/*
 * 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.accumulo.core.client;

import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import org.apache.accumulo.core.client.impl.ClientContext;
import org.apache.accumulo.core.client.impl.Table;
import org.apache.accumulo.core.client.impl.Tables;
import org.apache.accumulo.core.client.security.SecurityErrorCode;
import org.apache.accumulo.core.data.ConstraintViolationSummary;
import org.apache.accumulo.core.data.TabletId;

/**
 * Communicate the failed mutations of a BatchWriter back to the client.
 */
public class MutationsRejectedException extends AccumuloException {
  private static final long serialVersionUID = 1L;

  private List<ConstraintViolationSummary> cvsl;
  private Map<TabletId,Set<SecurityErrorCode>> af;
  private Collection<String> es;
  private int unknownErrors;

  /**
   *
   * @param cvsList
   *          list of constraint violations
   * @param hashMap
   *          authorization failures
   * @param serverSideErrors
   *          server side errors
   * @param unknownErrors
   *          number of unknown errors
   *
   * @since 1.7.0
   * @deprecated since 2.0.0, replaced by
   *             {@link #MutationsRejectedException(ClientInfo, List, Map, Collection, int, Throwable)}
   */
  @Deprecated
  public MutationsRejectedException(Instance instance, List<ConstraintViolationSummary> cvsList,
      Map<TabletId,Set<SecurityErrorCode>> hashMap, Collection<String> serverSideErrors,
      int unknownErrors, Throwable cause) {
    super(
        "# constraint violations : " + cvsList.size() + "  security codes: " + hashMap.toString()
            + "  # server errors " + serverSideErrors.size() + " # exceptions " + unknownErrors,
        cause);
    this.cvsl = cvsList;
    this.af = hashMap;
    this.es = serverSideErrors;
    this.unknownErrors = unknownErrors;
  }

  /**
   * Creates Mutations rejected exception
   *
   * @param info
   *          Client info
   * @param cvsList
   *          list of constraint violations
   * @param hashMap
   *          authorization failures
   * @param serverSideErrors
   *          server side errors
   * @param unknownErrors
   *          number of unknown errors
   *
   * @since 2.0.0
   */
  public MutationsRejectedException(ClientInfo info, List<ConstraintViolationSummary> cvsList,
      Map<TabletId,Set<SecurityErrorCode>> hashMap, Collection<String> serverSideErrors,
      int unknownErrors, Throwable cause) {
    super("# constraint violations : " + cvsList.size() + "  security codes: "
        + format(hashMap, new ClientContext(info)) + "  # server errors " + serverSideErrors.size()
        + " # exceptions " + unknownErrors, cause);
    this.cvsl = cvsList;
    this.af = hashMap;
    this.es = serverSideErrors;
    this.unknownErrors = unknownErrors;
  }

  private static String format(Map<TabletId,Set<SecurityErrorCode>> hashMap,
      ClientContext context) {
    Map<String,Set<SecurityErrorCode>> result = new HashMap<>();

    for (Entry<TabletId,Set<SecurityErrorCode>> entry : hashMap.entrySet()) {
      TabletId tabletId = entry.getKey();
      String tableInfo = Tables.getPrintableTableInfoFromId(context,
          Table.ID.of(tabletId.getTableId().toString()));

      if (!result.containsKey(tableInfo)) {
        result.put(tableInfo, new HashSet<>());
      }

      result.get(tableInfo).addAll(hashMap.get(tabletId));
    }

    return result.toString();
  }

  /**
   * @return the internal list of constraint violations
   */
  public List<ConstraintViolationSummary> getConstraintViolationSummaries() {
    return cvsl;
  }

  /**
   * @return the internal mapping of TabletID to SecurityErrorCodes
   */
  public Map<TabletId,Set<SecurityErrorCode>> getSecurityErrorCodes() {
    return af;
  }

  /**
   *
   * @return A list of servers that had internal errors when mutations were written
   *
   */
  public Collection<String> getErrorServers() {
    return es;
  }

  /**
   *
   * @return a count of unknown exceptions that occurred during processing
   */
  public int getUnknownExceptions() {
    return unknownErrors;
  }
}