/*
 * 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.nifi.serialization.record;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.nifi.serialization.SimpleRecordSchema;
import org.junit.Assert;
import org.junit.Test;

public class TestMapRecord {

    @Test
    public void testDefaultValue() {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("noDefault", RecordFieldType.STRING.getDataType()));
        fields.add(new RecordField("defaultOfHello", RecordFieldType.STRING.getDataType(), "hello"));

        final RecordSchema schema = new SimpleRecordSchema(fields);
        final Map<String, Object> values = new HashMap<>();
        final Record record = new MapRecord(schema, values);

        assertNull(record.getValue("noDefault"));
        assertEquals("hello", record.getValue("defaultOfHello"));
    }

    @Test
    public void testDefaultValueInGivenField() {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("noDefault", RecordFieldType.STRING.getDataType()));
        fields.add(new RecordField("defaultOfHello", RecordFieldType.STRING.getDataType(), "hello"));

        final RecordSchema schema = new SimpleRecordSchema(fields);
        final Map<String, Object> values = new HashMap<>();
        final Record record = new MapRecord(schema, values);

        assertNull(record.getValue("noDefault"));
        assertEquals("hello", record.getValue("defaultOfHello"));

        final RecordField newField = new RecordField("noDefault", RecordFieldType.STRING.getDataType(), "new");
        assertEquals("new", record.getValue(newField));
    }

    @Test
    public void testIllegalDefaultValue() {
        new RecordField("hello", RecordFieldType.STRING.getDataType(), 84);
        new RecordField("hello", RecordFieldType.STRING.getDataType(), (Object) null);
        new RecordField("hello", RecordFieldType.INT.getDataType(), 84);
        new RecordField("hello", RecordFieldType.INT.getDataType(), (Object) null);

        try {
            new RecordField("hello", RecordFieldType.INT.getDataType(), "foo");
            Assert.fail("Was able to set a default value of \"foo\" for INT type");
        } catch (final IllegalArgumentException expected) {
            // expected
        }
    }

    private Set<String> set(final String... values) {
        final Set<String> set = new HashSet<>();
        for (final String value : values) {
            set.add(value);
        }
        return set;
    }

    @Test
    public void testAliasOneValue() {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("foo", RecordFieldType.STRING.getDataType(), null, set("bar", "baz")));

        final RecordSchema schema = new SimpleRecordSchema(fields);
        final Map<String, Object> values = new HashMap<>();
        values.put("bar", 1);

        final Record record = new MapRecord(schema, values);
        assertEquals(1, record.getValue("foo"));
        assertEquals(1, record.getValue("bar"));
        assertEquals(1, record.getValue("baz"));
    }

    @Test
    public void testAliasConflictingValues() {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("foo", RecordFieldType.STRING.getDataType(), null, set("bar", "baz")));

        final RecordSchema schema = new SimpleRecordSchema(fields);
        final Map<String, Object> values = new HashMap<>();
        values.put("bar", 1);
        values.put("foo", null);

        final Record record = new MapRecord(schema, values);
        assertEquals(1, record.getValue("foo"));
        assertEquals(1, record.getValue("bar"));
        assertEquals(1, record.getValue("baz"));
    }

    @Test
    public void testAliasConflictingAliasValues() {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("foo", RecordFieldType.STRING.getDataType(), null, set("bar", "baz")));

        final RecordSchema schema = new SimpleRecordSchema(fields);
        final Map<String, Object> values = new HashMap<>();
        values.put("baz", 1);
        values.put("bar", 33);

        final Record record = new MapRecord(schema, values);
        assertEquals(33, record.getValue("foo"));
        assertEquals(33, record.getValue("bar"));
        assertEquals(33, record.getValue("baz"));
    }

    @Test
    public void testAliasInGivenField() {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("foo", RecordFieldType.STRING.getDataType(), null, set("bar", "baz")));

        final RecordSchema schema = new SimpleRecordSchema(fields);
        final Map<String, Object> values = new HashMap<>();
        values.put("bar", 33);

        final Record record = new MapRecord(schema, values);
        assertEquals(33, record.getValue("foo"));
        assertEquals(33, record.getValue("bar"));
        assertEquals(33, record.getValue("baz"));

        final RecordField noAlias = new RecordField("hello", RecordFieldType.STRING.getDataType());
        assertNull(record.getValue(noAlias));

        final RecordField withAlias = new RecordField("hello", RecordFieldType.STRING.getDataType(), null, set("baz"));
        assertEquals(33, record.getValue(withAlias));
        assertEquals("33", record.getAsString(withAlias, withAlias.getDataType().getFormat()));
    }


    @Test
    public void testDefaultValueWithAliasValue() {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("foo", RecordFieldType.STRING.getDataType(), "hello", set("bar", "baz")));

        final RecordSchema schema = new SimpleRecordSchema(fields);
        final Map<String, Object> values = new HashMap<>();
        values.put("baz", 1);
        values.put("bar", 33);

        final Record record = new MapRecord(schema, values);
        assertEquals(33, record.getValue("foo"));
        assertEquals(33, record.getValue("bar"));
        assertEquals(33, record.getValue("baz"));
    }

    @Test
    public void testDefaultValueWithAliasesDefined() {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("foo", RecordFieldType.STRING.getDataType(), "hello", set("bar", "baz")));

        final RecordSchema schema = new SimpleRecordSchema(fields);
        final Map<String, Object> values = new HashMap<>();
        final Record record = new MapRecord(schema, values);
        assertEquals("hello", record.getValue("foo"));
        assertEquals("hello", record.getValue("bar"));
        assertEquals("hello", record.getValue("baz"));
    }
}