package main

import (
	"fmt"
	"log"
	"os"

	ocpp16 "github.com/lorenzodonini/ocpp-go/ocpp1.6"
	"github.com/lorenzodonini/ocpp-go/ocpp1.6/core"
	"github.com/lorenzodonini/ocpp-go/ocpp1.6/firmware"
	"github.com/lorenzodonini/ocpp-go/ocpp1.6/localauth"
	"github.com/lorenzodonini/ocpp-go/ocpp1.6/remotetrigger"
	"github.com/lorenzodonini/ocpp-go/ocpp1.6/reservation"
	"github.com/lorenzodonini/ocpp-go/ocpp1.6/smartcharging"
	"github.com/lorenzodonini/ocpp-go/ocpp1.6/types"
	"github.com/lorenzodonini/ocpp-go/ocppj"
	"github.com/lorenzodonini/ocpp-go/ws"
	"github.com/spf13/cobra"
)

var chargePointId = "cp0001"

// ocppCmd represents the base command when called without any subcommands
var ocppCmd = &cobra.Command{
	Use:  "ocpp",
	Run:  runOcpp,
	Args: cobra.MaximumNArgs(1),
}

func main() {
	ocppCmd.Flags().String("uri", "ws://localhost:8887", "Central system uri")

	if err := ocppCmd.Execute(); err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
}

func runOcpp(cmd *cobra.Command, args []string) {
	url := cmd.Flags().Lookup("uri").Value.String()

	if len(args) > 0 {
		chargePointId = args[0]
	}

	// create websocket client
	client := ws.NewClient()
	client.SetRequestedSubProtocol(types.V16Subprotocol)

	// create chargepoint with connection tracking
	endpoint := ocppj.NewClient(chargePointId, client, nil, nil, core.Profile, localauth.Profile, firmware.Profile, reservation.Profile, remotetrigger.Profile, smartcharging.Profile)
	endpoint.SetOnReconnectedHandler(func() {
		fmt.Println("reconnect")
	})
	endpoint.SetOnDisconnectedHandler(func(err error) {
		fmt.Println("disconnect")
	})
	chargePoint := ocpp16.NewChargePoint(chargePointId, endpoint, client)

	// set a handler for all callback functions
	handler := &ChargePointHandler{triggerC: make(chan remotetrigger.MessageTrigger, 1)}
	chargePoint.SetCoreHandler(handler)
	chargePoint.SetRemoteTriggerHandler(handler)

	go func() {
		for err := range chargePoint.Errors() {
			fmt.Println(err)
		}
	}()

	go func() {
		for msg := range handler.triggerC {
			switch msg {
			case core.BootNotificationFeatureName:
				if res, err := chargePoint.BootNotification("demo", "evcc"); err != nil {
					log.Println("BootNotification:", err)
				} else {
					log.Println("BootNotification:", res)
				}

			case core.StatusNotificationFeatureName:
				if res, err := chargePoint.StatusNotification(1, core.NoError, core.ChargePointStatusAvailable); err != nil {
					log.Println("StatusNotification:", err)
				} else {
					log.Println("StatusNotification:", res)
				}

			case core.MeterValuesFeatureName:
				if res, err := chargePoint.MeterValues(1, []types.MeterValue{
					{SampledValue: []types.SampledValue{
						{Measurand: types.MeasurandPowerActiveImport, Value: "1000"},
					}},
				}); err != nil {
					log.Println("MeterValues:", err)
				} else {
					log.Println("MeterValues:", res)
				}

			default:
				fmt.Println(msg)
			}
		}
	}()

	// Connects to central system
	if err := chargePoint.Start(url); err != nil {
		log.Fatal(err)
	}

	log.Printf("connected to central system at %v", url)

	select {}
}