module Aws::Util

def copy_hash(hash)
  if Hash === hash
    deep_copy(hash)
  else
    raise ArgumentError, "expected hash, got `#{hash.class}`"
  end
end

def deep_copy(obj)
  case obj
  when nil then nil
  when true then true
  when false then false
  when Hash
    obj.inject({}) do |h, (k,v)|
      h[k] = deep_copy(v)
      h
    end
  when Array
    obj.map { |v| deep_copy(v) }
  else
    if obj.respond_to?(:dup)
      obj.dup
    elsif obj.respond_to?(:clone)
      obj.clone
    else
      obj
    end
  end
end

def deep_merge(left, right)
  case left
  when Hash then left.merge(right) { |key, v1, v2| deep_merge(v1, v2) }
  when Array then right + left
  else right
  end
end

def monotonic_milliseconds
  if defined?(Process::CLOCK_MONOTONIC)
    Process.clock_gettime(Process::CLOCK_MONOTONIC, :millisecond)
  else
    DateTime.now.strftime('%Q').to_i
  end
end

def monotonic_seconds
  monotonic_milliseconds / 1000.0
end

def str_2_bool(str)
  case str.to_s
  when "true" then true
  when "false" then false
  else
    nil
  end
end