class Jusolink

# File lib/jusolink.rb, line 17
def instance(linkID, secretKey)
  @instance ||= new
  @instance.token_cache = nil
  @instance.linkhub = Linkhub.instance(linkID, secretKey)
  @instance.scopes = ["200"]
  return @instance
end

# File lib/jusolink.rb, line 97
def getBalance
  begin
    @linkhub.getPartnerBalance(getSession_Token(), ServiceID)
  rescue LinkhubException => le
    raise JusolinkException.new(le.code, le.message)
  end
end

# File lib/jusolink.rb, line 28
def getSession_Token()
  targetToken = nil
  refresh = false

  # check already cached CorpNum's SessionToken
  unless @token_cache.nil?
    targetToken = @token_cache
  end

  if targetToken.nil?
    refresh = true
  else
    # Token's expireTime must use parse() because time format is hh:mm:ss.SSSZ
    expireTime = DateTime.parse(targetToken['expiration'])
    serverUTCTime = DateTime.strptime(@linkhub.getTime())
    refresh = expireTime < serverUTCTime
  end

  if refresh
    begin
      # getSessionToken from Linkhub
      targetToken = @linkhub.getSessionToken(ServiceID, "", @scopes)
    rescue LinkhubException => le
      raise JusolinkException.new(le.code, le.message)
    end
    # refresh @token_cache object
    @token_cache = targetToken
  end

  targetToken['session_token']
end

# File lib/jusolink.rb, line 106
def getUnitCost
  httpget('/Search/UnitCost')['unitCost']
end

# File lib/jusolink.rb, line 60
def gzip_parse (target)
  sio = StringIO.new(target)
  gz = Zlib::GzipReader.new(sio)
  gz.read()
end

# File lib/jusolink.rb, line 67
def httpget(url)
  headers = {
    "x-pb-version" => Jusolink::POPBILL_APIVersion,
    "Accept-Encoding" => "gzip,deflate",
  }

  headers["Authorization"] = "Bearer " + getSession_Token()

  uri = URI(ServiceURL + url)
  request = Net::HTTP.new(uri.host, 443)
  request.use_ssl = true

  Net::HTTP::Get.new(uri)

  res = request.get(uri.request_uri, headers)

  if res.code == "200"
    if res.header['Content-Encoding'].eql?('gzip')
      JSON.parse(gzip_parse(res.body))
    else
      JSON.parse(res.body)
    end
  else
    raise JusolinkException.new(JSON.parse(res.body)["code"],
      JSON.parse(res.body)["message"])
  end
end

# File lib/jusolink.rb, line 111
def search(index, pageNum = 1, perPage = 20, noSuggest = false, noDiff = false)
  if index.to_s == ''
    raise JusolinkException.new('-99999999', '검색어가 입력되지 않았습니다.')
  end

  uri = "/Search?Searches="+index
  uri += "&PageNum=" + pageNum.to_s
  uri += "&PerPage=" + perPage.to_s

  if noSuggest
    uri += "&noSuggest=true"
  end

  if noDiff
    uri += "&noDiff=true"
  end

  httpget(URI.escape(uri))
end