class Pry
  class Command::JumpTo < Pry::ClassCommand
    match 'jump-to'
    group 'Navigating Pry'
    description 'Jump to a binding further up the stack.'

    banner <<-'BANNER'
      Jump to a binding further up the stack, popping all bindings below.
    BANNER

    def process(break_level)
      break_level    = break_level.to_i
      nesting_level  = _pry_.binding_stack.size - 1
      max_nest_level = nesting_level - 1

      case break_level
      when nesting_level
        output.puts "Already at nesting level #{nesting_level}"
      when 0..max_nest_level
        _pry_.binding_stack = _pry_.binding_stack[0..break_level]
      else
        output.puts "Invalid nest level. Must be between 0 and " \
          "#{max_nest_level}. Got #{break_level}."
      end
    end
  end

  Pry::Commands.add_command(Pry::Command::JumpTo)
end