package session

import (
	"time"

	"github.com/evcc-io/evcc/util/export"
)

// Session is a single charging session
type Session struct {
	ID                   uint           `json:"id" csv:"-" gorm:"primarykey"`
	Created              time.Time      `json:"created"`
	Finished             time.Time      `json:"finished"`
	Loadpoint            string         `json:"loadpoint"`
	Identifier           string         `json:"identifier"`
	Vehicle              string         `json:"vehicle"`
	Odometer             *float64       `json:"odometer" format:"int"`
	MeterStart           *float64       `json:"meterStart" csv:"Meter Start (kWh)" gorm:"column:meter_start_kwh"`
	MeterStop            *float64       `json:"meterStop" csv:"Meter Stop (kWh)" gorm:"column:meter_end_kwh"`
	ChargedEnergy        float64        `json:"chargedEnergy" csv:"Charged Energy (kWh)" gorm:"column:charged_kwh"`
	ChargeDuration       *time.Duration `json:"chargeDuration" csv:"Charge Duration" gorm:"column:charge_duration"`
	SocStart             *float64       `json:"socStart" csv:"SoC Start (%)" gorm:"column:soc_start" format:"int"`
	SocEnd               *float64       `json:"socEnd" csv:"SoC End (%)" gorm:"column:soc_end" format:"int"`
	AddedRange           *float64       `json:"addedRange" csv:"Added Range (km)" gorm:"column:added_range" format:"int"`
	SolarPercentage      *float64       `json:"solarPercentage" csv:"Solar (%)" gorm:"column:solar_percentage"`
	Price                *float64       `json:"price" csv:"Price" gorm:"column:price"`
	PricePerKWh          *float64       `json:"pricePerKWh" csv:"Price/kWh" gorm:"column:price_per_kwh"`
	Co2PerKWh            *float64       `json:"co2PerKWh" csv:"CO2/kWh (gCO2eq)" gorm:"column:co2_per_kwh"`
	ReferencePricePerKWh *float64       `json:"referencePricePerKWh" csv:"Reference Price/kWh" gorm:"column:reference_price_per_kwh"`
	ReferenceCo2PerKWh   *float64       `json:"referenceCo2PerKWh" csv:"Reference CO2/kWh (gCO2eq)" gorm:"column:reference_co2_per_kwh"`
}

// Sessions is a list of sessions
type Sessions []Session

var _ export.Writer = (*Sessions)(nil)

// Write implements the export.Writer interface
func (t *Sessions) Write(ww export.RowWriter) error {
	return export.WriteStructSlice(ww, t, export.Config{
		I18nPrefix: "sessions.csv",
	})
}