var echarts = require('echarts');

var ROOT_PATH = 'https://echarts.apache.org/examples';
var UP_COLOR = '#00da3c';
var DOWN_COLOR = '#ec0000';


$.get(ROOT_PATH + '/data/asset/data/stock-DJI.json', function (rawData) {
    var data = splitData(rawData);
    initTradeChart(elementID, data)
}


function splitData(rawData) {
    var categoryData = [];
    var values = [];
    var volumes = [];
    for (var i = 0; i < rawData.length; i++) {
        categoryData.push(rawData[i].splice(0, 1)[0]);
        values.push(rawData[i]);

        volumes.push([
            i,
            rawData[i][4],
            rawData[i][0] > rawData[i][1] ? 1 : -1
        ]);
    }

    return {
        categoryData: categoryData,
        values: values,
        volumes: volumes
    };
}

function calculateMovingAverage(dayCount, data) {
    var result = [];
    for (var i = 0, len = data.values.length; i < len; i++) {
        if (i < dayCount) {
            result.push('-');
            continue;
        }
        var sum = 0;
        for (var j = 0; j < dayCount; j++) {
            sum += data.values[i - j][1];
        }
        result.push(+(sum / dayCount).toFixed(3));
    }
    return result;
}

function initTradeChart(elementID, data) {
    var chartDom = document.getElementById(elementID);
    var myChart = echarts.init(chartDom);

    myChart.setOption({
        animation: false,
        tooltip: {
            trigger: 'axis',
            axisPointer: {
                type: 'cross'
            },
            borderWidth: 1,
            borderColor: '#ccc',
            padding: 10,
            textStyle: {
                color: '#000'
            },
            position: function (pos, params, el, elRect, size) {
                var obj = {top: 10};
                obj[['left', 'right'][+(pos[0] < size.viewSize[0] / 2)]] = 30;
                return obj;
            }
        },
        axisPointer: {
            link: {xAxisIndex: 'all'},
            label: {
                backgroundColor: '#777'
            }
        },
        visualMap: {
            show: false,
            seriesIndex: 1,
            dimension: 2,
            pieces: [{
                value: 1,
                color: DOWN_COLOR
            }, {
                value: -1,
                color: UP_COLOR
            }]
        },
        grid: [
            {
                left: '10%',
                right: '8%',
                height: '50%'
            },
            {
                left: '10%',
                right: '8%',
                top: '58%',
                height: '13%'
            }
        ],
        xAxis: [
            {
                type: 'category',
                data: data.categoryData,
                scale: true,
                boundaryGap: false,
                axisLine: {onZero: false},
                splitLine: {show: false},
                splitNumber: 20,
                min: 'dataMin',
                max: 'dataMax',
                axisPointer: {
                    z: 100
                }
            },
            {
                type: 'category',
                gridIndex: 1,
                data: data.categoryData,
                scale: true,
                boundaryGap: false,
                axisLine: {onZero: false},
                axisTick: {show: false},
                splitLine: {show: false},
                axisLabel: {show: false},
                splitNumber: 20,
                min: 'dataMin',
                max: 'dataMax'
            }
        ],
        yAxis: [
            {
                scale: true,
            },
            {
                scale: true,
                gridIndex: 1,
                splitNumber: 2,
                axisLabel: {show: false},
                axisLine: {show: false},
                axisTick: {show: false},
                splitLine: {show: false}
            }
        ],
        dataZoom: [
            {
                type: 'inside',
                xAxisIndex: [0, 1],
                start: 98,
                end: 100
            },
            {
                show: true,
                xAxisIndex: [0, 1],
                type: 'slider',
                top: '85%',
                start: 98,
                end: 100
            }
        ],
        series: [
            {
                name: 'Dow-Jones index',
                type: 'candlestick',
                data: data.values,
                itemStyle: {
                    color: UP_COLOR,
                    color0: DOWN_COLOR,
                    borderColor: null,
                    borderColor0: null
                },
                tooltip: {
                    formatter: function (param) {
                        param = param[0];
                        return [
                            'Date: ' + param.name + '<hr size=1 style="margin: 3px 0">',
                            'Open: ' + param.data[0] + '<br/>',
                            'Close: ' + param.data[1] + '<br/>',
                            'Lowest: ' + param.data[2] + '<br/>',
                            'Highest: ' + param.data[3] + '<br/>'
                        ].join('');
                    }
                }
            },
            {
                name: 'Volume',
                type: 'bar',
                xAxisIndex: 1,
                yAxisIndex: 1,
                data: data.volumes
            },
            {
                name: 'MA5',
                type: 'line',
                data: calculateMA(7, data),
                smooth: true,
                lineStyle: {
                    opacity: 0.5
                }
            },
            {
                name: 'MA20',
                type: 'line',
                data: calculateMA(20, data),
                smooth: true,
                lineStyle: {
                    opacity: 0.5
                }
            },
            {
                name: 'MA50',
                type: 'line',
                data: calculateMA(50, data),
                smooth: true,
                lineStyle: {
                    opacity: 0.5
                }
            },
        ]
    }, true);
});