// Instantiate the map
Highcharts.mapChart('container', {
    chart: {
        map: 'custom/europe',
        spacingBottom: 20
    },

    title: {
        text: 'Europe time zones'
    },

    legend: {
        enabled: true
    },

    plotOptions: {
        map: {
            allAreas: false,
            joinBy: ['iso-a2', 'code'],
            dataLabels: {
                enabled: true,
                color: '#FFFFFF',
                style: {
                    fontWeight: 'bold'
                },
                // Only show dataLabels for areas with high label rank
                format: null,
                formatter: function () {
                    if (this.point.properties && this.point.properties.labelrank.toString() < 5) {
                        return this.point.properties['iso-a2'];
                    }
                }
            },
            tooltip: {
                headerFormat: '',
                pointFormat: '{point.name}: <b>{series.name}</b>'
            }
        }
    },

    series: [{
        name: 'UTC',
        data: ['IE', 'IS', 'GB', 'PT'].map(function (code) {
            return { code: code };
        })
    }, {
        name: 'UTC + 1',
        data: ['NO', 'SE', 'DK', 'DE', 'NL', 'BE', 'LU', 'ES', 'FR', 'PL', 'CZ', 'AT', 'CH', 'LI', 'SK', 'HU',
            'SI', 'IT', 'SM', 'HR', 'BA', 'YF', 'ME', 'AL', 'MK'].map(function (code) {
            return { code: code };
        })
    }, {
        name: 'UTC + 2',
        data: ['FI', 'EE', 'LV', 'LT', 'BY', 'UA', 'MD', 'RO', 'BG', 'GR', 'TR', 'CY'].map(function (code) {
            return { code: code };
        })
    }, {
        name: 'UTC + 3',
        data: [{
            code: 'RU'
        }]
    }]
});