/*
 * Copyright 2016 ThoughtWorks, Inc.
 *
 * 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 com.thoughtworks.go.server.dao;

import java.util.List;

import com.thoughtworks.go.config.EnvironmentVariableConfig;
import com.thoughtworks.go.config.EnvironmentVariablesConfig;
import com.thoughtworks.go.server.transaction.TransactionTemplate;
import org.hibernate.Criteria;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionCallbackWithoutResult;

@Component
public class EnvironmentVariableSqlMapDao implements EnvironmentVariableDao {
    private SessionFactory sessionFactory;
    private TransactionTemplate transactionTemplate;

    @Autowired
    public EnvironmentVariableSqlMapDao(SessionFactory sessionFactory, TransactionTemplate transactionTemplate) {
        this.sessionFactory = sessionFactory;
        this.transactionTemplate = transactionTemplate;
    }

    public void save(final Long entityId, final EnvironmentVariableType type, final EnvironmentVariablesConfig variables) {
        transactionTemplate.execute(new TransactionCallbackWithoutResult() {
            @Override protected void doInTransactionWithoutResult(TransactionStatus status) {
                for (EnvironmentVariableConfig variable : variables) {
                    EnvironmentVariableConfig environmentVariableConfig = new EnvironmentVariableConfig(variable);
                    environmentVariableConfig.setEntityId(entityId);
                    environmentVariableConfig.setEntityType(type.toString());
                    sessionFactory.getCurrentSession().save(environmentVariableConfig);
                }
            }
        });
    }

    public EnvironmentVariablesConfig load(final Long entityId, final EnvironmentVariableType type) {
        List<EnvironmentVariableConfig> result = (List<EnvironmentVariableConfig>) transactionTemplate.execute(new TransactionCallback() {
            @Override
            public Object doInTransaction(TransactionStatus transactionStatus) {
                Criteria criteria = sessionFactory.getCurrentSession().createCriteria(EnvironmentVariableConfig.class).add(Restrictions.eq("entityId", entityId)).add(
                        Restrictions.eq("entityType", type.toString())).addOrder(Order.asc("id"));
                criteria.setCacheable(true);
                return criteria.list();
            }
        });
        for (EnvironmentVariableConfig var : result) {
            var.ensureEncrypted();
        }
        return new EnvironmentVariablesConfig(result);
    }
}