import streamlit as st
import pickle
import pandas as pd
from extract_features import ExtractFeatures

@st.cache_resource
def get_model():
    """
    Loads the phishing URL detection model from a pickle file.

    This function reads and loads a pickled file containing the classifier.

    Returns:
        object: The loaded phishing URL detection model.

    Note:
        The model should be saved in a file named 'phishing_url_detector.pkl'.
        XGBoost module must be installed before using the file.
    """
    with open('phishing_url_detector.pkl', 'rb') as pickle_model:
        phishing_url_detector = pickle.load(pickle_model)
    return phishing_url_detector

    # THEME AND COLORS:
    theme_config = st.config.get_option("theme")
    
    # Define the theme colors for positive and negative results
    positive_color = "#00FF00"  # Green
    negative_color = "#FF0000"  # Red
    
    # Set the initial theme colors
    theme_config["theme.success"] = {"backgroundColor": positive_color}
    theme_config["theme.error"] = {"backgroundColor": negative_color}
    st.config.set_option("theme", theme_config)

st.title("Phishing Website Detector")
st.header("Are you sure your 'bank' sent that link?")

# Takes in user input
input_url = st.text_area("Put in your sus site link here: ")

if input_url != "":
    
    # Extracts features from the URL and converts it into a dataframe
    features_url = ExtractFeatures().url_to_features(url=input_url)
    features_dataframe = pd.DataFrame.from_dict([features_url])
    features_dataframe = features_dataframe.fillna(-1)
    features_dataframe = features_dataframe.astype(int)

    st.write("Okay!")
    st.cache_data.clear()
    prediction_str = ""

    # Predict outcome using extracted features
    try: 
        phishing_url_detector = get_model()
        prediction = phishing_url_detector.predict(features_dataframe)
        if prediction == int(True):
            prediction_str = 'Phishing Website. Do not click!'
            theme_config["theme.error"]["backgroundColor"] = negative_color
        elif prediction == int(False):
            prediction_str = 'Not Phishing Website, stay safe!'
            theme_config["theme.success"]["backgroundColor"] = positive_color
        else:
            prediction_str = ''
        st.write(prediction_str)
        st.write(features_dataframe)

    except Exception as e:
        print(e)
        st.error("Not sure, what went wrong. We'll get back to you shortly!")

else:
    st.write("")