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 * ownership. Elasticsearch 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
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package org.elasticsearch.ingest.common;

import org.elasticsearch.ingest.IngestDocument;
import org.elasticsearch.ingest.Processor;
import org.elasticsearch.ingest.RandomDocumentPicks;
import org.elasticsearch.test.ESTestCase;

import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static org.elasticsearch.ingest.IngestDocumentMatcher.assertIngestDocument;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.equalTo;

public class SplitProcessorTests extends ESTestCase {

    public void testSplit() throws Exception {
        IngestDocument ingestDocument = RandomDocumentPicks.randomIngestDocument(random());
        String fieldName = RandomDocumentPicks.addRandomField(random(), ingestDocument, "127.0.0.1");
        Processor processor = new SplitProcessor(randomAlphaOfLength(10), fieldName, "\\.", false);
        processor.execute(ingestDocument);
        assertThat(ingestDocument.getFieldValue(fieldName, List.class), equalTo(Arrays.asList("127", "0", "0", "1")));
    }

    public void testSplitFieldNotFound() throws Exception {
        IngestDocument ingestDocument = RandomDocumentPicks.randomIngestDocument(random(), new HashMap<>());
        String fieldName = RandomDocumentPicks.randomFieldName(random());
        Processor processor = new SplitProcessor(randomAlphaOfLength(10), fieldName, "\\.", false);
        try {
            processor.execute(ingestDocument);
            fail("split processor should have failed");
        } catch (IllegalArgumentException e) {
            assertThat(e.getMessage(), containsString("not present as part of path [" + fieldName + "]"));
        }
    }

    public void testSplitNullValue() throws Exception {
        IngestDocument ingestDocument = RandomDocumentPicks.randomIngestDocument(random(),
            Collections.singletonMap("field", null));
        Processor processor = new SplitProcessor(randomAlphaOfLength(10), "field", "\\.", false);
        try {
            processor.execute(ingestDocument);
            fail("split processor should have failed");
        } catch (IllegalArgumentException e) {
            assertThat(e.getMessage(), equalTo("field [field] is null, cannot split."));
        }
    }

    public void testSplitNullValueWithIgnoreMissing() throws Exception {
        String fieldName = RandomDocumentPicks.randomFieldName(random());
        IngestDocument originalIngestDocument = RandomDocumentPicks.randomIngestDocument(random(),
            Collections.singletonMap(fieldName, null));
        IngestDocument ingestDocument = new IngestDocument(originalIngestDocument);
        Processor processor = new SplitProcessor(randomAlphaOfLength(10), fieldName, "\\.", true);
        processor.execute(ingestDocument);
        assertIngestDocument(originalIngestDocument, ingestDocument);
    }

    public void testSplitNonExistentWithIgnoreMissing() throws Exception {
        IngestDocument originalIngestDocument = RandomDocumentPicks.randomIngestDocument(random(), Collections.emptyMap());
        IngestDocument ingestDocument = new IngestDocument(originalIngestDocument);
        Processor processor = new SplitProcessor(randomAlphaOfLength(10), "field", "\\.", true);
        processor.execute(ingestDocument);
        assertIngestDocument(originalIngestDocument, ingestDocument);
    }

    public void testSplitNonStringValue() throws Exception {
        IngestDocument ingestDocument = RandomDocumentPicks.randomIngestDocument(random(), new HashMap<>());
        String fieldName = RandomDocumentPicks.randomFieldName(random());
        ingestDocument.setFieldValue(fieldName, randomInt());
        Processor processor = new SplitProcessor(randomAlphaOfLength(10), fieldName, "\\.", false);
        try {
            processor.execute(ingestDocument);
            fail("split processor should have failed");
        } catch (IllegalArgumentException e) {
            assertThat(e.getMessage(), equalTo("field [" + fieldName + "] of type [java.lang.Integer] cannot be cast " +
                    "to [java.lang.String]"));
        }
    }

    public void testSplitAppendable() throws Exception {
        Map<String, Object> splitConfig = new HashMap<>();
        splitConfig.put("field", "flags");
        splitConfig.put("separator", "\\|");
        Processor splitProcessor = (new SplitProcessor.Factory()).create(null, null, splitConfig);
        Map<String, Object> source = new HashMap<>();
        source.put("flags", "new|hot|super|fun|interesting");
        IngestDocument ingestDocument = new IngestDocument(source, new HashMap<>());
        splitProcessor.execute(ingestDocument);
        @SuppressWarnings("unchecked")
        List<String> flags = (List<String>)ingestDocument.getFieldValue("flags", List.class);
        assertThat(flags, equalTo(Arrays.asList("new", "hot", "super", "fun", "interesting")));
        ingestDocument.appendFieldValue("flags", "additional_flag");
        assertThat(ingestDocument.getFieldValue("flags", List.class), equalTo(Arrays.asList("new", "hot", "super",
                "fun", "interesting", "additional_flag")));
    }
}