import asyncio
import json
from typing import Mapping, Optional, Union

import discord
import websockets
from discord.ext import tasks
from pydactyl import PterodactylClient
from redbot.core import app_commands, commands
from redbot.core.app_commands import Choice
from redbot.core.bot import Red
from redbot.core.utils.chat_formatting import box, error
from redbot.core.utils.views import ConfirmView

from pterodactyl import mcsrvstatus
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
        self.retry_counter: int = 0
        register_config(config)
        self.task = self.get_task()
        self.update_topic.start()

    async def cog_unload(self) -> None:
        self.update_topic.cancel()
        self.task.cancel()
        self.retry_counter = 0
        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:
            logger.info("WebSocket task has been cancelled.")
        except Exception as e: # pylint: disable=broad-exception-caught
            logger.error("WebSocket task has failed: %s", e, exc_info=e)
            self.task.cancel()
            if self.retry_counter < 5:
                self.retry_counter += 1
                logger.info("Retrying in %s seconds...", 5 * self.retry_counter)
                self.task = self.bot.loop.call_later(5 * self.retry_counter, self.get_task)
            else:
                logger.info("Retry limit reached. Stopping task.")

    @tasks.loop(minutes=6)
    async def update_topic(self):
        topic = await self.get_topic()
        console = self.bot.get_channel(await config.console_channel())
        chat = self.bot.get_channel(await config.chat_channel())
        if console:
            await console.edit(topic=topic)
        if chat:
            await chat.edit(topic=topic)

    @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]}", allowed_mentions=discord.AllowedMentions.none())
            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.retry_counter = 0
                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]}", allowed_mentions=discord.AllowedMentions.none())
            msg = json.dumps({"event": "send command", "args": [await self.get_chat_command(message)]})
            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.retry_counter = 0
                self.task = self.get_task()

    async def get_topic(self) -> str:
        topic: str = await config.topic()
        placeholders = {
            "H": await config.topic_hostname() or "unset",
            "O": str(await config.topic_port()),
        }
        if await config.api_endpoint() == "minecraft":
            status, response = await mcsrvstatus.get_status(await config.topic_hostname(), await config.topic_port())
            if status:
                placeholders.update({
                    "I": response['ip'],
                    "M": str(response['players']['max']),
                    "P": str(response['players']['online']),
                    "V": response['version'],
                    "D": response['motd']['clean'][0] if response['motd']['clean'] else "unset",
                })
            else:
                placeholders.update({
                    "I": response['ip'],
                    "M": "0",
                    "P": "0",
                    "V": "Server Offline",
                    "D": "Server Offline",
                })
        for key, value in placeholders.items():
            topic = topic.replace('.$' + key, value)
        return topic

    async def get_chat_command(self, message: discord.Message) -> str:
        command: str = await config.chat_command()
        placeholders = {
            "C": str(message.author.color),
            "D": message.author.discriminator,
            "I": str(message.author.id),
            "M": message.content.replace('"',''),
            "N": message.author.display_name,
            "U": message.author.name,
            "V": await config.invite() or "use [p]pterodactyl config invite to change me",
        }
        for key, value in placeholders.items():
            command = command.replace('.$' + key, value)
        return command

    async def power(self, ctx: Union[discord.Interaction, commands.Context], action: str, action_ing: str, warning: str = '') -> None:
        if isinstance(ctx, discord.Interaction):
            author = ctx.user
        else:
            author = ctx.author

        current_status = await config.current_status()

        if current_status == action_ing:
            if isinstance(ctx, discord.Interaction):
                return await ctx.response.send_message(f"Server is already {action_ing}.", ephemeral=True)
            return await ctx.send(f"Server is already {action_ing}.")

        if current_status in ["starting", "stopping"] and action != "kill":
            if isinstance(ctx, discord.Interaction):
                return await ctx.response.send_message("Another power action is already in progress.", ephemeral=True)
            return await ctx.send("Another power action is already in progress.")

        view = ConfirmView(author, disable_buttons=True)

        if isinstance(ctx, discord.Interaction):
            await ctx.response.send_message(f"{warning}Are you sure you want to {action} the server?", view=view)
        else:
            message = await ctx.send(f"{warning}Are you sure you want to {action} the server?", view=view)

        await view.wait()

        if view.result is True:
            if isinstance(ctx, discord.Interaction):
                await ctx.edit_original_response(content=f"Sending websocket command to {action} server...", view=None)
            else:
                await message.edit(content=f"Sending websocket command to {action} server...", view=None)

            await self.websocket.send(json.dumps({"event": "set state", "args": [action]}))

            if isinstance(ctx, discord.Interaction):
                await ctx.edit_original_response(content=f"Server {action_ing}", view=None)
            else:
                await message.edit(content=f"Server {action_ing}", view=None)

        else:
            if isinstance(ctx, discord.Interaction):
                await ctx.edit_original_response(content="Cancelled.", view=None)
            else:
                await message.edit(content="Cancelled.", view=None)

    async def send_command(self, ctx: Union[discord.Interaction, commands.Context], command: str):
        channel = self.bot.get_channel(await config.console_channel())
        if isinstance(ctx, discord.Interaction):
            if channel:
                await channel.send(f"Received console command from {ctx.user.id}: {command[:1900]}", allowed_mentions=discord.AllowedMentions.none())
            try:
                await self.websocket.send(json.dumps({"event": "send command", "args": [command]}))
                await ctx.response.send_message(f"Command sent to server. {box(command, 'json')}", ephemeral=True)
            except websockets.exceptions.ConnectionClosed as e:
                logger.error("WebSocket connection closed: %s", e)
                await ctx.response.send_message(error("WebSocket connection closed."))
                self.task.cancel()
                self.retry_counter = 0
                self.task = self.get_task()
        else:
            if channel:
                await channel.send(f"Received console command from {ctx.author.id}: {command[:1900]}", allowed_mentions=discord.AllowedMentions.none())
            try:
                await self.websocket.send(json.dumps({"event": "send command", "args": [command]}))
                await ctx.send(f"Command sent to server. {box(command, 'json')}")
            except websockets.exceptions.ConnectionClosed as e:
                logger.error("WebSocket connection closed: %s", e)
                await ctx.send(error("WebSocket connection closed."))
                self.task.cancel()
                self.retry_counter = 0
                self.task = self.get_task()

    @commands.Cog.listener()
    async def on_red_api_tokens_update(self, service_name: str, api_tokens: Mapping[str,str]): # pylint: disable=unused-argument
        if service_name == "pterodactyl":
            logger.info("Configuration value set: api_key\nRestarting task...")
            self.task.cancel()
            self.retry_counter = 0
            self.task = self.get_task()

    slash_pterodactyl = app_commands.Group(name="pterodactyl", description="Pterodactyl allows you to manage your Pterodactyl Panel from Discord.")

    @slash_pterodactyl.command(name = "command", description = "Send a command to the server console.")
    async def slash_pterodactyl_command(self, interaction: discord.Interaction, command: str) -> None:
        """Send a command to the server console.

        Parameters:
        -----------
        command: str
            The command to send to the server."""
        return await self.send_command(interaction, command)

    @slash_pterodactyl.command(name = "power", description = "Send power actions to the server.")
    @app_commands.choices(action=[
        Choice(name="Start", value="start"),
        Choice(name="Stop", value="stop"),
        Choice(name="Restart", value="restart"),
        Choice(name="⚠️ Kill ⚠️", value="kill")
    ])
    async def slash_pterodactyl_power(self, interaction: discord.Interaction, action: app_commands.Choice[str]) -> None:
        """Send power actions to the server.

        Parameters:
        -----------
        action: app_commands.Choice[str]
            The action to perform on the server."""
        if action.value == "kill":
            return await self.power(interaction, action.value, "stopping... (forcefully killed)", warning="**⚠️ Forcefully killing the server process can corrupt data in some cases. ⚠️**\n")
        if action.value == "stop":
            return await self.power(interaction, action.value, "stopping...")
        return await self.power(interaction, action.value, f"{action.value}ing...")

    @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.command(name = "command", aliases = ["cmd", "execute", "exec"])
    @commands.admin()
    async def pterodactyl_command(self, ctx: commands.Context, *, command: str) -> None:
        """Send a command to the server console."""
        return await self.send_command(ctx, command)

    @pterodactyl.group(autohelp = True, name = "power")
    @commands.admin()
    async def pterodactyl_power(self, ctx: commands.Context) -> None:
        """Send power actions to the server."""

    @pterodactyl_power.command(name = "start")
    async def pterodactyl_power_start(self, ctx: commands.Context) -> Optional[discord.Message]:
        """Start the server."""
        return await self.power(ctx, "start", "starting...")

    @pterodactyl_power.command(name = "stop")
    async def pterodactyl_power_stop(self, ctx: commands.Context) -> Optional[discord.Message]:
        """Stop the server."""
        return await self.power(ctx, "stop", "stopping...")

    @pterodactyl_power.command(name = "restart")
    async def pterodactyl_power_restart(self, ctx: commands.Context) -> Optional[discord.Message]:
        """Restart the server."""
        return await self.power(ctx, "restart", "restarting...")

    @pterodactyl_power.command(name = "kill")
    async def pterodactyl_power_kill(self, ctx: commands.Context) -> Optional[discord.Message]:
        """Kill the server."""
        return await self.power(ctx, "kill", "stopping... (forcefully killed)", warning="**⚠️ Forcefully killing the server process can corrupt data in some cases. ⚠️**\n")

    @pterodactyl.group(autohelp = True, name = "config", aliases = ["settings", "set"])
    @commands.is_owner()
    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:
        """Set the base URL of your Pterodactyl Panel.

        Please include the protocol (http/https).
        Example: `https://panel.example.com`"""
        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.retry_counter = 0
        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 ID of your server."""
        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.retry_counter = 0
        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.command(name = "invite")
    async def pterodactyl_config_invite(self, ctx: commands.Context, invite: str) -> None:
        """Set the invite link for your server."""
        await config.invite.set(invite)
        await ctx.send(f"Invite link set to {invite}")

    @pterodactyl_config.group(name = "topic")
    async def pterodactyl_config_topic(self, ctx: commands.Context):
        """Set the topic for the console and chat channels."""

    @pterodactyl_config_topic.command(name = "host", aliases = ["hostname", "ip"])
    async def pterodactyl_config_topic_host(self, ctx: commands.Context, host: str) -> None:
        """Set the hostname or IP address of your server."""
        await config.topic_hostname.set(host)
        await ctx.send(f"Hostname/IP set to `{host}`")

    @pterodactyl_config_topic.command(name = "port")
    async def pterodactyl_config_topic_port(self, ctx: commands.Context, port: int) -> None:
        """Set the port of your server."""
        await config.topic_port.set(port)
        await ctx.send(f"Port set to `{port}`")

    @pterodactyl_config_topic.command(name = "text")
    async def pterodactyl_config_topic_text(self, ctx: commands.Context, *, text: str) -> None:
        """Set the text for the console and chat channels.

        Available placeholders:
        - `.$H` (hostname)
        - `.$O` (port)
        Available for Minecraft servers:
        - `.$I` (ip)
        - `.$M` (max players)
        - `.$P` (players online)
        - `.$V` (version)
        - `.$D` (description / Message of the Day)"""
        await config.topic.set(text)
        await ctx.send(f"Topic set to:\n{box(text, 'yaml')}")

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

        Required placeholders: `.$U` (username), `.$M` (message), `.$C` (color)
        See [documentation](https://seacogs.coastalcommits.com/pterodactyl/setup/#changing-the-tellraw-command) for more information."""
        await config.chat_command.set(command)
        await ctx.send(f"Chat command set to:\n{box(command, 'json')}")

    @pterodactyl_config.group(name = "regex")
    async def pterodactyl_config_regex(self, ctx: commands.Context) -> None:
        """Set regex patterns."""

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

        See [documentation](https://seacogs.coastalcommits.com/pterodactyl/setup/#my-chat-messages-arent-detected) for more information."""
        await config.chat_regex.set(regex)
        await ctx.send(f"Chat regex set to:\n{box(regex, 'regex')}")

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

        See [documentation](https://seacogs.coastalcommits.com/pterodactyl/setup/#my-chat-messages-arent-detected) for more information."""
        await config.server_regex.set(regex)
        await ctx.send(f"Server regex set to:\n{box(regex, 'regex')}")

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

        See [documentation](https://seacogs.coastalcommits.com/pterodactyl/setup/#my-chat-messages-arent-detected) for more information."""
        await config.join_regex.set(regex)
        await ctx.send(f"Join regex set to:\n{box(regex, 'regex')}")

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

        See [documentation](https://seacogs.coastalcommits.com/pterodactyl/setup/#my-chat-messages-arent-detected) for more information."""
        await config.leave_regex.set(regex)
        await ctx.send(f"Leave regex set to:\n{box(regex, 'regex')}")

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

        See [documentation](https://seacogs.coastalcommits.com/pterodactyl/setup/#my-chat-messages-arent-detected) for more information."""
        await config.achievement_regex.set(regex)
        await ctx.send(f"Achievement regex set to:\n{box(regex, 'regex')}")

    @pterodactyl_config.group(name = "messages", aliases = ['msg', 'msgs', 'message'])
    async def pterodactyl_config_messages(self, ctx: commands.Context):
        """Configure message settings."""

    @pterodactyl_config_messages.command(name = "startup")
    async def pterodactyl_config_messages_startup(self, ctx: commands.Context, *, message: str) -> None:
        """Set the message that will be sent when the server starts."""
        await config.startup_msg.set(message)
        await ctx.send(f"Startup message set to: {message}")

    @pterodactyl_config_messages.command(name = "shutdown")
    async def pterodactyl_config_messages_shutdown(self, ctx: commands.Context, *, message: str) -> None:
        """Set the message that will be sent when the server stops."""
        await config.shutdown_msg.set(message)
        await ctx.send(f"Shutdown message set to: {message}")

    @pterodactyl_config_messages.command(name = "join")
    async def pterodactyl_config_messages_join(self, ctx: commands.Context, *, message: str) -> None:
        """Set the message that will be sent when a user joins the server. This is only shown in embeds."""
        await config.join_msg.set(message)
        await ctx.send(f"Join message set to: {message}")

    @pterodactyl_config_messages.command(name = "leave")
    async def pterodactyl_config_messages_leave(self, ctx: commands.Context, *, message: str) -> None:
        """Set the message that will be sent when a user leaves the server. This is only shown in embeds."""
        await config.leave_msg.set(message)
        await ctx.send(f"Leave message set to: {message}")

    @pterodactyl_config.command(name = "ip")
    async def pterodactyl_config_mask_ip(self, ctx: commands.Context, mask: bool) -> None:
        """Mask the IP addresses of users in console messages."""
        await config.mask_ip.set(mask)
        await ctx.send(f"IP masking set to {mask}")

    @pterodactyl_config.command(name = "api")
    async def pterodactyl_config_api(self, ctx: commands.Context, endpoint: str) -> None:
        """Set the API endpoint for retrieving user avatars.

        This is only used for retrieving user avatars for webhook messages.
        See [PlayerDB](https://playerdb.co/) for valid endpoints. Usually, you should leave this as default."""
        await config.api_endpoint.set(endpoint)
        await ctx.send(f"API endpoint set to {endpoint}")

    @pterodactyl_config_regex.group(name = "blacklist", aliases = ['block', 'blocklist'],)
    async def pterodactyl_config_regex_blacklist(self, ctx: commands.Context):
        """Blacklist regex patterns."""

    @pterodactyl_config_regex_blacklist.command(name = "add")
    async def pterodactyl_config_regex_blacklist_add(self, ctx: commands.Context, name: str, *, regex: str) -> None:
        """Add a regex pattern to the blacklist."""
        async with config.regex_blacklist() as blacklist:
            blacklist: dict
            if name not in blacklist:
                blacklist.update({name: regex})
                await ctx.send(f"Added `{name}` to the regex blacklist.\n{box(regex, 're')}")
            else:
                view = ConfirmView(ctx.author, disable_buttons=True)
                msg = await ctx.send(f"Name `{name}` already exists in the blacklist. Would you like to update it? Current value:\n{box(blacklist[name], 're')}", view=view)
                await view.wait()
                if view.result is True:
                    blacklist.update({name: regex})
                    await msg.edit(f"Updated `{name}` in the regex blacklist.\n{box(regex, 're')}")
                else:
                    await msg.edit(content="Cancelled.")

    @pterodactyl_config_regex_blacklist.command(name = "remove")
    async def pterodactyl_config_regex_blacklist_remove(self, ctx: commands.Context, name: str) -> None:
        """Remove a regex pattern from the blacklist."""
        async with config.regex_blacklist() as blacklist:
            blacklist: dict
            if name in blacklist:
                view = ConfirmView(ctx.author, disable_buttons=True)
                msg = await ctx.send(f"Are you sure you want to remove `{name}` from the regex blacklist?\n{box(blacklist[name], 're')}", view=view)
                await view.wait()
                if view.result is True:
                    del blacklist[name]
                    await msg.edit(content="Removed `{name}` from the regex blacklist.")
                else:
                    await msg.edit(content="Cancelled.")
            else:
                await ctx.send(f"Name `{name}` does not exist in the blacklist.")

    @pterodactyl_config.command(name = 'view', aliases = ['show'])
    async def pterodactyl_config_view(self, ctx: commands.Context) -> None:
        """View the current configuration."""
        base_url = await config.base_url()
        server_id = await config.server_id()
        console_channel = await config.console_channel()
        chat_channel = await config.chat_channel()
        chat_command = await config.chat_command()
        chat_regex = await config.chat_regex()
        server_regex = await config.server_regex()
        join_regex = await config.join_regex()
        leave_regex = await config.leave_regex()
        achievement_regex = await config.achievement_regex()
        startup_msg = await config.startup_msg()
        shutdown_msg = await config.shutdown_msg()
        join_msg = await config.join_msg()
        leave_msg = await config.leave_msg()
        mask_ip = await config.mask_ip()
        api_endpoint = await config.api_endpoint()
        invite = await config.invite()
        regex_blacklist: dict = await config.regex_blacklist()
        topic_text = await config.topic()
        topic_hostname = await config.topic_hostname()
        topic_port = await config.topic_port()
        embed = discord.Embed(color = await ctx.embed_color(), title="Pterodactyl Configuration")
        embed.description = f"""**Base URL:** {base_url}
                       **Server ID:** `{server_id}`
                       **Console Channel:** <#{console_channel}>
                       **Chat Channel:** <#{chat_channel}>
                       **Startup Message:** {startup_msg}
                       **Shutdown Message:** {shutdown_msg}
                       **Join Message:** {join_msg}
                       **Leave Message:** {leave_msg}
                       **Mask IP:** {self.get_bool_str(mask_ip)}
                       **API Endpoint:** `{api_endpoint}`
                       **Invite:** {invite}

                        **Topic Hostname:** `{topic_hostname}`
                        **Topic Port:** `{topic_port}`
                        **Topic Text:** {box(topic_text, 'yaml')}

                       **Chat Command:** {box(chat_command, 'json')}
                       **Chat Regex:** {box(chat_regex, 're')}
                       **Server Regex:** {box(server_regex, 're')}
                       **Join Regex:** {box(join_regex, 're')}
                       **Leave Regex:** {box(leave_regex, 're')}
                       **Achievement Regex:** {box(achievement_regex, 're')}"""
        await ctx.send(embed=embed)
        if not len(regex_blacklist) == 0:
            regex_blacklist_embed = discord.Embed(color = await ctx.embed_color(), title="Regex Blacklist")
            for name, regex in regex_blacklist.items():
                regex_blacklist_embed.add_field(name=name, value=box(regex, 're'), inline=False)
            await ctx.send(embed=regex_blacklist_embed)

    def get_bool_str(self, inp: bool) -> str:
        """Return a string representation of a boolean."""
        return "Enabled" if inp else "Disabled"