// Copyright (C) 2019-2020 Zilliz. 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 proxyservice

import (
	"sync"

	"github.com/zilliztech/milvus-distributed/internal/allocator"
	"github.com/zilliztech/milvus-distributed/internal/util/typeutil"
)

type UniqueID = typeutil.UniqueID
type Timestamp = typeutil.Timestamp

type nodeIDAllocator interface {
	AllocOne() UniqueID
}

type naiveNodeIDAllocator struct {
	allocator *allocator.IDAllocator
	now       UniqueID
	mtx       sync.Mutex
}

func (allocator *naiveNodeIDAllocator) AllocOne() UniqueID {
	allocator.mtx.Lock()
	defer func() {
		// allocator.now++
		allocator.mtx.Unlock()
	}()
	return allocator.now
}

func newNodeIDAllocator() *naiveNodeIDAllocator {
	return &naiveNodeIDAllocator{
		now: 1,
	}
}