# -----------------------------------------------------------------------
#  Copyright © 2012 ShepHertz Technologies Pvt Ltd. All rights reserved.
# -----------------------------------------------------------------------

require 'rubygems'
require 'connection/RESTConnection.rb'
require 'util/util.rb'
require 'json/pure'
require 'App42Response.rb'
require 'session/SessionResponseBuilder.rb'
require 'App42Exception.rb'
require 'session/Session.rb'

module App42
  module Session
    #
    # The Session Manager manages user sessions on the server side. It is a persistent Session Manager.
    # It allows to save attributes in the session and retrieve them.
    # This Session Manager is especially useful for Mobile/Device Apps which want to do
    # session management.
    #
    # @see Session
    #
    class SessionService
      #
      # this is a constructor that takes
      #
      # @param apiKey
      # @param secretKey
      # @param baseURL
      #
      def initialize(api_key, secret_key, base_url)
        puts "Session Service->initialize"
        @api_key = api_key
        @secret_key = secret_key
        @base_url = base_url
        @resource = "session"
        @version = "1.0"
      end

      #
      # Create Session for the User. If the session does not exist it will create a new session
      #
      # @param uName
      #      - Username for which the session has to be created.
      #
      # @return Session object containing the session id of the created session. This id has to be used for storing or
      # retrieving attributes.
      #
      # @raise App42Exception
      #

      def get_session(uName)
        puts "Get Session Called "
        puts "Base url #{@base_url}"
        response = nil
        sessionObj = nil
        sessionObj = Session.new()
        util = Util.new
        util.throwExceptionIfNullOrBlank(uName, "User Name");
        begin
          connection = App42::Connection::RESTConnection.new(@base_url)
          body = {'app42' => {"session"=> {
            "userName" => uName
            }}}.to_json
          puts "Body #{body}"
          query_params = Hash.new
          params = {
            'apiKey'=> @api_key,
            'version' => @version,
            'timeStamp' => util.get_timestamp_utc,
          }
          query_params = params.clone
          params.store("body", body)
          puts query_params
          signature = util.sign(@secret_key, params)
          resource_url = "#{@version}/#{@resource}"
          response = connection.post(signature, resource_url, query_params, body)
          session = SessionResponseBuilder.new
          sessionObj = session.buildSessionResponse(response)
        rescue  App42Exception =>e
          raise e
        rescue  Exception => e
          raise App42Exception.new(e)
        end
        return sessionObj
      end

      #
      # Create User Session based on the isCreate boolean parameter.
      # If isCreate is true and there is an existing session for the user, the existing session
      # is returned. If there is no existing session for the user a new one is created.
      # If isCreate is false and there is an existing session, the existing session is returned
      # if there is no existing session new one is not created
      #
      # @param uName
      #      - Username for which the session has to be created.
      # @param isCreate
      #      - A boolean value for specifying if an existing session is not there, should
      # a new one is to be created or not.
      #
      # @return Session object containing the session id of the created session. This id has to be used for storing or
      # retrieving attributes.
      #
      # @raise App42Exception
      #

      def get_session_boolean(uName, isCreate)
        puts "Get Session Boolean Called "
        puts "Base url #{@base_url}"
        response = nil
        sessionObj = nil
        sessionObj = Session.new()
        util = Util.new
        util.throwExceptionIfNullOrBlank(uName, "User Name");
        util.throwExceptionIfNullOrBlank(isCreate, "Is Create");
        begin
          connection = App42::Connection::RESTConnection.new(@base_url)
          body = {'app42' => {"session"=> {
            "userName" => uName
            }}}.to_json
          puts "Body #{body}"
          query_params = Hash.new
          params = {
            'apiKey'=> @api_key,
            'version' => @version,
            'timeStamp' => util.get_timestamp_utc,
          }
          query_params = params.clone
          params.store("body", body)
          puts query_params
          signature = util.sign(@secret_key, params)
          resource_url = "#{@version}/#{@resource}/#{isCreate}"
          response = connection.post(signature, resource_url, query_params, body)
          session = SessionResponseBuilder.new
          sessionObj = session.buildSessionResponse(response)
        rescue  App42Exception =>e
          raise e
        rescue  Exception => e
          raise App42Exception.new(e)
        end
        return sessionObj
      end

      #
      # Invalidate a session based on the session id. All the attributes store in the session will be lost.
      #
      # @param sessionId
      #      - The session id for which the session has to be invalidated.
      #
      # @return App42Response if invalidated successfully
      #
      # @raise App42Exception
      #

      def invalidate(sessionId)
        puts "In Validate Called "
        puts "Base url #{@base_url}"
        response = nil
        sessionObj = nil
        sessionObj = Session.new()
        util = Util.new
        util.throwExceptionIfNullOrBlank(sessionId, "Session Id");
        begin
          connection = App42::Connection::RESTConnection.new(@base_url)
          body = {'app42' => {"session"=> {
            "id" => sessionId
            }}}.to_json
          puts "Body #{body}"
          query_params = Hash.new
          params = {
            'apiKey'=> @api_key,
            'version' => @version,
            'timeStamp' => util.get_timestamp_utc,
          }
          query_params = params.clone
          params.store("body", body)
          puts query_params
          signature = util.sign(@secret_key, params)
          resource_url = "#{@version}/#{@resource}"
          response = connection.put(signature, resource_url, query_params, body)
          session = SessionResponseBuilder.new
          sessionObj = session.buildSessionResponse(response)
        rescue  App42Exception =>e
          raise e
        rescue  Exception => e
          raise App42Exception.new(e)
        end
        return sessionObj
      end

      #
      # Sets attribute in a session whose session id is provided. Attributes are stored in a key value pair.
      #
      # @param sessionId
      #      - Session id for which the attribute has to be saved.
      # @param attributeName
      #      - The attribute key that needs to be stored
      # @param attributeValue
      #      - The attribute value that needs to be stored
      #
      # @return Session object containing the attribute and value which is stored
      #
      # @raise App42Exception
      #

      def set_attribute(sessionId,attributeName,attributeValue)
        puts "Set Attribute Called "
        puts "Base url #{@base_url}"
        response = nil
        sessionObj = nil
        sessionObj = Session.new()
        util = Util.new
        util.throwExceptionIfNullOrBlank(sessionId, "Session Id");
        util.throwExceptionIfNullOrBlank(attributeName, "Attribute Name");
        util.throwExceptionIfNullOrBlank(attributeValue, "Attribute Value");
        begin
          connection = App42::Connection::RESTConnection.new(@base_url)
          body = {'app42' => {"session"=> {
            "name" => attributeName,
            "value" => attributeValue
            }}}.to_json
          puts "Body #{body}"
          query_params = Hash.new
          params = {
            'apiKey'=> @api_key,
            'version' => @version,
            'timeStamp' => util.get_timestamp_utc,
            'sessionId'=> sessionId
          }
          query_params = params.clone
          params.store("body", body)
          puts query_params
          signature = util.sign(@secret_key, params)
          resource_url = "#{@version}/#{@resource}/id/#{sessionId}"
          response = connection.post(signature, resource_url, query_params, body)
          session = SessionResponseBuilder.new
          sessionObj = session.buildSessionResponse(response)
        rescue  App42Exception =>e
          raise e
        rescue  Exception => e
          raise App42Exception.new(e)
        end
        return sessionObj
      end

      #
      # Gets the attribute value in a session whose session id is provided.
      #
      # @param sessionId
      #      - The session id for which the attribute has to be fetched
      # @param attributeName
      #      - The attribute key that has to be fetched
      #
      # @return Session object containing  the attribute and value which is stored for the session id and attribute name
      #
      # @raise App42Exception
      #

      def get_attribute(sessionId,attributeName)
        puts "Get Attribute Called "
        puts "Base url #{@base_url}"
        response = nil
        sessionObj = nil
        sessionObj = Session.new()
        util = Util.new
        util.throwExceptionIfNullOrBlank(sessionId, "Session Id");
        util.throwExceptionIfNullOrBlank(attributeName, "Attribute Name");
        begin
          connection = App42::Connection::RESTConnection.new(@base_url)
          query_params = Hash.new
          params = {
            'apiKey'=> @api_key,
            'version' => @version,
            'timeStamp' => util.get_timestamp_utc,
          }
          query_params = params.clone
          params.store("sessionId", sessionId);
          params.store("name", attributeName)
          puts query_params
          signature = util.sign(@secret_key, params)
          resource_url = "#{@version}/#{@resource}/id/#{sessionId}/#{attributeName}"
          response = connection.get(signature, resource_url, query_params)
          session = SessionResponseBuilder.new
          sessionObj = session.buildSessionResponse(response)
        rescue  App42Exception =>e
          raise e
        rescue  Exception => e
          raise App42Exception.new(e)
        end
        return sessionObj
      end

      #
      # Gets all the attributes for a given session id
      #
      # @param sessionId
      #      - The session id for which the attribute has to be fetched
      #
      # @return Session object containing  all the attributes and values which are stored for the session id
      #
      # @raise App42Exception
      #

      def get_all_attribute(sessionId)
        puts "Get All Attributes Called "
        puts "Base url #{@base_url}"
        response = nil
        sessionObj = nil
        sessionObj = Session.new()
        util = Util.new
        util.throwExceptionIfNullOrBlank(sessionId,"Session Id")
        begin
          connection = App42::Connection::RESTConnection.new(@base_url)
          query_params = Hash.new
          params = {
            'apiKey'=> @api_key,
            'version' => @version,
            'timeStamp' => util.get_timestamp_utc,
          }
          query_params = params.clone
          params.store("sessionId", sessionId);
          puts query_params
          signature = util.sign(@secret_key, params)
          resource_url = "#{@version}/#{@resource}/id/#{sessionId}"
          response = connection.get(signature, resource_url, query_params)
          session = SessionResponseBuilder.new
          sessionObj = session.buildSessionResponse(response)
        rescue  App42Exception =>e
          raise e
        rescue  Exception => e
          raise App42Exception.new(e)
        end
        return sessionObj
      end

      #
      # Removes the  attribute from a session whose session id is provided.
      #
      # @param sessionId
      #      - The session id for which the attribute has to be removed
      # @param attributeName
      #      - The attribute key that has to be removed
      #
      # @return App42Response if removed successfully
      #
      # @raise App42Exception
      #

      def remove_attribute(sessionId,attributeName)
        puts "Remove Attribute Called "
        puts "Base url #{@base_url}"
        response = nil
        responseObj = App42Response.new();
        util = Util.new
        util.throwExceptionIfNullOrBlank(sessionId, "Session Id");
        util.throwExceptionIfNullOrBlank(attributeName, "Attribute Name");
        begin
          connection = App42::Connection::RESTConnection.new(@base_url)
          query_params = Hash.new
          params = {
            'apiKey'=> @api_key,
            'version' => @version,
            'timeStamp' => util.get_timestamp_utc,
          }
          query_params = params.clone
          params.store("sessionId", sessionId)
          params.store("name", attributeName)
          puts query_params
          signature = util.sign(@secret_key, params)
          resource_url = "#{@version}/#{@resource}/id/#{sessionId}/#{attributeName}"
          response = connection.delete(signature, resource_url, query_params)
          responseObj.strResponse=(response)
          responseObj.isResponseSuccess=(true)
        rescue  App42Exception =>e
          raise e
        rescue  Exception => e
          raise App42Exception.new(e)
        end
        return responseObj
      end

      #
      # Removes all the attributes for a given session id
      #
      # @param sessionId
      #      - The session id for which the attributes has to be removed
      #
      # @return App42Response if removed successfully
      #
      # @raise App42Exception
      #

      def remove_all_attribute(sessionId)
        puts "Remove All Attributes Called "
        puts "Base url #{@base_url}"
        response = nil
        responseObj = App42Response.new();
        util = Util.new
        util.throwExceptionIfNullOrBlank(sessionId, "Session Id");
        begin
          connection = App42::Connection::RESTConnection.new(@base_url)
          query_params = Hash.new
          params = {
            'apiKey'=> @api_key,
            'version' => @version,
            'timeStamp' => util.get_timestamp_utc,
          }
          query_params = params.clone
          params.store("sessionId", sessionId)
          puts query_params
          signature = util.sign(@secret_key, params)
          resource_url = "#{@version}/#{@resource}/id/#{sessionId}"
          response = connection.delete(signature, resource_url, query_params)
          responseObj.strResponse=(response)
          responseObj.isResponseSuccess=(true)
        rescue  App42Exception =>e
          raise e
        rescue  Exception => e
          raise App42Exception.new(e)
        end
        return responseObj
      end

    end
  end
end