import gradio as gr
import numpy as np
import librosa
import time
from tensorflow.keras.models import load_model

# Load the emotion prediction model
def load_emotion_model(model_path):
    try:
        model = load_model(model_path)
        return model
    except Exception as e:
        print("Error loading emotion prediction model:", e)
        return None

model_path = 'mymodel_SER_LSTM_RAVDESS.h5'
model = load_emotion_model(model_path)

# Function to extract MFCC features from audio
def extract_mfcc(wav_file_name):
    try:
        y, sr = librosa.load(wav_file_name)
        mfccs = np.mean(librosa.feature.mfcc(y=y, sr=sr, n_mfcc=40).T, axis=0)
        return mfccs
    except Exception as e:
        print("Error extracting MFCC features:", e)
        return None

# Emotions dictionary
emotions = {1: 'neutral', 2: 'calm', 3: 'happy', 4: 'sad', 5: 'angry', 6: 'fearful', 7: 'disgust', 8: 'surprised'}

# Function to predict emotion from audio
def predict_emotion_from_audio(wav_filepath):
    try:
        test_point = extract_mfcc(wav_filepath)
        if test_point is not None:
            test_point = np.reshape(test_point, newshape=(1, 40, 1))
            predictions = model.predict(test_point)
            predicted_emotion_label = np.argmax(predictions[0]) + 1
            return emotions[predicted_emotion_label]
        else:
            return "Error: Unable to extract features"
    except Exception as e:
        print("Error predicting emotion:", e)
        return None

# Predict emotion from audio
def get_predictions(audio_input):
    emotion_prediction = predict_emotion_from_audio(audio_input)
    return emotion_prediction  # Return a single prediction instead of a list

# Create the Gradio interface
with gr.Blocks() as interface:
    gr.Markdown("Emotional Machines test: Load or Record an audio file to speech emotion analysis")
    with gr.Tabs():
        with gr.Tab("Acoustic and Semantic Predictions"):
            with gr.Row():
                input_audio = gr.Audio(label="Input Audio", type="filepath")
                submit_button = gr.Button("Submit")
            output_label = gr.Label("Prediction")  # Use a single Label instead of a list

    # Set the function to be called when the button is clicked
    submit_button.click(get_predictions, inputs=input_audio, outputs=output_label)

interface.launch()