/**
 * 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.smartdata.server.engine.rule;

import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.Path;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.smartdata.admin.SmartAdmin;
import org.smartdata.model.RuleInfo;
import org.smartdata.model.RuleState;
import org.smartdata.server.MiniSmartClusterHarness;

import java.util.List;
import java.util.Random;

public class TestSmallFileRule extends MiniSmartClusterHarness {

  @Before
  @Override
  public void init() throws Exception {
    super.init();
    createTestFiles();
  }

  private void createTestFiles() throws Exception {
    Path path = new Path("/test/small_files/");
    dfs.mkdirs(path);
    for (int i = 0; i < 3; i++) {
      String fileName = "/test/small_files/file_" + i;
      FSDataOutputStream out = dfs.create(new Path(fileName), (short) 1);
      long fileLen;
      fileLen = 5 + (int) (Math.random() * 11);
      byte[] buf = new byte[20];
      Random rb = new Random(2018);
      int bytesRemaining = (int) fileLen;
      while (bytesRemaining > 0) {
        rb.nextBytes(buf);
        int bytesToWrite = (bytesRemaining < buf.length) ? bytesRemaining : buf.length;
        out.write(buf, 0, bytesToWrite);
        bytesRemaining -= bytesToWrite;
      }
      out.close();
    }
  }

  @Test(timeout = 180000)
  public void testRule() throws Exception {
    waitTillSSMExitSafeMode();

    String rule = "file: path matches \"/test/small_files/file*\" and length < 20KB"
        + " | compact -containerFile \"/test/small_files/container_file_1\"";
    SmartAdmin admin = new SmartAdmin(smartContext.getConf());
    admin.submitRule(rule, RuleState.ACTIVE);

    Thread.sleep(6000);
    List<RuleInfo> ruleInfoList = admin.listRulesInfo();
    for (RuleInfo info : ruleInfoList) {
      System.out.println(info);
    }
    Assert.assertEquals(1, ruleInfoList.size());
  }

  @After
  public void tearDown() throws Exception {
    dfs.getClient().delete("/test", true);
  }
}
