import os
import sys
import glob

try:
    from opencc import OpenCC
except ImportError:
    print("Error: 'opencc' package not found. Installing...")
    import subprocess
    subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'opencc'])
    from opencc import OpenCC

def convert_filename(filename, cc):
    name, ext = os.path.splitext(filename)
    simplified_name = cc.convert(name)
    if simplified_name != name:
        return simplified_name + ext
    return None

def main():
    if len(sys.argv) < 2:
        print("Usage: python zhconv.py <path_to_file_or_folder>")
        return

    raw_input = sys.argv[1].strip(' "\'')
    input_arg = os.path.abspath(raw_input)
    print(f"Target: {input_arg}")

    cc = OpenCC('t2s')

    if os.path.isfile(input_arg):
        target_dir = os.path.dirname(input_arg)
        target_files = [os.path.basename(input_arg)]
    elif os.path.isdir(input_arg):
        target_dir = input_arg
        target_files = None
    else:
        print(f"Error: Path '{input_arg}' does not exist.")
        return

    os.chdir(target_dir)

    if target_files is None:
        target_files = glob.glob('*')

    converted_count = 0
    for filename in target_files:
        if not os.path.isfile(filename):
            continue
        new_filename = convert_filename(filename, cc)
        if new_filename:
            if os.path.exists(new_filename):
                print(f"Skipped (already exists): {new_filename}")
            else:
                os.rename(filename, new_filename)
                print(f"Converted: {filename} -> {new_filename}")
                converted_count += 1

    print(f"\nConverted {converted_count} file(s).")

if __name__ == "__main__":
    main()