app.py

import streamlit as st
import pandas as pd

st.set_page_config(layout="wide")
st.markdown("<h1 style='text-align: center;'>حسن xxx دحوم</h1>", unsafe_allow_html=True)

def header(text,h='h2'):
    return st.markdown(f"<{h} style='text-align: center;'>{text}</{h}>", unsafe_allow_html=True)
    
# First row with three text components
col1, col2, col3 = st.columns(3)
with col1:
    header('Premiums','h3')
with col2:
    header("Incurred Claims & Recoveries Data",'h3')
with col3:
    header("Claims Count",'h3')

# Second row with three file upload buttons
upload_col1, upload_col2, upload_col3 = st.columns(3)
with upload_col1:
    uploaded_file_premiums = st.file_uploader("", key="premiums")
with upload_col2:
    uploaded_file_claims_recoveries = st.file_uploader("", key="claims_recoveries")
with upload_col3:
    uploaded_file_claims_count = st.file_uploader("", key="claims_count")

# Third row with three buttons, enabled only if the corresponding file is uploaded
button_col1, button_col2, button_col3 = st.columns(3)
premiumlabel = "Select Premiums columns"
incurredlabel = "Select Incurred claims columns"
recoverlabel = "Select Recoveries columns"
claimscount = "Select Claims count columns"
with button_col1:
    if uploaded_file_premiums is not None:
        st.button(premiumlabel)
    else:
        st.button(premiumlabel, disabled=True)

def process_premiums_file(uploaded_file):
    # Read the CSV file into a DataFrame
    df = pd.read_csv(uploaded_file)
    
    # Store the DataFrame in the session state
    st.session_state['premiums_df'] = df

    # Indicate that the CSV has been processed and we're ready to select columns
    st.session_state['select_columns'] = True

# Button to select premiums, only enabled if a file has been uploaded
with button_col1:
    if uploaded_file_premiums is not None:
        if st.button(premiumlabel):
            process_premiums_file(uploaded_file_premiums)
    else:
        st.button(premiumlabel, disabled=True)

with button_col2:
    if uploaded_file_claims_recoveries is not None:
        st.button(incurredlabel)
        st.button(recoverlabel)
    else:
        st.button(incurredlabel, disabled=True)
        st.button(recoverlabel, disabled=True)

with button_col3:
    if uploaded_file_claims_count is not None:
        st.button(claimscount)
    else:
        st.button(claimscount, disabled=True)


# If the CSV has been processed, display the column selection UI
if st.session_state.get('select_columns', False):
    st.write("Please choose the 'lob' column and the values to filter by:")

    # Dropdown to select the 'lob' column
    lob_column = st.selectbox('Choose the column for "lob":', st.session_state['premiums_df'].columns)

    # Multiselect to choose values from the 'lob' column to filter the DataFrame
    selected_lob_values = st.multiselect('Choose values from the "lob" column:', 
                                         st.session_state['premiums_df'][lob_column].unique())

    # Filter the DataFrame based on selected 'lob' values
    if selected_lob_values:
        filtered_df = st.session_state['premiums_df'][st.session_state['premiums_df'][lob_column].isin(selected_lob_values)]
        st.session_state['filtered_premiums_df'] = filtered_df

        # Display other column selections after 'lob' has been selected and DataFrame has been filtered
        st.write("Now, select the columns for other parameters:")
        valuation_as_at = st.selectbox('Valuation As At:', filtered_df.columns)
        quarter_bracket = st.selectbox('Quarter Bracket:', filtered_df.columns)
        # Continue with other selections as required...

        # Store the column selections in the session state
        st.session_state['column_selections'] = {
            'valuation_as_at': valuation_as_at,
            'quarter_bracket': quarter_bracket,
            # ... include other selections as well
        }