package fortop

import (
	"encoding/xml"
	"net/http"
	"strconv"
	"time"

	"git.fuyu.moe/5GPowerQuality/parser/data"
	"golang.org/x/net/html/charset"
)

var start time.Time

func FetchData() {
	if start.IsZero() {
		start = data.GetStartDate(data.SourceFortop)
	}

	end := start.Add(time.Hour)

	resp := getFortopData(start, end)

	sets := data.Sets{}
	for _, meter := range resp {
		mID := data.GetMeterID(data.SourceFortop, meter.MeterID)

		for _, v := range meter.Meetwaarde {
			valName := v.Naam

			for _, r := range v.Range {
				key := data.Key{Meter: mID, Time: time.Time(r.Date)}
				if _, ok := sets[key]; !ok {
					sets[key] = data.Set{}
				}

				sets[key][valName] = r.Value
			}
		}
	}

	data.InsertSets(sets)

	if end.Before(time.Now()) {
		start = end.Add(time.Second)
		return
	}

	time.Sleep(time.Minute)
	start = data.GetStartDate(data.SourceFortop)
}

func getFortopData(startDate, endDate time.Time) []Meter {
	url := `https://energy4all.energyportal.online/index?p5g=S_1_` + strconv.FormatInt(startDate.Unix(), 10) + `_` + strconv.FormatInt(endDate.Unix(), 10)
	resp, err := http.Get(url)
	if err != nil {
		panic(err)
	}
	if resp.StatusCode != 200 {
		panic(`Got status code:` + strconv.Itoa(resp.StatusCode))
	}

	decoder := xml.NewDecoder(resp.Body)
	decoder.CharsetReader = charset.NewReaderLabel

	var data FortopFormat
	err = decoder.Decode(&data)
	if err != nil {
		panic(err)
	}

	return data.Trafo.Meter
}