import asyncio
import json
from typing import Optional

import discord
import websockets
from pydactyl import PterodactylClient
from redbot.core import commands
from redbot.core.bot import Red
from redbot.core.utils.chat_formatting import box

from pterodactyl.config import config, register_config
from pterodactyl.logger import logger


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

    def __init__(self, bot: Red):
        self.bot = bot
        self.client: Optional[PterodactylClient] = None
        self.task: Optional[asyncio.Task] = None
        self.websocket: Optional[websockets.WebSocketClientProtocol] = None
        register_config(config)

    async def cog_load(self) -> None:
        self.task = self.get_task()

    async def cog_unload(self) -> None:
        self.task.cancel()
        await self.client._session.close() # pylint: disable=protected-access

    def get_task(self) -> asyncio.Task:
        from pterodactyl.websocket import establish_websocket_connection
        task = self.bot.loop.create_task(establish_websocket_connection(self), name="Pterodactyl Websocket Connection")
        task.add_done_callback(self.error_callback)
        return task

    def error_callback(self, fut) -> None: #NOTE - Thanks flame442 and zephyrkul for helping me figure this out
        try:
            fut.result()
        except asyncio.CancelledError:
            pass
        except Exception as e: # pylint: disable=broad-exception-caught
            logger.error("WebSocket task has failed: %s", e, exc_info=e)
            self.task.cancel()
            self.task = self.get_task()

    @commands.Cog.listener()
    async def on_message_without_command(self, message: discord.Message) -> None:
        if message.channel.id == await config.console_channel() and message.author.bot is False:
            logger.debug("Received console command from %s: %s", message.author.id, message.content)
            await message.channel.send(f"Received console command from {message.author.id}: {message.content[:1900]}")
            try:
                await self.websocket.send(json.dumps({"event": "send command", "args": [message.content]}))
            except websockets.exceptions.ConnectionClosed as e:
                logger.error("WebSocket connection closed: %s", e)
                self.task.cancel()
                self.task = self.get_task()
        if message.channel.id == await config.chat_channel() and message.author.bot is False:
            logger.debug("Received chat message from %s: %s", message.author.id, message.content)
            channel = self.bot.get_channel(await config.console_channel())
            if channel:
                await channel.send(f"Received chat message from {message.author.id}: {message.content[:1900]}")
            msg = json.dumps({"event": "send command", "args": [await self.get_chat_command(message.author.display_name, message.content, message.author.color)]})
            logger.debug("Sending chat message to server:\n%s", msg)
            try:
                await self.websocket.send(msg)
            except websockets.exceptions.ConnectionClosed as e:
                logger.error("WebSocket connection closed: %s", e)
                self.task.cancel()
                self.task = self.get_task()

    async def get_chat_command(self, username: str, message: str, color: discord.Color) -> str:
        command: str = await config.chat_command()
        command = command.replace(".$U", username).replace(".$M", message).replace(".$C", str(color))
        return command

    @commands.group(autohelp = True, name = "pterodactyl", aliases = ["ptero"])
    async def pterodactyl(self, ctx: commands.Context) -> None:
        """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) -> None:
        """Configure Pterodactyl settings."""

    @pterodactyl_config.command(name = "url")
    async def pterodactyl_config_base_url(self, ctx: commands.Context, *, base_url: str = None) -> None:
        """Set the base URL of your Pterodactyl Panel. Please include the protocol (http/https)."""
        if base_url is None:
            base_url = await config.base_url()
            return await ctx.send(f"Base URL is currently set to {base_url}")
        await config.base_url.set(base_url)
        await ctx.send(f"Base URL set to {base_url}")
        logger.info("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) -> None:
        """Set the API key for your Pterodactyl Panel."""
        await config.api_key.set(api_key)
        await ctx.send(f"API key set to `{api_key[:5]}...{api_key[-4:]}`")
        logger.info("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) -> None:
        """Set the server ID for your Pterodactyl Panel."""
        await config.server_id.set(server_id)
        await ctx.send(f"Server ID set to {server_id}")
        logger.info("Configuration value set: server_id = %s\nRestarting task...", server_id)
        self.task.cancel()
        self.task = self.get_task()

    @pterodactyl_config.command(name = "consolechannel")
    async def pterodactyl_config_console_channel(self, ctx: commands.Context, channel: discord.TextChannel) -> None:
        """Set the channel to send console output to."""
        await config.console_channel.set(channel.id)
        await ctx.send(f"Console channel set to {channel.mention}")

    @pterodactyl_config.group(name = "chat")
    async def pterodactyl_config_chat(self, ctx: commands.Context):
        """Configure chat settings."""

    @pterodactyl_config_chat.command(name = "channel")
    async def pterodactyl_config_chat_channel(self, ctx: commands.Context, channel: discord.TextChannel) -> None:
        """Set the channel to send chat output to."""
        await config.chat_channel.set(channel.id)
        await ctx.send(f"Chat channel set to {channel.mention}")

    @pterodactyl_config_chat.command(name = "regex")
    async def pterodactyl_config_chat_regex(self, ctx: commands.Context, *, regex: str = None) -> None:
        """Set the regex pattern to match chat messages on the server.

        See [documentation]() for more information."""
        #TODO - fix this link
        if regex is None:
            regex = await config.chat_regex()
            return await ctx.send(f"Chat regex is currently set to:\n{box(regex, 'regex')}")
        await config.chat_regex.set(regex)
        await ctx.send(f"Chat regex set to:\n{box(regex, 'regex')}")

    @pterodactyl_config_chat.command(name = "command")
    async def pterodactyl_config_chat_command(self, ctx: commands.Context, *, command: str = None) -> None:
        """Set the command that will be used to send messages from Discord.

        Required placeholders: `.$U` (username), `.$M` (message), `.$C` (color)
        See [documentation]() for more information."""
        #TODO - fix this link
        if command is None:
            command = await config.chat_command()
            return await ctx.send(f"Chat command is currently set to:\n{box(command, 'json')}")
        await config.chat_command.set(command)
        await ctx.send(f"Chat command set to:\n{box(command, 'json')}")

    @pterodactyl_config_chat.command(name = "server")
    async def pterodactyl_config_chat_server(self, ctx: commands.Context, *, regex: str = None) -> None:
        """Set the regex pattern to match server messages on the server.

        See [documentation]() for more information."""
        #TODO - fix this link
        if regex is None:
            regex = await config.server_regex()
            return await ctx.send(f"Server regex is currently set to:\n{box(regex, 'regex')}")
        await config.server_regex.set(regex)
        await ctx.send(f"Server regex set to:\n{box(regex, 'regex')}")