/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.core.validation.util;

import org.openecomp.sdc.datatypes.error.ErrorLevel;
import org.openecomp.sdc.datatypes.error.ErrorMessage;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


public class MessageContainerUtil {
  /**
   * Gets message by level.
   *
   * @param level    the level
   * @param messages the messages
   * @return the message by level
   */
  public static Map<String, List<ErrorMessage>> getMessageByLevel(ErrorLevel level,
                                                                  Map<String, List<ErrorMessage>>
                                                                      messages) {
    if (messages == null) {
      return null;
    }
    Map<String, List<ErrorMessage>> filteredMessages = new HashMap<>();
    messages.entrySet().forEach(
        entry -> entry.getValue().stream().filter(message -> message.getLevel().equals(level))
            .forEach(message -> addMessage(entry.getKey(), message, filteredMessages
            )));
    return filteredMessages;
  }

  private static void addMessage(String fileName, ErrorMessage message,
                                 Map<String, List<ErrorMessage>> messages) {
    List<ErrorMessage> messageList = messages.computeIfAbsent(fileName, k -> new ArrayList<>());
    messageList.add(message);
  }

  public static String getErrorMessagesListAsString(Map<String, List<ErrorMessage>> messages) {
    StringBuilder concatErrorMessage = new StringBuilder();

    for (Map.Entry<String, List<ErrorMessage>> errorMessageEntry : messages.entrySet()) {
      appendErrorMessageAsString(concatErrorMessage, errorMessageEntry.getKey(),
          errorMessageEntry.getValue());
    }
    return concatErrorMessage.toString();
  }

  private static void appendErrorMessageAsString(StringBuilder concatErrorMessage,
                                                 String fileName,
                                                 List<ErrorMessage> errorMessageList) {
    for (ErrorMessage errorMessage : errorMessageList) {
      addErrorMessage(concatErrorMessage, fileName, errorMessage);
    }
  }

  private static void addErrorMessage(StringBuilder concatErrorMessage,
                                      String fileName,
                                      ErrorMessage errorMessage) {
    concatErrorMessage.append(fileName).append(" : ");
    concatErrorMessage.append(errorMessage.getMessage());
    concatErrorMessage.append("\n");
  }
}