import os
import pathlib
import shutil
import configparser


def load_path_config():
    conf = configparser.ConfigParser()
    root_dir = pathlib.Path(__file__).parent.absolute()
    conf_dir = root_dir / "config.ini"
    conf.read(conf_dir)
    paths = conf['Paths']
    return paths


def replicate_directory_structure(source_path:str, target_path:str, file_extensions, max_depth=None):
    for root, dirs, files in os.walk(source_path):
        # Get the relative path of the current directory
        relative_path = os.path.relpath(root, source_path)
        target_dir = os.path.join(target_path, relative_path)

        # Calculate the depth of the current directory
        current_depth = relative_path.count(os.sep)
        
        # Create the corresponding directory in the target path
        corr_path = target_dir.split('[')[0]
        os.makedirs(corr_path, exist_ok=True)

        # Copy files with the specified extensions to the target directory
        for file in files:
            if any(file.endswith(ext) for ext in file_extensions):
                source_file = os.path.join(root, file)
                target_file = os.path.join(corr_path, file)
                shutil.copy2(source_file, target_file)

        # Check if the maximum depth has been reached
        if max_depth is not None and current_depth >= max_depth:
            del dirs[:]  # Do not traverse deeper into subdirectories


if __name__ == "__main__":
    
    config_file = 'config.ini'

    # Read settings from the config file
    config = configparser.ConfigParser()
    config.read(config_file)
    source_directory = config.get('Settings', 'source_root_dir')
    target_directory = config.get('Settings', 'target_root_dir')
    max_depth = config.getint('Settings', 'max_depth')

    # Read file extensions from the config file
    file_extensions = [ext.strip() for ext in config.get('FileExtensions', 'extensions').split(',')]

    print('Scan Roms...')
    replicate_directory_structure(source_directory, target_directory, file_extensions, max_depth)
    print(f'Scan Completed. Prepped Folder Structure saved at {target_directory}')