package cmd

import (
	"context"
	"fmt"
	"os/user"
	"time"

	"github.com/spf13/cobra"

	"github.com/netbirdio/netbird/client/proto"
	nbstatus "github.com/netbirdio/netbird/client/status"
)

var logoutCmd = &cobra.Command{
	Use:     "deregister",
	Aliases: []string{"logout"},
	Short:   "Deregister from the NetBird management service and delete this peer",
	Long:    "This command will deregister the current peer from the NetBird management service and all associated configuration. Use with caution as this will remove the peer from the network.",
	RunE: func(cmd *cobra.Command, args []string) error {
		SetFlagsFromEnvVars(rootCmd)

		cmd.SetOut(cmd.OutOrStdout())

		ctx, cancel := context.WithTimeout(cmd.Context(), time.Second*15)
		defer cancel()

		conn, err := DialClientGRPCServer(ctx, daemonAddr)
		if err != nil {
			return fmt.Errorf("connect to daemon: %v", err)
		}
		defer conn.Close()

		daemonClient := proto.NewDaemonServiceClient(conn)

		req := &proto.LogoutRequest{}

		if profileName != "" {
			req.ProfileName = &profileName

			currUser, err := user.Current()
			if err != nil {
				return fmt.Errorf("get current user: %v", err)
			}
			username := currUser.Username
			req.Username = &username
		}

		if _, err := daemonClient.Logout(ctx, req); err != nil {
			return fmt.Errorf("deregister: %v", err)
		}

		out := &nbstatus.DeregisterOutput{
			Status:      "deregistered",
			ProfileName: profileName,
		}
		switch {
		case jsonFlag:
			s, err := out.JSON()
			if err != nil {
				return err
			}
			cmd.Println(s)
		case yamlFlag:
			s, err := out.YAML()
			if err != nil {
				return err
			}
			cmd.Print(s)
		default:
			cmd.Println("Deregistered successfully")
		}
		return nil
	},
}

func init() {
	logoutCmd.PersistentFlags().StringVar(&profileName, profileNameFlag, "", profileNameDesc)
	logoutCmd.PersistentFlags().BoolVarP(&jsonFlag, "json", "j", false, "display command result in json format")
	logoutCmd.PersistentFlags().BoolVarP(&yamlFlag, "yaml", "y", false, "display command result in yaml format")
	logoutCmd.MarkFlagsMutuallyExclusive("json", "yaml")
}