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package org.umlg.sqlg.test;

import org.apache.tinkerpop.gremlin.AbstractGremlinTest;
import org.apache.tinkerpop.gremlin.process.traversal.Traversal;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.process.traversal.step.util.MapHelper;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.io.GraphReader;
import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoIo;
import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoReader;
import org.junit.Assert;
import org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.both;
import static org.junit.Assert.assertEquals;

/**
 * Date: 2014/07/13
 * Time: 6:32 PM
 */
public class TinkerpopTest extends BaseTest {

    private static final String partition = "gremlin.partitionGraphStrategy.partition";

    @Test
    public void testTail() throws IOException {
        Graph graph = this.sqlgGraph;
        final GraphReader reader = GryoReader.build()
                .mapper(graph.io(GryoIo.build()).mapper().create())
                .create();
        try (final InputStream stream = AbstractGremlinTest.class.getResourceAsStream("/tinkerpop-modern.kryo")) {
            reader.readGraph(stream, graph);
        }
        assertModernGraph(graph, true, false);
        GraphTraversalSource g = graph.traversal();
        int tail = 0;
        for (int i = 1; i < 72; i++) {
            tail = i;
            List vertices = g.V().repeat(both()).times(3).tail(tail).toList();
            if (tail != vertices.size()) {
                System.out.println("expected " + tail + " found " + vertices.size());
            }
        }
    }

//    @Test
    public void g_V_chooseXlabel_eq_person__unionX__out_lang__out_nameX__in_labelX() throws IOException {
        Graph graph = this.sqlgGraph;
        final GraphReader reader = GryoReader.build()
                .mapper(graph.io(GryoIo.build()).mapper().create())
                .create();
        try (final InputStream stream = AbstractGremlinTest.class.getResourceAsStream("/tinkerpop-modern.kryo")) {
            reader.readGraph(stream, graph);
        }
        assertModernGraph(graph, true, false);
        GraphTraversalSource g = graph.traversal();
        List traversala2 =  g.V().hasId(convertToVertexId("marko")).toList();
        Assert.assertEquals(1, traversala2.size());
        Assert.assertEquals(convertToVertex(graph, "marko"), traversala2.get(0));

    }

    public static  void checkResults(final Map expectedResults, final Traversal traversal) {
        final List list = new ArrayList<>();
        expectedResults.forEach((k, v) -> {
            for (int i = 0; i < v; i++) {
                list.add(k);
            }
        });
        checkResults(list, traversal);
    }

    public static  void checkResults(final List expectedResults, final Traversal traversal) {
        final List results = traversal.toList();
        Assert.assertFalse(traversal.hasNext());
        if(expectedResults.size() != results.size()) {
            System.err.println("Expected results: " + expectedResults);
            System.err.println("Actual results:   " + results);
            assertEquals("Checking result size", expectedResults.size(), results.size());
        }

        for (T t : results) {
            if (t instanceof Map) {
                Assert.assertTrue("Checking map result existence: " + t, expectedResults.stream().filter(e -> e instanceof Map).filter(e -> checkMap((Map) e, (Map) t)).findAny().isPresent());
            } else {
                Assert.assertTrue("Checking result existence: " + t, expectedResults.contains(t));
            }
        }
        final Map expectedResultsCount = new HashMap<>();
        final Map resultsCount = new HashMap<>();
        assertEquals("Checking indexing is equivalent", expectedResultsCount.size(), resultsCount.size());
        expectedResults.forEach(t -> MapHelper.incr(expectedResultsCount, t, 1L));
        results.forEach(t -> MapHelper.incr(resultsCount, t, 1L));
        expectedResultsCount.forEach((k, v) -> assertEquals("Checking result group counts", v, resultsCount.get(k)));
        Assert.assertFalse(traversal.hasNext());
    }

    public static  boolean checkMap(final Map expectedMap, final Map actualMap) {
        final List> actualList = actualMap.entrySet().stream().sorted((a, b) -> a.getKey().toString().compareTo(b.getKey().toString())).collect(Collectors.toList());
        final List> expectedList = expectedMap.entrySet().stream().sorted((a, b) -> a.getKey().toString().compareTo(b.getKey().toString())).collect(Collectors.toList());

        if (expectedList.size() > actualList.size()) {
            return false;
        } else if (actualList.size() > expectedList.size()) {
            return false;
        }

        for (int i = 0; i < actualList.size(); i++) {
            if (!actualList.get(i).getKey().equals(expectedList.get(i).getKey())) {
                return false;
            }
            if (!actualList.get(i).getValue().equals(expectedList.get(i).getValue())) {
                return false;
            }
        }
        return true;
    }

}