/**
 * 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.apex.malhar.lib.appdata.schemas;

import java.util.List;
import java.util.Map;

import org.codehaus.jettison.json.JSONArray;
import org.codehaus.jettison.json.JSONObject;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.apex.malhar.lib.appdata.gpo.GPOMutable;
import org.apache.apex.malhar.lib.appdata.query.serde.DataResultSnapshotSerializer;

import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;

public class DataResultSnapshotSerializerTest
{
  private static final Logger logger = LoggerFactory.getLogger(DataResultSnapshotSerializerTest.class);

  @Test
  public void simpleResultSerializerTest() throws Exception
  {
    List<GPOMutable> dataValues = createValues();
    DataQuerySnapshot gQuery = new DataQuerySnapshot("1", new Fields(Sets.newHashSet("a", "b")));

    DataResultSnapshot result = new DataResultSnapshot(gQuery, dataValues);

    DataResultSnapshotSerializer serializer = new DataResultSnapshotSerializer();

    final String expectedJSONResult = "{\"id\":\"1\",\"type\":\"dataResult\",\"data\":[{\"b\":\"hello\",\"a\":\"1\"}," +
        "{\"b\":\"world\",\"a\":\"2\"}]}";
    String resultJSON = serializer.serialize(result, new ResultFormatter());

    JSONObject jo = new JSONObject(expectedJSONResult);
    JSONArray data = jo.getJSONArray("data");
    JSONObject jo1 = data.getJSONObject(0);
    JSONObject jo2 = data.getJSONObject(1);

    JSONObject rjo = new JSONObject(resultJSON);
    JSONArray rdata = rjo.getJSONArray("data");
    JSONObject rjo1 = rdata.getJSONObject(0);
    JSONObject rjo2 = rdata.getJSONObject(1);

    Assert.assertFalse(rjo.has(Result.FIELD_COUNTDOWN));

    Assert.assertEquals("The json doesn't match.", jo1.get("a"), rjo1.get("a"));
    Assert.assertEquals("The json doesn't match.", jo1.get("b"), rjo1.get("b"));
    Assert.assertEquals("The json doesn't match.", jo2.get("a"), rjo2.get("a"));
    Assert.assertEquals("The json doesn't match.", jo2.get("b"), rjo2.get("b"));
    Assert.assertEquals("The type doesn't match.", DataResultSnapshot.TYPE, jo.get(DataResultSnapshot.FIELD_TYPE));
  }

  @Test
  public void simpleCountdownTest() throws Exception
  {
    List<GPOMutable> dataValues = createValues();
    DataQuerySnapshot gQuery = new DataQuerySnapshot("1", new Fields(Sets.newHashSet("a", "b")));

    DataResultSnapshot result = new DataResultSnapshot(gQuery, dataValues, 2);

    DataResultSnapshotSerializer serializer = new DataResultSnapshotSerializer();
    String resultJSON = serializer.serialize(result, new ResultFormatter());

    JSONObject rjo = new JSONObject(resultJSON);

    long countdown = rjo.getLong(Result.FIELD_COUNTDOWN);

    Assert.assertEquals(2, countdown);
  }

  private List<GPOMutable> createValues()
  {
    Map<String, Type> fieldToTypeA = Maps.newHashMap();
    fieldToTypeA.put("a", Type.LONG);
    fieldToTypeA.put("b", Type.STRING);

    FieldsDescriptor fdA = new FieldsDescriptor(fieldToTypeA);

    GPOMutable gpoA = new GPOMutable(fdA);
    gpoA.setField("a", 1L);
    gpoA.setField("b", "hello");

    FieldsDescriptor fdB = new FieldsDescriptor(fieldToTypeA);

    GPOMutable gpoB = new GPOMutable(fdB);
    gpoB.setField("a", 2L);
    gpoB.setField("b", "world");

    List<GPOMutable> values = Lists.newArrayList();
    values.add(gpoA);
    values.add(gpoB);

    return values;
  }
}
