import scipy.io
import os

def check_metadata():
    path = "data/raw/metadata.mat"
    if not os.path.exists(path):
        print(f"File not found: {path}")
        return
    
    try:
        data = scipy.io.loadmat(path)
        print("Keys in metadata.mat:", data.keys())
        
        # Check some fields
        for key in ['gaze_dir', 'person_identity', 'split', 'recordings']:
            if key in data:
                print(f"Field '{key}' shape: {data[key].shape}")
            else:
                print(f"Field '{key}' NOT found.")
                
        # List first 5 recordings if available
        if 'recordings' in data:
            recs = data['recordings']
            print("First 5 recordings:", recs[:5])
            
    except Exception as e:
        print(f"Error loading metadata: {e}")

if __name__ == "__main__":
    check_metadata()