/*
 * Copyright 2018 LinkedIn Corp. Licensed under the BSD 2-Clause License (the "License"). See License in the project root for license information.
 */

package com.linkedin.kafka.cruisecontrol.servlet.parameters;

import com.linkedin.kafka.cruisecontrol.servlet.CruiseControlEndPoint;
import com.linkedin.kafka.cruisecontrol.servlet.UserRequestException;
import java.io.UnsupportedEncodingException;
import java.util.Collections;
import java.util.Map;
import java.util.SortedSet;
import java.util.TreeSet;

import static com.linkedin.kafka.cruisecontrol.servlet.parameters.ParameterUtils.START_MS_PARAM;
import static com.linkedin.kafka.cruisecontrol.servlet.parameters.ParameterUtils.END_MS_PARAM;
import static com.linkedin.kafka.cruisecontrol.servlet.parameters.ParameterUtils.CLEAR_METRICS_PARAM;


/**
 * Parameters for {@link CruiseControlEndPoint#BOOTSTRAP}
 *
 * <pre>
 * 1. RANGE MODE:
 *    GET /kafkacruisecontrol/bootstrap?start=[START_TIMESTAMP]&amp;end=[END_TIMESTAMP]&amp;clearmetrics=[true/false]
 *    &amp;json=[true/false]&amp;get_response_schema=[true/false]
 * 2. SINCE MODE:
 *    GET /kafkacruisecontrol/bootstrap?start=[START_TIMESTAMP]&amp;clearmetrics=[true/false]&amp;json=[true/false]
 *    &amp;get_response_schema=[true/false]
 * 3. RECENT MODE:
 *    GET /kafkacruisecontrol/bootstrap?clearmetrics=[true/false]&amp;json=[true/false]
 *    &amp;get_response_schema=[true/false]
 * </pre>
 */
public class BootstrapParameters extends AbstractParameters {
  protected static final SortedSet<String> CASE_INSENSITIVE_PARAMETER_NAMES;
  static {
    SortedSet<String> validParameterNames = new TreeSet<>(String.CASE_INSENSITIVE_ORDER);
    validParameterNames.add(START_MS_PARAM);
    validParameterNames.add(END_MS_PARAM);
    validParameterNames.add(CLEAR_METRICS_PARAM);
    validParameterNames.addAll(AbstractParameters.CASE_INSENSITIVE_PARAMETER_NAMES);
    CASE_INSENSITIVE_PARAMETER_NAMES = Collections.unmodifiableSortedSet(validParameterNames);
  }
  protected Long _startMs;
  protected Long _endMs;
  protected boolean _clearMetrics;

  public BootstrapParameters() {
    super();
  }

  @Override
  protected void initParameters() throws UnsupportedEncodingException {
    super.initParameters();
    _startMs = ParameterUtils.startMsOrDefault(_request, null);
    _endMs = ParameterUtils.endMsOrDefault(_request, null);
    _clearMetrics = ParameterUtils.clearMetrics(_request);
    if (_startMs == null && _endMs != null) {
      throw new UserRequestException("The start time cannot be empty when end time is specified.");
    }
    if (_startMs != null && _endMs != null) {
      ParameterUtils.validateTimeRange(_startMs, _endMs);
    }
  }

  public Long startMs() {
    return _startMs;
  }

  public Long endMs() {
    return _endMs;
  }

  public boolean clearMetrics() {
    return _clearMetrics;
  }

  @Override
  public void configure(Map<String, ?> configs) {
    super.configure(configs);
  }

  @Override
  public SortedSet<String> caseInsensitiveParameterNames() {
    return CASE_INSENSITIVE_PARAMETER_NAMES;
  }
}
