/*

  OpenWorkouts Javascript code

*/


// Namespace
var owjs = {};


owjs.map = function(spec) {

    "use strict";

    // parameters provided when creating an "instance" of a map
    var map_id = spec.map_id;
    var latitude = spec.latitude;
    var longitude = spec.longitude;
    var zoom = spec.zoom;
    var gpx_url = spec.gpx_url;
    var start_icon = spec.start_icon;
    var end_icon = spec.end_icon;
    var shadow = spec.shadow;
    var elevation = spec.elevation;
    var zoom_control = spec.zoom_control;

    // OpenStreetMap urls and references
    var openstreetmap_url = 'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png';
    var openstreetmap_attr = 'Map data &copy; <a href="http://www.osm.org">OpenStreetMap</a>';

    // Some constants reused through the code
    var map;
    var gpx;
    var elevation;
    var ow_charts;

    var create_map = function create_map(latitude, longitude, zoom) {
        /* Create a Leaflet map, set center point and add tiles */
        map = L.map(map_id, {zoomControl: zoom_control});
        map.setView([latitude, longitude], zoom);
        var tile_layer = L.tileLayer(openstreetmap_url, {
            attribution: openstreetmap_attr
        });
        tile_layer.addTo(map);
    };

    var add_elevation_chart = function add_elevation_chart() {
        /*
           Add the elevation chart support to the map.
           This has to be called *after* create_map and *before* load_gpx.
        */
        elevation = L.control.elevation({
            position: "bottomright",
            theme: "steelblue-theme", //default: lime-theme
            width: 600,
            height: 125,
            margins: {
                top: 10,
                right: 20,
                bottom: 30,
                left: 50
            },
            useHeightIndicator: true, //if false a marker is drawn at map position
            interpolation: "linear", //see https://github.com/mbostock/d3/wiki/SVG-Shapes#wiki-area_interpolate
            hoverNumber: {
                decimalsX: 3, //decimals on distance (always in km)
                decimalsY: 0, //deciamls on height (always in m)
                formatter: undefined //custom formatter function may be injected
            },
            xTicks: undefined, //number of ticks in x axis, calculated by default according to width
            yTicks: undefined, //number of ticks on y axis, calculated by default according to height
            collapsed: false    //collapsed mode, show chart on click or mouseover
        });

        var ele_container = elevation.addTo(map);
        /* document.getElementById('ow-analysis').appendChild(
            ele_container._container); */
    };

    var load_gpx = function load_gpx(gpx_url) {
        /*
          Load the gpx from the given url, add it to the map and feed it to the
          elevation chart
        */
        var gpx = new L.GPX(gpx_url, {
            async: true,
            marker_options: {
                startIconUrl: start_icon,
                endIconUrl: end_icon,
                shadowUrl: shadow,
            },
        });

        gpx.on('loaded', function(e) {
	    map.fitBounds(e.target.getBounds());
	});

        if (elevation) {
            gpx.on("addline",function(e){
                elevation.addData(e.line);
                // ow_charts.addData(e.line);
            });
        };

        gpx.addTo(map);
    };

    var render = function render() {
        // create the map, add elevation, load gpx
        create_map(latitude, longitude, zoom);
        if (elevation) {
            add_elevation_chart();
        }
        // add_ow_charts();
        load_gpx(gpx_url);
    };

    var that = {}
    that.render = render;
    return that

};