import os


def get_pictures_info(directory, page, page_size):
    pictures = []
    start_index = (page - 1) * page_size
    end_index = start_index + page_size
    counter = 0

    for filename in os.listdir(directory):
        if filename.lower().endswith(('.png', '.jpg', '.jpeg', '.gif', '.bmp')):
            if start_index <= counter < end_index:
                file_path = os.path.join(directory, filename)
                size = os.path.getsize(file_path)
                size_mb = size / (1024 * 1024)
                picture_info = {
                    "id": counter + 1,
                    "photo_name": filename,
                    "photo_size": round(size_mb, 2),
                    "photo_url": file_path
                }
                pictures.append(picture_info)
            counter += 1
            if counter >= end_index:
                break
    return pictures


def get_total_pages(directory, page_size):
    total_photos = 0
    for filename in os.listdir(directory):
        if filename.lower().endswith(('.png', '.jpg', '.jpeg', '.gif', '.bmp')):
            total_photos += 1
    return (total_photos + page_size - 1) // page_size