import streamlit as st
import pickle
import pandas as pd
from catboost import CatBoostClassifier

# Load the trained model and unique values from the pickle file
with open('model_and_key_components.pkl', 'rb') as file:
    saved_components = pickle.load(file)

model = saved_components['model']
unique_values = saved_components['unique_values']

# Define the Streamlit app
def main():
    st.title("Employee Attrition Prediction App")
    st.sidebar.title("Model Settings")

    # Sidebar inputs
    with st.sidebar.expander("View Unique Values"):
        st.write("Unique values for each feature:")
        for column, values in unique_values.items():
            st.write(f"- {column}: {values}")

    # Main content
    st.write("Welcome to the Employee Attrition Prediction App!")
    st.write("This app helps HR practitioners predict employee attrition using a trained CatBoost model.")
    st.write("Please provide the following information to make a prediction:")

    # Define layout with two columns
    col1, col2 = st.columns(2)

    # Column 1
    with col1:
        age = st.slider("Age", min_value=18, max_value=70)
        monthly_income = st.slider("Monthly Income", min_value=1000, max_value=20000)
        num_companies_worked = st.slider("Number of Companies Worked", min_value=0, max_value=10)
        percent_salary_hike = st.slider("Percent Salary Hike", min_value=10, max_value=25)
        training_times_last_year = st.slider("Training Times Last Year", min_value=0, max_value=6)
        years_since_last_promotion = st.slider("Years Since Last Promotion", min_value=0, max_value=15)
        years_with_curr_manager = st.slider("Years With Current Manager", min_value=0, max_value=15)

    # Column 2
    with col2:
        over_time = st.checkbox("Over Time")
        work_life_balance = st.select_slider("Work Life Balance", options=[1, 2, 3, 4])
        environment_satisfaction = st.select_slider("Environment Satisfaction", options=[1, 2, 3, 4])
        job_satisfaction = st.select_slider("Job Satisfaction", options=[1, 2, 3, 4])
        relationship_satisfaction = st.select_slider("Relationship Satisfaction", options=[1, 2, 3, 4])

    # Create a DataFrame to hold the user input data
    input_data = pd.DataFrame({
        'Age': [age],
        'MonthlyIncome': [monthly_income],
        'NumCompaniesWorked': [num_companies_worked],
        'PercentSalaryHike': [percent_salary_hike],
        'TrainingTimesLastYear': [training_times_last_year],
        'YearsSinceLastPromotion': [years_since_last_promotion],
        'YearsWithCurrManager': [years_with_curr_manager],
        'OverTime': [over_time],
        'WorkLifeBalance': [work_life_balance],
        'EnvironmentSatisfaction': [environment_satisfaction],
        'JobSatisfaction': [job_satisfaction],
        'RelationshipSatisfaction': [relationship_satisfaction]
    })

    # Make predictions
    prediction = model.predict(input_data)
    probability = model.predict_proba(input_data)[:, 1]

    # Display prediction
    if prediction[0] == 0:
        st.success("Employee is predicted to stay (Attrition = No)")
    else:
        st.error("Employee is predicted to leave (Attrition = Yes)")

        # Offer recommendations for retaining the employee
        st.subheader("Suggestions for retaining the employee:")
        st.markdown("- Invest in orientation programs and career development for entry-level staff, which could contribute to higher retention.")
        st.markdown("- Implement mentorship programs and career development initiatives aimed at engaging and retaining younger employees.")
        st.markdown("- Offer robust training and development programs and regular promotions to foster career growth. This investment in skills and career advancement can contribute to higher job satisfaction and retention.")
        st.markdown("- Recognize the diverse needs of employees based on marital status and consider tailoring benefits or support programs accordingly.")
        st.markdown("- Consider offering benefits that cater to the unique needs of married, single, and divorced employees.")
        st.markdown("- Introduce or enhance policies that support work-life balance for employees with families.")
        st.markdown("- Recognize the unique challenges and opportunities within each department and tailor retention strategies accordingly.")

    # Display probability
    st.write(f"Probability of Attrition: {probability[0]*100:.2f}%")

if __name__ == "__main__":
    main()