val shell = Shell("sh")                         // create a shell
val result = shell.run("echo 'Hello, World!'")  // execute a command
if (result.isSuccess) {                         // check if the exit-code was 0
    println(result.stdout())                    // prints "Hello, World!"
}

// Construct a new shell instance with additional environment variables
val shell = Shell("sh", "USER" to "Chuck Norris", "ENV_VAR" to "VALUE")

// Construct a new shell instance with path to the shell:
val bash = Shell("/bin/bash")

val shell = Shell.SH
val result: Shell.Command.Result = shell.run("ls")

shell.addOnStderrLineListener(object : Shell.OnLineListener {
  override fun onLine(line: String) {
      // do something
  }
})

shell.addOnCommandResultListener(object : Shell.OnCommandResultListener {
  override fun onResult(result: Shell.Command.Result) {
    // do something with the result
  }
})

// NOTE: all of these are optional
val result = Shell.SH.run(command) {
  // Kill the command after 1 minute
  timeout = Shell.Timeout(1, TimeUnit.MINUTES)
  // Redirect STDOUT to STDERR
  redirectErrorStream = false
  // Callbacks:
  onCancelled = {
    // The command was cancelled
  }
  onStdErr = { line: String ->
    // Do something when reading a line from standard error stream
  }
  onStdOut = { line: String ->
    // Do something when reading a line from standard output stream
  }
  // Do not notify any listeners added via Shell.addOnStderrLineListener and Shell.addOnStdoutLineListener
  notify = false
}

if (shell.isRunning()) {
  // The shell is running a command
} else if (shell.isShutdown()) {
  // The shell has been killed
} else if (shell.isIdle()) {
  // The shell is open and not running any commands
}

when (shell.state) {
  State.Idle -> TODO()
  State.Running -> TODO()
  State.Shutdown -> TODO()
}

shell.shutdown()

shell.interrupt()

fun run(
    shell: Shell,
    command: String,
    callback: (result: Shell.Command.Result) -> Unit
) = viewModelScope.launch {
    val result = withContext(Dispatchers.IO) { shell.run(command) }
    withContext(Dispatchers.Main) { callback(result) }
}