/*
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 *  *
 *  * This program and the accompanying materials are made available under the
 *  * terms of the Apache License, Version 2.0 which is available at
 *  * https://www.apache.org/licenses/LICENSE-2.0.
 *  *
 *  *  See the NOTICE file distributed with this work for additional
 *  *  information regarding copyright ownership.
 *  * 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.
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 *  * SPDX-License-Identifier: Apache-2.0
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package org.datavec.api.records.reader.impl;

import org.datavec.api.records.reader.RecordReader;
import org.datavec.api.records.reader.impl.jackson.FieldSelection;
import org.datavec.api.records.reader.impl.jackson.JacksonLineRecordReader;
import org.datavec.api.records.reader.impl.jackson.JacksonLineSequenceRecordReader;
import org.datavec.api.split.CollectionInputSplit;
import org.datavec.api.split.FileSplit;
import org.datavec.api.writable.Text;
import org.datavec.api.writable.Writable;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import org.nd4j.common.io.ClassPathResource;
import org.nd4j.common.tests.BaseND4JTest;
import org.nd4j.common.tests.tags.TagNames;
import org.nd4j.shade.jackson.core.JsonFactory;
import org.nd4j.shade.jackson.databind.ObjectMapper;

import java.io.File;
import java.net.URI;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

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

@DisplayName("Jackson Line Record Reader Test")
@Tag(TagNames.JAVA_ONLY)
@Tag(TagNames.FILE_IO)
class JacksonLineRecordReaderTest extends BaseND4JTest {

    @TempDir
    public Path testDir;

    public JacksonLineRecordReaderTest() {
    }

    private static FieldSelection getFieldSelection() {
        return new FieldSelection.Builder().addField("value1").addField("value2").addField("value3").addField("value4").addField("value5").addField("value6").addField("value7").addField("value8").addField("value9").addField("value10").build();
    }

    @Test
    @DisplayName("Test Read JSON")
    void testReadJSON() throws Exception {
        RecordReader rr = new JacksonLineRecordReader(getFieldSelection(), new ObjectMapper(new JsonFactory()));
        rr.initialize(new FileSplit(new ClassPathResource("datavec-api/json/json_test_3.txt").getFile()));
        testJacksonRecordReader(rr);
    }

    private static void testJacksonRecordReader(RecordReader rr) {
        while (rr.hasNext()) {
            List<Writable> json0 = rr.next();
            // System.out.println(json0);
            assert (json0.size() > 0);
        }
    }

    @Test
    @DisplayName("Test Jackson Line Sequence Record Reader")
    void testJacksonLineSequenceRecordReader(@TempDir Path testDir) throws Exception {
        File dir = testDir.toFile();
        new ClassPathResource("datavec-api/JacksonLineSequenceRecordReaderTest/").copyDirectory(dir);
        FieldSelection f = new FieldSelection.Builder().addField("a").addField(new Text("MISSING_B"), "b").addField(new Text("MISSING_CX"), "c", "x").build();
        JacksonLineSequenceRecordReader rr = new JacksonLineSequenceRecordReader(f, new ObjectMapper(new JsonFactory()));
        File[] files = dir.listFiles();
        Arrays.sort(files);
        URI[] u = new URI[files.length];
        for (int i = 0; i < files.length; i++) {
            u[i] = files[i].toURI();
        }
        rr.initialize(new CollectionInputSplit(u));
        List<List<Writable>> expSeq0 = new ArrayList<>();
        expSeq0.add(Arrays.asList((Writable) new Text("aValue0"), new Text("bValue0"), new Text("cxValue0")));
        expSeq0.add(Arrays.asList((Writable) new Text("aValue1"), new Text("MISSING_B"), new Text("cxValue1")));
        expSeq0.add(Arrays.asList((Writable) new Text("aValue2"), new Text("bValue2"), new Text("MISSING_CX")));
        List<List<Writable>> expSeq1 = new ArrayList<>();
        expSeq1.add(Arrays.asList((Writable) new Text("aValue3"), new Text("bValue3"), new Text("cxValue3")));
        int count = 0;
        while (rr.hasNext()) {
            List<List<Writable>> next = rr.sequenceRecord();
            if (count++ == 0) {
                assertEquals(expSeq0, next);
            } else {
                assertEquals(expSeq1, next);
            }
        }
        assertEquals(2, count);
    }
}
