#!/usr/bin/env python3
import argparse
import filecmp
import os

from mmengine.logging import MMLogger


def get_files(folder, extensions, ignore_folder=[]):
    """Get all file paths in the folder with specified extensions."""
    files = []
    for root, dirs, files_in_dir in os.walk(folder):
        for file in files_in_dir:
            if any(file.endswith(ext) for ext in extensions):
                files.append(os.path.relpath(os.path.join(root, file), folder))
    ignore_folders = []
    for folder in ignore_folder:
        ignore_folders.append(os.path.relpath(folder))
    # ignore the files starting with the folder in ignore_folder
    ignore_files = []
    for file in files:
        for folder in ignore_folders:
            if file.startswith(folder):
                ignore_files.append(file)
                # files.remove(file)
    keep_files = []
    for file in files:
        if file not in ignore_files:
            keep_files.append(file)

    return keep_files


def compare_folders(folder1, folder2, extensions, ignore_folder):
    """Compare files with specified extensions in two folders."""
    logger = MMLogger.get_current_instance()
    files1 = set(get_files(folder1, extensions, ignore_folder))
    files2 = set(get_files(folder2, extensions))

    # Check for files that are only in one folder
    only_in_folder1 = files1 - files2
    only_in_folder2 = files2 - files1
    common_files = files1 & files2

    if only_in_folder1:
        message = f'Only in {folder1}: {only_in_folder1}, '\
            'please copy files into {folder2}'
        raise ValueError(message)
    if only_in_folder2:
        print(f'Only in {folder2}: {only_in_folder2}')

    # Compare the content of common files
    for file in common_files:
        file1 = os.path.join(folder1, file)
        file2 = os.path.join(folder2, file)
        if not filecmp.cmp(file1, file2, shallow=False):
            logger.warning(f'Files differ: {file1} and {file2}')
            raise ValueError(f'Files differ: {file1} and {file2}')
        else:
            pass
            # logger.info(f"Files are the same: {file1} and {file2}")


def main():
    parser = argparse.ArgumentParser(
        description='Compare specified files in two folders')
    parser.add_argument('folder1', help='Path to the first folder')
    parser.add_argument('folder2', help='Path to the second folder')
    parser.add_argument(
        '--extensions',
        nargs='+',
        default=['.py', '.json', '.md', '.yml', '.txt'],
        help='File extensions to compare (default: .py .json .md .yml .txt)')
    parser.add_argument('--ignore',
                        nargs='+',
                        default=[],
                        help='Folder of ignored case')
    args = parser.parse_args()

    compare_folders(args.folder1, args.folder2, args.extensions, args.ignore)


if __name__ == '__main__':
    main()