package org.jboss.windup.rules.apps.java.scan.ast;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Collections;

import javax.inject.Inject;
import javax.inject.Singleton;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.RandomStringUtils;
import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.forge.arquillian.AddonDependencies;
import org.jboss.forge.arquillian.AddonDependency;
import org.jboss.forge.arquillian.archive.AddonArchive;
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.windup.ast.java.data.TypeReferenceLocation;
import org.jboss.windup.config.AbstractRuleProvider;
import org.jboss.windup.config.GraphRewrite;
import org.jboss.windup.config.loader.RuleLoaderContext;
import org.jboss.windup.config.metadata.MetadataBuilder;
import org.jboss.windup.config.operation.Iteration;
import org.jboss.windup.config.operation.iteration.AbstractIterationOperation;
import org.jboss.windup.engine.predicates.RuleProviderWithDependenciesPredicate;
import org.jboss.windup.exec.WindupProcessor;
import org.jboss.windup.exec.configuration.WindupConfiguration;
import org.jboss.windup.graph.GraphContext;
import org.jboss.windup.graph.GraphContextFactory;
import org.jboss.windup.graph.service.GraphService;
import org.jboss.windup.rules.apps.java.condition.JavaClass;
import org.jboss.windup.rules.apps.java.config.ScanPackagesOption;
import org.jboss.windup.rules.apps.java.config.SourceModeOption;
import org.jboss.windup.rules.apps.java.scan.provider.AnalyzeJavaFilesRuleProvider;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.ocpsoft.rewrite.config.Configuration;
import org.ocpsoft.rewrite.config.ConfigurationBuilder;
import org.ocpsoft.rewrite.context.EvaluationContext;

@RunWith(Arquillian.class)
public class ASTProcessorIntegrationTest
{
    @Deployment
    @AddonDependencies({
                @AddonDependency(name = "org.jboss.windup.config:windup-config"),
                @AddonDependency(name = "org.jboss.windup.exec:windup-exec"),
                @AddonDependency(name = "org.jboss.windup.rules.apps:windup-rules-java"),
                @AddonDependency(name = "org.jboss.windup.reporting:windup-reporting"),
                @AddonDependency(name = "org.jboss.windup.utils:windup-utils"),
                @AddonDependency(name = "org.jboss.forge.furnace.container:cdi")
    })
    public static AddonArchive getDeployment()
    {
        return ShrinkWrap.create(AddonArchive.class).addBeansXML();
    }

    @Inject
    JavaClassTestRuleProvider provider;

    @Inject
    private WindupProcessor processor;

    @Inject
    private GraphContextFactory factory;

    @Test
    public void testJavaSourceScanning() throws IOException, InstantiationException, IllegalAccessException
    {
        try (GraphContext context = factory.create(getDefaultPath()))
        {
            final String inputDir = "src/test/resources/simple";

            final Path outputPath = Paths.get(FileUtils.getTempDirectory().toString(),
                        "windup_" + RandomStringUtils.randomAlphanumeric(6));
            FileUtils.deleteDirectory(outputPath.toFile());
            Files.createDirectories(outputPath);

            final WindupConfiguration processorConfig = new WindupConfiguration();
            processorConfig.setRuleProviderFilter(new RuleProviderWithDependenciesPredicate(
                        JavaClassTestRuleProvider.class));
            processorConfig.setGraphContext(context);
            processorConfig.addInputPath(Paths.get(inputDir));
            processorConfig.setOutputDirectory(outputPath);
            processorConfig.setOptionValue(ScanPackagesOption.NAME, Collections.singletonList(""));
            processorConfig.setOptionValue(SourceModeOption.NAME, true);

            processor.execute(processorConfig);

            GraphService<JavaTypeReferenceModel> typeRefService = new GraphService<>(context, JavaTypeReferenceModel.class);
            Iterable<JavaTypeReferenceModel> typeReferences = typeRefService.findAll();
            Assert.assertTrue(typeReferences.iterator().hasNext());
            Assert.assertEquals(2, provider.getMyAclassTypeDeclaration());
            Assert.assertEquals(1, provider.getInterfaceCall());
            Assert.assertEquals(1, provider.getMethodDefault());
        }
    }

    private Path getDefaultPath()
    {
        return FileUtils.getTempDirectory().toPath().resolve("Windup")
                    .resolve("windupgraph_javaclasstest_" + RandomStringUtils.randomAlphanumeric(6));
    }

    @Singleton
    public static class JavaClassTestRuleProvider extends AbstractRuleProvider
    {
        private int myAclassTypeDeclaration = 0;
        private int interfaceCall = 0;
        private int methodDefault = 0;

        public JavaClassTestRuleProvider()
        {
            super(MetadataBuilder.forProvider(JavaClassTestRuleProvider.class)
                        .addExecuteAfter(AnalyzeJavaFilesRuleProvider.class));
        }

        // @formatter:off
        @Override
        public Configuration getConfiguration(RuleLoaderContext ruleLoaderContext)
        {
            return ConfigurationBuilder.begin()
            .addRule().when(
                JavaClass.references("simple.MyAClass").at(TypeReferenceLocation.TYPE)
            ).perform(
                Iteration.over().perform(new AbstractIterationOperation<JavaTypeReferenceModel>()
                {
                    @Override
                    public void perform(GraphRewrite event, EvaluationContext context, JavaTypeReferenceModel payload)
                    {
                        myAclassTypeDeclaration++;
                    }
                }).endIteration()
            )
                    
            .addRule().when(
                JavaClass.references("simple.SomeInterface.interfaceMethod()").at(TypeReferenceLocation.METHOD_CALL)
            ).perform(
                Iteration.over().perform(new AbstractIterationOperation<JavaTypeReferenceModel>()
                {
                    @Override
                    public void perform(GraphRewrite event, EvaluationContext context, JavaTypeReferenceModel payload)
                    {
                        interfaceCall++;
                    }
                }).endIteration()
            )
            
            .addRule().when(
                JavaClass.references("simple.SomeInterface.defaultMethod()")
                ).perform(
                            Iteration.over().perform(new AbstractIterationOperation<JavaTypeReferenceModel>()
                            {
                                @Override
                                public void perform(GraphRewrite event, EvaluationContext context, JavaTypeReferenceModel payload)
                                {
                                    methodDefault++;
                                }
                            }).endIteration()
                        )
            ;
        }
        // @formatter:on

        public int getMyAclassTypeDeclaration()
        {
            return myAclassTypeDeclaration;
        }

        public int getInterfaceCall()
        {
            return interfaceCall;
        }

        public int getMethodDefault()
        {
            return methodDefault;
        }

    }
}
