# Worker code can be anything you want.
require 'rubygems'
require 'twitter'

require 'twitter_init'
require 'markov'

source_tweets = []

$rand_limit ||= 10
$markov_index ||= 2

puts "PARAMS: #{params}" if params.any?

unless params.key?("tweet")
  params["tweet"] = true
end

rand_key = rand($rand_limit)

def filtered_tweets(tweets)
  include_urls = $include_urls || params["include_urls"]
  source_tweets = tweets.map {|t| t.text.gsub(/\b(RT|MT) .+/, '') }

  if !include_urls
    source_tweets = source_tweets.reject {|t| t =~ /(https?:\/\/)/ }
  end

  source_tweets.map {|t| t.gsub(/(\#|@|(h\/t)|(http))\S+/, '') }
end

# randomly running only about 1 in $rand_limit times
unless rand_key == 0 || params["force"]
  puts "Not running this time (key: #{rand_key})"
else
  # Fetch a thousand tweets
  begin
    user_tweets = Twitter.user_timeline($source_account, :count => 200, :trim_user => true, :exclude_replies => true, :include_rts => false)
    max_id = user_tweets.last.id
    source_tweets += filtered_tweets(user_tweets)
  
    # Twitter only returns up to 3200 of a user timeline, includes retweets.
    17.times do
      user_tweets = Twitter.user_timeline($source_account, :count => 200, :trim_user => true, :max_id => max_id - 1, :exclude_replies => true, :include_rts => false)
      puts "MAX_ID #{max_id} TWEETS: #{user_tweets.length}"
      max_id = user_tweets.last.id
      source_tweets += filtered_tweets(user_tweets)
    end
  rescue
  end
  
  puts "#{source_tweets.length} tweets found"

  if source_tweets.length == 0
    raise "Error fetching tweets from Twitter. Aborting."
  end
  
  markov = MarkovChainer.new($markov_index)
  
  source_tweets.each do |twt|
    text = twt

    if text !~ /\p{Punct}/
      text += "."
    end
    
    markov.add_text(text)
  end
  
  tweet = nil
  
  10.times do
    tweet = markov.generate_sentence

    if rand(3) == 0 && tweet =~ /(in|to|from|for|with|by|our|of|your|around|under|beyond)\p{Space}\w+$/ 
      puts "Losing last word randomly"
      tweet.gsub(/\p{Space}\p{Word}+.$/, '')   # randomly losing the last word sometimes like horse_ebooks
    end

    if tweet.length < 40 && rand(5) == 0
      puts "Short tweet. Adding another sentence randomly"
      tweet += " #{markov.generate_sentence}"
    end

    if !params["tweet"]
      puts "MARKOV: #{tweet}"
    end

    tweet_letters = tweet.gsub(/\P{Word}/, '')
    break if !tweet.nil? && tweet.length < 110 && !source_tweets.any? {|t| t.gsub(/\P{Word}/, '') =~ /#{tweet_letters}/ }
  end
  
  if params["tweet"]
    if !tweet.nil? && tweet != ''
      puts "TWEET: #{tweet}"
      Twitter.update(tweet)
    else
      raise "ERROR: EMPTY TWEET"
    end
  else
    puts "DEBUG: #{tweet}"
  end
end