/*
 * 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.fineract.cn.provisioner.internal.service;

import com.datastax.driver.core.ResultSet;
import com.datastax.driver.mapping.Mapper;
import com.datastax.driver.mapping.Result;
import org.apache.fineract.cn.provisioner.config.ProvisionerConstants;
import org.apache.fineract.cn.provisioner.internal.repository.ApplicationEntity;
import java.util.ArrayList;
import java.util.List;
import org.apache.fineract.cn.cassandra.core.CassandraSessionProvider;
import org.apache.fineract.cn.lang.ServiceException;
import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;

@Component
public class ApplicationService {

  private final Logger logger;
  private final CassandraSessionProvider cassandraSessionProvider;
  private final TenantApplicationService tenantApplicationService;

  @Autowired
  public ApplicationService(@Qualifier(ProvisionerConstants.LOGGER_NAME) final Logger logger,
                            final CassandraSessionProvider cassandraSessionProvider,
                            final TenantApplicationService tenantApplicationService) {
    super();
    this.logger = logger;
    this.cassandraSessionProvider = cassandraSessionProvider;
    this.tenantApplicationService = tenantApplicationService;
  }

  public void create(final ApplicationEntity applicationEntity) {
    final Mapper<ApplicationEntity> applicationEntityMapper =
        this.cassandraSessionProvider.getAdminSessionMappingManager().mapper(ApplicationEntity.class);

    if (applicationEntityMapper.get(applicationEntity.getName()) != null) {
      this.logger.warn("Tried to create duplicate application {}!", applicationEntity.getName());
      throw ServiceException.conflict("Application {0} already exists!", applicationEntity.getName());
    }

    applicationEntityMapper.save(applicationEntity);
  }

  public ApplicationEntity find(final String name) {
    final Mapper<ApplicationEntity> applicationEntityMapper =
        this.cassandraSessionProvider.getAdminSessionMappingManager().mapper(ApplicationEntity.class);

    final ApplicationEntity applicationEntity = applicationEntityMapper.get(name);
    if (applicationEntity == null) {
      this.logger.warn("Tried to find unknown application {}!", name);
      throw ServiceException.notFound("Application {0} not found!", name);
    }

    return applicationEntity;
  }

  public List<ApplicationEntity> fetchAll() {
    final ArrayList<ApplicationEntity> applicationEntities = new ArrayList<>();

    final ResultSet resultSet =
        this.cassandraSessionProvider.getAdminSession().execute(" SELECT * FROM applications ");

    final Mapper<ApplicationEntity> applicationEntityMapper =
        this.cassandraSessionProvider.getAdminSessionMappingManager().mapper(ApplicationEntity.class);

    if (resultSet != null) {
      final Result<ApplicationEntity> mappedApplicationEntities = applicationEntityMapper.map(resultSet);
      applicationEntities.addAll(mappedApplicationEntities.all());
    }

    return applicationEntities;
  }

  public void delete(final String name) {
    final Mapper<ApplicationEntity> applicationEntityMapper =
        this.cassandraSessionProvider.getAdminSessionMappingManager().mapper(ApplicationEntity.class);

    applicationEntityMapper.delete(name);
    this.tenantApplicationService.removeApplication(name);
  }
}