#!/usr/bin/env python3

import re
import json
import threading
import requests
import websocket
import time


# WS data to server:   https://github.com/iasoon/pw3-moz2/blob/prototype/src/websocket.rs#L27
# WS data from server: https://github.com/iasoon/pw3-moz2/blob/prototype/src/lobby_manager.rs#L244
# HTTP:                https://github.com/iasoon/pw3-moz2/blob/prototype/src/main.rs#L451

class Lobby:
	"""
	@param url_base: domain name and optionally port and path;
		e.g. example.org:8880/mozaic, mozaic.example.org
	"""
	def __init__(self, lobby_id: str, bot_name: str, token: str, url_base: str, tls: bool=True):
		assert not re.match(r"^[^:]+://", url_base), "url_base should not include protocol"
		assert url_base[-1] != "/", "url_base should not end with /"

		self.lobby_id = lobby_id
		self.bot_name = bot_name
		self.token = token
		self.url_base = url_base
		self.tls = tls

		self.ws = None
		self.thread = None

		self.own_player_id = None
		self.players = None


	@property
	def websocket_url(self):
		return ("wss://" if self.tls else "ws://") + self.url_base + "/websocket"

	@property
	def http_url_base(self):
		return ("https://" if self.tls else "http://") + self.url_base + f"/api/lobbies/{self.lobby_id}"


	def open_websocket(self, on_message, on_error, **kwargs):

		def on_open(ws):
			ws.send(json.dumps({
				"type": "subscribeToLobby",
				"lobbyId": self.lobby_id,
			}))
			ws.send(json.dumps({
				"type": "authenticatePlayer",
				"lobbyId": self.lobby_id,
				"token": self.token,
			}))

		def internal_on_message(ws, msg):
			data = json.loads(msg)

			if data["type"] == "lobbyState":
				self.players = {
					int(player_id): data
					for player_id, data in data["data"]["players"].items()
				}

			on_message(ws, data)

		self.ws = websocket.WebSocketApp(
			self.websocket_url,
			on_open=on_open, on_message=internal_on_message, on_error=on_error, **kwargs
		)

		self.thread = threading.Thread(
			target=self.ws.run_forever
		)
		self.thread.start()


	def _post(self, path, payload, auth=True):
		headers = {
			"user-agent": "mozaicreceptionist/0.0.1"
		}
		if auth:
			headers["authorization"] = f"Bearer {self.token}"

		r = requests.post(self.http_url_base + path, headers=headers, json=payload)
		r.raise_for_status()
		return r


	def join_lobby(self):
		own_player_data = self._post(f"/join", {
			"name": self.bot_name,
			"token": self.token,
		}, auth=False).json()

		self.own_player_id = own_player_data["id"]


	def accept_proposal(self, proposal_id):
		self._post(f"/proposals/{proposal_id}/accept", {"status": "Accepted"})


	@staticmethod
	def from_lobby_url(url, bot_name, token) -> "Lobby":
		"""
		@param url: e.g. https://mozaic.example.org/lobbies/0123456789abcdef0123456789abcdef
		"""
		m = re.fullmatch(r"http(s?)://(.+)/lobbies/([^/]+)", url)
		if not m:
			return ValueError("Unrecognized MOZAIC lobby URL")

		tls = m.group(1) == "s"
		url_base = m.group(2)
		lobby_id = m.group(3)

		return Lobby(lobby_id, bot_name, token, url_base, tls)

def on_error(ws, error):
	__import__("pprint").pprint(error)


if __name__ == "__main__":
	import sys
	lobby_url = sys.argv[1]
	bot_token = sys.argv[2]
	bot_name = " ".join(sys.argv[3:])

	lobby = Lobby.from_lobby_url(
		lobby_url,
		bot_name,
		bot_token
	)
	lobby.join_lobby()

	def can_answer(proposal):
		return proposal["status"] == "pending" and any(
			p["player_id"] == lobby.own_player_id and p["status"] == "Unanswered"
			for p in proposal["players"]
		)

	def owner_participates(proposal):
		owner_id = proposal["owner_id"]
		return owner_id == lobby.own_player_id or any(
			(p["player_id"] == owner_id and p["status"] == "Accepted")
			for p in proposal["players"]
		)

	def accept_if_possible_and_owner_participates(proposal):
		if can_answer(proposal) and owner_participates(proposal):
			proposal_id = proposal["id"]
			owner_name = lobby.players[proposal["owner_id"]]["name"]
			print(f"Accepting proposal from {owner_name}")
			lobby.accept_proposal(proposal_id)

	def on_message(ws, msg):
		if msg["type"] == "proposalData":
			accept_if_possible_and_owner_participates(msg["data"])
		elif msg["type"] == "lobbyState":
			for proposal in msg["data"]["proposals"].values():
				accept_if_possible_and_owner_participates(proposal)

	lobby.open_websocket(on_message, on_error)