/*
 * Copyright 2017 Kuelap, 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 io.mifos.individuallending.internal.service;

import io.mifos.portfolio.api.v1.domain.ChargeDefinition;
import org.mockito.Mockito;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class DefaultChargeDefinitionsMocker {
  private static Stream<ChargeDefinition> charges() {
    return Stream.concat(ChargeDefinitionService.defaultConfigurableIndividualLoanCharges(),
        ChargeDefinitionService.individualLoanChargesDerivedFromConfiguration());
  }

  public static ChargeDefinitionService getChargeDefinitionService(final List<ChargeDefinition> changedCharges) {
    final Map<String, ChargeDefinition> changedChargesMap = changedCharges.stream()
        .collect(Collectors.toMap(ChargeDefinition::getIdentifier, x -> x));

    final List<ChargeDefinition> defaultChargesWithFeesReplaced =
        charges().map(x -> changedChargesMap.getOrDefault(x.getIdentifier(), x))
            .collect(Collectors.toList());


    final ChargeDefinitionService configurableChargeDefinitionServiceMock = Mockito.mock(ChargeDefinitionService.class);
    final Map<String, List<ChargeDefinition>> chargeDefinitionsByChargeAction = defaultChargesWithFeesReplaced.stream()
        .collect(Collectors.groupingBy(ChargeDefinition::getChargeAction,
            Collectors.mapping(x -> x, Collectors.toList())));
    final Map<String, List<ChargeDefinition>> chargeDefinitionsByAccrueAction = defaultChargesWithFeesReplaced.stream()
        .filter(x -> x.getAccrueAction() != null)
        .collect(Collectors.groupingBy(ChargeDefinition::getAccrueAction,
            Collectors.mapping(x -> x, Collectors.toList())));
    Mockito.doReturn(chargeDefinitionsByChargeAction).when(configurableChargeDefinitionServiceMock).getChargeDefinitionsMappedByChargeAction(Mockito.any());
    Mockito.doReturn(chargeDefinitionsByAccrueAction).when(configurableChargeDefinitionServiceMock).getChargeDefinitionsMappedByAccrueAction(Mockito.any());

    return configurableChargeDefinitionServiceMock;
  }
}