package main

import (
	"fwh-toolbox-server/utils/echart"
	"math/rand"
	"os"
	"time"

	"github.com/go-echarts/go-echarts/v2/opts"
)

// 生成时间-数据序列
func generateLineItems() []opts.LineData {
	items := make([]opts.LineData, 0)
	now := time.Now()

	for i := 0; i < 10; i++ {
		// 随机值范围 -300 ~ +300
		value := rand.Intn(600) - 300

		items = append(items, opts.LineData{
			Value: []interface{}{
				now.Add(time.Duration(i) * time.Hour).Format(time.DateTime),
				value,
			},
		})
	}

	return items
}

func main() {
	var data []echart.LineChartData = []echart.LineChartData{}
	data = append(data, echart.LineChartData{
		Legend: "A",
		Data:   generateLineItems(),
	})
	data = append(data, echart.LineChartData{
		Legend: "B",
		Data:   generateLineItems(),
	})
	data = append(data, echart.LineChartData{
		Legend: "C",
		Data:   generateLineItems(),
	})
	data = append(data, echart.LineChartData{
		Legend: "D",
		Data:   generateLineItems(),
	})

	lineOpt := echart.LineChartOpt{
		Global: echart.ChartOpt{
			Title: "功率流图",
		},
		Smooth: true,
	}

	line := echart.LineSmoothArea(lineOpt, data)
	f, _ := os.Create("line.html")
	defer f.Close()
	line.Render(f)
}