package cmd

import (
	"errors"

	"github.com/mudler/edgevpn/pkg/edgevpn"
	"github.com/urfave/cli"
)

func cliNameAddress(c *cli.Context) (name, address string, err error) {
	name = c.Args().Get(0)
	address = c.Args().Get(1)
	if name == "" && c.String("name") == "" {
		err = errors.New("Either a file UUID as first argument or with --name needs to be provided")
		return
	}
	if address == "" && c.String("address") == "" {
		err = errors.New("Either a file UUID as first argument or with --name needs to be provided")
		return
	}
	if c.String("name") != "" {
		name = c.String("name")
	}
	if c.String("address") != "" {
		address = c.String("address")
	}
	return name, address, nil
}

func ServiceAdd() cli.Command {
	return cli.Command{
		Name:    "service-add",
		Aliases: []string{"sa"},
		Usage:   "Expose a service to the network without creating a VPN",
		Description: `Expose a local or a remote endpoint connection as a service in the VPN. 
		The host will act as a proxy between the service and the connection`,
		UsageText: "edgevpn service-add unique-id ip:port",
		Flags: append(CommonFlags,
			cli.StringFlag{
				Name:  "virtual-ip",
				Usage: `VirtualIP for the service inside the VPN network. For example 10.1.0.10:90`,
			},
			cli.StringFlag{
				Name:  "name",
				Usage: `Unique name of the service to be server over the network.`,
			},
			cli.StringFlag{
				Name: "address",
				Usage: `Remote address that the service is running to. That can be a remote webserver, a local SSH server, etc.
For example, '192.168.1.1:80', or '127.0.0.1:22'.`,
			},
		),
		Action: func(c *cli.Context) error {
			name, address, err := cliNameAddress(c)
			if err != nil {
				return err
			}
			e := edgevpn.New(cliToOpts(c)...)

			displayStart(e)

			ledger, err := e.Ledger()
			if err != nil {
				return err
			}

			// Join the node to the network, using our ledger
			e.ExposeService(ledger, name, c.String("virtual-ip"), address)
			// Join the node to the network, using our ledger
			if err := e.Join(); err != nil {
				return err
			}

			for {
			}
		},
	}
}

func ServiceConnect() cli.Command {
	return cli.Command{
		Aliases: []string{"sc"},
		Usage:   "Connects to a service in the network without creating a VPN",
		Name:    "service-connect",
		Description: `Bind a local port to connect to a remote service in the network.
Creates a local listener which connects over the service in the network without creating a VPN.
`,
		UsageText: "edgevpn service-connect unique-id (ip):port",
		Flags: append(CommonFlags,
			cli.StringFlag{
				Name:  "name",
				Usage: `Unique name of the service in the network.`,
			},
			cli.StringFlag{
				Name: "address",
				Usage: `Address where to bind locally. E.g. ':8080'. A proxy will be created
to the service over the network`,
			},
		),
		Action: func(c *cli.Context) error {
			name, address, err := cliNameAddress(c)
			if err != nil {
				return err
			}
			e := edgevpn.New(cliToOpts(c)...)

			displayStart(e)

			// Join the node to the network, using our ledger
			if err := e.Join(); err != nil {
				return err
			}

			ledger, _ := e.Ledger()
			return e.ConnectToService(ledger, name, address)
		},
	}
}