// Dimensions of chart.
let margin = { top: 20, right: 30, bottom: 50, left: 55 },
    // width = parseInt(d3.select('#chart').style('width'), 10) - margin.left - margin.right,
    width = 600 - margin.left - margin.right,
    // height = width/.8 - margin.top - margin.bottom;
    height = width - margin.top - margin.bottom;
    
let svg = d3.select("#chart").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
    
// Scales: x and y and r
let x = d3.scaleLinear()
    // .domain([3, 6])
    .domain([4, 6])
	.range([0, width]);
let y = d3.scaleLinear()
    // .domain([2, 6])
    .domain([3, 6])
	.range([height, 0]);
let r = d3.scaleSqrt()
    .domain([0, 10])
    .range([0, 25]);

// Point color
let ptcolor = "#5a8171";



// x-axis
let xAxis = d3.axisBottom(x)
    // .ticks(7)
    .ticks(4)
	.tickSize(-height-8)
	.tickPadding(5);
let xAxisEl = svg.append("g")
	.attr("class", "x axis bottom")
	.attr("transform", "translate(0,"+(height+8)+")");
xAxisEl.append("text")
	.attr("class", "axistitle")
	.attr("text-anchor", "start")
	.attr("x", 0).attr("y", 0)
    // .attr("dx", "-.25em")
    .attr("dx", "-.8em")
    .attr("dy", "2.5em")
	.text("Meaningfulness Score Average");
xAxisEl.call(xAxis);


// y-axis
let yAxis = d3.axisLeft(y)
    // .ticks(7)
    .ticks(5)
	.tickSize(-width-8)
	.tickPadding(5);
let yAxisEl = svg.append("g")
	.attr("class", "y axis left")
    .attr("transform", "translate("+(-8)+",0)");
yAxisEl.append("text")
	.attr("class", "axistitle")
	.attr("x", 0).attr("y", 0)
    .attr("dx", "4px")
    // .attr("dy", "-2em")
    .attr("dy", "-3em")
    .style("text-anchor", "end")
    .attr("transform", "rotate(-90)")
	.text("Happiness Score Average");
yAxisEl.call(yAxis);


let activities;
let circle, labeltext;

// Load data
const activitiesData = Promise.all([
    d3.tsv("data/act_means.tsv", d3.autoType)
]);
activitiesData.then(function(data) {
    
    activities = data[0].sort((a, b) => b.relwt - a.relwt);
    console.log(activities);
    
    // Initialize chart now that data is loaded.
    initChart();
});


function initChart() {
    // Circle for each node.
    circle = svg.append("g")
        .selectAll("circle")
        .data(activities)
        .join("circle")
        .attr("id", d => "circle"+d.activity)
        .attr("cx", d => x(d.meaning_mean))
        .attr("cy", d => y(d.schappy_mean))
        .attr("fill", ptcolor)
        .attr("fill-opacity", .75)
        .attr("r", d => r(d.relwt))
        .attr("stroke", "#fff")
        .attr("stroke-width", ".5px");
    
    setInteraction();
}



function setInteraction() {
    
    // Create label
    labeltext = svg.append("text")
        .attr("text-anchor", "middle");
    
    // Hover events
	circle.on("mouseover", function(e,d) {
        d3.selectAll(".current").classed("current", false);
        d3.select(this).classed("current", true);
        
        let curract = d3.select(this).datum();
        
        labeltext.text(curract.descrip)
            .attr("x", x(curract.meaning_mean))
            .attr("y", y(curract.schappy_mean)-r(curract.relwt)-5);
	})
    // .on("mousemove", function(e,d) {
    //     d3.select(this).classed("current", true);
    // })
	.on('mouseout', function(d) {
		d3.select(this).classed('current', false);
        labeltext.text('');
	}); // @end mouseover
    
}