/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.core;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertEquals;

import ch.qos.logback.core.contention.RunnableWithCounterAndDone;
import ch.qos.logback.core.encoder.EchoEncoder;
import ch.qos.logback.core.status.OnConsoleStatusListener;
import ch.qos.logback.core.testUtil.RandomUtil;
import ch.qos.logback.core.util.CoreTestConstants;

public class PrudentFileAppenderInterruptTest {

  FileAppender<Object> fa = new FileAppender<Object>();
  Context context = new ContextBase();
  int diff = RandomUtil.getPositiveInt();
  String outputDirStr = CoreTestConstants.OUTPUT_DIR_PREFIX + "resilience-" + diff + "/";
  String logfileStr = outputDirStr + "output.log";

  @Before
  public void setUp() throws InterruptedException {
    context.getStatusManager().add(new OnConsoleStatusListener());

    File outputDir = new File(outputDirStr);
    outputDir.mkdirs();

    fa.setContext(context);
    fa.setName("FILE");
    fa.setPrudent(true);
    fa.setEncoder(new EchoEncoder<Object>());
    fa.setFile(logfileStr);
    fa.start();
  }

  @Test
  public void smoke() throws InterruptedException, IOException {
    Runner runner = new Runner(fa);
    Thread t = new Thread(runner);
    t.start();

    runner.latch.await();

    fa.doAppend("hello not interrupted");

    FileReader fr = new FileReader(logfileStr);
    BufferedReader br = new BufferedReader(fr);

    int totalLines = 0;
    while (br.readLine() != null) {
      totalLines++; // In this test, the content of the file does not matter
    }
    fr.close();
    br.close();

    assertEquals("Incorrect number of logged lines", 2, totalLines);
  }

  class Runner extends RunnableWithCounterAndDone {
    FileAppender<Object> fa;
    CountDownLatch latch = new CountDownLatch(1); // Just to make sure this is executed before we log in the test method

    Runner(FileAppender<Object> fa) {
      this.fa = fa;
    }

    public void run() {
      Thread.currentThread().interrupt();
      fa.doAppend("hello interrupted");
      latch.countDown();
    }
  }

}