/*
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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
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*/
package org.apache.edgent.test.providers.dev;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.util.Collection;

import org.apache.edgent.execution.Job;
import org.apache.edgent.execution.Submitter;
import org.apache.edgent.graph.Graph;
import org.apache.edgent.graph.Vertex;
import org.apache.edgent.metrics.oplets.CounterOp;
import org.apache.edgent.oplet.Oplet;
import org.apache.edgent.providers.development.DevelopmentProvider;
import org.apache.edgent.streamscope.oplets.StreamScope;
import org.apache.edgent.test.topology.TopologyAbstractTest;
import org.apache.edgent.topology.TStream;
import org.apache.edgent.topology.Topology;
import org.apache.edgent.topology.tester.Condition;
import org.junit.Test;

public class DevelopmentProviderTest extends TopologyAbstractTest {

    @Override
    public DevelopmentProvider createTopologyProvider() {
        try {
            return new DevelopmentProvider();
        }
        catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
  
    @Override
    public Submitter<Topology, Job> createSubmitter() {
        return (DevelopmentProvider) getTopologyProvider();
    }

    // DevelopmentProvider inserts CounterOp metric oplets into the org.apache.edgent.graph
    @Test
    public void testMetricsEverywhere() throws Exception {

        Topology t = newTopology();
        TStream<String> s = t.strings("a", "b", "c");

        // Condition inserts a sink
        Condition<Long> tc = t.getTester().tupleCount(s, 3);

        Graph g = t.graph();
        Collection<Vertex<? extends Oplet<?, ?>, ?, ?>> vertices = g.getVertices();
        
        // Two vertices before submission
        assertEquals(2, vertices.size());

        complete(t, tc);
  
        // At least three vertices after submission
        // (provide may have added other oplets as well)
        Collection<Vertex<? extends Oplet<?, ?>, ?, ?>> verticesAfterSubmit = g.getVertices();
        assertTrue("size="+verticesAfterSubmit.size(), verticesAfterSubmit.size() >= 3);
        
        // There is exactly one vertex for a metric oplet
        int numOplets = 0;
        for (Vertex<? extends Oplet<?, ?>, ?, ?> v : verticesAfterSubmit) {
            Oplet<?,?> oplet = v.getInstance();
            if (oplet instanceof CounterOp) {
                numOplets++;
            }
        }
        assertEquals(1, numOplets);
    }

    // DevelopmentProvider inserts StreamScope oplets into the org.apache.edgent.graph
    @Test
    public void testStreamScopesEverywhere() throws Exception {

        Topology t = newTopology();
        TStream<String> s = t.strings("a", "b", "c");
        s = s.map(tuple -> tuple)
            .filter(tuple -> true);

        // Condition inserts a sink
        Condition<Long> tc = t.getTester().tupleCount(s, 3);

        Graph g = t.graph();
        Collection<Vertex<? extends Oplet<?, ?>, ?, ?>> vertices = g.getVertices();
        
        // Four vertices before submission
        assertEquals(4, vertices.size());

        complete(t, tc);
  
        // At least 4+3 vertices after submission
        // (provide may have added other oplets as well)
        Collection<Vertex<? extends Oplet<?, ?>, ?, ?>> verticesAfterSubmit = g.getVertices();
        assertTrue("size="+verticesAfterSubmit.size(), verticesAfterSubmit.size() >= 7);
        
        // There are exactly 3 vertex for a StreamScope oplet
        int numOplets = 0;
        for (Vertex<? extends Oplet<?, ?>, ?, ?> v : verticesAfterSubmit) {
            Oplet<?,?> oplet = v.getInstance();
            if (oplet instanceof StreamScope) {
                numOplets++;
            }
        }
        assertEquals(3, numOplets);
    }
}