// -*- Mode: Go; indent-tabs-mode: t -*-

/*
 * Copyright (C) 2018-2024 Canonical Ltd
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package features

import (
	"github.com/snapcore/snapd/testutil"
)

// NumberOfFeature returns the number of known features.
func NumberOfFeatures() int {
	return int(lastFeature)
}

var FeaturesSupportedCallbacks = featuresSupportedCallbacks

func MockReleaseSystemctlSupportsUserUnits(f func() bool) (restore func()) {
	r := testutil.Backup(&releaseSystemctlSupportsUserUnits)
	releaseSystemctlSupportsUserUnits = f
	return r
}

func MockKnownFeaturesImpl(f func() []SnapdFeature) (restore func()) {
	return testutil.Mock(&knownFeaturesImpl, f)
}

func MockFeatureNames(mockedFeatures map[SnapdFeature]string) (restore func()) {
	r := testutil.Backup(&featureNames)
	featureNames = mockedFeatures
	return r
}

func MockFeaturesSupportedCallbacks(f map[SnapdFeature]func() (bool, string)) (restore func()) {
	r := testutil.Backup(&featuresSupportedCallbacks)
	featuresSupportedCallbacks = f
	return r
}
