require 'active_support/core_ext/time'

module Ensurance
  module Time
    def self.ensure(thing)
      case thing.class.name
      when "NilClass"
        thing
      when "Time"
        thing
      when "Date"
        thing.beginning_of_day
      when "Integer", "Float"
        ::Time.at(thing)
      when "String"
        if thing.to_i.to_s == thing
          ::Time.at(thing.to_i)
        elsif thing.to_f.to_s == thing
          ::Time.at(thing.to_f)
        else
          ::Time.parse(thing)
        end
      else
        if thing.respond_to?(:to_time)
          thing.to_time
        else
          raise ArgumentError.new("Unhandled Type for Time to ensure: #{thing.class}")
        end
      end
    end
  end
end

::Time.include Ensurance::Time