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

    File Name: stacked-bar.js

    Description: D3 stacked bar chart

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

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

    Author: PIXINVENT

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

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



// Stacked bar chart

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

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



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

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

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

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



    // Initialize Scales

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



    var x = d3.scale.ordinal()

        .rangeRoundBands([0, width], .1);



    var y = d3.scale.linear()

        .rangeRound([height, 0]);



    // Initialize Colors

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

    var color = d3.scale.ordinal()

    .range(["#99B898", "#C7C29F", "#FECEA8", "#FEAC94", "#FF847C", "#F56A6F", "#E84A5F"]);



    // Initialize Axis

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

    var xAxis = d3.svg.axis()

        .scale(x)

        .orient("bottom");



    var yAxis = d3.svg.axis()

        .scale(y)

        .orient("left")

        .tickFormat(d3.format(".2s"));



    // Chart

    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.csv("../../../app-assets/data/d3/bar/stacked-bar.csv", function(error, data) {

        if (error) throw error;



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



        data.forEach(function(d) {

            var y0 = 0;

            d.ages = color.domain().map(function(name) { return {name: name, y0: y0, y1: y0 += +d[name]}; });

            d.total = d.ages[d.ages.length - 1].y1;

        });



        data.sort(function(a, b) { return b.total - a.total; });



        x.domain(data.map(function(d) { return d.State; }));

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



        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)

        .append("text")

            .attr("transform", "rotate(-90)")

            .attr("y", 6)

            .attr("dy", ".71em")

            .style("text-anchor", "end")

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

            .style("font-size", 12)

            .text("Population");



        var state = svg.selectAll(".state")

            .data(data)

        .enter().append("g")

            .attr("class", "state")

            .attr("transform", function(d) { return "translate(" + x(d.State) + ",0)"; });



        state.selectAll(".d3-bar")

            .data(function(d) { return d.ages; })

        .enter().append("rect")

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

            .attr("width", x.rangeBand())

            .attr("y", function(d) { return y(d.y1); })

            .attr("height", function(d) { return y(d.y0) - y(d.y1); })

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



        var legend = svg.selectAll(".legend")

            .data(color.domain().slice().reverse())

        .enter().append("g")

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

            .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });



        legend.append("rect")

            .attr("x", width - 18)

            .attr("width", 18)

            .attr("height", 18)

            .style("fill", color);



        legend.append("text")

            .attr("x", width - 24)

            .attr("y", 9)

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

            .style("text-anchor", "end")

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

    });



    // 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.rangeRoundBands([0, width], .1, .5);

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



        // Bar group

        svg.selectAll('.state').attr("transform", function(d) { return "translate(" + x(d.State) + ",0)"; });



        // Bars

        svg.selectAll('.d3-bar').attr("width", x.rangeBand()).attr("x", function(d) { return x(d.name); });



        // Legend

        svg.selectAll(".d3-legend text").attr("x", width - 24);

        svg.selectAll(".d3-legend rect").attr("x", width - 18);

    }

});