import teambot, sys, tasks, json
import os.path as fs

def loadSubscribers():
	if not fs.exists("subscribers.json"):
		return []
	with open("subscribers.json") as f:
		return json.load(f)["subscribers"]

def saveSubscribers(subscribers):
	with open("subscribers.json","w") as f:
		return json.dump(dict(subscribers=subscribers),f)

class RadioBot(teambot.Handler):
	def __init__(self,*args):
		super(RadioBot,self).__init__(*args)
		self.tasks = tasks.TaskPool(handler=self)
		self.tasks.add_coroutine(self.check_nowplaying,1,dict(dj_live=False,dj=None,song="",listeners=0))
		self.channels = [x.split()[0] for x in self._bot.chanlist]
		self.subscribers = loadSubscribers()
		self.tasks.run()
	def check_nowplaying(self,state,basestate):
		if not hasattr(self._bot,"conn"):
			return {}
		bot = basestate["handler"]
		with open(fs.expanduser("~khuxkm/public_html/radiobot/now_playing.json")) as f:
			resp = json.loads(f.read().rstrip())
			if resp["dj"] is not None and not state.get("dj_live",False):
				state["dj_live"]=True
				notify = [bot.channels[0]]
				notify.extend(self.subscribers)
				for channel in notify:
					bot.say(channel,"{} is now live!".format(resp["dj"]))
				state["dj"] = resp["dj"]
			if resp["dj"] is None and state.get("dj_live",True):
				state["dj_live"]=False
			if resp["song"]!=state.get("song") or resp["listeners"]!=state.get("listeners"):
				bot.say(bot.channels[0],"now playing: {} ({!s} listeners{})".format(resp["song"],resp["listeners"],(", played by "+resp["dj"] if state["dj_live"] else "")))
				state["song"]=resp["song"]
				state["listeners"]=resp["listeners"]
			basestate["handler"].task_state = state
			return state
	def on_pubmsg(self,channel,nick,text):
		if text.startswith(self._bot.bot_nick+": "):
			cmd = text[len(self._bot.bot_nick+": "):].strip()
			if self.event.source.userhost=="khuxkm@sudoers.tilde.team" and cmd=="down":
				self.tasks.stop()
				self._bot.die("Stopping...")
			elif self.event.source.userhost=="khuxkm@sudoers.tilde.team" and cmd=="test":
				notify = [self.channels[0]]
				notify.extend(self.subscribers)
				for channel in notify:
					self.say(channel,"'tis but a test. ignore me")
			elif cmd=="dj":
				if self.task_state["dj_live"]:
					self.say(channel,nick+": {} is the current dj!".format(self.task_state["dj"]))
				else:
					self.say(channel,nick+": nobody is live right now.")
			elif cmd=="np":
				self.say(channel,nick+": now playing: {} ({!s} listeners{})".format(self.task_state["song"],self.task_state["listeners"],(", played by "+self.task_state["dj"] if self.task_state["dj_live"] else "")))
			elif cmd=="subscribe":
				if nick in self.subscribers:
					self.say(channel,nick+": you're already on my list!")
				else:
					self.subscribers.append(nick)
					saveSubscribers(self.subscribers)
					self.say(channel,nick+": I'll notify you when someone goes live!")
			elif cmd=="unsubscribe":
				if nick not in self.subscribers:
					self.say(channel,nick+": you're not on my list!")
				else:
					self.subscribers.remove(nick)
					saveSubscribers(self.subscribers)
					self.say(channel,nick+": I'll leave you alone then.")
			elif cmd=="radio": # joke command
				self.say(channel,"eat the poop or die!!1")
			elif cmd=="paymybills": # joke command
				self.say(channel,"whaddya mean?! i'm broker than you!")
		elif text.strip()=="!botlist":
			self.say(channel,"Maintainer: khuxkm@tilde.team | your friendly neighborhood radio bot | https://tildegit.org/khuxkm/radiobot")

if __name__=="__main__":
	if not fs.exists("channels.txt"):
		print("ERROR: No channels.txt. Use channels.txt.example as an example.")
		sys.exit(1)
	with open("channels.txt") as f:
		channels = [l.rstrip() for l in f if l.rstrip()]
	bot = teambot.TeamBot(channels,"radiobot2","localhost",chandler=RadioBot)
	bot.start()