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<!DOCTYPE html>
<meta charset="utf-8">

<!-- Load d3.js -->
<script src="https://d3js.org/d3.v6.js"></script>
<link rel="stylesheet" href="style.css">

<!-- Create a div for the header -->
<div id="my_header" style="text-align: center;">
    <h1>Networks Graph for Top 100 BoardGames from BoardGameGeek.xom</h1>
<!--     <p>Legenda:</p>
    <ul style="list-style: none; text-align: left;">
        <li><span style="color: #ffffb2;">●</span> 0-5 collegamenti</li>
        <li><span style="color: #fecc5c;">●</span> 6-10 collegamenti</li>
        <li><span style="color: #fd8d3c;">●</span> 11-15 collegamenti</li>
        <li><span style="color: #f03b20;">●</span> 16-20 collegamenti</li>
        <li><span style="color: #bd0026;">●</span> 21+ collegamenti</li>
    </ul> -->
</div>

<!-- Create a div where the graph will take place -->
<div id="my_dataviz"></div>


<body>
    <script>

        // set the dimensions and margins of the graph
        const margin = { top: 10, right: 30, bottom: 30, left: 40 },
            width = window.innerWidth - margin.left - margin.right,
            height = window.innerHeight - margin.top - margin.bottom;

        // Create a zoomable SVG element
        const svg = d3.select("#my_dataviz")
            .append("svg")
            .attr("width", width + margin.left + margin.right)
            .attr("height", height + margin.top + margin.bottom)
            .call(d3.zoom().on("zoom", function (event) {
                svg.attr("transform", event.transform);
            }))
            .append("g")
            .attr("transform",
                `translate(${margin.left}, ${margin.top})`);




        d3.json("output.json").then(function (data) {

            const nodeMap = {};
            data.nodes.forEach(node => {
                const connectedNodes = data.links.filter(link => link.source == node.id || link.target == node.id)
                    .map(link => link.source == node.id ? link.target : link.source);
                const connectedNodeNames = data.nodes.filter(node => connectedNodes.includes(node.id))
                    .map(node => node.name);
                nodeMap[node.id] = connectedNodeNames;
            });


            // Define arrow marker
            svg.append("defs").append("marker")
                .attr("id", "arrow")
                .attr("viewBox", "0 -5 10 10")
                .attr("refX", 25)
                .attr("refY", 0)
                .attr("markerWidth", 10)
                .attr("markerHeight", 13)
                .attr("orient", "auto")
                .append("path")
                .attr("d", "M0,-5L10,0L0,5")
                .style("fill", "#9999");

            // Define arrow marker
            svg.append("defs").append("marker")
                .attr("id", "arrow-red")
                .attr("viewBox", "0 -5 10 10")
                .attr("refX", 35)
                .attr("refY", 0)
                .attr("markerWidth", 10)
                .attr("markerHeight", 13)
                .attr("orient", "auto")
                .append("path")
                .attr("d", "M0,-5L10,0L0,5")
                .style("fill", "red");


            // Initialize the links
            const link = svg
                .selectAll("line")
                .data(data.links)
                .join("line")
                .style("stroke", "#999")
                .attr("marker-end", "url(#arrow)");


            // Create a color scale
            const colorScale = d3.scaleQuantize()
                .domain([0, d3.max(data.nodes, function (d) {
                    // Get number of links for this node
                    return data.links.filter(link => link.source == d.id || link.target == d.id).length;
                })])
                .range(["#ffffb2", "#fecc5c", "#fd8d3c", "#f03b20", "#bd0026"]);


            // Definisci il tooltip
            var tip = d3.select("#my_dataviz").append("div")
                .attr("class", "tooltip")
                .style("opacity", 0)

            // Define a pattern for each node
            const patterns = svg
                .selectAll("pattern")
                .data(data.nodes)
                .join("pattern")
                .attr("id", d => `pattern-${d.id}`)
                .attr("width", 1)
                .attr("height", 1)
                .append("image")
                .attr("xlink:href", d => d.image)
                .attr("width", 100)
                .attr("height", 100)
                .attr("x", -12.5)
                .attr("y", -23);

            // Initialize the nodes
            const node = svg
                .selectAll("circle")
                .data(data.nodes)
                .join("circle")
                .attr("r", 35)
                .style("fill", d => `url(#pattern-${d.id})`)
                /* .style("fill", function (d) {
                    // Get number of links for this node
                    const numLinks = data.links.filter(link => link.source == d.id || link.target == d.id).length;
                    // Set fill color based on number of links
                    return colorScale(numLinks)
                }) */
                .attr("xlink:href", function (d) {
                    return d.image;
                })
                .on("click", function (event, d) {
                    // Find connected nodes
                    const connectedNodes = nodeMap[d.id];
                    // Show tooltip with connected node names
                    alert('Connected nodes: \n' + connectedNodes.join(" \n "));
                    console.log(connectedNodes)
                })
                .on("mousemove", function (event) {
                    var mouseX = event.clientX;
                    var mouseY = event.clientY;
                    tip.style("left", (mouseX + 10) + "px")
                        .style("top", (mouseY + 100) + "px")

                })
                .on("mouseover", (event, d) => {
                    var mouseX = event.clientX;
                    var mouseY = event.clientY;
                    const connectedNodes = nodeMap[d.id];
                    console.log("ao" + connectedNodes)
                    d3.select(event.currentTarget)
                        .transition()
                        .duration(2000)
                        .style("stroke", "red")
                        .style("stroke-width", 2);
                    tip.style("opacity", 1)
                        .html('<br> Selected Game: ' + "<span style='color:green'>" + d.name + "</span>" +
                            '<br> Related games: <br>' + connectedNodes.join(" - \n "))
                        .style("top", (mouseY + 50) + "px");
                    link.filter(function (l) {
                        return l.source === d || l.target === d;
                    }).transition().duration(200).style("stroke", "red")
                        .attr("marker-end", "url(#arrow-red)");

                })
                .on("mouseout", (event, d) => {
                    tip.style("opacity", 0);
                    d3.select(event.currentTarget)
                        .transition()
                        .duration(2000)
                        .style("stroke", "none");
                    link.filter(function (l) {
                        return l.source === d || l.target === d;
                    }).transition().duration(2000).style("stroke", "#999")
                        .attr("marker-end", "url(#arrow)");
                });

            node.append("svg:image")
                .attr("xlink:href", function (d) {
                    return d.image;
                })
                .attr("x", -25)
                .attr("y", -25)
                .attr("width", 50)
                .attr("height", 50);

            // Add labels to the nodes
            const label = svg
                .selectAll("text")
                .data(data.nodes)
                .join("text")
                .attr("dx", 10)
                .attr("dy", ".35em")
                .style("font-size", 11)
                .text(function (d) { return d.name });

            // Let's list the force we wanna apply on the network
            const simulation = d3.forceSimulation(data.nodes)                 // Force algorithm is applied to data.nodes
                .force("link", d3.forceLink()                               // This force provides links between nodes
                    .id(function (d) { return d.id; })                     // This provide  the id of a node
                    .links(data.links)                                    // and this the list of links
                )
                .force("charge", d3.forceManyBody().strength(-2000))         // This adds repulsion between nodes. Play with the -400 for the repulsion strength
                .force("center", d3.forceCenter(width / 2, height / 2))     // This force attracts nodes to the center of the svg area
                .on("end", ticked);

            // This function is run at each iteration of the force algorithm, updating the nodes position.
            function ticked() {
                link
                    .attr("x1", function (d) { return d.source.x; })
                    .attr("y1", function (d) { return d.source.y; })
                    .attr("x2", function (d) { return d.target.x; })
                    .attr("y2", function (d) { return d.target.y; });

                node
                    .attr("cx", function (d) { return d.x; })
                    .attr("cy", function (d) { return d.y; });

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

            }
            console.log(data.links)
        });
    </script>
</body>