package botlib

import (
	"errors"
	"os/exec"
)

type MessageType int

const (
	MessageRequest  = 1
	MessageResponse = 2
)

type InputPair struct {
	Param    string `json:"param"`
	Argument string `json:"argument"`
}

type Message struct {
	Type     MessageType `json:"type"`
	Inputs   []InputPair `json:"inputs"`
	Sender   string      `json:"sender"`
	Receiver string      `json:"receiver"`
	Body     string      `json:"body"`
}

func Knock(name string) error {
	path, exists := Registry[name]
	if !exists {
		return errors.New("Unknown knock target")
	}
	/*knock_msg := Message{
		Type:     MessageRequest,
		Sender:   "One-Who-Knocks",
		Receiver: name,
	}*/
	if path.Hostname() == "localhost" || path.Hostname() == "127.0.0.1" {
		//Local delivery
		if path.EscapedPath() == "" {
			if path.Port() == "" {
				//no path means it's not a binary but no port means it's not listening
				//invalid, can't knock
				return errors.New("Can't knock, invalid URL")
			} else {
				//no path but port, local network connection
				return errors.New("Unsupposed: Local network") //TODO
			}
		} else {
			//path on localhost means local bin file
			binpath := path.EscapedPath()
			cmd := exec.Command(binpath)
			err := cmd.Run()
			if err != nil {
				return err
			}
		}
	} else {
		return errors.New("Network messaging not supported yet")
	}
	return nil
}