// 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 cache

import (
	"context"
	"fmt"

	"yunion.io/x/sqlchemy"

	"yunion.io/x/onecloud/pkg/cloudcommon/db"
	"yunion.io/x/onecloud/pkg/mcclient"
	"yunion.io/x/onecloud/pkg/mcclient/auth"
)

type SUserCacheManager struct {
	db.SUserCacheManager
}

type SUser struct {
	db.SUser
}

func (user *SUser) GetModelManager() db.IModelManager {
	return UserCacheManager
}

var UserCacheManager *SUserCacheManager

func init() {
	dbUserCacheManager := db.SUserCacheManager{db.NewKeystoneCacheObjectManager(db.SUser{}, "users_cache_tbl", "user",
		"users")}
	UserCacheManager = &SUserCacheManager{
		dbUserCacheManager,
	}
	UserCacheManager.SetVirtualObject(&dbUserCacheManager)
}

func RegistUserCredCacheUpdater() {
	auth.RegisterAuthHook(onAuthCompleteUpdateCache)
}

func onAuthCompleteUpdateCache(userCred mcclient.TokenCredential) {
	UserCacheManager.updateUserCache(userCred)
}

func (ucm *SUserCacheManager) updateUserCache(userCred mcclient.TokenCredential) {
	ucm.Save(context.Background(), userCred.GetUserId(), userCred.GetUserName(),
		userCred.GetDomainId(), userCred.GetDomainName())
}

func (ucm *SUserCacheManager) FetchUsersByIDs(ctx context.Context, ids []string) (map[string]SUser, error) {
	q := ucm.Query().In("id", ids)
	users := make([]db.SUser, 0)
	err := db.FetchModelObjects(ucm, q, &users)
	if err != nil {
		return nil, err
	}
	ret := make(map[string]SUser)

	for i := range users {
		ret[users[i].Id] = SUser{users[i]}
	}

	// check that id is exist
	for _, id := range ids {
		if _, ok := ret[id]; ok {
			continue
		}
		user, err := ucm.FetchUserFromKeystone(ctx, id)
		if err != nil {
			continue
		}
		ret[id] = SUser{*user}
	}
	return ret, nil
}

func (ucm *SUserCacheManager) FetchUserByIDOrName(ctx context.Context, idStr string) (*SUser, error) {
	user, err := ucm.SUserCacheManager.FetchUserByIdOrName(ctx, idStr)
	if err != nil {
		return nil, err
	}
	return &SUser{*user}, nil
}

func (ucm *SUserCacheManager) FetchUserLikeName(ctx context.Context, name string, noExpireCheck bool) ([]SUser,
	error) {

	if !noExpireCheck {
		// todo
		return nil, fmt.Errorf("FetchUserLikeName with check Not Implement")
	}
	q := ucm.Query().Contains("name", name)
	return ucm.FetchUserFromLoaclCache(ctx, q)
}

func (ucm *SUserCacheManager) FetchUserFromLoaclCache(ctx context.Context, q *sqlchemy.SQuery) ([]SUser, error) {
	dbUsers := make([]db.SUser, 0, 1)
	err := db.FetchModelObjects(ucm, q, &dbUsers)
	if err != nil {
		return nil, err
	}
	users := make([]SUser, len(dbUsers))
	for i := range dbUsers {
		users[i] = SUser{dbUsers[i]}
	}
	return users, nil
}

func (u *SUser) Delete(ctx context.Context, userCred mcclient.TokenCredential) error {
	return u.SUser.Delete(ctx, userCred)
}