import sys  # noqa: I001
import contextlib
import pathlib


# From https://github.com/python/cpython/blob/v3.7.0b5/Lib/site.py#L436
# Changing the history file
def register_readline() -> None:
    import atexit

    try:
        import readline
        import rlcompleter  # noqa: F401
    except ImportError:
        return

    # Reading the initialization (config) file may not be enough to set a
    # completion key, so we set one first and then read the file.
    readline_doc = getattr(readline, "__doc__", "")
    if readline_doc is not None and "libedit" in readline_doc:
        readline.parse_and_bind("bind ^I rl_complete")
    else:
        readline.parse_and_bind("tab: complete")

    # An OSError here could have many causes, but the most likely one
    # is that there's no .inputrc file (or .editrc file in the case of
    # Mac OS X + libedit) in the expected location.  In that case, we
    # want to ignore the exception.
    cm = contextlib.suppress(OSError)
    with cm:
        readline.read_init_file()

    if readline.get_current_history_length() == 0:
        # If no history was loaded, default to .python_history.
        # The guard is necessary to avoid doubling history size at
        # each interpreter exit when readline was already configured
        # through a PYTHONSTARTUP hook, see:
        # http://bugs.python.org/issue5845#msg198636
        history = pathlib.Path("~/.cache/python_history").expanduser()
        cm = contextlib.suppress(OSError)
        with cm:
            readline.read_history_file(history)
        atexit.register(readline.write_history_file, history)


sys.__interactivehook__ = register_readline  # noqa: attr-defined