import discord
import aiohttp

import ast
import os
import threading

intents = discord.Intents.default()
intents.message_content = True
bot = discord.Bot(intents = intents)
token = os.environ.get('TOKEN_DISCORD')


class Like_Dislike(discord.ui.View):
    @discord.ui.button(style=discord.ButtonStyle.primary, emoji="👍")
    async def like_button(self, button, interaction):
        await interaction.response.send_message("You liked the response")

    @discord.ui.button(style=discord.ButtonStyle.primary, emoji="👎")
    async def dislike_button(self, button, interaction):
        await interaction.response.send_message("You disliked the response")


@bot.event
async def on_ready():
    print(f"{bot.user} is ready and online!")


@bot.slash_command(name="help", description="list of commands and other info.")
async def help(ctx: discord.ApplicationContext):
    await ctx.respond("Hello! FURY Bot responds to all your messages\
                      \n1)Inside Forum channel and\
                      \n2)Those that tag the bot.")


async def llm_output(question: str, context: str) -> str:
    """
    Returns output from the LLM using the given user-question and retrived context
    """

    URL_LLM = 'https://robinroy03-fury-bot.hf.space'
    # URL_LLM = 'http://localhost:11434'    # NOTE: FOR TESTING

    prompt = f"""
    You are a senior FURY developer. FURY is a high level python graphics API similar to VTK.

    Question: {question}

    Context: {context}
    """
    obj = {
            "model": "llama3-70b-8192",
            "prompt": prompt,
            "stream": False
        }

    async with aiohttp.ClientSession() as session:
        async with session.post(URL_LLM + "/api/generate", json=obj) as response:
            if response.status == 500:
                return "Sorry, an internal Error happened. Please try again later.\nError 500."
            response_json = await response.json()

    return response_json['choices'][0]['message']['content']

async def embedding_output(message: str) -> list:
    """
    Returns embeddings for the given message

    rtype: list of embeddings. Length depends on the model.
    """

    URL_EMBEDDING = 'https://robinroy03-fury-embeddings-endpoint.hf.space'

    async with aiohttp.ClientSession() as session:
        async with session.post(URL_EMBEDDING + "/embedding", json={"text": message}) as response:
            response_json = await response.json(content_type=None)
    
    return response_json['output']


async def db_output(embedding: list) -> dict:
    """
    Returns the KNN results.

    rtype: JSON
    """

    URL_DB = 'https://robinroy03-fury-db-endpoint.hf.space'
    
    async with aiohttp.ClientSession() as session:
        async with session.post(URL_DB + "/query", json={"embeddings": embedding}) as response:
            response_json = await response.json()
        
    return response_json


@bot.event
async def on_message(message):
    """
    Returns llm answer with the relevant context.
    """

    if (message.author == bot.user) or not(bot.user.mentioned_in(message)):
        return

    print(message.content)
    await message.reply(content="Your message was received, it'll take around 30 seconds for FURY to process an answer.")

    question = message.content.replace("<@1243428204124045385>", "")
    
    embedding: list = await embedding_output(question)

    db_knn: dict = await db_output(embedding)
    db_context = ""
    references = ""
    for i in range(len(db_knn['matches'])):
        data = db_knn['matches'][i]['metadata']['data']
        db_context += (data + "\n")
        data = ast.literal_eval(data)
        references += ("<https://github.com/fury-gl/fury/tree/master/" + data['path'] + ">").replace("//home/robin/Desktop/l/fury", "")
        if data.get("function_name"):
            references += f"\tFunction Name: {data.get('function_name')}"
        elif data.get("class_name"):
            references += f"\tClass Name: {data.get('class_name')}"
        elif data['type'] == 'rst':
            references += f"\tDocumentation: {data['path'].split("/")[-1]}"
        elif data['type'] == 'documentation_examples':
            references += f"\tDocumentation: {data['path'].split("/")[-1]}"
        references += "\n"

    llm_answer: str = await llm_output(question, db_context)      # for the highest knn result (for the test only right now)  TODO: make this better

    try:
        await message.reply(content=llm_answer[:1990], view=Like_Dislike())             # TODO: handle large responses (>2000)
        await message.reply(content=f"**References**\n{references}")                                  
    except Exception as e:                                                           # TODO: make exception handling better
        print(e)
        await message.reply("An error occurred. Retry again.")

def run_bot():
    bot.run(token)

# ===========================================================================================================================================================

from flask import Flask

app = Flask(__name__)

@app.route("/")
def home():
    return "The bot is online."


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