var BuoyAnalysisData = {
    mapW: 450,

    mapH: 450,

    mapJson: {},

    stationJson: {},

    /**
     *
     */
    populateMapData: function() {
        return new Promise(function(resolve) {
            d3.json('client/_map.json', function(error, json) {
                BuoyAnalysisData.mapJson = json;
                resolve();
            });
        });
    },

    /**
     *
     */
    populateSrcFile: function() {
        return new Promise(function(resolve) {
            d3.json('client/_stations.json', function(error, json) {
                BuoyAnalysisData.stationJson = json;
                resolve();
            });
        });
    },

    /**
     *
     */
    calculateYearlyAverages: function(stations) {
        var sum, count, avg;
        var years = {};

        for (var i = 1982; i < 2016; i++) {
            sum = 0;
            count = 0;

            stations.forEach(function(id) {
                avg = BuoyAnalysisData.stationJson[id]['avgs' + i];

                if (avg === undefined || avg.y === 0) {
                    return;
                }

                sum += avg.y;
                count++;
            });

            years['y' + i] = (sum / count) || 0;
        }

        return years;
    },

    /**
     *
     */
    calculateMonthlyAverages: function(stations, year) {
        var sum, count, avg;
        var months = {};

        for (var i = 0; i < 12; i++) {
            sum = 0;
            count = 0;

            stations.forEach(function(id) {
                avg = BuoyAnalysisData.stationJson[id]['avgs' + year];

                if (avg === undefined || avg.m[i] === 0) {
                    return;
                }


                sum += avg.m[i];
                count++;
            });

            months['m' + i] = (sum / count) || 0;
        }

        return months;
    }
};