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// 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 com.cloud.storage.dao;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.apache.commons.collections.CollectionUtils;
import org.springframework.stereotype.Component;

import com.cloud.storage.GuestOSHypervisorVO;
import com.cloud.utils.db.Filter;
import com.cloud.utils.db.QueryBuilder;
import com.cloud.utils.db.GenericDaoBase;
import com.cloud.utils.db.SearchBuilder;
import com.cloud.utils.db.SearchCriteria;

@Component
public class GuestOSHypervisorDaoImpl extends GenericDaoBase<GuestOSHypervisorVO, Long> implements GuestOSHypervisorDao {

    protected final SearchBuilder<GuestOSHypervisorVO> guestOsSearch;
    protected final SearchBuilder<GuestOSHypervisorVO> mappingSearch;
    protected final SearchBuilder<GuestOSHypervisorVO> userDefinedMappingSearch;
    protected final SearchBuilder<GuestOSHypervisorVO> guestOsNameSearch;
    protected final SearchBuilder<GuestOSHypervisorVO> availableHypervisorVersionSearch;
    protected final SearchBuilder<GuestOSHypervisorVO> hypervisorTypeAndVersionSearch;

    public GuestOSHypervisorDaoImpl() {
        guestOsSearch = createSearchBuilder();
        guestOsSearch.and("guest_os_id", guestOsSearch.entity().getGuestOsId(), SearchCriteria.Op.EQ);
        guestOsSearch.done();

        mappingSearch = createSearchBuilder();
        mappingSearch.and("guest_os_id", mappingSearch.entity().getGuestOsId(), SearchCriteria.Op.EQ);
        mappingSearch.and("hypervisor_type", mappingSearch.entity().getHypervisorType(), SearchCriteria.Op.EQ);
        mappingSearch.and("hypervisor_version", mappingSearch.entity().getHypervisorVersion(), SearchCriteria.Op.EQ);
        mappingSearch.done();

        userDefinedMappingSearch = createSearchBuilder();
        userDefinedMappingSearch.and("guest_os_id", userDefinedMappingSearch.entity().getGuestOsId(), SearchCriteria.Op.EQ);
        userDefinedMappingSearch.and("hypervisor_type", userDefinedMappingSearch.entity().getHypervisorType(), SearchCriteria.Op.EQ);
        userDefinedMappingSearch.and("hypervisor_version", userDefinedMappingSearch.entity().getHypervisorVersion(), SearchCriteria.Op.EQ);
        userDefinedMappingSearch.and("is_user_defined", userDefinedMappingSearch.entity().getIsUserDefined(), SearchCriteria.Op.EQ);
        userDefinedMappingSearch.done();

        guestOsNameSearch = createSearchBuilder();
        guestOsNameSearch.and("guest_os_name", guestOsNameSearch.entity().getGuestOsName(), SearchCriteria.Op.EQ);
        guestOsNameSearch.and("hypervisor_type", guestOsNameSearch.entity().getHypervisorType(), SearchCriteria.Op.EQ);
        guestOsNameSearch.and("hypervisor_version", guestOsNameSearch.entity().getHypervisorVersion(), SearchCriteria.Op.EQ);
        guestOsNameSearch.and("is_user_defined", guestOsNameSearch.entity().getIsUserDefined(), SearchCriteria.Op.EQ);
        guestOsNameSearch.done();

        availableHypervisorVersionSearch = createSearchBuilder();
        availableHypervisorVersionSearch.and("hypervisor_type",
                availableHypervisorVersionSearch.entity().getHypervisorType(), SearchCriteria.Op.EQ);
        availableHypervisorVersionSearch.and("hypervisor_version",
                availableHypervisorVersionSearch.entity().getHypervisorVersion(), SearchCriteria.Op.GTEQ);
        availableHypervisorVersionSearch.select(null, SearchCriteria.Func.DISTINCT,
                availableHypervisorVersionSearch.entity().getHypervisorVersion());
        availableHypervisorVersionSearch.done();

        hypervisorTypeAndVersionSearch = createSearchBuilder();
        hypervisorTypeAndVersionSearch.and("hypervisor_type", hypervisorTypeAndVersionSearch.entity().getHypervisorType(), SearchCriteria.Op.EQ);
        hypervisorTypeAndVersionSearch.and("hypervisor_version", hypervisorTypeAndVersionSearch.entity().getHypervisorVersion(), SearchCriteria.Op.EQ);
        hypervisorTypeAndVersionSearch.done();
    }

    @Override
    public List<GuestOSHypervisorVO> listByGuestOsId(long guestOsId) {
        SearchCriteria<GuestOSHypervisorVO> sc = guestOsSearch.create();
        sc.setParameters("guest_os_id", guestOsId);
        return listBy(sc);
    }

    @Override
    public GuestOSHypervisorVO findByOsIdAndHypervisor(long guestOsId, String hypervisorType, String hypervisorVersion) {
        SearchCriteria<GuestOSHypervisorVO> sc = mappingSearch.create();
        String version = "default";
        if (!(hypervisorVersion == null || hypervisorVersion.isEmpty())) {
            version = hypervisorVersion;
        }
        sc.setParameters("guest_os_id", guestOsId);
        sc.setParameters("hypervisor_type", hypervisorType);
        sc.setParameters("hypervisor_version", version);
        return findOneBy(sc);
    }

    @Override
    public GuestOSHypervisorVO findByOsIdAndHypervisorAndUserDefined(long guestOsId, String hypervisorType, String hypervisorVersion, boolean isUserDefined) {
        SearchCriteria<GuestOSHypervisorVO> sc = userDefinedMappingSearch.create();
        String version = "default";
        if (!(hypervisorVersion == null || hypervisorVersion.isEmpty())) {
            version = hypervisorVersion;
        }
        sc.setParameters("guest_os_id", guestOsId);
        sc.setParameters("hypervisor_type", hypervisorType);
        sc.setParameters("hypervisor_version", version);
        sc.setParameters("is_user_defined", isUserDefined);
        return findOneBy(sc);
    }

    @Override
    public boolean removeGuestOsMapping(Long id) {
        GuestOSHypervisorVO guestOsHypervisor = findById(id);
        createForUpdate(id);
        guestOsHypervisor.setRemoved(new Date());
        update(id, guestOsHypervisor);
        return super.remove(id);
    }

    @Override
    public GuestOSHypervisorVO findByOsNameAndHypervisor(String guestOsName, String hypervisorType, String hypervisorVersion) {
        SearchCriteria<GuestOSHypervisorVO> sc = guestOsNameSearch.create();
        String version = "default";
        if (!(hypervisorVersion == null || hypervisorVersion.isEmpty())) {
            version = hypervisorVersion;
        }
        sc.setParameters("guest_os_name", guestOsName);
        sc.setParameters("hypervisor_type", hypervisorType);
        sc.setParameters("hypervisor_version", version);
        final Filter filter = new Filter(GuestOSHypervisorVO.class, "guestOsId", true, null, null);
        List<GuestOSHypervisorVO> results = listIncludingRemovedBy(sc, filter);
        return CollectionUtils.isNotEmpty(results) ? results.get(0) : null;
    }

    @Override
    public GuestOSHypervisorVO findByOsNameAndHypervisorOrderByCreatedDesc(String guestOsName, String hypervisorType, String hypervisorVersion) {
        SearchCriteria<GuestOSHypervisorVO> sc = guestOsNameSearch.create();
        sc.setParameters("guest_os_name", guestOsName);
        sc.setParameters("hypervisor_type", hypervisorType);
        sc.setParameters("hypervisor_version", hypervisorVersion);
        sc.setParameters("is_user_defined", false);

        Filter orderByFilter = new Filter(GuestOSHypervisorVO.class, "created", false, null, 1L);
        List<GuestOSHypervisorVO> GuestOSHypervisorVOs = listBy(sc, orderByFilter);
        if (CollectionUtils.isNotEmpty(GuestOSHypervisorVOs)) {
            return GuestOSHypervisorVOs.get(0);
        }
        return null;
    }

    @Override
    public List<GuestOSHypervisorVO> listByOsNameAndHypervisorMinimumVersion(String guestOsName, String hypervisorType,
                                                                             String minHypervisorVersion) {
        final QueryBuilder<GuestOSHypervisorVO> sc = QueryBuilder.create(GuestOSHypervisorVO.class);
        sc.and(sc.entity().getGuestOsName(), SearchCriteria.Op.EQ, guestOsName);
        sc.and(sc.entity().getHypervisorType(), SearchCriteria.Op.EQ, hypervisorType);
        sc.and().op(sc.entity().getHypervisorVersion(), SearchCriteria.Op.GTEQ, minHypervisorVersion);
        sc.or(sc.entity().getHypervisorVersion(), SearchCriteria.Op.NEQ, "default");
        sc.cp();
        return sc.list();
    }

    @Override
    public List<String> listHypervisorSupportedVersionsFromMinimumVersion(String hypervisorType, String hypervisorVersion) {
        List<String> versions = new ArrayList<>();
        SearchCriteria<GuestOSHypervisorVO> sc = availableHypervisorVersionSearch.create();
        sc.setParameters("hypervisor_type", hypervisorType);
        sc.setParameters("hypervisor_version", hypervisorVersion);
        Filter filter = new Filter(GuestOSHypervisorVO.class, "hypervisorVersion", true, null, null);
        List<GuestOSHypervisorVO> mappings = listBy(sc, filter);
        for (GuestOSHypervisorVO mapping : mappings) {
            versions.add(mapping.getHypervisorVersion());
        }
        return versions;
    }

    @Override
    public List<GuestOSHypervisorVO> listByHypervisorTypeAndVersion(String hypervisorType, String hypervisorVersion) {
        SearchCriteria<GuestOSHypervisorVO> sc = hypervisorTypeAndVersionSearch.create();
        sc.setParameters("hypervisor_type", hypervisorType);
        sc.setParameters("hypervisor_version", hypervisorVersion);
        return listIncludingRemovedBy(sc);
    }
}
