/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.cloudstack.storage.datastore.manager;

import java.util.HashMap;
import java.util.Map;

import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreProvider;
import org.apache.cloudstack.engine.subsystem.api.storage.DataStoreProviderManager;
import org.apache.cloudstack.engine.subsystem.api.storage.HypervisorHostListener;
import org.apache.cloudstack.engine.subsystem.api.storage.PrimaryDataStoreDriver;
import org.apache.cloudstack.storage.datastore.PrimaryDataStoreImpl;
import org.apache.cloudstack.storage.datastore.PrimaryDataStore;
import org.apache.cloudstack.storage.datastore.PrimaryDataStoreProviderManager;
import org.apache.cloudstack.storage.datastore.db.PrimaryDataStoreDao;
import org.apache.cloudstack.storage.datastore.db.StoragePoolVO;
import org.springframework.stereotype.Component;

import com.cloud.storage.StorageManager;
import com.cloud.utils.exception.CloudRuntimeException;

@Component
public class PrimaryDataStoreProviderManagerImpl implements PrimaryDataStoreProviderManager {
    @Inject
    DataStoreProviderManager providerManager;
    @Inject
    PrimaryDataStoreDao dataStoreDao;
    Map<String, PrimaryDataStoreDriver> driverMaps;
    @Inject
    StorageManager storageMgr;

    @PostConstruct
    public void config() {
        driverMaps = new HashMap<String, PrimaryDataStoreDriver>();
    }

    @Override
    public PrimaryDataStore getPrimaryDataStore(long dataStoreId) {
        StoragePoolVO dataStoreVO = dataStoreDao.findById(dataStoreId);
        if (dataStoreVO == null) {
            throw new CloudRuntimeException("Unable to locate datastore with id " + dataStoreId);
        }
        String providerName = dataStoreVO.getStorageProviderName();
        DataStoreProvider provider = providerManager.getDataStoreProvider(providerName);
        PrimaryDataStoreImpl dataStore = PrimaryDataStoreImpl.createDataStore(dataStoreVO,
                driverMaps.get(provider.getName()), provider);
        return dataStore;
    }

    @Override
    public boolean registerDriver(String providerName, PrimaryDataStoreDriver driver) {
        if (driverMaps.get(providerName) != null) {
            return false;
        }
        driverMaps.put(providerName, driver);
        return true;
    }

    @Override
    public PrimaryDataStore getPrimaryDataStore(String uuid) {
        StoragePoolVO dataStoreVO = dataStoreDao.findByUuid(uuid);
        return getPrimaryDataStore(dataStoreVO.getId());
    }

    @Override
    public boolean registerHostListener(String providerName, HypervisorHostListener listener) {
        return storageMgr.registerHostListener(providerName, listener);
    }
}
