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/*
 * Copyright © 2016-2017 European Support Limited
 *
 * 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 org.openecomp.sdc.validation.impl.validators.heatresource;

import org.apache.commons.collections4.CollectionUtils;
import org.openecomp.core.validation.ErrorMessageCode;
import org.openecomp.core.validation.errors.ErrorMessagesFormatBuilder;
import org.openecomp.core.validation.types.GlobalValidationContext;
import org.openecomp.sdc.common.errors.Messages;
import org.openecomp.sdc.datatypes.error.ErrorLevel;
import org.openecomp.sdc.heat.datatypes.model.Resource;
import org.openecomp.sdc.validation.ResourceValidator;
import org.openecomp.sdc.validation.ValidationContext;
import org.openecomp.sdc.validation.impl.util.HeatValidationService;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;

/**
 * Created by TALIO on 2/22/2017.
 */
public class NestedResourceValidator implements ResourceValidator {
  private static final ErrorMessageCode ERROR_CODE_HNR1 = new ErrorMessageCode("HNR1");
  private static final ErrorMessageCode ERROR_CODE_HNR2 = new ErrorMessageCode("HNR2");
  private static final ErrorMessageCode ERROR_CODE_HNR3 = new ErrorMessageCode("HNR3");
  private static final ErrorMessageCode ERROR_CODE_HNR4 = new ErrorMessageCode("HNR4");

  @Override
  public void validate(String fileName, Map.Entry<String, Resource> resourceEntry,
                       GlobalValidationContext globalContext, ValidationContext validationContext) {

    handleNestedResourceType(fileName, resourceEntry.getKey(), resourceEntry.getValue(),
            Optional.empty(), globalContext);
  }

  private static void handleNestedResourceType(String fileName, String resourceName,
                                               Resource resource, Optional<String> indexVarValue,
                                               GlobalValidationContext globalContext) {
    validateAllPropertiesMatchNestedParameters(fileName, resourceName, resource, indexVarValue,
            globalContext);
    validateLoopsOfNestingFromFile(fileName, resource.getType(), globalContext);
  }

  public static void validateAllPropertiesMatchNestedParameters(String fileName,
                                                                String resourceName,
                                                                Resource resource,
                                                                Optional<String> indexVarValue,
                                                                GlobalValidationContext
                                                                        globalContext) {
    String resourceType = resource.getType();
    if (globalContext.getFileContextMap().containsKey(resourceType)) {
      Set<String> propertiesNames =
              resource.getProperties() == null ? null : resource.getProperties().keySet();
      if (CollectionUtils.isNotEmpty(propertiesNames)) {
        globalContext.setMessageCode(ERROR_CODE_HNR3);
        HeatValidationService
                .checkNestedParametersNoMissingParameterInNested(fileName, resourceType, resourceName,
                         propertiesNames,
                         globalContext);
        globalContext.setMessageCode(ERROR_CODE_HNR4);
        HeatValidationService
                .checkNestedInputValuesAlignWithType(fileName, resourceType, resourceName, resource,
                        indexVarValue, globalContext);
      }
    } else {
      globalContext.addMessage(resourceType, ErrorLevel.ERROR, ErrorMessagesFormatBuilder
                      .getErrorWithParameters(ERROR_CODE_HNR1,
                              Messages.MISSING_NESTED_FILE.getErrorMessage(),
                              resourceType));
    }
  }

  public static void validateLoopsOfNestingFromFile(String fileName, String resourceType,
                                                    GlobalValidationContext globalContext) {
    List<String> filesInLoop = new ArrayList<>(Collections.singletonList(fileName));
    if (HeatValidationService
            .isNestedLoopExistInFile(fileName, resourceType, filesInLoop, globalContext)) {
      globalContext.addMessage(fileName, ErrorLevel.ERROR, ErrorMessagesFormatBuilder
                      .getErrorWithParameters(ERROR_CODE_HNR2, Messages.NESTED_LOOP.getErrorMessage(),
                              HeatValidationService.drawFilesLoop(filesInLoop)));
    }
  }
}