// Copyright 2019 Yunion
//
// 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 apihelper

import (
	"yunion.io/x/onecloud/pkg/cloudcommon/db"
	mcclient "yunion.io/x/onecloud/pkg/mcclient"
	mcclient_modulebase "yunion.io/x/onecloud/pkg/mcclient/modulebase"
)

type ModelSetsUpdateResult struct {
	Correct bool
	Changed bool
}

type IModelSets interface {
	NewEmpty() IModelSets
	ModelSetList() []IModelSet
	ApplyUpdates(IModelSets) ModelSetsUpdateResult
	Copy() IModelSets
}

type IModelSet interface {
	ModelManager() mcclient_modulebase.IBaseManager
	NewModel() db.IModel
	AddModel(db.IModel)
	Copy() IModelSet
}

func SyncModelSets(mssOld IModelSets, s *mcclient.ClientSession, batchSize int) (r ModelSetsUpdateResult, err error) {
	mss := mssOld.ModelSetList()
	mssNews := mssOld.NewEmpty()
	for i, msNew := range mssNews.ModelSetList() {
		minUpdatedAt := ModelSetMaxUpdatedAt(mss[i])
		err = GetModels(&GetModelsOptions{
			ClientSession: s,
			ModelManager:  msNew.ModelManager(),
			MinUpdatedAt:  minUpdatedAt,
			ModelSet:      msNew,
			BatchListSize: batchSize,
		})
		if err != nil {
			return
		}
	}
	r = mssOld.ApplyUpdates(mssNews)
	return r, nil
}