import asyncio
import os
import threading
from threading import Event
from typing import Optional

import discord
import gradio as gr
from discord import Permissions
from discord.ext import commands
from discord.utils import oauth_url

import gradio_client as grc
from gradio_client.utils import QueueError

event = Event()

## DISCORD - BOT TOKEN - Secret Vaiable ##
DISCORD_TOKEN = os.getenv("DISCORD_TOKEN")

async def wait(job):
    while not job.done():
        await asyncio.sleep(0.2)

# HG SPACE URL from GRADIO UI from Get API page + HF_TOKEN in seceret variable #
def get_client(session: Optional[str] = None) -> grc.Client:
    client = grc.Client("https://cryptoscoutv1-discord-cs-pm-chatbot.hf.space", hf_token=os.getenv("HF_TOKEN"))
    if session:
        client.session_hash = session
    return client

def truncate_response(response: str) -> str:
    ending = "...\nTruncating response to 2000 characters due to discord api limits."
    if len(response) > 2000:
        return response[: 2000 - len(ending)] + ending
    else:
        return response

intents = discord.Intents.default()
intents.message_content = True
bot = commands.Bot(command_prefix="/", intents=intents)



## BOT COMMANDS ##

@bot.event
async def on_ready():
    print(f"Logged in as {bot.user} (ID: {bot.user.id})")
    synced = await bot.tree.sync()
    print(f"Synced commands: {', '.join([s.name for s in synced])}.")
    event.set()
    print("------")

    # Generate OAuth URL when the bot is ready
    permissions = Permissions(326417525824)
    url = oauth_url(bot.user.id, permissions=permissions)
    print(f"Add this bot to your server by clicking this link: {url}")

thread_to_client = {}
thread_to_user = {}

## /echo command to return the llm repsonse ##

@bot.hybrid_command(name="echo", description="Enter some text to chat with the bot! Like this: /echo Hello, how are you?")
async def chat(ctx, prompt: str):
    if ctx.author.id == bot.user.id:
        return
    try:
        # Acknowledge the command immediately - This is the discord message after the command / is called ##
        await ctx.send("Processing your request...")

        loop = asyncio.get_running_loop()
        client = await loop.run_in_executor(None, get_client, None)
        job = client.submit(prompt, api_name="/chat") ## /predict can be used for gradio interface ##
        await wait(job)

        try:
            job.result()
            response = job.outputs()[-1]
            await ctx.send(truncate_response(response))  # Send the LLM response
        except QueueError:
            await ctx.send("The gradio space powering this bot is really busy! Please try again later!")
    except Exception as e:
        print(f"{e}")

@bot.hybrid_command(name="cshelp", description="Get information on how to use this bot.")
async def help_command(ctx):
    help_message = """
    **How to Use This Bot**
    - Use `/echo your_message` to interact with the bot.
    - Your message will be processed, and you will get a response.
    - If you need any assistance, contact the server admins.
    """
    await ctx.send(help_message)

@bot.event
async def on_message(message):
    if message.author.bot:
        return

    if message.content.startswith(bot.command_prefix):
        await bot.process_commands(message)

def run_bot():
    if not DISCORD_TOKEN:
        print("DISCORD_TOKEN NOT SET")
        event.set()
    else:
        bot.run(DISCORD_TOKEN)

threading.Thread(target=run_bot).start()

event.wait()
if not DISCORD_TOKEN:
    welcome_message = """
    ## You have not specified a DISCORD_TOKEN, which means you have not created a bot account. Please follow these steps:
    ### 1. Go to https://discord.com/developers/applications and click 'New Application'
    
    ### 2. Give your bot a name 🤖
    ![](https://gradio-builds.s3.amazonaws.com/demo-files/discordbots/BotName.png)
    
    ## 3. In Settings > Bot, click the 'Reset Token' button to get a new token. Write it down and keep it safe 🔐
    
    ![](https://gradio-builds.s3.amazonaws.com/demo-files/discordbots/ResetToken.png)
    
    ## 4. Optionally make the bot public if you want anyone to be able to add it to their servers
    
    ## 5. Scroll down and enable 'Message Content Intent' under 'Priviledged Gateway Intents'
    
    ![](https://gradio-builds.s3.amazonaws.com/demo-files/discordbots/MessageContentIntent.png)
    ## 6. Save your changes!
    ## 7. The token from step 3 is the DISCORD_TOKEN. Rerun the deploy_discord command, e.g client.deploy_discord(discord_bot_token=DISCORD_TOKEN, ...), or add the token as a space secret manually.
"""
else:
    permissions = Permissions(326417525824)
    url = oauth_url(bot.user.id, permissions=permissions)
    welcome_message = f"""
    ## Add this bot to your server by clicking this link: 
    
    {url}
    ## How to use it?
    The bot can be triggered via `!echo` followed by your text prompt.
    ## Enabling slash commands
    If you are the owner of this bot, call the `!sync` command from your discord server.
    This will allow anyone in your server to call the bot via `/echo`.
    This is known as a slash command and is a nicer experience than calling the bot via `!echo`.
    
    After calling `!sync`, it may take a few minutes for `/echo` to be recognized as a valid command
    in your server.
    ⚠️ Note ⚠️: It is best to create a separate bot per command if you intend to use slash commands. Also make sure
    none of your bots have matching command names. 
    """


with gr.Blocks() as demo:
    gr.Markdown(
        f"""
    # Discord bot of CryptoSearch Portfolio Managment - Discord_CS_PM_Chatbot
    {welcome_message}
    """
    )
demo.launch()