/*
 * 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.iotdb.confignode.persistence.metric;

import org.apache.iotdb.common.rpc.thrift.TConsensusGroupType;
import org.apache.iotdb.commons.service.metric.enums.Metric;
import org.apache.iotdb.commons.service.metric.enums.Tag;
import org.apache.iotdb.confignode.persistence.partition.PartitionInfo;
import org.apache.iotdb.confignode.persistence.partition.StorageGroupPartitionTable;
import org.apache.iotdb.metrics.AbstractMetricService;
import org.apache.iotdb.metrics.metricsets.IMetricSet;
import org.apache.iotdb.metrics.utils.MetricLevel;
import org.apache.iotdb.metrics.utils.MetricType;

import java.util.Objects;

public class PartitionInfoMetrics implements IMetricSet {
  private PartitionInfo partitionInfo;

  public PartitionInfoMetrics(PartitionInfo partitionInfo) {
    this.partitionInfo = partitionInfo;
  }

  @Override
  public void bindTo(AbstractMetricService metricService) {
    metricService.createAutoGauge(
        Metric.QUANTITY.toString(),
        MetricLevel.IMPORTANT,
        partitionInfo,
        PartitionInfo::getStorageGroupPartitionTableSize,
        Tag.NAME.toString(),
        "database");
    metricService.createAutoGauge(
        Metric.REGION.toString(),
        MetricLevel.IMPORTANT,
        partitionInfo,
        o -> o.updateRegionGroupMetric(TConsensusGroupType.SchemaRegion),
        Tag.NAME.toString(),
        "total",
        Tag.TYPE.toString(),
        TConsensusGroupType.SchemaRegion.toString());
    metricService.createAutoGauge(
        Metric.REGION.toString(),
        MetricLevel.IMPORTANT,
        partitionInfo,
        o -> o.updateRegionGroupMetric(TConsensusGroupType.DataRegion),
        Tag.NAME.toString(),
        "total",
        Tag.TYPE.toString(),
        TConsensusGroupType.DataRegion.toString());
  }

  @Override
  public void unbindFrom(AbstractMetricService metricService) {
    metricService.remove(
        MetricType.AUTO_GAUGE, Metric.QUANTITY.toString(), Tag.NAME.toString(), "database");
    metricService.remove(
        MetricType.AUTO_GAUGE,
        Metric.REGION.toString(),
        Tag.NAME.toString(),
        "total",
        Tag.TYPE.toString(),
        TConsensusGroupType.SchemaRegion.toString());
    metricService.remove(
        MetricType.AUTO_GAUGE,
        Metric.REGION.toString(),
        Tag.NAME.toString(),
        "total",
        Tag.TYPE.toString(),
        TConsensusGroupType.DataRegion.toString());
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    PartitionInfoMetrics that = (PartitionInfoMetrics) o;
    return Objects.equals(partitionInfo, that.partitionInfo);
  }

  @Override
  public int hashCode() {
    return Objects.hash(partitionInfo);
  }

  public static class StorageGroupPartitionTableMetrics implements IMetricSet {
    private StorageGroupPartitionTable storageGroupPartitionTable;

    public StorageGroupPartitionTableMetrics(
        StorageGroupPartitionTable storageGroupPartitionTable) {
      this.storageGroupPartitionTable = storageGroupPartitionTable;
    }

    @Override
    public void bindTo(AbstractMetricService metricService) {
      metricService.createAutoGauge(
          Metric.REGION.toString(),
          MetricLevel.NORMAL,
          storageGroupPartitionTable,
          o -> o.getRegionGroupCount(TConsensusGroupType.SchemaRegion),
          Tag.NAME.toString(),
          storageGroupPartitionTable.getStorageGroupName(),
          Tag.TYPE.toString(),
          TConsensusGroupType.SchemaRegion.toString());
      metricService.createAutoGauge(
          Metric.REGION.toString(),
          MetricLevel.NORMAL,
          storageGroupPartitionTable,
          o -> o.getRegionGroupCount(TConsensusGroupType.DataRegion),
          Tag.NAME.toString(),
          storageGroupPartitionTable.getStorageGroupName(),
          Tag.TYPE.toString(),
          TConsensusGroupType.DataRegion.toString());
      // TODO slot will be updated in the future
      metricService.createAutoGauge(
          Metric.SLOT.toString(),
          MetricLevel.NORMAL,
          storageGroupPartitionTable,
          StorageGroupPartitionTable::getSchemaPartitionMapSize,
          Tag.NAME.toString(),
          storageGroupPartitionTable.getStorageGroupName(),
          Tag.TYPE.toString(),
          "schemaSlotNumber");
      metricService.createAutoGauge(
          Metric.SLOT.toString(),
          MetricLevel.NORMAL,
          storageGroupPartitionTable,
          StorageGroupPartitionTable::getDataPartitionMapSize,
          Tag.NAME.toString(),
          storageGroupPartitionTable.getStorageGroupName(),
          Tag.TYPE.toString(),
          "dataSlotNumber");
    }

    @Override
    public void unbindFrom(AbstractMetricService metricService) {
      metricService.remove(
          MetricType.AUTO_GAUGE,
          Metric.REGION.toString(),
          Tag.NAME.toString(),
          storageGroupPartitionTable.getStorageGroupName(),
          Tag.TYPE.toString(),
          TConsensusGroupType.SchemaRegion.toString());
      metricService.remove(
          MetricType.AUTO_GAUGE,
          Metric.REGION.toString(),
          Tag.NAME.toString(),
          storageGroupPartitionTable.getStorageGroupName(),
          Tag.TYPE.toString(),
          TConsensusGroupType.DataRegion.toString());
      // TODO slot will be updated in the future
      metricService.remove(
          MetricType.AUTO_GAUGE,
          Metric.SLOT.toString(),
          Tag.NAME.toString(),
          storageGroupPartitionTable.getStorageGroupName(),
          Tag.TYPE.toString(),
          "schemaSlotNumber");
      metricService.remove(
          MetricType.AUTO_GAUGE,
          Metric.SLOT.toString(),
          Tag.NAME.toString(),
          storageGroupPartitionTable.getStorageGroupName(),
          Tag.TYPE.toString(),
          "dataSlotNumber");
    }

    @Override
    public boolean equals(Object o) {
      if (this == o) return true;
      if (o == null || getClass() != o.getClass()) return false;
      StorageGroupPartitionTableMetrics that = (StorageGroupPartitionTableMetrics) o;
      return Objects.equals(storageGroupPartitionTable, that.storageGroupPartitionTable);
    }

    @Override
    public int hashCode() {
      return Objects.hash(storageGroupPartitionTable);
    }
  }
}
