'use strict';

var BuoyAnalysisMap = {
    /**
     *
     */
    reticle: {
        stations: [],
        x: 200,
        y: 300,
        scale: d3.scale.linear()
            .domain([0, 100])
            .range([20, 350])
    },

    /**
     *
     */
    projection: d3.geo.mercator()
                .center([-122, 37.5])
                .scale(2600)
                .translate([BuoyAnalysisData.mapW / 2, BuoyAnalysisData.mapH / 2]),

    /**
     *
     */
    stationColorScale: d3.scale.linear().domain([42, 37.5, 33]).range(['blue', 'orange', 'purple']),

    /**
     *
     */
    drawMap: function() {
        var path = d3.geo.path().projection(BuoyAnalysisMap.projection);

        d3.select('#map svg').append("path")
          .datum(topojson.feature(BuoyAnalysisData.mapJson, BuoyAnalysisData.mapJson.objects._map))
                .attr('d', path)
                .classed('feature', true)
    },

    /**
     *
     */
    drawStations: function() {
        var tmp;
        var station;
        var stations = [];

        for (var prop in BuoyAnalysisData.stationJson) {
            station = BuoyAnalysisData.stationJson[prop];

            tmp = BuoyAnalysisMap.projection([station.lon, station.lat]);
            station.x = tmp[0];
            station.y = tmp[1];

            station.color = BuoyAnalysisMap.stationColorScale(Math.round(station.lat));

            stations.push(station);
        }

        d3.select("#map svg").selectAll('circle')
            .data(stations)
            .enter().append('circle')
                .attr('cx', function(d) { return d.x; })
                .attr('cy', function(d) { return d.y; })
                .attr('r', 5)
                .attr('id', function(d) { return 's' + d.id; })
                .attr('fill', function(d) { return d.color; });
    },

    /**
     *
     */
    drawReticle: function() {
        var r = BuoyAnalysisMap.reticle.scale(d3.select('.reticle-sizer').property('value'));

        d3.select("#map svg").append('circle')
            .attr('r', r)
            .attr('fill', 'rgba(200, 200, 200, 0.5)')
            .attr("transform", "translate(" + BuoyAnalysisMap.reticle.x + "," + BuoyAnalysisMap.reticle.y + ")")
            .data([ {"x": BuoyAnalysisMap.reticle.x, "y": BuoyAnalysisMap.reticle.y } ])
            .classed('reticle', true);
    },

    /**
     *
     */
    findStationsUnderReticle: function() {
        var reticle = d3.select('.reticle');
        var dX, dY, squares, distance, station;
        var stations = [];

        for (var s in BuoyAnalysisData.stationJson) {
            station = BuoyAnalysisData.stationJson[s];

            dX = reticle.data()[0].x - station.x;
            dY = reticle.data()[0].y - station.y;

            squares = Math.pow(dX, 2) + Math.pow(dY, 2)
            distance = Math.pow(squares, 0.5);

            if (distance < reticle.attr('r')) {
                stations.push(s);
            }
        };

        stations.sort(function(a, b) {
            return BuoyAnalysisData.stationJson[a].lat < BuoyAnalysisData.stationJson[b].lat;
        });

        BuoyAnalysisMap.reticle.stations = stations;
    }
};