/*=========================================================================================

    File Name: stacked-area.js

    Description: d3 stacked area chart

    ----------------------------------------------------------------------------------------

    Item Name: Modern Admin - Clean Bootstrap 4 Dashboard HTML Template

    Author: PIXINVENT

    Author URL: http://www.themeforest.net/user/pixinvent

==========================================================================================*/



// Stacked Area chart

// ------------------------------

$(window).on("load", function(){



    var ele = d3.select("#stacked-area"),

    margin = {top: 20, right: 20, bottom: 30, left: 50},

    width = ele.node().getBoundingClientRect().width - margin.left - margin.right,

    height = 500 - margin.top - margin.bottom;



    var parseDate = d3.time.format("%y-%b-%d").parse,

    formatPercent = d3.format(".0%");



    var browser;



    // Scales

    // ------------------------------



    var x = d3.time.scale()

        .range([0, width]);



    var y = d3.scale.linear()

        .range([height, 0]);



    // Color

    var color = d3.scale.ordinal()

        .range(["#99B898", "#FECEA8", "#FF847C", "#E84A5F", "#2A363B"]);



    // Axis

    // ------------------------------

    var xAxis = d3.svg.axis()

        .scale(x)

        .orient("bottom");



    var yAxis = d3.svg.axis()

        .scale(y)

        .orient("left")

        .tickFormat(formatPercent);



    // Chart

    var area = d3.svg.area()

        .x(function(d) { return x(d.date); })

        .y0(function(d) { return y(d.y0); })

        .y1(function(d) { return y(d.y0 + d.y); });



    // Stack

    var stack = d3.layout.stack()

        .values(function(d) { return d.values; });



    var container = ele.append("svg");



    var svg = container

        .attr("width", width + margin.left + margin.right)

        .attr("height", height + margin.top + margin.bottom)

      .append("g")

        .attr("transform", "translate(" + margin.left + "," + margin.top + ")");







    // Load data

    // ------------------------------



    d3.tsv("../../../app-assets/data/d3/line/stacked-area.tsv", function(error, data) {

        if (error) throw error;



        color.domain(d3.keys(data[0]).filter(function(key) { return key !== "date"; }));



        data.forEach(function(d) {

            d.date = parseDate(d.date);

        });



        var browsers = stack(color.domain().map(function(name) {

            return {

                name: name,

                values: data.map(function(d) {

                    return {date: d.date, y: d[name] / 100};

                })

            };

        }));



        x.domain(d3.extent(data, function(d) { return d.date; }));



        browser = svg.selectAll(".browser")

            .data(browsers)

        .enter().append("g")

            .attr("class", "browser");



        browser.append("path")

            .attr("class", "d3-area")

            .attr("d", function(d) { return area(d.values); })

            .style("fill", function(d) { return color(d.name); });



        browser.append("text")

            .datum(function(d) { return {name: d.name, value: d.values[d.values.length - 1]}; })

            .attr("transform", function(d) { return "translate(" + x(d.value.date) + "," + y(d.value.y0 + d.value.y / 2) + ")"; })

            .attr("x", -6)

            .attr("dy", ".35em")

            .style("fill", "#666")

            .style("font-size", 12)

            .text(function(d) { return d.name; });



        svg.append("g")

            .attr("class", "d3-axis d3-xaxis")

            .attr("transform", "translate(0," + height + ")")

            .call(xAxis);



        svg.append("g")

            .attr("class", "d3-axis d3-yaxis")

            .call(yAxis);

    });



    // Resize chart

    // ------------------------------



    // Call function on window resize

    $(window).on('resize', resize);



    // Call function on sidebar width change

    $('.menu-toggle').on('click', resize);



    // Resize function

    // ------------------------------

    function resize() {



        width = ele.node().getBoundingClientRect().width - margin.left - margin.right;



        // Main svg width

        container.attr("width", width + margin.left + margin.right);



        // Width of appended group

        svg.attr("width", width + margin.left + margin.right);





        // Axis

        // -------------------------

        x.range([0, width]);

        svg.selectAll('.d3-xaxis').call(xAxis);





        browser.selectAll('.d3-area').attr("d", function(d) { return area(d.values); });

    }

});