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package de.taimos.dvalin.test.jaxrs;

/*
 * #%L
 * Daemon with Spring and CXF
 * %%
 * Copyright (C) 2013 - 2015 Taimos GmbH
 * %%
 * 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.
 * #L%
 */

import java.math.BigDecimal;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import org.junit.Assert;

/**
 * Assert tooling for asynchronous callbacks
 *
 * @author thoeger
 */
public class AsyncAssert {

    private final CountDownLatch cdl;
    private AssertionError ae = null;


    /**
     * Init with a count of 1
     */
    public AsyncAssert() {
        this(1);
    }

    /**
     * Init
     *
     * @param count the number of success calls are needed to pass
     */
    public AsyncAssert(int count) {
        this.cdl = new CountDownLatch(count);
    }

    public void assertTrue(String message, boolean condition) {
        if (!condition) {
            this.fail(message);
        }
    }

    public void assertTrue(boolean condition) {
        this.assertTrue("Value was expected to be true", condition);
    }

    public void assertFalse(String message, boolean condition) {
        this.assertTrue(message, !condition);
    }

    public void assertFalse(boolean condition) {
        this.assertFalse("Value was expected to be false", condition);
    }

    public void assertNotNull(Object o) {
        this.assertNotNull("Value was expected not to be null", o);
    }

    public void assertNotNull(String message, Object o) {
        this.assertTrue(message, o != null);
    }

    public void assertEquals(Object expected, Object actual) {
        this.assertEquals("Value was expected to be " + expected + " but was " + actual, expected, actual);
    }

    public void assertEquals(String message, Object expected, Object actual) {
        this.assertTrue(message, ((expected == null) && (actual == null)) || ((expected != null) && expected.equals(actual)));
    }

    public void assertSame(BigDecimal expected, BigDecimal actual) {
        this.assertEquals("Value was expected to be " + expected + " but was " + actual, expected, actual);
    }

    public void assertSame(String message, BigDecimal expected, BigDecimal actual) {
        this.assertTrue(message, ((expected == null) && (actual == null)) || ((expected != null) && (expected.compareTo(actual) == 0)));
    }

    public void fail() {
        this.fail(null);
    }

    public void fail(String message) {
        if (message == null) {
            this.ae = new AssertionError();
        }
        this.ae = new AssertionError(message);
        this.cdl.countDown();
        throw this.ae;
    }

    public void success() {
        this.cdl.countDown();
    }

    public void awaitOneSecond() {
        this.await(1, TimeUnit.SECONDS);
    }

    public void await(long timeout, TimeUnit unit) {
        try {
            if (this.cdl.await(timeout, unit)) {
                if (this.ae != null) {
                    throw this.ae;
                }
                return;
            }
            Assert.fail("Timeout reached");
        } catch (InterruptedException e) {
            Assert.fail(e.getMessage());
            Thread.currentThread().interrupt();
        }
    }

}