#!/usr/bin/ruby
 
require 'rubygems'
require 'stomp'
require 'digest/md5'


#users = [ "mihawksrv", "qwnu", "qwnuposter", "pauldevqw", "paulkibito" ]


# WRITE COMMANDS as ROLE everyone:
# PING		- reply from central: PONG
# WHO		- reply from everyone: WHO_RE
# C		- reply from central: C 
# PART		- reply from central: SYS Goodbye


# WRITE COMMANDS as ROLE broadcast:
# REQ_BC	- reply from central: BC_ID
# BC_RE

# WRITE COMMANDS as ROLE adminspecbots:
# REQ_ASSIGN	- reply from specbot: assign_re..
# REQ_UNASSIGN	- reply from specbot: unassign_re..
# REQ_PING	- reply from specbots: ping_re..
# REQ_ASSIGNMENTS	- reply from specbot: assignments_re..

# WRITE COMMANDS as ROLE specbot:
# ASSIGN_RE
# UNASSIGN_RE
# PING_RE
# ASSIGNMENTS_RE

# USERS: ROLE
# paulkibito: broadcast
# qwnu: broadcast
# mihawk: broadcast specbot
# pauldevqw: broadcast specbot
# qwsbalance: adminspecbots
#
# .. allowed commands .. ROLES = CAPABILITIES
# normal users have ROLE broadcast. Roles are defined on a per-user basis .. in a config.


STDOUT.sync = true
 
raise "ARGV[0] must be a userstring - no numbers!" unless ARGV[0] =~ /^[a-zA-Z\._]+$/

$user = "%s" % [ARGV[0]]

$broadcasts = Hash.new

$debug = 0

def put_debug(msg)
	
	if $debug == 1
		puts msg
	end
end

def put_log(msg)
	puts "#{Time.now.strftime("%Y-%m-%d %H:%M:%S %z")}: #{msg}"
end

# consuming process with a loop
def consuming(user)
	put_log "SYS Starting consuming/reading thread\n"
	client = Stomp::Connection.new("", "", "localhost", 61613, true)
	client.subscribe("/topic/messages")
	client.subscribe("/topic/#{user}-replies")
	loop do
		begin
			msg = client.receive
			if not msg.body =~ /^[\d]+ #{user}:/
				put_debug "DEBUG: #{msg.body}"
				message = msg.body

				regex = Regexp.new('^(\d+) ([a-zA-Z_\.]+):[ ,](([a-zA-Z_]+)[ ,](.*))$')
				msg_array = message.scan(regex)
				put_debug "msg.headers #{msg.headers["reply-to"]}"
				put_debug "msg_array #{msg_array}"

				m_time = msg_array[0][0]
				m_user = msg_array[0][1]
				m_msg  = msg_array[0][2]
				m_cmd  = msg_array[0][3]
				m_pload= msg_array[0][4]

				if m_cmd =~ /^JOIN/
					put_log "JOINED User '#{m_user}' just joined the party."

				elsif m_cmd =~ /^C/
					put_log "C #{m_user}: #{m_pload}"

				elsif m_cmd =~ /^BC_RE/
					put_log "BC_RE #{m_pload}"

				elsif m_cmd =~ /^BC/
					# we received a broadcast from #{m_user} with a hash. save it for later.
					m_pload =~ /^(.+?) /
					bcid = $1
					#put_log "bcid #{bcid}"
					$broadcasts[bcid] = m_user

					# give sth to the client to process.
					put_log "BC #{m_pload}"

					#sending a fake reply.
					if $user == "paulfakereply"
						put_log "debug: sending fake reply to #{m_user}"
						send("/topic/#{m_user}-replies", "BC_RE #{bcid} Squirrels=2,Nuts=5")
					end

				elsif m_cmd =~ /^WHO_RE/
					put_log "WHO_RE '#{m_user}' with ROLES: xyz,xyz in the house."

				elsif m_cmd =~ /^WHO/
					reply_to_msg(msg, "WHO_RE #{user} is online.")

				elsif m_cmd =~ /^PART/
					put_log "PARTED User '#{m_user}' just left the party."

				else
					put_log "dbg: #{m_cmd}"

				end

			else
				put_debug "RECEIVED from myself. Ignoring."
			end

			rescue
				put_debug "hum?"
			retry
	
		end
	end
end

def reply_to_msg(msg, payload)
	if msg.headers["reply-to"]
		send(msg.headers["reply-to"], payload)
	end
end

def send(path, inputmsg, *header)
	begin
	finalmessage = ""
	  Timeout::timeout(2) do
	    stomp = Stomp::Client.new("", "", "localhost", 61613)
	    finalmessage = "%d %s: %s" % [Time.now.utc.to_i, $user, inputmsg]
            if header != ""
	    	stomp.publish(path, finalmessage, *header)
            else
	    	stomp.publish(path, finalmessage)
	    end
	    stomp.close
	  end
	  rescue Timeout::Error
	    put_debug "Failed to send within the 2 second timeout"
	    exit 1
	  else
	    put_debug "SENT: #{finalmessage}"
	end
end



put_log "HELLO Hi user '#{$user}'! How are you?"
send("/topic/messages", "JOIN Hi guys, I'm user '#{$user}'.")


thread_consuming = Thread.new {consuming $user}

#put_log "SYS Going into input loop"

inputmessage = ""
while inputmessage != "PART" 
	inputmessage = ""
	inputmessage = STDIN.gets.chomp

	if inputmessage =~ /^(PING)$/
		put_log "PONG"

	elsif inputmessage =~ /^(REQ_BC)/

		inputmessage =~ /^(REQ_BC)[ ,](.+),(.+),(.+),'(.+)','(.+)'$/
		#                            n    f    s     ni     txt

		error = 0
		# $&
		# The string matched by the last successful pattern match in this scope, or nil if the last pattern match failed. (Mnemonic: like & in some editors.) This variable is read-only.
		if $& == nil
			put_log "SYS Command format is REQ_BC <network>,<frequency>,<source/channel>,'<nickname>','<message>'"
			error = 1
		else
			command = "BC"
			network = $2
			freqname = $3
			source = $4
			nickname = $5
			text = $6

			if network =~ /^(QWalt)|(QDEV)/
			else
				put_log "SYS Network name #{network} is unknown: QWalt or QDEV allowed."
				error = 1
			end

			if freqname =~ /^(-qw-)|(-spam-)|(-dev-)/
			else
				put_log "SYS Frequency name is unknown #{freqname}"
				error = 1
			end

			if source =~ /^(#.+)|(qw:\/\/)|(http:\/\/)/
			else
				put_log "SYS Source string is not in the form ^(#.+)|(qw:\/\/)|(http:\/\/)  was: #{source}"
				error = 1
			end

			if nickname =~ /^.+/ 
			else
				put_log "SYS Nickname string is not in the form ^.+  #{nickname}"
				error = 1
			end

			if text =~ /^.+/
			else
				put_log "SYS Message string is not in the form ^.+ #{text}"
				error = 1
			end
		end

		if error == 0
			finalmessage = "%s network:%s frequency:%s source:%s nickname:%s message:%s" % [command, network, freqname, source, nickname, text]

			# building hash here (bcid)
			bcid = Digest::MD5.hexdigest("%d %s %s %s %s %s" % [Time.now.utc.to_i, network, freqname, source, nickname, text])
			#bcid = OpenSSL::Digest::MD5.hexdigest("%d %s %s %s %s %s" % [Time.now.utc.to_i, network, freqname, source, nickname, text])

			finalmessage = "%s %s %s,%s,%s,'%s','%s'" % [command, bcid, network, freqname, source, nickname, text]
			#finalmessage = "%s" % [inputmessage]
			send("/topic/messages", finalmessage)
			put_log "BC_ID #{bcid} for: #{network},#{freqname},#{source}"

		end
	
	
	elsif inputmessage =~ /^(BC_RE)/ 

		inputmessage =~ /^(BC_RE) (.+) (.+)=(\d+),(.+)=(\d+)$/
		if $& == nil
			put_log "SYS Format is BC_RE <bcid> <userstring>=<usercount>,<itemstring>=<itemcount>"
		else
			command = $1
			bcid = $2
			user_string = $3
			user_count = $4
			item_string = $5
			item_count = $6


			finalmessage = "%s %s %s=%d,%s=%d" % [command, bcid, user_string, user_count, item_string, item_count]
			# according bcid it is possible to get the originating user.. so send only to his topic!

			if $broadcasts[bcid]
				to_user = $broadcasts[bcid]
				put_log "SYS Broadcast reply bcid: #{bcid} underway. To: '#{to_user}'."
				send("/topic/#{to_user}-replies", finalmessage)
			else
				put_log "SYS Broadcast reply bcid: #{bcid} underway."
				send("/topic/messages", finalmessage)
			end


		end
		

	elsif inputmessage =~ /^(C)/ 

		inputmessage =~ /^(C) (.+)$/
		error = 0
		if $& == nil
			put_log "SYS Format is C <chattext>"
			error = 1
		else
			put_log "C #{$user}: #{$2}"
			send("/topic/messages", "C #{$2}")
		end


	elsif inputmessage =~ /^(PART)$/
		put_log "SYS Goodbye '#{$user}'."
		send("/topic/messages", "PART The party was fun.")

	elsif inputmessage =~ /^(WHO)/
		put_log "SYS Asking who's here."
		send("/topic/messages", "WHO is here?", "reply-to" => "/topic/#{$user}-replies")
	else
		put_log "SYS Not a known command, #{inputmessage}, possible commands are:"
		put_log "SYS 'C' 'REQ_BC' 'BC_RE' 'WHO' 'PING' or 'PART'"
	end

#	puts "%d: " % [Time.now.utc.to_i]
	#frequency = "-qw-" #inputmessage
	#channel = "#qwnet" #inputmessage
	#nickname = user
	#message = inputmessage
	#find type of message?
	#validate message against that type ..
	#then send in a format.

	#client sending message and awaiting replies
	#stomp.subscribe("/temp-queue/random_replies")
	#stomp.publish("/queue/random_generator", "random", {"reply-to" => "/temp-queue/random_replies"})
	#Timeout::timeout(2) do
	#  msg = stomp.receive
	#  puts "Got the response: #{msg.body}"    
	#end
	#
	#stomp.publish(msg.headers["reply-to"], number)
	#
	#

end