class Router

  # initializing a router object that takes a controller
  # controller needs to come from outside, because it will store data (it already stores the repo!)
  def initialize(controller)
    @controller = controller
    @running = true
  end

  # the method that will run the software loop
  def run
    while @running == true do
      # calling private methods of our Router class
      user_choice = display_choices
      route_to(user_choice)
    end
    # if the loop ends, say goodbye
    puts "Bye bye"
  end

  private

  def route_to(user_choice)
    # route the user to the right action in the controller
    case user_choice
    when 1 then @controller.create_new_task
    when 2 then @controller.display_all_tasks
    when 3 then @controller.finish_a_task
    when 4 then @controller.delete_a_task
    else
      # if user presses any other key, set @running to false to stop the loop
      @running = false
    end
  end

  def display_choices
    # print all the choices for the user
    # ***TODO***: Do we want the welcome message display every time? Or should we move it somewhere else?
    puts "Welcome to the TODO MACHINE 300"
    puts "What is your command?"
    puts "Press 1 to create a new task"
    puts "Press 2 to show task list"
    puts "Press 3 to complete task"
    puts "Press 4 to delete a task"
    puts "Press any other key to exit"
    return gets.chomp.to_i
  end
end