from pathlib import Path
from scandir import scandir

image_extensions = [".jpg", ".jpeg", ".png", ".tif", ".tiff"]

def get_image_paths(dir_path):
    dir_path = Path (dir_path)
        
    result = []    
    if dir_path.exists():
        for x in list(scandir(str(dir_path))):
            if any([x.name.lower().endswith(ext) for ext in image_extensions]):
                result.append(x.path)
    return result

def get_image_unique_filestem_paths(dir_path, verbose_print_func=None):
    result = get_image_paths(dir_path)   
    result_dup = set()    
    
    for f in result[:]:
        f_stem = Path(f).stem
        if f_stem in result_dup:            
            result.remove(f)
            if verbose_print_func is not None:
                verbose_print_func ("Duplicate filenames are not allowed, skipping: %s" % Path(f).name )            
            continue            
        result_dup.add(f_stem)
            
    return result
    
def get_all_dir_names_startswith (dir_path, startswith):
    dir_path = Path (dir_path)
    startswith = startswith.lower()
        
    result = []    
    if dir_path.exists():
        for x in list(scandir(str(dir_path))):
            if x.name.lower().startswith(startswith):
                result.append ( x.name[len(startswith):] )
    return result