app.py

import streamlit as st
from gcg.pipelines import predict
import os

# Define the directory to save uploaded files
TEMP_DIR = "temp"
os.makedirs(TEMP_DIR, exist_ok=True)  # Create the temp directory if it doesn't exist

st.title("Retinal Lesion Detector")
st.subheader("Upload retinal images and get predictions with heatmaps")

# File uploader to accept multiple images
uploaded_files = st.file_uploader(
    "Upload Retinal Images", 
    type=["jpg", "jpeg", "png"], 
    accept_multiple_files=True
)

if st.button("Run Inference"):
    if uploaded_files:
        img_paths = []
        for uploaded_file in uploaded_files:
            # Save each uploaded file to the temp directory
            file_path = os.path.join(TEMP_DIR, uploaded_file.name)
            with open(file_path, "wb") as f:
                f.write(uploaded_file.getbuffer())
            img_paths.append(file_path)  # Collect the file path for inference

        # Pass the file paths to the predict function
        st.info("Running predictions...")
        predictions = predict(img_paths)

        # Display predictions and heatmaps
        st.success("Inference completed! Here are the results:")
        for img_path, predicted_class in zip(img_paths, predictions):
            st.write(f"**Image**: {os.path.basename(img_path)}")
            st.write(f"**Predicted Class**: {predicted_class}")
            heatmap_path = os.path.join("heatmaps", f"heatmap_{os.path.basename(img_path)}")
            if os.path.exists(heatmap_path):
                st.image(heatmap_path, caption="Attention Map", use_container_width=True)
    else:
        st.error("Please upload at least one image.")