import streamlit as st
from functions import *

st.set_page_config(page_title="Earnings Question/Answering", page_icon="🔎")
st.sidebar.header("Semantic Search")
st.markdown("## Earnings Semantic Search with LangChain, OpenAI & SBert")

def gen_sentiment(text):
    '''Generate sentiment of given text'''
    return sent_pipe(text)[0]['label']

def gen_annotated_text(df):
    '''Generate annotated text'''
    
    tag_list=[]
    for row in df.itertuples():
        label = row[2]
        text = row[1]
        if label == 'Positive':
            tag_list.append((text,label,'#8fce00'))
        elif label == 'Negative':
            tag_list.append((text,label,'#f44336'))
        else:
            tag_list.append((text,label,'#000000'))
        
    return tag_list

bi_enc_dict = {'mpnet-base-v2':"all-mpnet-base-v2",
              'instructor-base': 'hkunlp/instructor-base'}

search_input = st.text_input(
        label='Enter Your Search Query',value= "What key challenges did the business face?", key='search')
        
sbert_model_name = st.sidebar.selectbox("Embedding Model", options=list(bi_enc_dict.keys()), key='sbox')
        
chunk_size = st.sidebar.slider("Number of Chars per Chunk of Text",min_value=500,max_value=2000,value=1000)
overlap_size = st.sidebar.slider("Number of Overlap Chars in Search Response",min_value=50,max_value=300,value=50)

try:

    if search_input:
        
        if "sen_df" in st.session_state and "earnings_passages" in st.session_state:
        
            ## Save to a dataframe for ease of visualization
            sen_df = st.session_state['sen_df']

            title = st.session_state['title']

            embedding_model = bi_enc_dict[sbert_model_name]
                            
            with st.spinner(
                text=f"Loading {embedding_model} embedding model and Generating Response..."
            ):
                
                docsearch = process_corpus(st.session_state['earnings_passages'],title, embedding_model)

                result = embed_text(search_input,title,embedding_model,docsearch)


            references = [doc.page_content for doc in result['source_documents']]

            answer = result['result']

            sentiment_label = gen_sentiment(answer)
                
            ##### Sematic Search #####
            
            df = pd.DataFrame.from_dict({'Text':[answer],'Sentiment':[sentiment_label]})
              
            
            text_annotations = gen_annotated_text(df)[0]            
            
            with st.expander(label='Query Result', expanded=True):
                annotated_text(text_annotations)
                
            with st.expander(label='References from Corpus used to Generate Result'):
                for ref in references:
                    st.write(ref)
                
        else:
            
            st.write('Please ensure you have entered the YouTube URL or uploaded the Earnings Call file')
            
    else:
    
        st.write('Please ensure you have entered the YouTube URL or uploaded the Earnings Call file')  
        
except RuntimeError:
  
    st.write('Please ensure you have entered the YouTube URL or uploaded the Earnings Call file')