
                carrierData.push({
                    name: data[i].drilldown.categories[j],
                    y: data[i].drilldown.data[j],
                    color: Highcharts.Color(data[i].color).brighten(brightness).get()
                });
            }
        }

        // Create the chart
        chart = new Highcharts.Chart({
            chart: {
                renderTo: 'airline_distance',
                type: 'pie'
            },
            title: {
                text: ''
            },
            yAxis: {
                title: {
                    text: ''
                }
            },
            plotOptions: {
                pie: {
                    allowPointSelect: true,
                    cursor: 'pointer',
                    dataLabels: {
                        enabled: true
                    },
                    showInLegend: false
                }
            },
            tooltip: {
        	    valueSuffix: '%'
            },
            series: [{
                name: 'proportion',
                data: allianceData,
                size: '80%',
                dataLabels: {
                    formatter: function() {
                        return this.y > 5 ? this.point.name : null;
                    },
                    color: 'white',
                    distance: -75
                }
            }, {
                name: 'proportion',
                data: carrierData,
                innerSize: '80%',
                dataLabels: {
                    formatter: function() {
                        // display only if larger than 1
                        return this.y > 1 ? '<b>'+ this.point.name +':</b> '+ this.y +
                        	'%' + getCountdistance(this.point.name) : null;
                    }
                }
            }]
        });
    });

});

function getCountdistance(airline)
{
	if(legenddistanceAirline[airline])
	{
		return " (" + parseInt(legenddistanceAirline[airline]).toLocaleString() + ")";
	}
	else
	{
		return "";
	}
}