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

    File Name: difference.js

    Description: d3 difference chart

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

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

    Author: PIXINVENT

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

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



// Difference chart

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

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



    var ele = d3.select("#difference-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 parseDate = d3.time.format("%Y%m%d").parse;





    // Scales

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



    var x = d3.time.scale()

        .range([0, width]);



    var y = d3.scale.linear()

        .range([height, 0]);



    // Axis

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

    var xAxis = d3.svg.axis()

        .scale(x)

        .orient("bottom");



    var yAxis = d3.svg.axis()

        .scale(y)

        .orient("left");



    // Chart

    var line = d3.svg.area()

        .interpolate("basis")

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

        .y(function(d) { return y(d["New York"]); });



    var area = d3.svg.area()

        .interpolate("basis")

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

        .y1(function(d) { return y(d["New York"]); });



    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/difference.tsv", function(error, data) {

        if (error) throw error;



        data.forEach(function(d) {

            d.date = parseDate(d.date);

            d["New York"]= +d["New York"];

            d["San Francisco"] = +d["San Francisco"];

        });



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



        y.domain([

            d3.min(data, function(d) { return Math.min(d["New York"], d["San Francisco"]); }),

            d3.max(data, function(d) { return Math.max(d["New York"], d["San Francisco"]); })

        ]);



        svg.datum(data);



        svg.append("clipPath")

            .attr("id", "clip-below")

        .append("path")

            .attr("d", area.y0(height));



        svg.append("clipPath")

            .attr("id", "clip-above")

        .append("path")

            .attr("d", area.y0(0));



        svg.append("path")

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

            .attr("clip-path", "url(#clip-above)")

            .attr("d", area.y0(function(d) { return y(d["San Francisco"]); }))

            .style("fill", "#00BCD4");



        svg.append("path")

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

            .attr("clip-path", "url(#clip-below)")

            .attr("d", area)

            .style("fill", "#E91E63");



        svg.append("path")

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

            .attr("d", line);



        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("Temperature (ºF)");

    });



    // 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);





        svg.selectAll('.d3-area').attr("d", area);

    }

});