// Copyright (c) 2022 Tigera, Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package v2

import (
	"encoding/binary"

	"golang.org/x/sys/unix"

	"github.com/projectcalico/calico/felix/bpf/maps"
	v3 "github.com/projectcalico/calico/felix/bpf/mock/multiversion/v3"
)

var MockMapParams = maps.MapParameters{
	Type:         "hash",
	KeySize:      16,
	ValueSize:    64,
	MaxEntries:   1024,
	Name:         "cali_mock",
	Flags:        unix.BPF_F_NO_PREALLOC,
	Version:      2,
	UpdatedByBPF: true,
}

const (
	KeySize   = 16
	ValueSize = 64
)

type Key [KeySize]byte

func (k Key) AsBytes() []byte {
	return k[:]
}

func NewKey(k uint32) Key {
	var key Key
	binary.LittleEndian.PutUint32(key[:], k)
	return key
}

type Value [ValueSize]byte

func NewValue(v uint32) Value {
	var val Value
	binary.LittleEndian.PutUint32(val[:], v)
	return val
}

func (v Value) AsBytes() []byte {
	return v[:]
}

func (k Key) Upgrade() maps.Upgradable {
	var key3 v3.Key
	copy(key3[:], k[:])
	return key3
}

func (v Value) Upgrade() maps.Upgradable {
	var val3 v3.Value
	copy(val3[:], v[:])
	return val3
}