package main

import (
	"net/http"

	chart "github.com/wcharczuk/go-chart"
)

func drawChart(res http.ResponseWriter, req *http.Request) {
	var b float64
	b = 1000

	ts1 := chart.ContinuousSeries{ //TimeSeries{
		Name:    "Time Series",
		Style:   chart.StyleShow(),
		XValues: []float64{10 * b, 20 * b, 30 * b, 40 * b, 50 * b, 60 * b, 70 * b, 80 * b},
		YValues: []float64{1.0, 2.0, 30.0, 4.0, 50.0, 6.0, 7.0, 88.0},
	}

	ts2 := chart.ContinuousSeries{ //TimeSeries{
		Style: chart.Style{
			Show:        true,
			StrokeColor: chart.GetDefaultColor(1),
		},

		XValues: []float64{10 * b, 20 * b, 30 * b, 40 * b, 50 * b, 60 * b, 70 * b, 80 * b},
		YValues: []float64{15.0, 52.0, 30.0, 42.0, 50.0, 26.0, 77.0, 38.0},
	}

	graph := chart.Chart{

		XAxis: chart.XAxis{
			Name:           "The XAxis",
			NameStyle:      chart.StyleShow(),
			Style:          chart.StyleShow(),
			ValueFormatter: chart.TimeMinuteValueFormatter, //TimeHourValueFormatter,
		},

		YAxis: chart.YAxis{
			Name:      "The YAxis",
			NameStyle: chart.StyleShow(),
			Style:     chart.StyleShow(),
		},

		Series: []chart.Series{
			ts1,
			ts2,
		},
	}

	res.Header().Set("Content-Type", "image/png")
	graph.Render(chart.PNG, res)
}

func main() {
	http.HandleFunc("/", drawChart)
	http.ListenAndServe(":8080", nil)
}