/*
 * 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
 *
 *   https://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.commons.csv.issues;

import static org.junit.jupiter.api.Assertions.assertEquals;

import java.io.IOException;
import java.io.StringReader;
import java.util.Iterator;

import org.apache.commons.csv.CSVFormat;
import org.apache.commons.csv.CSVParser;
import org.apache.commons.csv.CSVRecord;
import org.junit.jupiter.api.Test;

/**
 * Tests [CSV-265] {@link CSVRecord#getCharacterPosition()} returns the correct position after encountering a comment.
 */
class JiraCsv265Test {

    @Test
    void testCharacterPositionWithComments() throws IOException {
        // @formatter:off
        final String csv =
                "# Comment1\n" +
                "Header1,Header2\n" +
                "# Comment2\n" +
                "Value1,Value2\n" +
                "# Comment3\n" +
                "Value3,Value4\n" +
                "# Comment4\n";
        final CSVFormat csvFormat = CSVFormat.DEFAULT.builder()
            .setCommentMarker('#')
            .setHeader()
            .setSkipHeaderRecord(true)
            .get();
        // @formatter:on
        try (CSVParser parser = csvFormat.parse(new StringReader(csv))) {
            final Iterator<CSVRecord> itr = parser.iterator();
            final CSVRecord record1 = itr.next();
            assertEquals(csv.indexOf("# Comment2"), record1.getCharacterPosition());
            final CSVRecord record2 = itr.next();
            assertEquals(csv.indexOf("# Comment3"), record2.getCharacterPosition());
        }
    }

    @Test
    void testCharacterPositionWithCommentsSpanningMultipleLines() throws IOException {
        // @formatter:off
        final String csv =
                "# Comment1\n" +
                "# Comment2\n" +
                "Header1,Header2\n" +
                "# Comment3\n" +
                "# Comment4\n" +
                "Value1,Value2\n" +
                "# Comment5\n" +
                "# Comment6\n" +
                "Value3,Value4";
        final CSVFormat csvFormat = CSVFormat.DEFAULT.builder()
            .setCommentMarker('#')
            .setHeader()
            .setSkipHeaderRecord(true)
            .get();
        // @formatter:on
        try (CSVParser parser = csvFormat.parse(new StringReader(csv))) {
            final Iterator<CSVRecord> itr = parser.iterator();
            final CSVRecord record1 = itr.next();
            assertEquals(csv.indexOf("# Comment3"), record1.getCharacterPosition());
            final CSVRecord record2 = itr.next();
            assertEquals(csv.indexOf("# Comment5"), record2.getCharacterPosition());
        }
    }

}
