/*
 * 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.json;

import org.apache.commons.lang3.StringUtils;
import org.apache.nifi.logging.ComponentLog;
import org.apache.nifi.record.NullSuppression;
import org.apache.nifi.schema.access.SchemaNameAsAttribute;
import org.apache.nifi.serialization.SimpleRecordSchema;
import org.apache.nifi.serialization.record.DataType;
import org.apache.nifi.serialization.record.MapRecord;
import org.apache.nifi.serialization.record.Record;
import org.apache.nifi.serialization.record.RecordField;
import org.apache.nifi.serialization.record.RecordFieldType;
import org.apache.nifi.serialization.record.RecordSchema;
import org.apache.nifi.serialization.record.RecordSet;
import org.apache.nifi.serialization.record.SerializedForm;
import org.junit.Test;
import org.mockito.Mockito;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.TimeZone;

import static org.junit.Assert.assertEquals;

public class TestWriteJsonResult {

    @Test
    public void testDataTypes() throws IOException, ParseException {
        final List<RecordField> fields = new ArrayList<>();
        for (final RecordFieldType fieldType : RecordFieldType.values()) {
            if (fieldType == RecordFieldType.CHOICE) {
                final List<DataType> possibleTypes = new ArrayList<>();
                possibleTypes.add(RecordFieldType.INT.getDataType());
                possibleTypes.add(RecordFieldType.LONG.getDataType());

                fields.add(new RecordField(fieldType.name().toLowerCase(), fieldType.getChoiceDataType(possibleTypes)));
            } else if (fieldType == RecordFieldType.MAP) {
                fields.add(new RecordField(fieldType.name().toLowerCase(), fieldType.getMapDataType(RecordFieldType.INT.getDataType())));
            } else {
                fields.add(new RecordField(fieldType.name().toLowerCase(), fieldType.getDataType()));
            }
        }
        final RecordSchema schema = new SimpleRecordSchema(fields);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        final DateFormat df = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss.SSS");
        df.setTimeZone(TimeZone.getTimeZone("gmt"));
        final long time = df.parse("2017/01/01 17:00:00.000").getTime();

        final Map<String, Object> map = new LinkedHashMap<>();
        map.put("height", 48);
        map.put("width", 96);

        final Map<String, Object> valueMap = new LinkedHashMap<>();
        valueMap.put("string", "string");
        valueMap.put("boolean", true);
        valueMap.put("byte", (byte) 1);
        valueMap.put("char", 'c');
        valueMap.put("short", (short) 8);
        valueMap.put("int", 9);
        valueMap.put("bigint", BigInteger.valueOf(8L));
        valueMap.put("long", 8L);
        valueMap.put("float", 8.0F);
        valueMap.put("double", 8.0D);
        valueMap.put("decimal", BigDecimal.valueOf(8.1D));
        valueMap.put("date", new Date(time));
        valueMap.put("time", new Time(time));
        valueMap.put("timestamp", new Timestamp(time));
        valueMap.put("record", null);
        valueMap.put("array", null);
        valueMap.put("enum", null);
        valueMap.put("choice", 48L);
        valueMap.put("map", map);

        final Record record = new MapRecord(schema, valueMap);
        final RecordSet rs = RecordSet.of(schema, record);

        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, true,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, RecordFieldType.DATE.getDefaultFormat(),
                RecordFieldType.TIME.getDefaultFormat(), RecordFieldType.TIMESTAMP.getDefaultFormat())) {

            writer.write(rs);
        }

        final String output = baos.toString("UTF-8");

        final String expected = new String(Files.readAllBytes(Paths.get("src/test/resources/json/output/dataTypes.json")));
        assertEquals(StringUtils.deleteWhitespace(expected), StringUtils.deleteWhitespace(output));
    }


    @Test
    public void testWriteSerializedForm() throws IOException {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("name", RecordFieldType.STRING.getDataType()));
        fields.add(new RecordField("age", RecordFieldType.INT.getDataType()));
        final RecordSchema schema = new SimpleRecordSchema(fields);

        final Map<String, Object> values1 = new HashMap<>();
        values1.put("name", "John Doe");
        values1.put("age", 42);
        final String serialized1 = "{ \"name\": \"John Doe\",    \"age\": 42 }";
        final SerializedForm serializedForm1 = SerializedForm.of(serialized1, "application/json");
        final Record record1 = new MapRecord(schema, values1, serializedForm1);

        final Map<String, Object> values2 = new HashMap<>();
        values2.put("name", "Jane Doe");
        values2.put("age", 43);
        final String serialized2 = "{ \"name\": \"Jane Doe\",    \"age\": 43 }";
        final SerializedForm serializedForm2 = SerializedForm.of(serialized2, "application/json");
        final Record record2 = new MapRecord(schema, values1, serializedForm2);

        final RecordSet rs = RecordSet.of(schema, record1, record2);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, true,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, RecordFieldType.DATE.getDefaultFormat(),
                RecordFieldType.TIME.getDefaultFormat(), RecordFieldType.TIMESTAMP.getDefaultFormat())) {

            writer.write(rs);
        }

        final byte[] data = baos.toByteArray();

        final String expected = "[ " + serialized1 + ", " + serialized2 + " ]";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }

    @Test
    public void testTimestampWithNullFormat() throws IOException {
        final Map<String, Object> values = new HashMap<>();
        values.put("timestamp", new java.sql.Timestamp(37293723L));
        values.put("time", new java.sql.Time(37293723L));
        values.put("date", new java.sql.Date(37293723L));

        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("timestamp", RecordFieldType.TIMESTAMP.getDataType()));
        fields.add(new RecordField("time", RecordFieldType.TIME.getDataType()));
        fields.add(new RecordField("date", RecordFieldType.DATE.getDataType()));

        final RecordSchema schema = new SimpleRecordSchema(fields);

        final Record record = new MapRecord(schema, values);
        final RecordSet rs = RecordSet.of(schema, record);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.write(rs);
        }

        final byte[] data = baos.toByteArray();

        final String expected = "[{\"timestamp\":37293723,\"time\":37293723,\"date\":37293723}]";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }

    @Test
    public void testExtraFieldInWriteRecord() throws IOException {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("id", RecordFieldType.STRING.getDataType()));
        final RecordSchema schema = new SimpleRecordSchema(fields);

        final Map<String, Object> values = new HashMap<>();
        values.put("id", "1");
        values.put("name", "John");
        final Record record = new MapRecord(schema, values);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.writeRecord(record);
            writer.finishRecordSet();
        }

        final byte[] data = baos.toByteArray();

        final String expected = "[{\"id\":\"1\"}]";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }

    @Test
    public void testExtraFieldInWriteRawRecord() throws IOException {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("id", RecordFieldType.STRING.getDataType()));
        final RecordSchema schema = new SimpleRecordSchema(fields);

        final Map<String, Object> values = new LinkedHashMap<>();
        values.put("id", "1");
        values.put("name", "John");
        final Record record = new MapRecord(schema, values);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.writeRawRecord(record);
            writer.finishRecordSet();
        }

        final byte[] data = baos.toByteArray();

        final String expected = "[{\"id\":\"1\",\"name\":\"John\"}]";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }

    @Test
    public void testMissingFieldInWriteRecord() throws IOException {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("id", RecordFieldType.STRING.getDataType()));
        fields.add(new RecordField("name", RecordFieldType.STRING.getDataType()));
        final RecordSchema schema = new SimpleRecordSchema(fields);

        final Map<String, Object> values = new LinkedHashMap<>();
        values.put("id", "1");
        final Record record = new MapRecord(schema, values);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.writeRecord(record);
            writer.finishRecordSet();
        }

        final byte[] data = baos.toByteArray();

        final String expected = "[{\"id\":\"1\",\"name\":null}]";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }

    @Test
    public void testMissingFieldInWriteRawRecord() throws IOException {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("id", RecordFieldType.STRING.getDataType()));
        fields.add(new RecordField("name", RecordFieldType.STRING.getDataType()));
        final RecordSchema schema = new SimpleRecordSchema(fields);

        final Map<String, Object> values = new LinkedHashMap<>();
        values.put("id", "1");
        final Record record = new MapRecord(schema, values);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.writeRawRecord(record);
            writer.finishRecordSet();
        }

        final byte[] data = baos.toByteArray();

        final String expected = "[{\"id\":\"1\"}]";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }

    @Test
    public void testMissingAndExtraFieldInWriteRecord() throws IOException {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("id", RecordFieldType.STRING.getDataType()));
        fields.add(new RecordField("name", RecordFieldType.STRING.getDataType()));
        final RecordSchema schema = new SimpleRecordSchema(fields);

        final Map<String, Object> values = new LinkedHashMap<>();
        values.put("id", "1");
        values.put("dob", "1/1/1970");
        final Record record = new MapRecord(schema, values);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.writeRecord(record);
            writer.finishRecordSet();
        }

        final byte[] data = baos.toByteArray();

        final String expected = "[{\"id\":\"1\",\"name\":null}]";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }

    @Test
    public void testMissingAndExtraFieldInWriteRawRecord() throws IOException {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("id", RecordFieldType.STRING.getDataType()));
        fields.add(new RecordField("name", RecordFieldType.STRING.getDataType()));
        final RecordSchema schema = new SimpleRecordSchema(fields);

        final Map<String, Object> values = new LinkedHashMap<>();
        values.put("id", "1");
        values.put("dob", "1/1/1970");
        final Record record = new MapRecord(schema, values);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.writeRawRecord(record);
            writer.finishRecordSet();
        }

        final byte[] data = baos.toByteArray();

        final String expected = "[{\"id\":\"1\",\"dob\":\"1/1/1970\"}]";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }

    @Test
    public void testNullSuppression() throws IOException {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("id", RecordFieldType.STRING.getDataType()));
        fields.add(new RecordField("name", RecordFieldType.STRING.getDataType()));
        final RecordSchema schema = new SimpleRecordSchema(fields);

        final Map<String, Object> values = new LinkedHashMap<>();
        values.put("id", "1");
        final Record recordWithMissingName = new MapRecord(schema, values);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.write(recordWithMissingName);
            writer.finishRecordSet();
        }

        assertEquals("[{\"id\":\"1\",\"name\":null}]", new String(baos.toByteArray(), StandardCharsets.UTF_8));

        baos.reset();
        try (
            final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                    NullSuppression.ALWAYS_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.write(recordWithMissingName);
            writer.finishRecordSet();
        }

        assertEquals("[{\"id\":\"1\"}]", new String(baos.toByteArray(), StandardCharsets.UTF_8));

        baos.reset();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.SUPPRESS_MISSING, OutputGrouping.OUTPUT_ARRAY, null, null,
            null)) {
            writer.beginRecordSet();
            writer.write(recordWithMissingName);
            writer.finishRecordSet();
        }

        assertEquals("[{\"id\":\"1\"}]", new String(baos.toByteArray(), StandardCharsets.UTF_8));

        // set an explicit null value
        values.put("name", null);
        final Record recordWithNullValue = new MapRecord(schema, values);

        baos.reset();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.write(recordWithNullValue);
            writer.finishRecordSet();
        }

        assertEquals("[{\"id\":\"1\",\"name\":null}]", new String(baos.toByteArray(), StandardCharsets.UTF_8));

        baos.reset();
        try (
            final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                    NullSuppression.ALWAYS_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.write(recordWithNullValue);
            writer.finishRecordSet();
        }

        assertEquals("[{\"id\":\"1\"}]", new String(baos.toByteArray(), StandardCharsets.UTF_8));

        baos.reset();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.SUPPRESS_MISSING, OutputGrouping.OUTPUT_ARRAY, null, null,
            null)) {
            writer.beginRecordSet();
            writer.write(recordWithNullValue);
            writer.finishRecordSet();
        }

        assertEquals("[{\"id\":\"1\",\"name\":null}]", new String(baos.toByteArray(), StandardCharsets.UTF_8));

    }

    @Test
    public void testOnelineOutput() throws IOException {
        final Map<String, Object> values1 = new HashMap<>();
        values1.put("timestamp", new java.sql.Timestamp(37293723L));
        values1.put("time", new java.sql.Time(37293723L));
        values1.put("date", new java.sql.Date(37293723L));

        final List<RecordField> fields1 = new ArrayList<>();
        fields1.add(new RecordField("timestamp", RecordFieldType.TIMESTAMP.getDataType()));
        fields1.add(new RecordField("time", RecordFieldType.TIME.getDataType()));
        fields1.add(new RecordField("date", RecordFieldType.DATE.getDataType()));

        final RecordSchema schema = new SimpleRecordSchema(fields1);

        final Record record1 = new MapRecord(schema, values1);

        final Map<String, Object> values2 = new HashMap<>();
        values2.put("timestamp", new java.sql.Timestamp(37293999L));
        values2.put("time", new java.sql.Time(37293999L));
        values2.put("date", new java.sql.Date(37293999L));


        final Record record2 = new MapRecord(schema, values2);

        final RecordSet rs = RecordSet.of(schema, record1, record2);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ONELINE, null, null, null)) {
            writer.write(rs);
        }

        final byte[] data = baos.toByteArray();

        final String expected = "{\"timestamp\":37293723,\"time\":37293723,\"date\":37293723}\n{\"timestamp\":37293999,\"time\":37293999,\"date\":37293999}";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }

    @Test
    public void testChoiceArray() throws IOException {
        final List<RecordField> fields = new ArrayList<>();
        fields.add(new RecordField("path", RecordFieldType.CHOICE.getChoiceDataType(RecordFieldType.ARRAY.getArrayDataType(RecordFieldType.STRING.getDataType()))));
        final RecordSchema schema = new SimpleRecordSchema(fields);

        Object[] paths = new Object[1];
        paths[0] = "10.2.1.3";

        final Map<String, Object> values = new HashMap<>();
        values.put("path", paths);
        final Record record = new MapRecord(schema, values);

        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try (final WriteJsonResult writer = new WriteJsonResult(Mockito.mock(ComponentLog.class), schema, new SchemaNameAsAttribute(), baos, false,
                NullSuppression.NEVER_SUPPRESS, OutputGrouping.OUTPUT_ARRAY, null, null, null)) {
            writer.beginRecordSet();
            writer.writeRecord(record);
            writer.finishRecordSet();
        }

        final byte[] data = baos.toByteArray();

        final String expected = "[{\"path\":[\"10.2.1.3\"]}]";

        final String output = new String(data, StandardCharsets.UTF_8);
        assertEquals(expected, output);
    }
}