/*
 * 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.ignite.internal.catalog.storage;

import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Random id/name generator.
 */
final class TestDescriptorState {
    private final Random random = new Random();

    private final AtomicInteger idStart = new AtomicInteger();

    private final Map<String, AtomicInteger> uniqueNames = new HashMap<>();

    TestDescriptorState(long seed) {
        random.setSeed(seed);
        idStart.set(random.nextInt(Integer.MAX_VALUE / 2));
    }

    int id() {
        int id = idStart.incrementAndGet();
        if (id < 0) {
            throw new IllegalArgumentException("Id overflow");
        }
        return id;
    }

    String name(String prefix) {
        AtomicInteger names = uniqueNames.computeIfAbsent(prefix, (k) -> new AtomicInteger());
        return prefix + names.incrementAndGet();
    }

    Random random() {
        return random;
    }
}
