require 'omniauth/oauth'
require 'multi_json'

module OmniAuth
  module Strategies
    # Authenticate to T163 via OAuth and retrieve basic
    # user information.
    #
    # Usage:
    #
    #    use OmniAuth::Strategies::T163, 'APIKey', 'APIKeySecret'
    class T163 < OmniAuth::Strategies::OAuth
      def initialize(app, consumer_key=nil, consumer_secret=nil, options={}, &block)
        @api_key = consumer_key
        client_options = {
          :access_token_path => '/oauth/access_token',
          :authorize_path => '/oauth/authenticate',
          :realm => 'OmniAuth',
          :request_token_path => '/oauth/request_token',
          :site => 'http://api.t.163.com',
        }
        super(app, :t163, consumer_key, consumer_secret, client_options, options, &block)
      end

      def auth_hash
        OmniAuth::Utils.deep_merge(
          super, {
            'uid' => user_hash['screen_name'],
            'user_info' => user_info,
            'extra' => {
              'user_hash' => user_hash,
            },
          }
        )
      end

      def user_info
        user_hash = self.user_hash
        {
          'username' => user_hash['name'],
          'name' => user_hash['realName'],
          'location' => user_hash['location'],
          'image' => user_hash['profile_image_url'],
          'description' => user_hash['description'],
          'email' => user_hash['email'],
          'urls' => {
            'T163' => 'http://t.163.com',
          },
        }
      end

      def user_hash
        @user_hash ||= MultiJson.decode(@access_token.get("http://api.t.163.com/account/verify_credentials.json").body)
      end
    end
  end
end