import os
import sys
import mimetypes
from shutil import copyfile
import argparse

from src import parser_factory

def __check_file(filename:str, mode:int = os.R_OK) -> bool:
    if not os.path.isfile(filename):
        print("[-] %s is not a regular file." % filename)
        return False
    elif not os.access(filename, mode):
        print("[-] %s is not readable and writeable." % filename)
        return False
    return True

def create_arg_parser():
    parser = argparse.ArgumentParser(description='Metadata anonymisation toolkit 2')
    parser.add_argument('files', nargs='*')

    info = parser.add_argument_group('Information')
    info.add_argument('-c', '--check', action='store_true',
                      help='check if a file is free of harmful metadatas')
    info.add_argument('-l', '--list', action='store_true',
                      help='list all supported fileformats')
    info.add_argument('-s', '--show', action='store_true',
                      help='list all the harmful metadata of a file without removing them')
    return parser

def show_meta(filename:str):
    if not __check_file(filename):
        return

    p, mtype = parser_factory.get_parser(filename)
    if p is None:
        print("[-] %s's format (%s) is not supported" % (filename, mtype))
        return
    print("[+] Metadata for %s:" % filename)
    for k,v in p.get_meta().items():
        print("  %s: %s" % (k, v))

def clean_meta(filename:str):
    if not __check_file(filename, os.R_OK|os.W_OK):
        return

    p, mtype = parser_factory.get_parser(f)
    if p is None:
        print("[-] %s's format (%s) is not supported" % (filename, mtype))
        return
    p.remove_all()

def main():
    args = create_arg_parser().parse_args()

    if args.show:
        for f in args.files:
            show_meta(f)
    else:
        for f in args.files:
            clean_meta(f)


if __name__ == '__main__':
    main()