/*

  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 vars 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

};


owjs.week_chart = function(spec) {

    "use strict";

    // parameters provided when creating an "instance" of the chart
    var chart_selector = spec.chart_selector,
        url = spec.url,
        current_day_name = spec.current_day_name

    // Helpers
    function select_x_axis_label(d) {
        /* Given a value, return the label associated with it */
        return d3.select('.x-axis')
    	    .selectAll('text')
    	    .filter(function(x) { return x == d.name; });
    }

    // Methods
    var render = function render() {
        /*
           Build a d3 bar chart, populated with data from the given url.
         */
        var chart = d3.select(chart_selector),
            margin = {top: 20, right: 20, bottom: 30, left: 50},
            width = +chart.attr("width") - margin.left - margin.right,
            height = +chart.attr("height") - margin.top - margin.bottom,
            g = chart.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")"),
            x = d3.scaleBand().rangeRound([0, width]).padding(0.1),
            y = d3.scaleLinear().rangeRound([height, 0]);

        d3.json(url).then(function (data) {
	    x.domain(data.map(function (d) {
	        return d.name;
	    }));

	    y.domain([0, d3.max(data, function (d) {
	        return Number(d.distance);
	    })]);

	    g.append("g")
                .attr('class', 'x-axis')
	        .attr("transform", "translate(0," + height + ")")
	        .call(d3.axisBottom(x))

	    g.selectAll(".bar")
	        .data(data)
	        .enter().append("rect")
                .attr("class", function(d) {
                    if (d.name == current_day_name){
                        select_x_axis_label(d).attr('style', "font-weight: bold;");
                        return 'bar current'
                    }
                    else {
                        return 'bar'
                    }
                })
	        .attr("x", function (d) {
		    return x(d.name);
	        })
	        .attr("y", function (d) {
		    return y(Number(d.distance));
	        })
	        .attr("width", x.bandwidth())
	        .attr("height", function (d) {
		    return height - y(Number(d.distance));
	        })
                .on('mouseover', function(d) {
                    if (d.name != current_day_name){
                        select_x_axis_label(d).attr('style', "font-weight: bold;");
                    }
  		})
  		.on('mouseout', function(d) {
                    if (d.name != current_day_name){
        	        select_x_axis_label(d).attr('style', "font-weight: regular;");
                    }
                });

            g.selectAll(".text")
                .data(data)
                .enter()
                .append("text")
                .attr("class","label")
	        .attr("x", function (d) {
		    return x(d.name) + x.bandwidth()/2;
	        })
	        .attr("y", function (d) {
                    return y(Number(d.distance) + 5);
	        })
                .text(function(d) {
                    if (Number(d.distance) > 0) {
                        return d.distance;
                    }
                });

        });
    };

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

};


owjs.year_chart = function(spec) {

    "use strict";

    // parameters provided when creating an "instance" of the chart
    var chart_selector = spec.chart_selector,
        filters_selector = spec.filters_selector,
        url = spec.url,
        current_month = spec.current_month,
        y_axis_labels = spec.y_axis_labels;

    // Helpers
    function select_x_axis_label(d) {
        /* Given a value, return the label associated with it */
        return d3.select('.x-axis-b')
    	    .selectAll('text')
    	    .filter(function(x) { return x == d.name; });
    };

    function get_y_value(d, filter_by) {
        return Number(d[filter_by]);
    };

    function get_y_axis_label(filter_by) {
        return y_axis_labels[filter_by];
    };

    // Methods
    var filters_setup = function filters_setup() {
        $(filters_selector).on('click', function(e) {
            var filter_by = 'distance';
            e.preventDefault();
            filter_by = $(this).attr('class').split('-')[1]
            var chart = d3.select(chart_selector);
            chart.selectAll("*").remove();
            render(filter_by);
        });
    };

    var render = function render(filter_by) {
        /*
          Build a d3 bar chart, populated with data from the given url.
        */
        var chart = d3.select(chart_selector),
            margin = {top: 20, right: 20, bottom: 30, left: 50},
            width = +chart.attr("width") - margin.left - margin.right,
            height = +chart.attr("height") - margin.top - margin.bottom,
            g = chart.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")"),
            x = d3.scaleBand().rangeRound([0, width]).padding(0.1),
            y = d3.scaleLinear().rangeRound([height, 0]);

        d3.json(url).then(function (data) {
	    x.domain(data.map(function (d) {
	        return d.name;
	    }));

	    y.domain([0, d3.max(data, function (d) {
                return get_y_value(d, filter_by);
	    })]);

	    g.append("g")
                .attr('class', 'x-axis-b')
	        .attr("transform", "translate(0," + height + ")")
                .call(d3.axisBottom(x))

            g.append("g")
	        .call(d3.axisLeft(y))
	        .append("text")
	        .attr("fill", "#000")
	        .attr("transform", "rotate(-90)")
	        .attr("y", 6)
	        .attr("dy", "0.71em")
	        .attr("text-anchor", "end")
	        .text(get_y_axis_label(filter_by));

	    g.selectAll(".bar")
	        .data(data)
	        .enter().append("rect")
                .attr("class", function(d) {
                    if (d.id == current_month){
                        select_x_axis_label(d).attr('style', "font-weight: bold;");
                        return 'bar current'
                    }
                    else {
                        return 'bar'
                    }
                })
	        .attr("x", function (d) {
		    return x(d.name);
	        })
	        .attr("y", function (d) {
		    return y(get_y_value(d, filter_by));
	        })
	        .attr("width", x.bandwidth())
	        .attr("height", function (d) {
		    return height - y(get_y_value(d, filter_by));
	        })
                .on('mouseover', function(d) {
                    if (d.id != current_month){
                        select_x_axis_label(d).attr('style', "font-weight: bold;");
                    }
  		})
  		.on('mouseout', function(d) {
                    if (d.id != current_month){
        	        select_x_axis_label(d).attr('style', "font-weight: regular;");
                    }
                })
                .on('click', function(d) {
                    window.location.href = d.url;
                });

            g.selectAll(".text")
                .data(data)
                .enter()
                .append("text")
                .attr("class","label")
	        .attr("x", function (d) {
		    return x(d.name) + x.bandwidth()/2;
	        })
	        .attr("y", function (d) {
                    /*
                      Get the value for the current bar, then get the maximum
                      value to be displayed in the bar, which is used to
                      calculate the proper position of the label for this bar,
                      relatively to its height (1% above the bar)
                     */
                    var value = get_y_value(d, filter_by);
                    var max = y.domain()[1];
                    return y(value + y.domain()[1] * 0.01);
	        })
                .text(function(d) {
                    var value = get_y_value(d, filter_by)
                    if ( value > 0) {
                        return value;
                    }
                });

        });
    };

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

};