/**
 * 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.pig;

import com.google.common.collect.Lists;
import junit.framework.Assert;
import org.apache.hcatalog.common.HCatConstants;
import org.apache.hcatalog.data.schema.HCatFieldSchema;
import org.apache.hcatalog.data.schema.HCatSchema;
import org.apache.pig.ResourceSchema;
import org.apache.pig.ResourceSchema.ResourceFieldSchema;
import org.apache.pig.data.DataType;
import org.apache.pig.impl.util.UDFContext;
import org.junit.Test;

public class TestPigHCatUtil {

    @Test
    public void testGetBagSubSchema() throws Exception {

        // Define the expected schema.
        ResourceFieldSchema[] bagSubFieldSchemas = new ResourceFieldSchema[1];
        bagSubFieldSchemas[0] = new ResourceFieldSchema().setName("innertuple")
            .setDescription("The tuple in the bag").setType(DataType.TUPLE);

        ResourceFieldSchema[] innerTupleFieldSchemas = new ResourceFieldSchema[1];
        innerTupleFieldSchemas[0] =
            new ResourceFieldSchema().setName("innerfield").setType(DataType.CHARARRAY);

        bagSubFieldSchemas[0].setSchema(new ResourceSchema().setFields(innerTupleFieldSchemas));
        ResourceSchema expected = new ResourceSchema().setFields(bagSubFieldSchemas);

        // Get the actual converted schema.
        HCatSchema hCatSchema = new HCatSchema(Lists.newArrayList(
            new HCatFieldSchema("innerLlama", HCatFieldSchema.Type.STRING, null)));
        HCatFieldSchema hCatFieldSchema =
            new HCatFieldSchema("llama", HCatFieldSchema.Type.ARRAY, hCatSchema, null);
        ResourceSchema actual = PigHCatUtil.getBagSubSchema(hCatFieldSchema);

        Assert.assertEquals(expected.toString(), actual.toString());
    }

    @Test
    public void testGetBagSubSchemaConfigured() throws Exception {

        // NOTE: pig-0.8 sets client system properties by actually getting the client
        // system properties. Starting in pig-0.9 you must pass the properties in.
        // When updating our pig dependency this will need updated.
        System.setProperty(HCatConstants.HCAT_PIG_INNER_TUPLE_NAME, "t");
        System.setProperty(HCatConstants.HCAT_PIG_INNER_FIELD_NAME, "FIELDNAME_tuple");
        UDFContext.getUDFContext().setClientSystemProps(System.getProperties());

        // Define the expected schema.
        ResourceFieldSchema[] bagSubFieldSchemas = new ResourceFieldSchema[1];
        bagSubFieldSchemas[0] = new ResourceFieldSchema().setName("t")
            .setDescription("The tuple in the bag").setType(DataType.TUPLE);

        ResourceFieldSchema[] innerTupleFieldSchemas = new ResourceFieldSchema[1];
        innerTupleFieldSchemas[0] =
            new ResourceFieldSchema().setName("llama_tuple").setType(DataType.CHARARRAY);

        bagSubFieldSchemas[0].setSchema(new ResourceSchema().setFields(innerTupleFieldSchemas));
        ResourceSchema expected = new ResourceSchema().setFields(bagSubFieldSchemas);

        // Get the actual converted schema.
        HCatSchema actualHCatSchema = new HCatSchema(Lists.newArrayList(
            new HCatFieldSchema("innerLlama", HCatFieldSchema.Type.STRING, null)));
        HCatFieldSchema actualHCatFieldSchema =
            new HCatFieldSchema("llama", HCatFieldSchema.Type.ARRAY, actualHCatSchema, null);
        ResourceSchema actual = PigHCatUtil.getBagSubSchema(actualHCatFieldSchema);

        Assert.assertEquals(expected.toString(), actual.toString());
    }
}