app.py

import gradio as gr
import numpy as np
import json
from joblib import load
from tensorflow.keras.models import load_model
from sklearn.preprocessing import MinMaxScaler
import os

print(f"Gradio version: {gr.__version__}")
print(f"NumPy version: {np.__version__}")
print(f"Scikit-learn version: {sklearn.__version__}")
print(f"Joblib version: {joblib.__version__}")
print(f"TensorFlow version: {tf.__version__}")
print(f"Pandas version: {pd.__version__}")

# Directory paths for the saved models
script_dir = os.path.dirname(os.path.abspath(__file__))
scaler_path = os.path.join(script_dir, 'toolkit', 'scaler_X.json')
rf_model_path = os.path.join(script_dir, 'toolkit', 'rf_model.joblib')
mlp_model_path = os.path.join(script_dir, 'toolkit', 'mlp_model.keras')
meta_model_path = os.path.join(script_dir, 'toolkit', 'meta_model.joblib')

# Load the scaler and models
try:
    # Load the scaler
    with open(scaler_path, 'r') as f:
        scaler_params = json.load(f)
    scaler_X = MinMaxScaler()
    scaler_X.scale_ = np.array(scaler_params["scale_"])
    scaler_X.min_ = np.array(scaler_params["min_"])
    scaler_X.data_min_ = np.array(scaler_params["data_min_"])
    scaler_X.data_max_ = np.array(scaler_params["data_max_"])
    scaler_X.data_range_ = np.array(scaler_params["data_range_"])
    scaler_X.n_features_in_ = scaler_params["n_features_in_"]
    scaler_X.feature_names_in_ = np.array(scaler_params["feature_names_in_"])

    # Load the models
    loaded_rf_model = load(rf_model_path)
    print("Random Forest model loaded successfully.")
    loaded_mlp_model = load_model(mlp_model_path)
    print("MLP model loaded successfully.")
    loaded_meta_model = load(meta_model_path)
    print("Meta model loaded successfully.")
except Exception as e:
    print(f"Error loading models or scaler: {e}")

def predict_new_values(new_input_data):
    try:
        # Ensure the new input data is in the correct format
        print(f"Raw Input Data: {new_input_data}")
        new_input_data = np.array(new_input_data).reshape(1, -1)
        
        # Scale the new input data
        new_input_scaled = scaler_X.transform(new_input_data)
        print(f"Scaled Input Data: {new_input_scaled}")

        # Make predictions with both base models
        mlp_predictions_new = loaded_mlp_model.predict(new_input_scaled)
        rf_predictions_new = loaded_rf_model.predict(new_input_scaled)

        # Combine the predictions
        combined_features_new = np.concatenate([mlp_predictions_new, rf_predictions_new], axis=1)
        print(f"Combined Features: {combined_features_new}")

        # Use the loaded meta model to make predictions on the new data
        loaded_meta_predictions_new = loaded_meta_model.predict(combined_features_new)
        print(f"Meta Model Predictions: {loaded_meta_predictions_new}")

        return loaded_meta_predictions_new[0]
    except Exception as e:
        print(f"Error in prediction: {e}")
        return ["Error", "Error", "Error", "Error", "Error", "Error"]

def gradio_interface(velocity, temperature, precipitation, humidity):
    try:
        input_data = [velocity, temperature, precipitation, humidity]
        print(f"Input Data: {input_data}")
        predictions = predict_new_values(input_data)
        print(f"Predictions: {predictions}")
        return [
            f"{predictions[0] * 100:.2f}%" if predictions[0] != "Error" else "Error",
            f"{predictions[1] * 100:.2f}%" if predictions[1] != "Error" else "Error",
            f"{predictions[2] * 100:.2f}%" if predictions[2] != "Error" else "Error",
            f"{predictions[3] * 100:.2f}%" if predictions[3] != "Error" else "Error",
            f"{predictions[4] * 100:.2f}%" if predictions[4] != "Error" else "Error",
            f"{predictions[5] * 100:.2f}%" if predictions[5] != "Error" else "Error"
        ]
    except Exception as e:
        print(f"Error in Gradio interface: {e}")
        return ["Error", "Error", "Error", "Error", "Error", "Error"]

inputs = [
    gr.Slider(minimum=0, maximum=100, value=50, step=0.5, label="Velocity (mph)"),
    gr.Slider(minimum=-30, maximum=50, value=0, step=0.5, label="Temperature (°C)"),
    gr.Slider(minimum=0, maximum=10, value=0, step=0.01, label="Precipitation (inch)"),
    gr.Slider(minimum=0, maximum=100, value=50, label="Humidity (%)")
]

outputs = [
    gr.Textbox(label="Front Left"),
    gr.Textbox(label="Front Right"),
    gr.Textbox(label="Left"),
    gr.Textbox(label="Right"),
    gr.Textbox(label="Roof"),
    gr.Textbox(label="Rear")
]

gr.Interface(
    fn=gradio_interface, 
    inputs=inputs, 
    outputs=outputs, 
    title="Environmental Factor-Based Contamination Level Prediction",
    description="Enter the environmental factors to get the contamination levels for Front Left, Front Right, Left, Right, Roof, and Rear LiDARs."
).launch()