require "deviceatlasapi/version"
require "uri"
require 'httparty'

module DeviceAtlasApi
  module Rails
    class Engine < ::Rails::Engine
    end
  end

  autoload :ControllerHelpers, 'deviceatlasapi/controller'

  def self.setup
    yield self
  end

  class Client

    def initialize request
      @user_agent = request.env['HTTP_USER_AGENT']
      @headers = prepare_headers request

      if is_cookie_set?(request)
        @headers['X-DA-Client-Properties'] = get_client_properties request
      end

      @cloud_host = 'api.deviceatlascloud.com'
      @cookie_name = 'DAPROPS'
    end

    def get_device_data
      url = prepare_url
      HTTParty.get(url, :headers => @headers)["properties"]
    end

    def is_cookie_set? request
      request.cookies[@cookie_name].nil?
    end

    def get_client_properties request
      request.cookies['DAPROPS'].gsub /^"|"$/, ''
    end

    private

    def prepare_headers request
      {
          'HTTP_X_PROFILE' => request.env['HTTP_X_PROFILE'],
          'HTTP_X_WAP_PROFILE' => request.env['HTTP_X_WAP_PROFILE'],
          'HTTP_X_ATT_DEVICEID' => request.env['HTTP_X_ATT_DEVICEID'],
          'HTTP_ACCEPT' => request.env['HTTP_ACCEPT'],
          'HTTP_ACCEPT_LANGUAGE' => request.env['HTTP_ACCEPT_LANGUAGE'],
          'HTTP_X_DEVICE_USER_AGENT' => request.env['HTTP_X_DEVICE_USER_AGENT'],
          'HTTP_X_ORIGINAL_USER_AGENT' => request.env['HTTP_X_ORIGINAL_USER_AGENT'],
          'HTTP_X_OPERAMINI_PHONE_UA' => request.env['HTTP_X_OPERAMINI_PHONE_UA'],
          'HTTP_X_SKYFIRE_PHONE' => request.env['HTTP_X_SKYFIRE_PHONE'],
          'HTTP_X_BOLT_PHONE_UA' => request.env['HTTP_X_BOLT_PHONE_UA'],
          'HTTP_DEVICE_STOCK_UA' => request.env['HTTP_DEVICE_STOCK_UA'],
          'HTTP_X_UCBROWSER_DEVICE_UA' => request.env['HTTP_X_UCBROWSER_DEVICE_UA'],
          'X-DA-Version' => 'java/1.2_2'
      }.reject!{|k,v| v.nil?}
    end

    def prepare_url
      "http://#{@cloud_host}/v1/detect/properties?licencekey=#{ENV['DEVICE_ATLAS_LICENCE_KEY']}&useragent=#{URI.escape(@user_agent)}"
    end
  end
end