/*=========================================================================================
    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());
    }
});