#!/usr/bin/env ruby

ENV["RAILS_ENV"] ||= "production"

APP_PATH = File.expand_path('../../config/application',  __FILE__)
require File.expand_path('../../config/boot',  __FILE__)
require APP_PATH
Rails.application.require_environment!

MIN_STORY_SCORE = 3

Story.where("is_expired = ? AND #{Story.score_sql} >= ? AND " <<
"twitter_id IS NULL AND created_at >= ?", false, MIN_STORY_SCORE,
Time.now - 1.days).order(:id).each_with_index do |s,x|
  if s.tags.map(&:tag).include?("meta")
    next
  end

  if x > 0
    sleep 2
  end

  tags = ""
  s.sorted_taggings.each do |tagging|
    tags += ' #' + tagging.tag.tag
  end

  via = ""
  if s.user.twitter_username.present?
    via = "\n" + (s.user_is_author? ? "by" : "via") +
      " @#{s.user.twitter_username}"
  end

  tco_status = via + "\n" +
    (s.url.present?? ("X" * Twitter::TCO_LEN) + "\n" : "") +
    ("X" * Twitter::TCO_LEN) +
    tags

  status = via + "\n" +
    (s.url.present?? s.url + "\n" : "") +
    s.short_id_url +
    tags

  left_len = Twitter::MAX_TWEET_LEN - tco_status.length

  title = s.title
  if title.match(/^([dm] |@)/i)
    # prevent these tweets from activating twitter shortcuts
    # https://dev.twitter.com/docs/faq#tweeting
    title = "- #{title}"
  end

  # if there are any urls in the title, they should be sized (at least) to a
  # twitter t.co url
  left_len -= (title.scan(/[^ ]\.[a-z]{2,10}/i).map{|u| [ 0,
    Twitter::TCO_LEN ].max }.inject(:+)).to_i

  if left_len < -3
    left_len = -3
  end

  if title.bytesize > left_len
    status = title[0, left_len - 3] + "..." + status
  else
    status = title + status
  end

  res = Twitter.oauth_request("/1.1/statuses/update.json", :post,
    { "status" => status })

  begin
    if res["id_str"].to_s.match(/\d+/)
      s.update_column("twitter_id", res["id_str"])
    elsif res["errors"].select{|e| e["code"] == 226 }.any?
      # twitter is rejecting the content of this message, skip it
      s.update_column("twitter_id", 0)
      puts "skipping: failed posting story #{s.id} (#{status.inspect}): " +
        "#{res.inspect}\n"
    else
      raise
    end
  rescue => e
    puts "failed posting story #{s.id} (#{status.inspect}): #{e.inspect}\n" +
      "#{res.inspect}"
    exit
  end
end