package main

import (
	"io/ioutil"
	"log"
	"os"
	"os/exec"
	"os/signal"
	"path/filepath"
	"runtime"
	"strings"
	"syscall"

	"imuslab.com/WsTTY/mod/aroz"
)

var (
	handler *aroz.ArozHandler
)

func SetupCloseHandler() {
	c := make(chan os.Signal, 2)
	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
	go func() {
		<-c
		log.Println("\r- Shutting down WsTTY Service.")

		os.Exit(0)
	}()
}

func main() {
	//Start the aoModule pipeline (which will parse the flags as well). Pass in the module launch information
	handler = aroz.HandleFlagParse(aroz.ServiceInfo{
		Name:        "WsTTY",
		Desc:        "arozos Websocket Terminal",
		Group:       "System Tools",
		IconPath:    "SystemAO/wstty/img/small_icon.png",
		Version:     "1.0",
		StartDir:    "wstty/",
		SupportFW:   true,
		LaunchFWDir: "wstty/",
		InitFWSize:  []int{740, 500},
	})

	SetupCloseHandler()

	//Start the gotty and rproxy it to the main system

	if runtime.GOOS == "windows" {
		//Not supported, and this should not be compiled to windows binary
		panic("Not supported platform")

	}

	absolutePath := ""
	if runtime.GOARCH == "amd64" {
		abs, _ := filepath.Abs("./gotty/gotty_linux_amd64")
		absolutePath = abs
	} else if runtime.GOARCH == "arm" {
		abs, _ := filepath.Abs("./gotty/gotty_linux_arm")
		absolutePath = abs
	} else if runtime.GOARCH == "arm64" {
		abs, _ := filepath.Abs("./gotty/ggotty_linux_arm64")
		absolutePath = abs
	} else {
		//Unsupported platform. Default use amd64
		abs, _ := filepath.Abs("./gotty/gotty_linux_amd64")
		absolutePath = abs
	}

	//Extract port number from listening addr
	tmp := strings.Split(handler.Port, ":")
	tmp = tmp[len(tmp)-1:]
	portOnly := strings.Join(tmp, "")

	log.Println("Starting WsTTY Adapter on: ", portOnly)

	//Start the gotty. This shoud be blocking by itself
	cmd := exec.Command(absolutePath, "-w", "-p", portOnly, "-a", "localhost", "--ws-origin", `\w*`, "bash", "--init-file", "bashstart")
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Start(); err != nil {
		//Fail to start gotty. Disable this module
		ioutil.WriteFile(".disabled", []byte(""), 0755)
		return
	}

}