/*
 * 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
 *
 * 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
 * under the License.
 */
package org.apache.tinkerpop.gremlin.process.traversal.strategy.verification;

import org.apache.tinkerpop.gremlin.LoadGraphWith;
import org.apache.tinkerpop.gremlin.process.AbstractGremlinProcessTest;
import org.apache.tinkerpop.gremlin.process.traversal.TraversalEngine;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
import org.junit.Test;

import static org.apache.tinkerpop.gremlin.LoadGraphWith.GraphData.MODERN;
import static org.apache.tinkerpop.gremlin.process.traversal.NumberHelper.mul;
import static org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__.*;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

/**
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 */
public abstract class ComputerVerificationStrategyProcessTest extends AbstractGremlinProcessTest {

    public static class StandardTraversals extends ComputerVerificationStrategyProcessTest {
        @Test
        @LoadGraphWith(MODERN)
        public void shouldAllowNestedGlobalTraversalToHaveBarriers() {
            try {
                g.V().values("age").union(max(), min(), sum()).iterate();
            } catch (IllegalStateException e) {
                fail("Nested global traversals can have barrier steps on STANDARD:" + e.getMessage());
            }
        }

        @Test
        @LoadGraphWith(MODERN)
        public void shouldAllowMidTraversalBarriersOnComputer() {
            try {
                g.V().count().sum().iterate();
            } catch (IllegalStateException e) {
                fail("Mid-traversal barrier steps are OK on STANDARD: " + e.getMessage());
            }
        }

        @Test
        @LoadGraphWith(MODERN)
        public void shouldAllowLocalTraversalsToLeaveTheStarGraphOnComputer() {
            try {
                g.V().local(out().out()).iterate();
            } catch (IllegalStateException e) {
                fail("Local traversals leaving the star-graph are OK on STANDARD: " + e.getMessage());
            }
        }
    }

    public static class ComputerTraversals extends ComputerVerificationStrategyProcessTest {

        @Test
        @LoadGraphWith(MODERN)
        public void shouldNotAllowNestedGlobalTraversalToHaveBarriers() {
            try {
                final GraphTraversal t = g.V().values("age").union(max(), min(), sum()).iterate();
                fail("Nested global traversals should not be allowed to contain barriers (COMPUTER): " + t);
            } catch (IllegalStateException e) {
               assertTrue(true);
            }
        }

        @Test
        @LoadGraphWith(MODERN)
        public void shouldNotAllowMidTraversalBarriersOnComputer() {
            try {
                final GraphTraversal t = g.V().count().sum().iterate();
                fail("Mid-traversal barrier steps are not allowed (COMPUTER): " + t);
            } catch (IllegalStateException e) {
                assertTrue(true);
            }

            try {
                final GraphTraversal t = g.V().count().sum().map(x -> mul(x.get(), 19)).iterate();
                fail("Mid-traversal barrier steps are not allowed (COMPUTER): " + t);
            } catch (IllegalStateException e) {
                assertTrue(true);
            }
        }

        @Test
        @LoadGraphWith(MODERN)
        public void shouldNotAllowLocalTraversalsToLeaveTheStarGraphOnComputer() {
            try {
                final GraphTraversal t = g.V().local(out().out()).iterate();
                fail("Local traversals should not be allowed to leave the star-graph (COMPUTER): " + t);
            } catch (IllegalStateException e) {
                assertTrue(true);
            }

            try {
                final GraphTraversal t = g.V().local(out().values("name")).iterate();
                fail("Local traversals should not be allowed to leave the star-graph (COMPUTER): " + t);
            } catch (IllegalStateException e) {
                assertTrue(true);
            }

            try {
                g.V().local(outE().values("weight")).iterate();
                g.V().local(out().id()).iterate();
                g.V().local(outE().inV()).iterate();
            } catch (IllegalStateException e) {
                fail("Local traversals on the star-graph are OK on COMPUTER: " + e.getMessage());
            }
        }
    }
}