package main

import (
	"github.com/go-echarts/go-echarts/v2/charts"
	"github.com/go-echarts/go-echarts/v2/opts"
	"math/rand"
	"os"
)

// generate random data for line chart
func generateLineItems2() []opts.LineData {
	items := make([]opts.LineData, 0)
	for i := 0; i < 7; i++ {
		items = append(items, opts.LineData{Value: rand.Intn(300)})
	}
	return items
}

func main() {
	// 1.New 一个折线图对象
	line := charts.NewLine()
	// 2.设置 标题 和 子标题
	line.SetGlobalOptions(charts.WithTitleOpts(opts.Title{
		Title:    "业务费/能量值消费趋势",
		//Subtitle: "It's extremely easy to use, right?",
	}))

	// 3.设置 数据组
	line.SetXAxis([]string{"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"}).
		AddSeries("Category A", generateLineItems2()).
		AddSeries("Category B", generateLineItems2()).
		SetSeriesOptions(charts.WithLineChartOpts(opts.LineChart{Smooth: true}))

	// 4.绘图 生成html
	//f, _ := os.Create("lines.html")
	f, _ := os.Create("lines.png")
	line.Render(f)
}