module Vkontakte
  require 'net/http'
  require 'erb'
  #require 'nokogiri'
  
  @@accounts = YAML.load_file("#{Rails.root.to_s}/config/vk_accounts.yml")
  
  def self.get artist, track, length
    #html = self.getHtml artist +' - '+ track
    files = self.parseHtml 1 #html
    files = self.calcWeight files, artist, track, length
    self.stream files.first['url']
  end
  
  
  private
  
  def self.randomBot
    @@accounts[@@accounts.keys[rand(@@accounts.keys.length - 1)]]
  end
  
  def self.getHtml q
    bot = self.randomBot
    headers = {
      'Cookie'            => 'remixsid='+ bot['remixsid'] + ';remixchk='+ bot['remixchk'].to_s,
			'Referer'           => 'http://vkontakte.ru/audio?album_id=0',
			'X-Requested-With'  => 'XMLHttpRequest',
			'Origin'            => 'http://vkontakte.ru',
			'Content-Type'      => 'application/x-www-form-urlencoded',
			'User-Agent'        => bot['user_agent'],
			'Connection'        => 'close'
    }
    data = {
      'act'			=> 'search',
			'al'			=> 1,
			'gid'			=> 0,
			'id'			=> bot['user_id'],
			'offset'  => 0,
			'q'				=> q,
			'sort'		=> 2
    }
    data_str = []
    data.each {|k, v| data_str << k +'='+ ERB::Util.url_encode(v.to_s)}
    
    http = Net::HTTP.new('vkontakte.ru', 80)
    resp, data = http.post('/audio', data_str.join('&'), headers)
    pp data
  end
  
  def self.parseHtml html
    html = open('/Users/chez/Sites/beathaven/tmp/vkres.txt').read
    files = []
    html
      .gsub(/\\/, '')
      .scan(/<table.*?<input.*?value=\"(.*?)\,\d{2,4}\".*?>.*?<div\sclass=\"duration.*?>(.*?)<\/div>.*?<div\sclass=\"title_wrap\".*?>.*?selectPerformer\(event\,\s\'(.*?)\'\).*?<span\sclass=\"title\">(.*?)<\/span><\/div>.*?<\/table>/i)
      .each do |item|
        t = item[1].split(':')
        files << {
          'url'     => item[0],
          'length'  => (t[0].to_i * 60) + t[1].to_i,
          'artist'  => item[2],
          'track'   => item[3].gsub(/<\/?.*?>/, '')
        }
      end
    files
  end
  
  def self.calcWeight files, artist, track, length
    files.each do |file|
      weight = 0
      
      if file['artist'] == artist then weight += 10 else
      if file['artist'].include? artist then weight += 5 else
      if file['track'].include? artist then weight += 4
      end end end
      
      if file['track'] == track then weight += 10 else
      if file['track'].include? track then weight += 5
      end end
      
      if file['length'] == length then weight +=10 else
        delta = (length - file['length']).abs
        if delta < 5 then weight += (5 - delta) end
      end
      
      file['weight'] = weight
    end
    
    files.sort_by{|file| file['weight']}.reverse
  end
  
  def self.stream url
    
  end
end