/*
 * Copyright 2016 EPAM Systems
 *
 *
 * This file is part of EPAM Report Portal.
 * https://github.com/reportportal/commons-dao
 *
 * Report Portal is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Report Portal is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Report Portal.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.epam.ta.reportportal.triggers;

import com.epam.ta.reportportal.database.dao.LogRepository;
import com.epam.ta.reportportal.database.entity.item.RetryType;
import com.epam.ta.reportportal.database.entity.item.TestItem;
import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.convert.QueryMapper;
import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
import org.springframework.data.mongodb.core.mapping.event.AbstractMongoEventListener;
import org.springframework.data.mongodb.core.mapping.event.BeforeDeleteEvent;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Optional;

import static java.util.Collections.singletonList;
import static java.util.stream.Collectors.toList;
import static java.util.stream.StreamSupport.stream;

/**
 * @author Dzmitry Kavalets
 */
@Service
public class DeleteItemsListener extends AbstractMongoEventListener<TestItem> {

	private MongoTemplate mongoTemplate;
	private LogRepository logRepository;
	private QueryMapper queryMapper;
	private MongoMappingContext mappingContext;

	@Autowired
	public DeleteItemsListener(MongoTemplate mongoTemplate, LogRepository logRepository, MongoMappingContext mappingContext) {
		this.mongoTemplate = mongoTemplate;
		this.logRepository = logRepository;
		this.queryMapper = new QueryMapper(mongoTemplate.getConverter());
		this.mappingContext = mappingContext;
	}

	@Override
	public void onBeforeDelete(BeforeDeleteEvent<TestItem> event) {
		DBObject dbqo = queryMapper.getMappedObject(event.getDBObject(), mappingContext.getPersistentEntity(TestItem.class));
		for (DBObject dbObject : mongoTemplate.getCollection(event.getCollectionName()).find(dbqo)) {
			Optional<RetryType> retryType = RetryType.fromString((String) dbObject.get("retryType"));
			if (retryType.isPresent() && retryType.get().equals(RetryType.LAST)) {
				List<TestItem> retries = (List<TestItem>) dbObject.get("retries");
				retries.stream().forEach(it -> clearItemData(event.getCollectionName(), it.getId()));
			} else {
				final String id = dbObject.get("_id").toString();
				clearItemData(event.getCollectionName(), id);
			}
		}
	}

	private void clearItemData(String collectionName, String id) {
		final BasicDBObject itemDescendantsQuery = new BasicDBObject("path", new BasicDBObject("$in", singletonList(id)));
		final List<String> itemIds = stream(
				mongoTemplate.getCollection(collectionName).find(itemDescendantsQuery).spliterator(), false).map(
				it -> it.get("_id").toString()).collect(toList());
		mongoTemplate.getCollection(collectionName).remove(itemDescendantsQuery);
		itemIds.add(id);
		logRepository.deleteByItemRef(itemIds);
	}
}

@@ -2990,13 +2990,39 @@
 %09%09%09%7D
- else
+%0A%09%09%09if (!retryType.isPresent())
  %7B%0A%09

fix cascade deleting