/*
 * 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 de.tudarmstadt.hrz.idm.oss.custom.persistance.jpa;

import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.apache.commons.lang3.StringUtils;
import org.apache.syncope.common.lib.SyncopeClientCompositeException;
import org.apache.syncope.common.lib.SyncopeClientException;
import org.apache.syncope.common.lib.request.GroupUR;
import org.apache.syncope.common.lib.to.ConnObject;
import org.apache.syncope.common.lib.to.TypeExtensionTO;
import org.apache.syncope.common.lib.types.AnyTypeKind;
import org.apache.syncope.common.lib.types.ResourceOperation;
import org.apache.syncope.core.persistence.api.attrvalue.validation.PlainAttrValidationManager;
import org.apache.syncope.core.persistence.api.dao.AnyObjectDAO;
import org.apache.syncope.core.persistence.api.dao.AnyTypeClassDAO;
import org.apache.syncope.core.persistence.api.dao.AnyTypeDAO;
import org.apache.syncope.core.persistence.api.dao.ExternalResourceDAO;
import org.apache.syncope.core.persistence.api.dao.GroupDAO;
import org.apache.syncope.core.persistence.api.dao.PlainAttrDAO;
import org.apache.syncope.core.persistence.api.dao.PlainAttrValueDAO;
import org.apache.syncope.core.persistence.api.dao.PlainSchemaDAO;
import org.apache.syncope.core.persistence.api.dao.RealmDAO;
import org.apache.syncope.core.persistence.api.dao.RelationshipTypeDAO;
import org.apache.syncope.core.persistence.api.dao.UserDAO;
import org.apache.syncope.core.persistence.api.entity.AnyType;
import org.apache.syncope.core.persistence.api.entity.AnyTypeClass;
import org.apache.syncope.core.persistence.api.entity.AnyUtilsFactory;
import org.apache.syncope.core.persistence.api.entity.EntityFactory;
import org.apache.syncope.core.persistence.api.entity.anyobject.ADynGroupMembership;
import org.apache.syncope.core.persistence.api.entity.group.Group;
import org.apache.syncope.core.persistence.api.entity.group.TypeExtension;
import org.apache.syncope.core.persistence.api.entity.user.User;
import org.apache.syncope.core.persistence.api.search.SearchCondVisitor;
import org.apache.syncope.core.provisioning.api.DerAttrHandler;
import org.apache.syncope.core.provisioning.api.IntAttrNameParser;
import org.apache.syncope.core.provisioning.api.MappingManager;
import org.apache.syncope.core.provisioning.api.PropagationByResource;
import org.apache.syncope.core.provisioning.api.VirAttrHandler;
import org.apache.syncope.core.provisioning.java.data.GroupDataBinderImpl;
import org.apache.syncope.core.provisioning.java.pushpull.OutboundMatcher;
import org.springframework.transaction.annotation.Transactional;

@Transactional(rollbackFor = { Throwable.class })
public class CustomGroupDataBinder extends GroupDataBinderImpl {

    public CustomGroupDataBinder(
            final AnyTypeDAO anyTypeDAO,
            final RealmDAO realmDAO,
            final AnyTypeClassDAO anyTypeClassDAO,
            final AnyObjectDAO anyObjectDAO,
            final UserDAO userDAO,
            final GroupDAO groupDAO,
            final PlainSchemaDAO plainSchemaDAO,
            final PlainAttrDAO plainAttrDAO,
            final PlainAttrValueDAO plainAttrValueDAO,
            final ExternalResourceDAO resourceDAO,
            final RelationshipTypeDAO relationshipTypeDAO,
            final EntityFactory entityFactory,
            final AnyUtilsFactory anyUtilsFactory,
            final DerAttrHandler derAttrHandler,
            final VirAttrHandler virAttrHandler,
            final MappingManager mappingManager,
            final IntAttrNameParser intAttrNameParser,
            final OutboundMatcher outboundMatcher,
            final SearchCondVisitor searchCondVisitor,
            final PlainAttrValidationManager validator) {

        super(anyTypeDAO,
                realmDAO,
                anyTypeClassDAO,
                anyObjectDAO,
                userDAO,
                groupDAO,
                plainSchemaDAO,
                plainAttrDAO,
                plainAttrValueDAO,
                resourceDAO,
                relationshipTypeDAO,
                entityFactory,
                anyUtilsFactory,
                derAttrHandler,
                virAttrHandler,
                mappingManager,
                intAttrNameParser,
                outboundMatcher,
                searchCondVisitor,
                validator);
        LOG.info ("using custom group data binder");
    }

    @Override
    public PropagationByResource<String> update(final Group toBeUpdated, final GroupUR groupUR) {
        // Re-merge any pending change from workflow tasks
        Group group = groupDAO.save(toBeUpdated);

        // Save projection on Resources (before update)
        Map<String, ConnObject> beforeOnResources =
                onResources(group, groupDAO.findAllResourceKeys(group.getKey()), null, Set.of());

        SyncopeClientCompositeException scce = SyncopeClientException.buildComposite();

        // realm
        setRealm(group, groupUR);

        // name
        if (groupUR.getName() != null && StringUtils.isNotBlank(groupUR.getName().getValue())) {
            group.setName(groupUR.getName().getValue());
        }

        // owner
        PropagationByResource<String> ownerPropByRes = new PropagationByResource<>();
        if (groupUR.getUserOwner() != null) {
            if (groupUR.getUserOwner().getValue() == null) {
                if (group.getUserOwner() != null) {
                    group.setUserOwner(null);
                    ownerPropByRes.addAll(ResourceOperation.UPDATE, groupDAO.findAllResourceKeys(group.getKey()));
                }
            } else {
                User userOwner = userDAO.find(groupUR.getUserOwner().getValue());
                if (userOwner == null) {
                    LOG.debug("Unable to find user owner for group {} by key {}",
                            group.getKey(), groupUR.getUserOwner().getValue());
                    group.setUserOwner(null);
                } else {
                    group.setUserOwner(userOwner);
                    ownerPropByRes.addAll(ResourceOperation.UPDATE, groupDAO.findAllResourceKeys(group.getKey()));
                }
            }
        }
        if (groupUR.getGroupOwner() != null) {
            if (groupUR.getGroupOwner().getValue() == null) {
                if (group.getGroupOwner() != null) {
                    group.setGroupOwner(null);
                    ownerPropByRes.addAll(ResourceOperation.UPDATE, groupDAO.findAllResourceKeys(group.getKey()));
                }
            } else {
                Group groupOwner = groupDAO.find(groupUR.getGroupOwner().getValue());
                if (groupOwner == null) {
                    LOG.debug("Unable to find group owner for group {} by key {}",
                            group.getKey(), groupUR.getGroupOwner().getValue());
                    group.setGroupOwner(null);
                } else {
                    group.setGroupOwner(groupOwner);
                    ownerPropByRes.addAll(ResourceOperation.UPDATE, groupDAO.findAllResourceKeys(group.getKey()));
                }
            }
        }

        // attributes and resources
        fill(group, groupUR, anyUtilsFactory.getInstance(AnyTypeKind.GROUP), scce);

        group = groupDAO.save(group);

        // dynamic membership
        if (groupUR.getUDynMembershipCond() == null) {
            if (group.getUDynMembership() != null) {
                group.getUDynMembership().setGroup(null);
                group.setUDynMembership(null);
            }
        } else {
            setDynMembership(group, anyTypeDAO.findUser(), groupUR.getUDynMembershipCond());
        }
        for (Iterator<? extends ADynGroupMembership> itor = group.getADynMemberships().iterator(); itor.hasNext();) {
            ADynGroupMembership memb = itor.next();
            memb.setGroup(null);
            itor.remove();
        }
        groupDAO.clearADynMembers(group);
        for (Map.Entry<String, String> entry : groupUR.getADynMembershipConds().entrySet()) {
            AnyType anyType = anyTypeDAO.find(entry.getKey());
            if (anyType == null) {
                LOG.warn("Ignoring invalid {}: {}", AnyType.class.getSimpleName(), entry.getKey());
            } else {
                setDynMembership(group, anyType, entry.getValue());
            }
        }

        group = groupDAO.saveAndRefreshDynMemberships(group);

        // type extensions
        for (TypeExtensionTO typeExtTO : groupUR.getTypeExtensions()) {
            AnyType anyType = anyTypeDAO.find(typeExtTO.getAnyType());
            if (anyType == null) {
                LOG.warn("Ignoring invalid {}: {}", AnyType.class.getSimpleName(), typeExtTO.getAnyType());
            } else {
                TypeExtension typeExt = group.getTypeExtension(anyType).orElse(null);
                if (typeExt == null) {
                    typeExt = entityFactory.newEntity(TypeExtension.class);
                    typeExt.setAnyType(anyType);
                    typeExt.setGroup(group);
                    group.add(typeExt);
                }

                // add all classes contained in the TO
                for (String name : typeExtTO.getAuxClasses()) {
                    AnyTypeClass anyTypeClass = anyTypeClassDAO.find(name);
                    if (anyTypeClass == null) {
                        LOG.warn("Ignoring invalid {}: {}", AnyTypeClass.class.getSimpleName(), name);
                    } else {
                        typeExt.add(anyTypeClass);
                    }
                }
                // remove all classes not contained in the TO
                typeExt.getAuxClasses().
                        removeIf(anyTypeClass -> !typeExtTO.getAuxClasses().contains(anyTypeClass.getKey()));

                // only consider non-empty type extensions
                if (typeExt.getAuxClasses().isEmpty()) {
                    group.getTypeExtensions().remove(typeExt);
                    typeExt.setGroup(null);
                }
            }
        }
        // remove all type extensions not contained in the TO
        group.getTypeExtensions().
                removeIf(typeExt -> groupUR.getTypeExtension(typeExt.getAnyType().getKey()).isEmpty());

        // Throw composite exception if there is at least one element set in the composing exceptions
        if (scce.hasExceptions()) {
            throw scce;
        }

        // Re-merge any pending change from above
        group = groupDAO.save(group);

        // Build final information for next stage (propagation)
        PropagationByResource<String> propByRes = propByRes(
                beforeOnResources, onResources(group, groupDAO.findAllResourceKeys(group.getKey()), null, Set.of()));
        propByRes.merge(ownerPropByRes);
        return propByRes;
    }
}