import streamlit as st
import logging
from BanglaRAG.bangla_rag_pipeline import BanglaRAGChain
import warnings

warnings.filterwarnings("ignore")

# Default constants for the script
DEFAULT_CHAT_MODEL_ID = "hassanaliemon/bn_rag_llama3-8b"
DEFAULT_EMBED_MODEL_ID = "l3cube-pune/bengali-sentence-similarity-sbert"
DEFAULT_K = 4
DEFAULT_TOP_K = 2
DEFAULT_TOP_P = 0.6
DEFAULT_TEMPERATURE = 0.6
DEFAULT_CHUNK_SIZE = 500
DEFAULT_CHUNK_OVERLAP = 150
DEFAULT_MAX_NEW_TOKENS = 256

# Set up logging
logging.basicConfig(
    level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s"
)

# Initialize and load the RAG model
@st.cache_resource(show_spinner=False)
def load_model(chat_model_id, embed_model_id, text_path, k, top_k, top_p, temperature, chunk_size, chunk_overlap, hf_token, max_new_tokens, quantization):
    rag_chain = BanglaRAGChain()
    rag_chain.load(
        chat_model_id=chat_model_id,
        embed_model_id=embed_model_id,
        text_path=text_path,
        k=k,
        top_k=top_k,
        top_p=top_p,
        temperature=temperature,
        chunk_size=chunk_size,
        chunk_overlap=chunk_overlap,
        hf_token=hf_token,
        max_new_tokens=max_new_tokens,
        quantization=quantization,
    )
    return rag_chain

def main():
    st.title("Bangla RAG Chatbot")
    
    # Sidebar for model configuration
    st.sidebar.header("Model Configuration")
    
    chat_model_id = st.sidebar.text_input("Chat Model ID", DEFAULT_CHAT_MODEL_ID)
    embed_model_id = st.sidebar.text_input("Embed Model ID", DEFAULT_EMBED_MODEL_ID)
    k = st.sidebar.slider("Number of Documents to Retrieve (k)", 1, 10, DEFAULT_K)
    top_k = st.sidebar.slider("Top K", 1, 10, DEFAULT_TOP_K)
    top_p = st.sidebar.slider("Top P", 0.0, 1.0, DEFAULT_TOP_P)
    temperature = st.sidebar.slider("Temperature", 0.0, 1.0, DEFAULT_TEMPERATURE)
    max_new_tokens = st.sidebar.slider("Max New Tokens", 1, 512, DEFAULT_MAX_NEW_TOKENS)
    chunk_size = st.sidebar.slider("Chunk Size", 100, 1000, DEFAULT_CHUNK_SIZE)
    chunk_overlap = st.sidebar.slider("Chunk Overlap", 0, 500, DEFAULT_CHUNK_OVERLAP)
    text_path = st.sidebar.text_input("Text File Path", "text.txt")
    quantization = st.sidebar.checkbox("Enable Quantization (4-bit)", value=False)
    show_context = st.sidebar.checkbox("Show Retrieved Context", value=False)

    hf_token = st.text_input("Hugging Face API Token", type="password")
    
    # Load the model with the above configuration
    rag_chain = load_model(
        chat_model_id=chat_model_id,
        embed_model_id=embed_model_id,
        text_path=text_path,
        k=k,
        top_k=top_k,
        top_p=top_p,
        temperature=temperature,
        chunk_size=chunk_size,
        chunk_overlap=chunk_overlap,
        hf_token=hf_token,
        max_new_tokens=max_new_tokens,
        quantization=quantization,
    )
    
    st.write("### Enter your question:")
    query = st.text_input("আপনার প্রশ্ন")

    if st.button("Generate Answer"):
        if query:
            try:
                answer, context = rag_chain(query)
                st.write(f"**Answer:** {answer}")
                if show_context:
                    st.write(f"**Context:** {context}")
            except Exception as e:
                st.error(f"Couldn't generate an answer: {e}")
        else:
            st.warning("Please enter a query.")
        
if __name__ == "__main__":
    main()