# Copyright 2010 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

require "addressable/uri"
require "oauth"

module Google #:nodoc:
  class APIClient #:nodoc:
    class OAuth1
      def initialize(options={})
        @options = {
          :request_token_uri =>
            'https://www.google.com/accounts/OAuthGetRequestToken',
          :authorization_uri =>
            'https://www.google.com/accounts/OAuthAuthorizeToken',
          :access_token_uri =>
            'https://www.google.com/accounts/OAuthGetAccessToken',
          :consumer_key => "anonymous",
          :consumer_secret => "anonymous"
        }.merge(options)
        @options[:request_token_uri] =
          Addressable::URI.parse(@options[:request_token_uri])
        @options[:authorization_uri] =
          Addressable::URI.parse(@options[:authorization_uri])
        @options[:access_token_uri] =
          Addressable::URI.parse(@options[:access_token_uri])
        if (@options[:request_token_uri].site !=
            @options[:authorization_uri].site) ||
            (@options[:request_token_uri].site !=
            @options[:authorization_uri].site)
          raise ArgumentError, "All OAuth endpoints must be on the same site."
        end
        @oauth_consumer = ::OAuth::Consumer.new(
          @options[:consumer_key], @options[:consumer_secret], {
            # This is an extremely unfortunate way to configure the consumer,
            # but not worth forking or patching to resolve.  Yet.
            :site               => @options[:request_token_uri].site,
            :scheme             => :header,
            :http_method        => :post,
            :request_token_path => @options[:request_token_uri].request_uri,
            :access_token_path  => @options[:access_token_uri].request_uri,
            :authorize_path     => @options[:authorization_uri].request_uri
          }
        )
      end
      
      def consumer_key
        return @oauth_consumer.key
      end

      def consumer_secret
        return @oauth_consumer.secret
      end
      
      def request_token_uri
        return @oauth_consumer.request_token_url
      end

      def authorization_uri
        return @oauth_consumer.authorize_url
      end

      def access_token_uri
        return @oauth_consumer.access_token_url
      end
    end
  end
end