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<html>
    <head>
        <meta charset="utf-8">
        <script src="lib/esl.js"></script>
        <script src="lib/config.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="lib/testHelper.js"></script>
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <link rel="stylesheet" href="lib/reset.css" />
    </head>
    <body>
        <style>
            h1 {
                line-height: 60px;
                height: 60px;
                background: #ddd;
                text-align: center;
                font-weight: bold;
                font-size: 14px;
            }
            .test-chart {
                height: 500px;
                margin: 10px auto;
            }
        </style>


        <h1>Hexagonal Binning</h1>
        <div class="chart" id="hexagonal-binning"></div>


        <script>
            // Hexbin statistics code based on [d3-hexbin](https://github.com/d3/d3-hexbin)
            function hexBinStatistics(points, r) {
                var dx = r * 2 * Math.sin(Math.PI / 3)
                var dy = r * 1.5;
                var binsById = {};
                var bins = [];

                for (var i = 0, n = points.length; i < n; ++i) {
                    var point = points[i];
                    var px = point[0];
                    var py = point[1];

                    if (isNaN(px) || isNaN(py)) {
                        continue;
                    }

                    var pj = Math.round(py = py / dy);
                    var pi = Math.round(px = px / dx - (pj & 1) / 2);
                    var py1 = py - pj;

                    if (Math.abs(py1) * 3 > 1) {
                        var px1 = px - pi;
                        var pi2 = pi + (px < pi ? -1 : 1) / 2;
                        var pj2 = pj + (py < pj ? -1 : 1);
                        var px2 = px - pi2;
                        var py2 = py - pj2;
                        if (px1 * px1 + py1 * py1 > px2 * px2 + py2 * py2) {
                            pi = pi2 + (pj & 1 ? 1 : -1) / 2;
                            pj = pj2;
                        }
                    }

                    var id = pi + "-" + pj;
                    var bin = binsById[id];
                    if (bin) {
                        bin.points.push(point);
                    }
                    else {
                        bins.push(bin = binsById[id] = {points: [point]});
                        bin.x = (pi + (pj & 1) / 2) * dx;
                        bin.y = pj * dy;
                    }
                }

                var maxBinLen = -Infinity
                for (var i = 0; i < bins.length; i++) {
                    maxBinLen = Math.max(maxBinLen, bins.length);
                }

                return {
                    maxBinLen: maxBinLen,
                    bins: bins
                };
            }

        </script>


        <script>
            require([
                'echarts'
                // 'echarts/chart/custom',
                // 'echarts/chart/bar',
                // 'echarts/component/title',
                // 'echarts/component/geo',
                // 'echarts/component/legend',
                // 'echarts/component/tooltip',
                // 'echarts/component/visualMap',
                // 'echarts/component/dataZoom',
                // 'zrender/vml/vml'
            ], function (echarts) {

                // 2006-2007 Regular Season

                $.getJSON('./data/kawhi-leonard-16-17-regular.json', function (shotData) {
                    $.getJSON('./data/nba-court.json', function (nbaCourt) {

                        echarts.registerMap('nbaCourt', nbaCourt.borderGeoJSON);

                        var backgroundColor = '#333';
                        var hexagonRadiusInGeo = 1;

                        var hexBinResult = hexBinStatistics(
                            echarts.util.map(shotData.data, function (item) {
                                // "shot_made_flag" made missed
                                var made = item[echarts.util.indexOf(shotData.schema, 'shot_made_flag')];
                                return [
                                    item[echarts.util.indexOf(shotData.schema, 'loc_x')],
                                    item[echarts.util.indexOf(shotData.schema, 'loc_y')],
                                    made === 'made' ? 1 : 0
                                ];
                            }),
                            hexagonRadiusInGeo
                        );

                        var data = echarts.util.map(hexBinResult.bins, function (bin) {
                            var made = 0;
                            echarts.util.each(bin.points, function (point) {
                                made += point[2];
                            });
                            return [bin.x, bin.y, bin.points.length, (made / bin.points.length * 100).toFixed(2)];
                        });

                        function createItemRenderer(type) {
                            type = type || 'polygon';
                            return function renderItemHexBin(params, api) {
                                var center = api.coord([api.value(0), api.value(1)]);
                                var points = [];
                                var pointsBG = [];

                                var maxViewRadius = api.size([hexagonRadiusInGeo, 0])[0];
                                var minViewRadius = Math.min(maxViewRadius, 4);
                                var extentMax = Math.log(Math.sqrt(hexBinResult.maxBinLen));
                                var viewRadius = echarts.number.linearMap(
                                    Math.log(Math.sqrt(api.value(2))),
                                    [0, extentMax],
                                    [minViewRadius, maxViewRadius]
                                );

                                var angle = Math.PI / 6;
                                for (var i = 0; i < 6; i++, angle += Math.PI / 3) {
                                    points.push([
                                        center[0] + viewRadius * Math.cos(angle),
                                        center[1] + viewRadius * Math.sin(angle)
                                    ]);
                                    pointsBG.push([
                                        center[0] + maxViewRadius * Math.cos(angle),
                                        center[1] + maxViewRadius * Math.sin(angle)
                                    ]);
                                }

                                return {
                                    type: 'group',
                                    children: [{
                                        type,
                                        morph: true,
                                        shape: type === 'polygon' ? {
                                            points: points
                                        } : {
                                            // Circle
                                            cx: center[0],
                                            cy: center[1],
                                            r: viewRadius
                                        },
                                        style: {
                                            stroke: '#ccc',
                                            fill: api.visual('color'),
                                            lineWidth: 0
                                        }
                                    }, {
                                        type,
                                        morph: true,
                                        shape: type === 'polygon' ? {
                                            points: pointsBG
                                        } : {
                                            // Circle
                                            cx: center[0],
                                            cy: center[1],
                                            r: maxViewRadius
                                        },
                                        style: {
                                            stroke: null,
                                            fill: 'rgba(0,0,0,0.5)',
                                            lineWidth: 0
                                        },
                                        z2: -19
                                    }]
                                };
                            };
                        }

                        function renderItemNBACourt(param, api) {
                            return {
                                type: 'group',
                                children: echarts.util.map(nbaCourt.geometry, function (item) {
                                    return {
                                        type: item.type,
                                        style: {
                                            stroke: '#aaa',
                                            fill: null,
                                            lineWidth: 1.5
                                        },
                                        shape: {
                                            points: echarts.util.map(item.points, api.coord)
                                        }
                                    };
                                })
                            };
                        }

                        var option = {
                            backgroundColor: backgroundColor,
                            aria: {
                                show: true
                            },
                            tooltip: {
                                backgroundColor: 'rgba(255,255,255,0.9)',
                                textStyle: {
                                    color: '#333'
                                }
                            },
                            title: {
                                text: 'Kawhi Leonard',
                                subtext: '2016-2017 Regular Season',
                                backgroundColor: backgroundColor,
                                top: 10,
                                left: 10,
                                textStyle: {
                                    color: '#eee'
                                }
                            },
                            legend: {
                                data: ['bar', 'error']
                            },
                            geo: {
                                left: 0,
                                right: 0,
                                top: 0,
                                bottom: 0,
                                roam: true,
                                silent: true,
                                itemStyle: {
                                    normal: {
                                        color: backgroundColor,
                                        borderWidth: 0
                                    }
                                },
                                map: 'nbaCourt'
                            },
                            visualMap: {
                                type: 'continuous',
                                orient: 'horizontal',
                                right: 30,
                                top: 40,
                                min: 0,
                                max: 100,
                                align: 'bottom',
                                text: [null, 'FG:   '],
                                dimension: 3,
                                seriesIndex: 0,
                                calculable: true,
                                textStyle: {
                                    color: '#eee'
                                },
                                formatter: '{value} %',
                                inRange: {
                                    // color: ['rgba(241,222,158, 0.3)', 'rgba(241,222,158, 1)']
                                    color: ['green', 'yellow']
                                }
                            },
                            series: [{
                                type: 'custom',
                                coordinateSystem: 'geo',
                                geoIndex: 0,
                                renderItem: createItemRenderer(),
                                dimensions: [null, null, 'Field Goals Attempted (hexagon size)', 'Field Goal Percentage (color)'],
                                encode: {
                                    tooltip: [2, 3]
                                },
                                data: data
                            }, {
                                coordinateSystem: 'geo',
                                type: 'custom',
                                geoIndex: 0,
                                renderItem: renderItemNBACourt,
                                silent: true,
                                data: [0]
                            }]
                        };

                        // var width = 1000;
                        const myChart = testHelper.create(echarts, 'hexagonal-binning', {
                            option,
                            buttons: [{
                                text: 'Hexgon',
                                onClick: function() {
                                    myChart.setOption({
                                        series: [{
                                            type: 'custom',
                                            renderItem: createItemRenderer('polygon')
                                        }]
                                    });
                                }
                            }, {
                                text: 'Circle',
                                onClick: function() {
                                    myChart.setOption({
                                        series: [{
                                            type: 'custom',
                                            renderItem: createItemRenderer('circle')
                                        }]
                                    });
                                }
                            }]
                            // width: width,
                            // height: width * nbaCourt.height / nbaCourt.width
                        });
                    });
                });
            });
        </script>


    </body>
</html>