require 'omniauth/oauth'
require 'multi_json'

module OmniAuth
  module Strategies
    #
    # Authenticate to Miso via OAuth and retrieve basic
    # user information.
    #
    # Usage:
    #
    #    use OmniAuth::Strategies::Miso, 'consumerkey', 'consumersecret'
    #
    class Miso < OmniAuth::Strategies::OAuth
      def initialize(app, consumer_key=nil, consumer_secret=nil, options={}, &block)
        client_options = {
          :site => 'https://gomiso.com',
        }
        super(app, :miso, consumer_key, consumer_secret, client_options, options, &block)
      end

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

      def user_info
        {
          'nickname' => user_hash['username'],
          'name' => user_hash['full_name'],
          'image' => user_hash['profile_image_url'],
          'description' => user_hash['tagline'],
        }
      end

      def user_hash
        @user_hash ||= MultiJson.decode(@access_token.get('/api/oauth/v1/users/show.json').body)['user']
      end
    end
  end
end