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import chainlit as cl
import logging
import sys

_logger = logging.getLogger("lang-chat")

from langchain_core.prompts import ChatPromptTemplate
from langchain_core.vectorstores import VectorStore
from langchain_core.runnables.base import RunnableSequence

from globals import (
    DEFAULT_QUESTION1,
    DEFAULT_QUESTION2,
    gpt35_model,
    gpt4_model
)

from semantic import (
    SemanticRAGChainFactory
)

_semantic_rag_chain: RunnableSequence = None

@cl.on_message
async def main(message: cl.Message):
    
    content = ""
    try:
        response = _semantic_rag_chain.invoke({"question": message.content})
        content += response["response"].content
    except Exception as e:
        _logger.error(f"chat error: {e}: {vars(_semantic_rag_chain)}")

    # Send a response back to the user
    await cl.Message(
        content=f"{content}",
    ).send()

@cl.on_chat_start
async def start():

    global _semantic_rag_chain
    _semantic_rag_chain = SemanticRAGChainFactory.get_semantic_rag_chain()

    await cl.Avatar(
        name="Chatbot",
        url="https://cdn-icons-png.flaticon.com/512/8649/8649595.png"
    ).send()
    await cl.Avatar(
        name="User",
        url="https://media.architecturaldigest.com/photos/5f241de2c850b2a36b415024/master/w_1600%2Cc_limit/Luke-logo.png"
    ).send()
    
    cl.user_session.set("message_history", [{"role": "system", "content": "You are a helpful assistant. "}])
    await cl.Message(
        content="How can I help you with Meta's 2023 10K?"
    ).send()
    _logger.info(f"{20 * '*'}")


    # --------- For testing ---------
    # content = ""
    # if _semantic_rag_chain is not None:
    #     try:
    #         response1 = _semantic_rag_chain.invoke({"question": DEFAULT_QUESTION1})    
    #         response2 = _semantic_rag_chain.invoke({"question": DEFAULT_QUESTION2})    
    #         content = (
    #             f"**Question**: {DEFAULT_QUESTION1}\n\n"
    #             f"{response1['response'].content}\n\n"
    #             f"**Question**: {DEFAULT_QUESTION2}\n\n"
    #             f"{response2['response'].content}\n\n"
    #         )
    #     except Exception as e:
    #         _logger.error(f"init error: {e}")