# Helpers shared by the axis and homing discovery tools
#
# Copyright (C) 2026  the Klipper contributors
#
# This file may be distributed under the terms of the GNU GPLv3 license.


def check_not_printing(printer):
    vsd = printer.lookup_object('virtual_sdcard', None)
    if vsd is not None and vsd.is_active():
        raise printer.command_error("Command not available during a print")


def lookup_cartesian_kinematics(printer, cmd_name):
    toolhead = printer.lookup_object('toolhead')
    kin = toolhead.get_kinematics()
    if kin.__class__.__name__ != 'CartKinematics':
        raise printer.command_error(
            "%s supports [cartesian] kinematics only" % (cmd_name,))
    rails = getattr(kin, 'rails', None)
    if rails is None or len(rails) != 3:
        raise printer.command_error(
            "%s is not supported with a dual carriage" % (cmd_name,))
    return kin


def discard_autosave(printer, touched):
    # Remove the entries set by a SAVE_CONFIG command that failed, so
    # that they do not affect any later SAVE_CONFIG command
    autosave = printer.lookup_object('configfile').autosave
    fileconfig = autosave.fileconfig
    sections = set([section for section, option in touched])
    for section, option in touched:
        if fileconfig.has_section(section):
            fileconfig.remove_option(section, option)
            if not fileconfig.options(section):
                fileconfig.remove_section(section)
    pending = dict(autosave.status_save_pending)
    for section in sections:
        if fileconfig.has_section(section):
            pending[section] = {
                opt: fileconfig.get(section, opt)
                for opt in fileconfig.options(section)}
        else:
            pending.pop(section, None)
    autosave.status_save_pending = pending
    autosave.save_config_pending = bool(pending)