import sys

import __res


def repl():
    user_ns = {}
    py_main = __res.find('PY_MAIN')

    if py_main:
        mod_name, func_name = (py_main.split(b':', 1) + [None])[:2]
        try:
            import importlib
            mod = importlib.import_module(mod_name.decode('UTF-8'))
            user_ns = mod.__dict__
        except:
            import traceback
            traceback.print_exc()

        if func_name and '__main__' not in user_ns:
            def run(args):
                if isinstance(args, basestring):
                    import shlex
                    args = shlex.split(args)

                import sys
                sys.argv = [sys.argv[0]] + args
                getattr(mod, func_name)()

            user_ns['__main__'] = run

    try:
        import IPython
    except ModuleNotFoundError:
        pass
    else:
        return IPython.start_ipython(user_ns=user_ns)

    import code
    code.interact(local=user_ns)


def resource_files():
    sys.stdout.buffer.write(b'\n'.join(sorted(__res.resfs_files()) + [b'']))


def run_constructors():
    for key, module_name in __res.iter_keys(b'py/constructors/'):
        import importlib
        module = importlib.import_module(module_name.decode())
        init_func = getattr(module, __res.find(key).decode())
        init_func()
