/*
 * Copyright 2017 The Mifos Initiative.
 *
 * 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 io.mifos.deposit.service.internal.service;

import io.mifos.deposit.api.v1.definition.domain.ProductDefinition;
import io.mifos.deposit.api.v1.definition.domain.ProductDefinitionCommand;
import io.mifos.deposit.service.ServiceConstants;
import io.mifos.deposit.service.internal.mapper.ProductDefinitionCommandMapper;
import io.mifos.deposit.service.internal.mapper.ProductDefinitionMapper;
import io.mifos.deposit.service.internal.repository.ProductDefinitionCommandRepository;
import io.mifos.deposit.service.internal.repository.ProductDefinitionRepository;
import org.slf4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;

@Service
public class ProductDefinitionService {

  private final Logger logger;
  private final ProductDefinitionRepository productDefinitionRepository;
  private final ProductDefinitionCommandRepository productDefinitionCommandRepository;

  @Autowired
  public ProductDefinitionService(@Qualifier(ServiceConstants.LOGGER_NAME) final Logger logger,
                                  final ProductDefinitionRepository productDefinitionRepository,
                                  final ProductDefinitionCommandRepository productDefinitionCommandRepository) {
    super();
    this.logger = logger;
    this.productDefinitionRepository = productDefinitionRepository;
    this.productDefinitionCommandRepository = productDefinitionCommandRepository;
  }

  public List<ProductDefinition> fetchProductDefinitions() {
    return this.productDefinitionRepository.findAll()
        .stream()
        .map(ProductDefinitionMapper::map)
        .collect(Collectors.toList());
  }

  public Optional<ProductDefinition> findProductDefinition(final String identifier) {
    return this.productDefinitionRepository.findByIdentifier(identifier).map(ProductDefinitionMapper::map);
  }

  public List<ProductDefinitionCommand> findCommands(final String identifier) {
    return this.productDefinitionRepository.findByIdentifier(identifier)
        .map(productDefinitionEntity -> this.productDefinitionCommandRepository.findByProductDefinition(productDefinitionEntity)
            .stream()
            .map(ProductDefinitionCommandMapper::map)
            .collect(Collectors.toList()))
        .orElseGet(Collections::emptyList);
  }
}