"""
Event called when someone joins a channel
"""

import clientPackets
from helpers import consoleHelper
from constants import bcolors
import serverPackets
import glob
import exceptions

def handle(userToken, packetData):
	# Channel join packet
	packetData = clientPackets.channelJoin(packetData)
	joinChannel(userToken, packetData["channel"])

def joinChannel(userToken, channelName):
	'''
	Join a channel

	userToken -- user token object of user that joins the chanlle
	channelName -- name of channel
	'''
	try:
		# Get usertoken data
		username = userToken.username
		userID = userToken.userID
		userRank = userToken.rank

		# Check spectator channel
		# If it's spectator channel, skip checks and list stuff
		if channelName != "#spectator" and channelName != "#multiplayer":
			# Normal channel, do check stuff
			# Make sure the channel exists
			if channelName not in glob.channels.channels:
				raise exceptions.channelUnknownException

			# Check channel permissions
			if glob.channels.channels[channelName].publicRead == False and userRank <= 2:
				raise exceptions.channelNoPermissionsException

			# Add our userID to users in that channel
			glob.channels.channels[channelName].userJoin(userID)

			# Add the channel to our joined channel
			userToken.joinChannel(channelName)

		# Send channel joined
		userToken.enqueue(serverPackets.channelJoinSuccess(userID, channelName))

		# Console output
		consoleHelper.printColored("> {} joined channel {}".format(username, channelName), bcolors.GREEN)
	except exceptions.channelNoPermissionsException:
		consoleHelper.printColored("[!] {} attempted to join channel {}, but they have no read permissions".format(username, channelName), bcolors.RED)
	except exceptions.channelUnknownException:
		consoleHelper.printColored("[!] {} attempted to join an unknown channel ({})".format(username, channelName), bcolors.RED)