# coding: utf-8
class Eliza
  def initialize()
    @history = []  # Instanz-Variable, in allen Methoden sichtbar
    # Eventuell weitere Variablen für bessere Antworten initialisieren
    
    # 	 http://www.linguasorb.com/english/verbs/most-common-verbs/
    @verbs = File.readlines("verblist-useful.txt").map{|l| l.split("\t")}.flatten
  end
 
  def antwort(satz)
    # hier satz und eventuell @history analysieren, antwort darauf aufbauen
      
    # Überprüfen, kommmen personalpronomen in 1. und 2. Person vor.
    # "Vertauschen"

    swaps = {"I"=>"you",
             "I'm"=>"you're",
             "I've" => "you've",
             "I am"=>"you are",
             "me" => "you",
             "my" => "your",
             "mine" => "yours",
             "myself" => "yourself",
             "your" => "my",
             "yours" => "mine",
             "yourself" => "myself",
             "you're" => "I'm",
             "you've" => "I have",
             "you are" => "I am"
            }

    
    antwort = satz.gsub(/(\bI('m|'ve| am|\b)|\bm[ey]\b|\bmine\b|\bmysel\b|(\byou(r|'re|'ve|rs|rself)\b)|\byou\s+\w+|you[!?.,]|you$)/i) {|m|
      puts "Found ->#{m}<-"
      if swaps[m]
        swaps[m]
      else
        if m=~/\byou\s+(\w+)/i
          if @verbs.include?($1)
            "I #{$1}"
          else
            "me #{$1}"
          end
        else
          m.gsub("you","me")
        end
      end
    }

    type = antwort.strip[-1]
    if type=="?"
      ans = ["It might be that",
       "Sometimes it might happen that",
       "Unlikely, but it is possible that",
       "It is questionable whether"]
      rest = ["Does this bother you?",
              "Is this why you came to me?",
              "Have you talked about this with your friends?",
              "Does your mother know?",
              "Do you want to reconsider?"]
      
      antwort = ans[rand(ans.size)]+" "+antwort[0...-1]+". "+rest[rand(rest.size)]
    else
      ans = ["Is it your fault that",
             "Does it happen often that",
             "What is your reaction that",
             "Does your mother care that"]
      antwort = ans[rand(ans.size)]+" "+antwort+"?"
    end
    @history.push(satz)
    return antwort
  end
  
  def is_good_bye?(satz)
    # Hier auswerten, ob das Gespräche beendet werden soll
    return false
  end
 
  def talk()
     puts "Please write a line"
     while (true)
       text = gets.chomp
       break if is_good_bye?(text)
       puts antwort(text)
     end
     puts "Good bye!"
  end
end
# Wird nur ausgeführt, wenn diese Datei
# direkt auf der Kommandozeile
# aufgerufen wird.

if __FILE__==$0
    e = Eliza.new
    e.talk()
end