import json
import logging

import discord
import websockets
from pydactyl import PterodactylClient, exceptions
from redbot.core import Config, commands
from redbot.core.bot import Red


class Pterodactyl(commands.Cog):
    """Pterodactyl allows you to manage your Pterodactyl Panel from Discord."""

    def __init__(self, bot: Red):
        self.bot = bot
        self.config = Config.get_conf(self, identifier=457581387213637448123567, force_registration=True)
        self.config.register_global(
            base_url=None,
            api_key=None,
            server_id=None,
            console_channel=None,
            startup_jar=None,
            startup_arguments=None,
            power_action_in_progress=False
        )
        self.logger = logging.getLogger('red.sea.pterodactyl')
        self.client = None
        self.task = None
        self.websocket = None

    async def establish_websocket_connection(self):
        self.logger.debug("Establishing WebSocket connection")
        base_url = await self.config.base_url()
        api_key = await self.config.api_key()
        server_id = await self.config.server_id()

        extra_headers = {
            "origin": base_url
        }

        try:
            client = PterodactylClient(base_url, api_key, debug=True).client
            websocket_credentials = client.servers.get_websocket(server_id)
            self.logger.debug("Websocket connection details retrieved:\nSocket: %s\nToken: %s", websocket_credentials['data']['socket'], websocket_credentials['data']['token'])
        except exceptions.ClientConfigError as e:
            self.logger.error('Failed to initialize Pterodactyl client: %s', e)
            return
        except exceptions.PterodactylApiError as e:
            self.logger.error('Failed to retrieve Pterodactyl websocket: %s', e)
            return

        async for websocket in websockets.connect(websocket_credentials['data']['socket'], extra_headers=extra_headers):
            try:
                self.logger.debug("WebSocket connection established")

                auth_message = json.dumps({"event": "auth", "args": [websocket_credentials['data']['token']]})
                await websocket.send(auth_message)
                self.logger.debug("Authentication message sent")

                self.client = client
                self.websocket = websocket

                while True:
                    message = await websocket.recv()
                    if json.loads(message)['event'] in ['token expiring', 'token expired']:
                        self.logger.debug("Received token expiring/expired event. Refreshing token.")
                        websocket_credentials = client.servers.get_websocket(server_id)
                        auth_message = json.dumps({"event": "auth", "args": [websocket_credentials['data']['token']]})
                        await websocket.send(auth_message)
                        self.logger.debug("Authentication message sent")

                    if json.loads(message)['event'] == 'auth success':
                        self.logger.debug("Authentication successful")

                    if json.loads(message)['event'] == 'console output' and await self.config.console_channel() is not None:
                        channel = self.bot.get_channel(await self.config.console_channel)
                        await channel.send(json.loads(message)['args'][0])
                        #FIXME - Add pagification for long messages to prevent Discord API errors
            except websockets.exceptions.ConnectionClosed as e:
                self.logger.debug("WebSocket connection closed: %s", e)
                websocket_credentials = client.servers.get_websocket(server_id)
                continue

    def get_task(self):
        return self.bot.loop.create_task(self.establish_websocket_connection(), name="Pterodactyl Websocket Connection")

    async def cog_load(self):
        self.task = self.get_task()

    async def cog_unload(self):
        self.task.cancel()
        await self.client._session.close() # pylint: disable=protected-access

    @commands.cog.listener()
    async def on_message(self, message: discord.Message):
        if message.channel.id == await self.config.console_channel():
            self.websocket.send(json.dumps({"event": "send command", "args": [message.content]}))

    @commands.group(autohelp = True, name = "pterodactyl", aliases = ["ptero"])
    async def pterodactyl(self, ctx: commands.Context):
        """Pterodactyl allows you to manage your Pterodactyl Panel from Discord."""

    @pterodactyl.group(autohelp = True, name = "config", aliases = ["settings", "set"])
    async def pterodactyl_config(self, ctx: commands.Context):
        """Configure Pterodactyl settings."""

    @pterodactyl_config.command(name = "url")
    async def pterodactyl_config_base_url(self, ctx: commands.Context, base_url: str):
        """Set the base URL of your Pterodactyl Panel. Please include the protocol (http/https)."""
        await self.config.base_url.set(base_url)
        await ctx.send(f"Base URL set to {base_url}")
        self.logger.debug("Configuration value set: base_url = %s\nRestarting task...", base_url)
        self.task.cancel()
        self.task = self.get_task()

    @pterodactyl_config.command(name = "apikey")
    async def pterodactyl_config_api_key(self, ctx: commands.Context, api_key: str):
        """Set the API key for your Pterodactyl Panel."""
        await self.config.api_key.set(api_key)
        await ctx.send(f"API key set to `{api_key[:5]}...{api_key[-4:]}`")
        self.logger.debug("Configuration value set: api_key = %s\nRestarting task...", api_key)
        self.task.cancel()
        self.task = self.get_task()

    @pterodactyl_config.command(name = "serverid")
    async def pterodactyl_config_server_id(self, ctx: commands.Context, server_id: str):
        """Set the server ID for your Pterodactyl Panel."""
        await self.config.server_id.set(server_id)
        await ctx.send(f"Server ID set to {server_id}")
        self.logger.debug("Configuration value set: server_id = %s\nRestarting task...", server_id)
        self.task.cancel()
        self.task = self.get_task()