/**
 * 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.hcatalog.hbase;

import static org.junit.Assert.assertEquals;

import java.net.URI;
import java.util.HashMap;
import java.util.Map;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.cli.CliSessionState;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import org.apache.hadoop.hive.ql.processors.CommandProcessorResponse;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hcatalog.cli.HCatDriver;
import org.apache.hcatalog.cli.SemanticAnalysis.HCatSemanticAnalyzer;
import org.apache.hcatalog.common.HCatConstants;
import org.apache.hcatalog.common.HCatUtil;
import org.apache.hcatalog.hbase.snapshot.TableSnapshot;
import org.apache.hcatalog.mapreduce.InitializeInput;
import org.apache.hcatalog.mapreduce.InputJobInfo;
import org.junit.Test;

public class TestSnapshots extends SkeletonHBaseTest {
    private static HiveConf hcatConf;
    private static HCatDriver hcatDriver;

    public void Initialize() throws Exception {
        hcatConf = getHiveConf();
        hcatConf.set(ConfVars.SEMANTIC_ANALYZER_HOOK.varname,
            HCatSemanticAnalyzer.class.getName());
        URI fsuri = getFileSystem().getUri();
        Path whPath = new Path(fsuri.getScheme(), fsuri.getAuthority(),
            getTestDir());
        hcatConf.set(HiveConf.ConfVars.HADOOPFS.varname, fsuri.toString());
        hcatConf.set(ConfVars.METASTOREWAREHOUSE.varname, whPath.toString());

        //Add hbase properties

        for (Map.Entry<String, String> el : getHbaseConf()) {
            if (el.getKey().startsWith("hbase.")) {
                hcatConf.set(el.getKey(), el.getValue());
            }
        }

        SessionState.start(new CliSessionState(hcatConf));
        hcatDriver = new HCatDriver();

    }

    @Test
    public void TestSnapshotConversion() throws Exception {
        Initialize();
        String tableName = newTableName("mytableOne");
        String databaseName = newTableName("mydatabase");
        String fullyQualTableName = databaseName + "." + tableName;
        String db_dir = getTestDir() + "/hbasedb";
        String dbquery = "CREATE DATABASE IF NOT EXISTS " + databaseName + " LOCATION '"
            + db_dir + "'";
        String tableQuery = "CREATE TABLE " + fullyQualTableName
            + "(key string, value1 string, value2 string) STORED BY " +
            "'org.apache.hcatalog.hbase.HBaseHCatStorageHandler'"
            + "TBLPROPERTIES ('hbase.columns.mapping'=':key,cf1:q1,cf2:q2')";

        CommandProcessorResponse cmdResponse = hcatDriver.run(dbquery);
        assertEquals(0, cmdResponse.getResponseCode());
        cmdResponse = hcatDriver.run(tableQuery);
        assertEquals(0, cmdResponse.getResponseCode());

        InputJobInfo inputInfo = InputJobInfo.create(databaseName, tableName, null);
        Configuration conf = new Configuration(hcatConf);
        conf.set(HCatConstants.HCAT_KEY_HIVE_CONF,
            HCatUtil.serialize(getHiveConf().getAllProperties()));
        Job job = new Job(conf);
        inputInfo.getProperties().setProperty(HBaseConstants.PROPERTY_TABLE_SNAPSHOT_KEY, "dummysnapshot");
        InitializeInput.setInput(job, inputInfo);
        String modifiedInputInfo = job.getConfiguration().get(HCatConstants.HCAT_KEY_JOB_INFO);
        inputInfo = (InputJobInfo) HCatUtil.deserialize(modifiedInputInfo);

        Map<String, Long> revMap = new HashMap<String, Long>();
        revMap.put("cf1", 3L);
        revMap.put("cf2", 5L);
        TableSnapshot hbaseSnapshot = new TableSnapshot(fullyQualTableName, revMap, -1);
        HCatTableSnapshot hcatSnapshot = HBaseRevisionManagerUtil.convertSnapshot(hbaseSnapshot, inputInfo.getTableInfo());

        assertEquals(hcatSnapshot.getRevision("value1"), 3);
        assertEquals(hcatSnapshot.getRevision("value2"), 5);

        String dropTable = "DROP TABLE " + fullyQualTableName;
        cmdResponse = hcatDriver.run(dropTable);
        assertEquals(0, cmdResponse.getResponseCode());

        tableName = newTableName("mytableTwo");
        fullyQualTableName = databaseName + "." + tableName;
        tableQuery = "CREATE TABLE " + fullyQualTableName
            + "(key string, value1 string, value2 string) STORED BY " +
            "'org.apache.hcatalog.hbase.HBaseHCatStorageHandler'"
            + "TBLPROPERTIES ('hbase.columns.mapping'=':key,cf1:q1,cf1:q2')";
        cmdResponse = hcatDriver.run(tableQuery);
        assertEquals(0, cmdResponse.getResponseCode());
        revMap.clear();
        revMap.put("cf1", 3L);
        hbaseSnapshot = new TableSnapshot(fullyQualTableName, revMap, -1);
        inputInfo = InputJobInfo.create(databaseName, tableName, null);
        inputInfo.getProperties().setProperty(HBaseConstants.PROPERTY_TABLE_SNAPSHOT_KEY, "dummysnapshot");
        InitializeInput.setInput(job, inputInfo);
        modifiedInputInfo = job.getConfiguration().get(HCatConstants.HCAT_KEY_JOB_INFO);
        inputInfo = (InputJobInfo) HCatUtil.deserialize(modifiedInputInfo);
        hcatSnapshot = HBaseRevisionManagerUtil.convertSnapshot(hbaseSnapshot, inputInfo.getTableInfo());
        assertEquals(hcatSnapshot.getRevision("value1"), 3);
        assertEquals(hcatSnapshot.getRevision("value2"), 3);

        dropTable = "DROP TABLE " + fullyQualTableName;
        cmdResponse = hcatDriver.run(dropTable);
        assertEquals(0, cmdResponse.getResponseCode());

        String dropDatabase = "DROP DATABASE IF EXISTS " + databaseName + "CASCADE";
        cmdResponse = hcatDriver.run(dropDatabase);
        assertEquals(0, cmdResponse.getResponseCode());
    }

}