class GoogleTranslate

# File lib/google_translate/google_translate.rb, line 36
def say lang, text
  speech_content = call_speech_service(lang, text)

  file = Tempfile.new('.google_translate_speech---')

  file.write(speech_content)

  file.close

  system "afplay #{file.path}"

  file.unlink
end

# File lib/google_translate/google_translate.rb, line 13
def supported_languages
  response = call_service GOOGLE_TRANSLATE_SERVICE_URL

  from_languages = collect_languages response.body, 0, 'sl', 'gt-sl'
  to_languages   = collect_languages response.body, 1, 'tl', 'gt-tl'

  [from_languages, to_languages]
end

# File lib/google_translate/google_translate.rb, line 22
def translate(from_lang, to_lang, text)
  raise("Missing 'from' language") unless from_lang
  raise("Missing 'to' language") unless to_lang
  raise("Missing text for translation") unless text

  r = call_translate_service(from_lang, to_lang, URI.escape(text))

  result = JSON.parse(r.gsub('[,', '['))

  raise("Translate Server is down") if (!result || result.empty?)

  result
end

# File lib/google_translate/google_translate.rb, line 80
def call_service url
  accessor = ResourceAccessor.new

  accessor.get_response url: url
end

# File lib/google_translate/google_translate.rb, line 72
def call_speech_service lang, text
  url = speech_url(lang)

  response = call_service url + "&q=#{text}"

  response.body
end

# File lib/google_translate/google_translate.rb, line 64
def call_translate_service from_lang, to_lang, text
  url = translate_url(from_lang, to_lang)

  response = call_service url + "&q=#{text}"

  response.body.split(',').collect { |s| s == '' ? "\"\"" : s }.join(",") # fix json object
end

# File lib/google_translate/google_translate.rb, line 86
def collect_languages buffer, index, tag_name, tag_id
  spaces = '\s?'
  quote  = '(\s|\'|")?'

  id_part       = "id#{spaces}=#{spaces}#{quote}#{tag_id}#{quote}"
  name_part     = "name#{spaces}=#{spaces}#{quote}#{tag_name}#{quote}"
  class_part    = "class#{spaces}=#{spaces}#{quote}(.*)?#{quote}"
  tabindex_part = "tabindex#{spaces}=#{spaces}#{quote}0#{quote}"
  phrase        = "#{spaces}#{id_part}#{spaces}#{name_part}#{spaces}#{class_part}#{spaces}#{tabindex_part}#{spaces}"

  re1 = buffer.split(%r{<select#{phrase}>(.*)?</select>}).select { |x| x =~ %r{<option} }

  stopper = "</select>"

  text = re1[index]

  if index == 0
    pos  = text.index(stopper)
    text = text[0..pos]
  end

  re2     = /<option(\s*)value="([a-z|A-Z|-]*)">([a-z|A-Z|\(|\)|\s]*)<\/option>/
  matches = text.gsub(/selected/i, '').squeeze.scan(re2)

  if matches.size == 0
    re2     = /<option(\s*)value=([a-z|A-Z|-]*)>([a-z|A-Z|\(|\)|\s]*)<\/option>/
    matches = text.gsub(/selected/i, '').squeeze.scan(re2)
  end

  matches.map { |m| Language.new(m[2], m[1]) }
end

# File lib/google_translate/google_translate.rb, line 60
def speech_url(lang)
  "#{GOOGLE_SPEECH_SERVICE_URL}?tl=#{lang}&ie=UTF-8&oe=UTF-8"
end

# File lib/google_translate/google_translate.rb, line 52
def translate_url(from_lang, to_lang)
  url = "#{GOOGLE_TRANSLATE_SERVICE_URL}/translate_a/single"
  params = "client=t&sl=#{from_lang}&tl=#{to_lang}&hl=en&dt=bd&dt=ex&dt=ld&dt=md&dt=qc&dt=rw&dt=rm&dt=ss" +
           "&dt=t&dt=at&dt=sw&ie=UTF-8&oe=UTF-8&prev=btn&rom=1&ssel=0&tsel=0"

  "#{url}?#{params}"
end