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#
# Copyright (c) 2016, Electric Power Research Institute (EPRI)
# All rights reserved.
#
# OpenADR ("this software") is licensed under BSD 3-Clause license.
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# MIT Licensed Libraries
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# * actionmailer 3.2.12 (http://www.rubyonrails.org) - Email composition, delivery, and receiving framework (part of Rails).
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# * builder 3.0.4 (http://onestepback.org) - Builders for MarkUp.
# * bundler 1.12.5 (http://bundler.io) - The best way to manage your application's dependencies
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# * coffee-rails 3.2.2 () - Coffee Script adapter for the Rails asset pipeline.
# * coffee-script-source 1.6.3 (http://jashkenas.github.com/coffee-script/) - The CoffeeScript Compiler
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# * edn 1.0.0 () - 'edn implements a reader for Extensible Data Notation by Rich Hickey.'
# * erubis 2.7.0 (http://www.kuwata-lab.com/erubis/) - a fast and extensible eRuby implementation which supports multi-language
# * execjs 1.4.0 (https://github.com/sstephenson/execjs) - Run JavaScript code from Ruby
# * factory_girl 4.5.0 (https://github.com/thoughtbot/factory_girl) - factory_girl provides a framework and DSL for defining and using model instance factories.
# * factory_girl_rails 4.5.0 (http://github.com/thoughtbot/factory_girl_rails) - factory_girl_rails provides integration between factory_girl and rails 3
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# * rack 1.4.5 (http://rack.github.com/) - a modular Ruby webserver interface
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# * rack-ssl 1.3.3 (https://github.com/josh/rack-ssl) - Force SSL/TLS in your app.
# * rails 3.2.12 (http://www.rubyonrails.org) - Full-stack web application framework.
# * simplecov-html 0.8.0 (https://github.com/colszowka/simplecov-html) - Default HTML formatter for SimpleCov code coverage tool for ruby 1.9+
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# BSD Licensed Libraries
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# * activerecord-jdbc-adapter 1.2.9.1 (https://github.com/jruby/activerecord-jdbc-adapter) - Copyright (c) 2006-2012 Nick Sieger <nick@nicksieger.com>, Copyright (c) 2006-2008 Ola Bini <ola.bini@gmail.com> 
# * jdbc-postgres 9.2.1004 (https://github.com/jruby/activerecord-jdbc-adapter) - Copyright (c) 1997-2011, PostgreSQL Global Development Group
# * d3js 3.5.16 (https://d3js.org/) Copyright (c) 2015 Mike Bostock
#
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# Ruby Licensed Libraries
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#
# * json 1.8.0 (http://json-jruby.rubyforge.org/) - JSON implementation for JRuby
# * rubyzip 0.9.9 (http://github.com/aussiegeek/rubyzip) - rubyzip is a ruby module for reading and writing zip files
# * httpclient 2.3.4.1 (http://github.com/nahi/httpclient) - gives something like the functionality of libwww-perl (LWP) in Ruby
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# Public domain - creative commons Licensed Libraries
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# 
# * torquebox 3.1.2 (http://torquebox.org/) - TorqueBox Gem
# * torquebox-cache 3.1.2 (http://torquebox.org/) - TorqueBox Cache Gem
# * torquebox-configure 3.1.2 (http://torquebox.org/) - TorqueBox Configure Gem
# * torquebox-core 3.1.2 (http://torquebox.org/) - TorqueBox Core Gem
# * torquebox-messaging 3.1.2 (http://torquebox.org/) - TorqueBox Messaging Client
# * torquebox-naming 3.1.2 (http://torquebox.org/) - TorqueBox Naming Client
# * torquebox-rake-support 3.1.2 (http://torquebox.org/) - TorqueBox Rake Support
# * torquebox-security 3.1.2 (http://torquebox.org/) - TorqueBox Security Gem
# * torquebox-server 3.1.2 (http://torquebox.org/) - TorqueBox Server Gem
# * torquebox-stomp 3.1.2 (http://torquebox.org/) - TorqueBox STOMP Support
# * torquebox-transactions 3.1.2 (http://torquebox.org/) - TorqueBox Transactions Gem
# * torquebox-web 3.1.2 (http://torquebox.org/) - TorqueBox Web Gem
#
#########################################################################################
# Apache Licensed Libraries
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#
# * addressable 2.3.8 (https://github.com/sporkmonger/addressable) - URI Implementation
# * bcrypt-ruby 3.0.1 (http://bcrypt-ruby.rubyforge.org) - OpenBSD's bcrypt() password hashing algorithm.
# * database_cleaner 1.4.0 (http://github.com/bmabey/database_cleaner) - Strategies for cleaning databases.  Can be used to ensure a clean state for testing.
# * annotate 2.5.0 (http://github.com/ctran/annotate_models) - Annotates Rails Models, routes, fixtures, and others based on the database schema.
# * nvd3 1.8.4 (http://nvd3.org/) Copeyright (c) 2014 Novus Partners - chart library based on d3js
# * smack 3.3.1 (https://www.igniterealtime.org/projects/smack/) - XMPP library
#
#########################################################################################
# LGPL
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#
# * jruby-1.7.4
# * jruby-jars 1.7.4 (http://github.com/jruby/jruby/tree/master/gem/jruby-jars) - The core JRuby code and the JRuby stdlib as jar 
# ** JRuby is tri-licensed GPL, LGPL, and EPL.
#
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# MPL Licensed Libraries
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#
# * therubyrhino_jar 1.7.4 (http://github.com/cowboyd/therubyrhino) - Rhino's jars packed for therubyrhino
#
#########################################################################################
# Artistic 2.0
# * mime-types 1.23 (http://mime-types.rubyforge.org/) - This library allows for the identification of a file's likely MIME content type
#
#########################################################################################
#
#########################################################################################
# GPL-2
#########################################################################################
# * mime-types 1.23 (http://mime-types.rubyforge.org/) - This library allows for the identification of a file's likely MIME content type
#
#########################################################################################
# No License Given
#########################################################################################
#
# * spork-testunit 0.0.8 (http://github.com/timcharper/spork-testunit) - spork-testunit
# * sprockets 2.2.2 (http://getsprockets.org/) - Rack-based asset packaging system
#
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require 'app/lib/oadr_logger'

require 'app/services/xmpp/xmpp_service_handler'

require 'app/services/http/http_agent_a'
require 'app/services/http/http_agent_b'

class PushMessageManager
  ########################################################

  def initialize(options)

    @running_transports = Hash.new
    @options = options
  end

  ########################################################

  def start_transport_agent(ven)

    OadrLogger.instance.log_info("starting agent for ven: #{ven.id}")

    if ven.http_push?
      OadrLogger.instance.log_info("starting http A agent for ven: #{ven.id}")

      agant = agent = HttpAgentA.new(ven.id, @options)

    elsif ven.registration.oadr_transport_name == 'simpleHttp'
      OadrLogger.instance.log_info("starting http B agent for ven: #{ven.id}")

      # is it an HTTP or XMPP agent? profile a or b
      agent = HttpAgentB.new(ven.id, @options)
    else
      OadrLogger.instance.log_info("starting xmpp agent for ven: #{ven.id}")

      agent = XmppAgent.new(ven.id, @xmpp_service_handler)

    end

    agent.start

    agent
  end

  ########################################################

  def stop_transport_agent(ven)

    agent = @running_transports[ven.id]

    return if agent.nil?

    OadrLogger.instance.log_error("stopping agent for ven: #{ven.id}")

    @running_transports.delete(ven.id)

    agent.stop

  end

  ########################################################

  def stop_all_transport_agents

    @running_transports.each do |agent|
      agent.stop
    end
  end

  ########################################################

  def check_push_vens(vens)
    vens.each do |ven|

      # if the VEN is registered and it's a push VEN, start a transport_agent to
      # handle proxying messages
      if (not ven.registration.nil? and ven.registration.oadr_http_pull_model == false) or (ven.http_push?) # and ven.registration.oadr_transport_name == 'simpleHttp'
        rt = @running_transports[ven.id]

        # the push transport for this ven isn't running
        if rt.nil?
          @running_transports[ven.id] = start_transport_agent(ven)
        end
        # the ven should not be running
      else

        stop_transport_agent(ven)
      end
    end
  end

  ########################################################

  def check_cancelled_events(vens)

    # OadrLogger.instance.log_info('checking cancelled events')

    vens.each do |ven|

      if not ven.registration.nil? and ven.registration.oadr_http_pull_model == false or ven.http_push?
        ven.check_cancelled_events
      end

    end

  end

  ########################################################

  def start
    OadrLogger.instance.log_info('starting push message manager service')

    Thread.new do

      execute

    end

  end

  ########################################################

  def stop
    @done = true
  end

  ########################################################

private

  def execute

    begin

      if @options['tlsDebug'] == true
        Java::java.lang.System.set_property("javax.net.debug", "SSL");
      end

      if @options['enableXmpp'] != false
        @xmpp_service_handler = XmppServiceHandler.new(@options)
        @xmpp_service_handler.start
      end

      # sleep for a few seconds to allow the services to start
      sleep 5
    rescue Exception => ex
      OadrLogger.instance.log_caught_exception(ex)
    end

    count = 0

    until @done

      begin
        # OadrLogger.instance.log_info('querying vens')

        vens = Ven.all# .reload

        check_push_vens(vens)

        count = count + 1

        if count % 6 == 0
          check_cancelled_events(vens)
        end

        sleep 5
      rescue Exception => ex
        OadrLogger.instance.log_caught_exception(ex)
      end
    end

    stop_all_transport_agents

  end
end