###
# Copyright (c) 2023, John Burwell
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# modification, are permitted provided that the following conditions are met:
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#   * Redistributions of source code must retain the above copyright notice,
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###

import configparser
import json
import os
import requests

from supybot import utils, plugins, ircutils, callbacks, conf
from supybot.commands import *
try:
    from supybot.i18n import PluginInternationalization
    _ = PluginInternationalization('Chat')
except ImportError:
    # Placeholder that allows to run the plugin on a bot
    # without the i18n module
    _ = lambda x: x


class Chat(callbacks.Plugin):
    """Sends message to ChatGPT and replies with the response
    """

    def __init__(self, irc):
        self.__parent = super(Chat, self)
        self.__parent.__init__(irc)

        # Load the API key from the configuration file
        config_path = os.path.join(os.path.dirname(__file__), 'config.ini')
        self.config = configparser.ConfigParser()
        self.config.read(config_path)
        self.api_key = self.config.get('Chat', 'api_key')

    def conversation_history(self):
        history = irclib.IrcState.history[-30:]
        filtered_messages = [(msg.args[0], msg.args[1]) for msg in history if msg.command == 'PRIVMSG']
        return [{"role": "user", "content": f"{nick}: {msg}"} for nick, msg in history]
    
    def filter_prefix(self, msg, prefix):
        if msg.startswith(prefix):
            return msg[len(prefix):]
        else:
            return msg
    
    def chat(self, irc, msg, args, string):
        """
        Sends your comment to ChatGPT and returns the response.

        Args:
        string (str): The string to send to ChatGPT.

        Returns:
        str: ChatGPT's response
        """

        invocation_string = f"{conf.supybot.reply.whenAddressedBy.chars()}{self.name().lower()} "
        # self.log.info(f"invocation_string: {invocation_string}")

        model = self.registryValue("model")
        max_tokens = self.registryValue("max_tokens")

        # If the configured system prompt contains BOTNAME and IRCCHANNEL tokens, replace those with real values
        system_prompt = self.registryValue("system_prompt").replace("$bot_name", irc.nick).replace("$channel_name", msg.args[0])

        # Get the last few lines of the chat scrollback to include in the prompt
        history = irc.state.history[-self.registryValue("scrollback_lines"):]
        # for message in history: 
        #     self.log.info(f"{message.nick}: {json.dumps(message.args)}")

        # Restrict the scrollback to PRIVMSGs in the current channel, filtering out the invocation prefix
        filtered_messages = [
            (message.nick, (self.filter_prefix(message.args[1], f"{invocation_string}")))
            for message in history 
            if message.command == 'PRIVMSG' and message.args[0] == msg.args[0]
            ]

        # Format the conversation history for submission to the API
        conversation_history = [
            {
                "role": "assistant" if nick == irc.nick else "user", 
                "content": f"{nick}: {msg}"
                } 
            for nick, msg in filtered_messages
            ]

        # Combine the system prompt, and the scrollback (which already includes the invocation)
        messages = [{"role": "system", "content": system_prompt}] + conversation_history
        # self.log.info(json.dumps(messages))

        # Submit the request to the API
        # res = requests.post(f"http://localhost:8000/capture", headers = {
        res = requests.post(f"https://api.openai.com/v1/chat/completions", headers = {
                "Content-Type":"application/json",
                "Authorization":f"Bearer {self.registryValue('api_key')}"
                },
                json={
                    "model": model,
                    "messages": messages,
                    "max_tokens": max_tokens,
                    }).json()

        # Pick a response
        response = res['choices'][0]['message']['content'].strip()

        # Combine multiple lines
        line = response.replace("\n", self.registryValue("join_string"))

        # Post the reply to the channel
        irc.reply( line )

        # for line in conversation_history:
        #     irc.reply( line )

    chat = wrap(chat, ['text'])

Class = Chat