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

    File Name: bar.js

    Description: D3 simple bar chart

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

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

    Author: PIXINVENT

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

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



// Bar chart

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

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



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

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





    // Initialize Scales

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



    var x = d3.scale.ordinal()

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



    var y = d3.scale.linear()

        .range([height, 0]);



    // Initialize Axis

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

    var xAxis = d3.svg.axis()

        .scale(x)

        .orient("bottom");



    var yAxis = d3.svg.axis()

        .scale(y)

        .orient("left")

        .tickFormat(formatPercent);



    // Chart

    var tip = d3.tip()

        .attr('class', 'd3-tip')

        .offset([-10, 0])

        .html(function(d) {

            return "<strong>Frequency:</strong> <span style='color:#FF847C'>" + d.frequency + "</span>";

        });



    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 + ")");



    svg.call(tip);



    // Load data

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



    d3.tsv("../../../app-assets/data/d3/bar/bar.tsv", type, function(error, data) {

        if (error) throw error;



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

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



        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", "#1DE9B6")

            .style("font-size", 12)

            .text("Frequency");



        svg.selectAll(".d3-bar")

            .data(data)

        .enter().append("rect")

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

            .attr("x", function(d) { return x(d.letter); })

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

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

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

            .on('mouseover', tip.show)

            .on('mouseout', tip.hide)

            .style("fill", "#1DE9B6");

    });



    function type(d) {

        d.frequency = +d.frequency;

        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);

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





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

    }

});