module Byebug::Helpers::VarHelper

def safe_inspect(var)
  var.inspect
rescue
  safe_to_s(var)
end

def safe_to_s(var)
  var.to_s
rescue
  '*Error in evaluation*'
end

def var_args
  args = context.frame.args
  return if args == [[:rest]]
  all_locals = context.frame.locals
  arg_values = args.map { |arg| arg[1] }
  locals = all_locals.select { |k, _| arg_values.include?(k) }
  puts prv(locals.keys.sort.map { |k| [k, locals[k]] }, 'instance')
end

def var_global
  globals = global_variables.reject do |v|
    [:$IGNORECASE, :$=, :$KCODE, :$-K, :$binding].include?(v)
  end
  var_list(globals)
end

def var_instance(str)
  obj = single_thread_eval(str || 'self')
  var_list(obj.instance_variables, obj.instance_eval { binding })
end

def var_list(ary, binding = context.frame._binding)
  vars = ary.sort.map do |name|
    [name, safe_inspect(silent_eval(name.to_s, binding))]
  end
  puts prv(vars, 'instance')
end

def var_local
  locals = context.frame.locals
  cur_self = context.frame._self
  locals[:self] = cur_self unless cur_self.to_s == 'main'
  puts prv(locals.keys.sort.map { |k| [k, locals[k]] }, 'instance')
end