require 'time_constraint'
require 'location_constraint'
require 'or_constraint'

require 'dsl'

class MovieFinderContext
  include Dsl

  def initialize
    self.constraints = []
  end
  
  def self.evaluate(str)
    # Massage times so they look like a method (will be caught in method_missing
    str.gsub!(/(\d{1,2}(:\d{2})?(pm|am)?)\b/, "time_\\1 ").gsub!(":", "_")
    super
  end
  
  terminators "find", "and"
  
  modifier "finishing", :attribute, "finish_time"
  modifier "starting",   :attribute, "start_time"
  modifier "before", :operator, :<
  modifier "after",   :operator, :>
  
  bubble   "at"
  
  combinator OrConstraint, "or"  
  
  nouns LocationConstraint, "village", "readings"
  
  # Time nouns - tmies aren't valid method names so we need to prefix them and catch them here
  def method_missing(method, *args)
    if method.to_s =~ /^time_/
      time = method.to_s[5..-1]
      add_constraint(args[0])
      return TimeConstraint.new(time.gsub("_", ":"))
    else
      super
    end
  end

end