/*
 * Copyright 2010-2012 JetBrains s.r.o.
 *
 * Licensed 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.jetbrains.jet.codegen;

import gnu.trove.THashSet;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jetbrains.jet.CompileCompilerDependenciesTest;
import org.jetbrains.jet.ConfigurationKind;
import org.jetbrains.jet.JetTestUtils;
import org.jetbrains.jet.TestJdkKind;
import org.jetbrains.jet.cli.common.CLIConfigurationKeys;
import org.jetbrains.jet.cli.common.messages.MessageCollector;
import org.jetbrains.jet.cli.jvm.JVMConfigurationKeys;
import org.jetbrains.jet.cli.jvm.compiler.JetCoreEnvironment;
import org.jetbrains.jet.cli.jvm.compiler.K2JVMCompileEnvironmentConfiguration;
import org.jetbrains.jet.cli.jvm.compiler.KotlinToJVMBytecodeCompiler;
import org.jetbrains.jet.codegen.forTestCompile.ForTestCompileRuntime;
import org.jetbrains.jet.config.CommonConfigurationKeys;
import org.jetbrains.jet.config.CompilerConfiguration;
import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
import org.jetbrains.jet.lang.psi.JetClass;
import org.jetbrains.jet.lang.psi.JetDeclaration;
import org.jetbrains.jet.lang.psi.JetFile;
import org.jetbrains.jet.lang.resolve.BindingContext;
import org.jetbrains.jet.lang.resolve.DescriptorUtils;
import org.jetbrains.jet.lang.types.JetType;
import org.jetbrains.jet.parsing.JetParsingTest;
import org.jetbrains.jet.utils.ExceptionUtils;

import java.io.File;
import java.lang.reflect.Constructor;
import java.lang.reflect.Modifier;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Set;

/**
 * @author alex.tkachman
 */
public class TestlibTest extends CodegenTestCase {

    private File junitJar;

    public static Test suite() {
        return new TestlibTest().buildSuite();
    }

    protected TestSuite buildSuite() {
        try {
            setUp();
            return doBuildSuite();
        } catch (Exception e) {
            throw ExceptionUtils.rethrow(e);
        }
        finally {
            try {
                tearDown();
            } catch (Exception e) {
                throw ExceptionUtils.rethrow(e);
            }
        }
    }

    private TestSuite doBuildSuite() {
        try {
            GenerationState generationState = KotlinToJVMBytecodeCompiler.analyzeAndGenerate(
                    new K2JVMCompileEnvironmentConfiguration(myEnvironment), false);

            if (generationState == null) {
                throw new RuntimeException("There were compilation errors");
            }

            ClassFileFactory classFileFactory = generationState.getFactory();

            final GeneratedClassLoader loader = new GeneratedClassLoader(
                    classFileFactory,
                    new URLClassLoader(new URL[]{ForTestCompileRuntime.runtimeJarForTests().toURI().toURL(), junitJar.toURI().toURL()},
                                       TestCase.class.getClassLoader()));

            JetTypeMapper typeMapper = generationState.getInjector().getJetTypeMapper();
            TestSuite suite = new TestSuite("stdlib_test");
            try {
                for(JetFile jetFile : myEnvironment.getSourceFiles()) {
                    for(JetDeclaration decl : jetFile.getDeclarations()) {
                        if (decl instanceof JetClass) {
                            JetClass jetClass = (JetClass) decl;

                            ClassDescriptor descriptor = (ClassDescriptor) generationState.getBindingContext().get(BindingContext.DECLARATION_TO_DESCRIPTOR, jetClass);
                            Set<JetType> allSuperTypes = new THashSet<JetType>();
                            DescriptorUtils.addSuperTypes(descriptor.getDefaultType(), allSuperTypes);

                            for(JetType type : allSuperTypes) {
                                String internalName = typeMapper.mapType(type, MapTypeMode.IMPL).getInternalName();
                                if(internalName.equals("junit/framework/Test")) {
                                    String name = typeMapper.mapType(descriptor.getDefaultType(), MapTypeMode.IMPL).getInternalName();
                                    System.out.println(name);
                                    Class<TestCase> aClass = (Class<TestCase>) loader.loadClass(name.replace('/', '.'));
                                    if ((aClass.getModifiers() & Modifier.ABSTRACT) == 0
                                     && (aClass.getModifiers() & Modifier.PUBLIC) != 0) {
                                        try {
                                            Constructor<TestCase> constructor = aClass.getConstructor();
                                            if (constructor != null && (constructor.getModifiers() & Modifier.PUBLIC) != 0) {
                                                suite.addTestSuite(aClass);
                                            }
                                        }
                                        //catch (final VerifyError e) {
                                        //    suite.addTest(new TestCase(aClass.getName()) {
                                        //        @Override
                                        //        public int countTestCases() {
                                        //            return 1;
                                        //        }
                                        //
                                        //        @Override
                                        //        public void run(TestResult result) {
                                        //            result.addError(this, new RuntimeException(e));
                                        //        }
                                        //    });
                                        //}
                                        catch (NoSuchMethodException e) {
                                        }
                                    }
                                    break;
                                }
                            }
                        }
                    }
                }
            }
            finally {
                typeMapper = null;
            }

            return suite;
        } catch (Exception e) {
            throw ExceptionUtils.rethrow(e);
        }
    }
    
    @Override
    public void setUp() throws Exception {
        super.setUp();
        CompilerConfiguration configuration = CompileCompilerDependenciesTest.compilerConfigurationForTests(ConfigurationKind.ALL,
                                                                                                            TestJdkKind.FULL_JDK);
        configuration.add(JVMConfigurationKeys.CLASSPATH_KEY, JetTestUtils.getAnnotationsJar());

        junitJar = new File("libraries/lib/junit-4.9.jar");
        assertTrue(junitJar.exists());
        configuration.add(JVMConfigurationKeys.CLASSPATH_KEY, junitJar);

        configuration.add(CommonConfigurationKeys.SOURCE_ROOTS_KEY, JetParsingTest.getTestDataDir() + "/../../libraries/stdlib/test");
        configuration.add(CommonConfigurationKeys.SOURCE_ROOTS_KEY, JetParsingTest.getTestDataDir() + "/../../libraries/kunit/src");
        configuration.put(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY, MessageCollector.PLAIN_TEXT_TO_SYSTEM_ERR);

        myEnvironment = new JetCoreEnvironment(getTestRootDisposable(), configuration);
    }
}