/*
 * The MIT License
 * Copyright © 2014-2019 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.iluwatar.iterator.list;

import com.iluwatar.iterator.Iterator;

/**
 * TreasureChestItemIterator.
 */
public class TreasureChestItemIterator implements Iterator<Item> {

  private final TreasureChest chest;
  private int idx;
  private final ItemType type;

  /**
   * Constructor.
   */
  public TreasureChestItemIterator(TreasureChest chest, ItemType type) {
    this.chest = chest;
    this.type = type;
    this.idx = -1;
  }

  @Override
  public boolean hasNext() {
    return findNextIdx() != -1;
  }

  @Override
  public Item next() {
    idx = findNextIdx();
    if (idx != -1) {
      return chest.getItems().get(idx);
    }
    return null;
  }

  private int findNextIdx() {
    var items = chest.getItems();
    var tempIdx = idx;
    while (true) {
      tempIdx++;
      if (tempIdx >= items.size()) {
        tempIdx = -1;
        break;
      }
      if (type.equals(ItemType.ANY) || items.get(tempIdx).getType().equals(type)) {
        break;
      }
    }
    return tempIdx;
  }
}
