#!/usr/bin/env ruby
# encoding: utf-8

require 'twitter_ebooks'

$debug = true

module Ebooks
  APP_PATH = Dir.pwd # XXX do some recursive thing instead

  def self.new(reponame)
    usage = <<STR
Usage: ebooks new <reponame>

Creates a new skeleton repository defining a template bot in
the current working directory specified by <reponame>.
STR

    if reponame.nil?
      log usage
      exit
    end

    path = "./#{reponame}"

    if File.exists?(path)
      log "#{path} already exists. Please remove if you want to recreate."
      exit
    end

    FileUtils.cp_r(SKELETON_PATH, path)

    File.open(File.join(path, 'bots.rb'), 'w') do |f|
      template = File.read(File.join(SKELETON_PATH, 'bots.rb'))
      f.write(template.gsub("{{BOT_NAME}}", reponame))
    end

    log "New twitter_ebooks app created at #{reponame}"
  end

  def self.consume(pathes)
    usage = <<STR
Usage: ebooks consume <corpus_path> [corpus_path2] [...]

Processes some number of text files or json tweet corpuses
into usable models. These will be output at model/<name>.model
STR

    if pathes.empty?
      log usage
      exit
    end

    pathes.each do |path|
      filename = File.basename(path)
      shortname = filename.split('.')[0..-2].join('.')

      outpath = File.join(APP_PATH, 'model', "#{shortname}.model")
      Model.consume(path).save(outpath)
      log "Corpus consumed to #{outpath}"
    end
  end

  def self.gen(model_path, input)
    usage = <<STR
Usage: ebooks gen <model_path> [input]

Make a test tweet from the processed model at <model_path>.
Will respond to input if provided.
STR
    if model_path.nil?
      log usage
      exit
    end

    model = Model.load(model_path)
    if input && !input.empty?
      puts "@cmd " + model.make_response(input, 135)
    else
      puts model.make_statement
    end
  end

  def self.score(model_path, input)
    usage = <<STR
Usage: ebooks score <model_path> <input>

Scores "interest" in some text input according to how
well unique keywords match the model.
STR
    if model_path.nil? || input.nil?
      log usage
      exit
    end

    model = Model.load(model_path)
    model.score_interest(input)
  end

  def self.archive(username, outpath)
    usage = <<STR
Usage: ebooks archive <username> <outpath>

Downloads a json corpus of the <username>'s tweets to <outpath>.
Due to API limitations, this can only receive up to ~3000 tweets
into the past.
STR

    if username.nil? || outpath.nil?
      log usage
      exit
    end

    Archive.new(username, outpath).sync
  end

  def self.tweet(modelpath, botname)
    usage = <<STR
Usage: ebooks jsonify <old_corpus_path> [old_corpus_path2] [...]

Takes an old-style corpus of plain tweet text and converts it to json.
STR

    if modelpath.nil? || botname.nil?
      log usage
      exit
    end

    load File.join(APP_PATH, 'bots.rb')
    model = Model.load(modelpath)
    statement = model.make_statement
    log "@#{botname}: #{statement}"
    bot = Bot.get(botname)
    bot.configure
    bot.tweet(statement)
  end

  def self.jsonify(paths)
    usage = <<STR
Usage: ebooks jsonify <old_corpus_path> [old_corpus_path2] [...]

Takes an old-style corpus of plain tweet text and converts it to json.
STR

    if paths.empty?
      log usage
      exit
    end

    paths.each do |path|
      name = File.basename(path).split('.')[0]
      new_path = name + ".json"

      tweets = []
      id = nil
      File.read(path).split("\n").each do |l|
        if l.start_with?('# ')
          id = l.split('# ')[-1]
        else
          tweet = { text: l }
          if id
            tweet[:id] = id
            id = nil
          end
          tweets << tweet
        end
      end

      File.open(new_path, 'w') do |f|
        log "Writing #{tweets.length} tweets to #{new_path}"
        f.write(JSON.pretty_generate(tweets))
      end
    end
  end

  def self.command(args)
    usage = <<STR
Usage:
     ebooks new <reponame>
     ebooks consume <corpus_path> [corpus_path2] [...]
     ebooks gen <model_path> [input]
     ebooks score <model_path> <input>
     ebooks archive <@user> <outpath>
     ebooks tweet <model_path> <botname>
     ebooks jsonify <old_corpus_path> [old_corpus_path2] [...]
STR

    if args.length == 0
      log usage
      exit
    end

    case args[0]
    when "new" then new(args[1])
    when "consume" then consume(args[1..-1])
    when "gen" then gen(args[1], args[2..-1].join(' '))
    when "score" then score(args[1], args[2..-1].join(' '))
    when "archive" then archive(args[1], args[2])
    when "tweet" then tweet(args[1], args[2])
    when "jsonify" then jsonify(args[1..-1])
    else
      log usage
      exit 1
    end
  end
end

Ebooks.command(ARGV)