/*
    * Copyright 2021 TiKV Project Authors.
    *
    * 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.tikv.common.replica;
  
  import static com.google.common.base.MoreObjects.toStringHelper;
  
  import java.util.Iterator;
  import java.util.List;
  import org.tikv.common.region.TiStore;
  import org.tikv.kvproto.Metapb;
  
  public class Region {
    private final Metapb.Region region;
    private final Store[] stores;
    private Store leaderStore;
  
    public Region(
        final Metapb.Region region,
        final Metapb.Peer leader,
        final List<Metapb.Peer> peers,
        final List<TiStore> stores) {
      this.region = region;
      this.stores = new Store[stores.size()];
      Iterator<Metapb.Peer> peer = peers.iterator();
      Iterator<TiStore> store = stores.iterator();
      for (int idx = 0; idx < peers.size(); idx++) {
        Metapb.Peer currentPeer = peer.next();
        boolean isLeader = currentPeer.equals(leader);
        this.stores[idx] = new Store(currentPeer, store.next().getStore(), isLeader);
        if (isLeader) {
          leaderStore = this.stores[idx];
        }
      }
    }
  
    public Store[] getStores() {
      return stores;
    }
  
    public Store getLeader() {
      return leaderStore;
    }
  
    public long getId() {
      return region.getId();
    }
  
    public byte[] getStartKey() {
      return region.getStartKey().toByteArray();
    }
  
    public byte[] getEndKey() {
      return region.getEndKey().toByteArray();
    }
  
    public String toString() {
      return toStringHelper(this).add("region", region).add("stores", stores).toString();
    }
  }