require 'oauth/consumer'
require 'oauth/signature/plaintext'

class FreshbooksOauth
	# initialize the oauth consumer, and also access token if user_token and user_secret provided
  def initialize( user_url )
    @consumer = OAuth::Consumer.new("Your Freshbooks Consumer Key", "Your FreshBooks OAuth Secret", {
      :site => "https://"+user_url+".freshbooks.com",
      :request_token_path => "/oauth/oauth_request.php",
      :authorize_path => "/oauth/oauth_authorize.php",
      :access_token_path => "/oauth/oauth_access.php",
      :signature_method => 'PLAINTEXT',
      :oauth_version => '1.0a'
      })
  end	

	# returns the consumer
	def consumer
		@consumer
	end

	# returns the access token, also initializes new access token if user_token and user_secret provided
  def access_token( user_token = nil, user_secret = nil )
		( user_token && user_secret ) ? @access_token = OAuth::AccessToken.new( self.consumer, user_token, user_secret ) : @access_token
  end
  
  def access_token=(new_access_token)
		@access_token = new_access_token || false
  end

	# when the callback has been received, exchange the request token for an access token
	def exchange_request_for_access_token( request_token,  request_token_secret, oauth_verifier )
		#request_token = self.request_token( request_token, request_token_secret )
		request_token = OAuth::RequestToken.new(self.consumer, request_token, request_token_secret)
		#Exchange the request token for an access token. this may get 401 error
		self.access_token = request_token.get_access_token( :oauth_verifier => oauth_verifier )
	rescue => err
		puts "Exception in exchange_request_for_access_token: #{err}"
		raise err
	end

	# gets a request token to be used for the authorization request to freshbooks 
	def get_request_token( oauth_callback )
		self.consumer.get_request_token( :oauth_callback => oauth_callback )
	end
end