package main

import (
	"encoding/xml"
	"strconv"
	"time"
)

// FortopFormat ..
type FortopFormat struct {
	XMLName xml.Name `xml:"Trafo-Details"`
	Trafo   struct {
		TrafoNummer int     `xml:"trafonummer"`
		Meter       []Meter `xml:"meter"`
	} `xml:"trafo"`
}

// Meter contains all data from one specific meter
type Meter struct {
	MeterID    string        `xml:"meter-id"`
	StartDate  UnixTimestamp `xml:"startdate"`
	EndDate    UnixTimestamp `xml:"enddate"`
	Meetwaarde []Meetwaarde  `xml:"meetwaarde"`
}

// Meetwaarde contains the data that is not pointless garbage
type Meetwaarde struct {
	Naam  string  `xml:"naam"`
	Range []Range `xml:"range"`
}

// Range is a single set of data
type Range struct {
	Date  UnixTimestamp `xml:"date"`
	Value float64       `xml:"value"`
}

// UnixTimestamp is a time.Time that can parse unix timestamps
type UnixTimestamp time.Time

// UnmarshalText implements encoding.TextUnmarshaler
func (t *UnixTimestamp) UnmarshalText(b []byte) error {
	i, err := strconv.ParseInt(string(b), 10, 64)
	if err != nil {
		return err
	}
	*t = UnixTimestamp(time.Unix(i, 0))
	return nil
}

func (t UnixTimestamp) String() string {
	return time.Time(t).Format(`2006-01-02 15:04`)
}

// Sets are multiple sets of date
type Sets map[time.Time]Set

// Set is a set of data
type Set map[string]float64