/*
 * 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
 *
 *   https://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.
 *
 *   SPDX-License-Identifier: Apache-2.0
 */

package org.apache.jena.mem.graph;

import java.util.function.Supplier;

import org.apache.jena.jmh.JmhDefaultOptions;
import org.apache.jena.mem.GraphMem;
import org.apache.jena.mem.graph.helper.Context;
import org.apache.jena.mem.graph.helper.Releases;

import org.junit.Assert;
import org.junit.Test;
import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.runner.Runner;


@State(Scope.Benchmark)
public class TestGraphCopy {

    @Param({
            "../testing/cheeses-0.1.ttl",
            "../testing/pizza.owl.rdf",
            "../testing/data.nt.gz",
    })
    public String param0_GraphUri;

    @Param({
            "GraphMemFast (current)",
            "GraphMemIndexedSet EAGER (current)",
//            "GraphMemIndexedSet LAZY (current)",
//            "GraphMemIndexedSet LAZY_PARALLEL (current)",
//            "GraphMemIndexedSet MINIMAL (current)",
//            "GraphMemRoaring EAGER (current)",
//            "GraphMemRoaring LAZY (current)",
//            "GraphMemRoaring LAZY_PARALLEL (current)",
//            "GraphMemRoaring MINIMAL (current)",
    })
    public String param1_GraphImplementation;

    @Param({
            "copy",
//            "findAndAddAll",
    })
    public String param2_CopyOrConstruct;

    Supplier<GraphMem> copySupplier;

    Supplier<GraphMem> newGraphSupplier;
    private GraphMem sutCurrent;

    @Benchmark
    public GraphMem copy() {
        return copySupplier.get();
    }

    private GraphMem nativeCopy() {
        return sutCurrent.copy();
    }

    private GraphMem findAndAddAll() {
        var copy = newGraphSupplier.get();
        sutCurrent.find().forEachRemaining(copy::add);
        return copy;
    }

    @Setup(Level.Trial)
    public void setupTrial() {
        var trialContext = new Context(param1_GraphImplementation);
        switch (trialContext.getJenaVersion()) {
            case CURRENT: {
                this.newGraphSupplier = () -> (GraphMem) Releases.current.createGraph(trialContext.getGraphClass());
                this.sutCurrent = this.newGraphSupplier.get();

                var triples = Releases.current.readTriples(param0_GraphUri);
                triples.forEach(this.sutCurrent::add);
            }
            break;
            case JENA_5_6_0:
            default:
                throw new IllegalArgumentException("Unsupported Jena version: " + trialContext.getJenaVersion());
        }
        switch (param2_CopyOrConstruct) {
            case "copy":
                this.copySupplier = this::nativeCopy;
                break;
            case "findAndAddAll":
                this.copySupplier = this::findAndAddAll;
                break;
            default:
                throw new IllegalArgumentException("Unsupported copy or construct: " + param2_CopyOrConstruct);
        }
    }

    @Test
    public void benchmark() throws Exception {
        var opt = JmhDefaultOptions.getDefaults(this.getClass())
                .build();
        var results = new Runner(opt).run();
        Assert.assertNotNull(results);
    }
}
