/*
 * Copyright 2000-2013 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 com.intellij.execution.util;

import com.intellij.execution.CantRunException;
import com.intellij.execution.CommonJavaRunConfigurationParameters;
import com.intellij.execution.ExecutionBundle;
import com.intellij.execution.JavaExecutionUtil;
import com.intellij.execution.configurations.JavaParameters;
import com.intellij.execution.configurations.RunConfigurationModule;
import com.intellij.execution.configurations.RuntimeConfigurationWarning;
import com.intellij.execution.configurations.SimpleJavaParameters;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.module.ModuleUtilCore;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.projectRoots.JavaSdk;
import com.intellij.openapi.projectRoots.ProjectJdkTable;
import com.intellij.openapi.projectRoots.Sdk;
import com.intellij.openapi.projectRoots.ex.PathUtilEx;
import com.intellij.openapi.roots.*;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiFile;
import org.intellij.lang.annotations.MagicConstant;

import java.io.File;
import java.util.List;
import java.util.Map;

/**
 * @author lex
 * @since Nov 26, 2003
 */
public class JavaParametersUtil {
  private JavaParametersUtil() { }

  public static void configureConfiguration(SimpleJavaParameters parameters, CommonJavaRunConfigurationParameters configuration) {
    ProgramParametersUtil.configureConfiguration(parameters, configuration);

    Project project = configuration.getProject();
    Module module = ProgramParametersUtil.getModule(configuration);

    String vmParameters = configuration.getVMParameters();
    if (vmParameters != null) {
      vmParameters = ProgramParametersUtil.expandPath(vmParameters, module, project);

      for (Map.Entry<String, String> each : parameters.getEnv().entrySet()) {
        vmParameters = StringUtil.replace(vmParameters, "$" + each.getKey() + "$", each.getValue(), false); //replace env usages
      }
    }

    parameters.getVMParametersList().addParametersString(vmParameters);
  }

  public static int getClasspathType(final RunConfigurationModule configurationModule, final String mainClassName,
                                     final boolean classMustHaveSource) throws CantRunException {
    final Module module = configurationModule.getModule();
    if (module == null) throw CantRunException.noModuleConfigured(configurationModule.getModuleName());
    final PsiClass psiClass = JavaExecutionUtil.findMainClass(module, mainClassName);
    if (psiClass == null) {
      if (!classMustHaveSource) return JavaParameters.JDK_AND_CLASSES_AND_TESTS;
      throw CantRunException.classNotFound(mainClassName, module);
    }
    final PsiFile psiFile = psiClass.getContainingFile();
    if (psiFile == null) throw CantRunException.classNotFound(mainClassName, module);
    final VirtualFile virtualFile = psiFile.getVirtualFile();
    if (virtualFile == null) throw CantRunException.classNotFound(mainClassName, module);
    Module classModule = psiClass.isValid() ? ModuleUtilCore.findModuleForPsiElement(psiClass) : null;
    if (classModule == null) classModule = module;
    ModuleFileIndex fileIndex = ModuleRootManager.getInstance(classModule).getFileIndex();
    if (fileIndex.isInSourceContent(virtualFile)) {
      return fileIndex.
        isInTestSourceContent(virtualFile) ? JavaParameters.JDK_AND_CLASSES_AND_TESTS : JavaParameters.JDK_AND_CLASSES;
    }
    final List<OrderEntry> entriesForFile = fileIndex.getOrderEntriesForFile(virtualFile);
    for (OrderEntry entry : entriesForFile) {
      if (entry instanceof ExportableOrderEntry && ((ExportableOrderEntry)entry).getScope() == DependencyScope.TEST) return JavaParameters.JDK_AND_CLASSES_AND_TESTS;
    }
    return JavaParameters.JDK_AND_CLASSES;
  }

  public static void configureModule(final RunConfigurationModule runConfigurationModule,
                                     final JavaParameters parameters,
                                     @MagicConstant(valuesFromClass = JavaParameters.class) final int classPathType,
                                     final String jreHome) throws CantRunException {
    Module module = runConfigurationModule.getModule();
    if (module == null) {
      throw CantRunException.noModuleConfigured(runConfigurationModule.getModuleName());
    }
    configureModule(module, parameters, classPathType, jreHome);
  }

  public static void configureModule(Module module, JavaParameters parameters, @MagicConstant(valuesFromClass = JavaParameters.class) int classPathType, String jreHome) throws CantRunException {
    parameters.configureByModule(module, classPathType, createModuleJdk(module, jreHome));
  }

  public static void configureProject(Project project, final JavaParameters parameters, @MagicConstant(valuesFromClass = JavaParameters.class) final int classPathType, final String jreHome)
    throws CantRunException {
    parameters.configureByProject(project, classPathType, createProjectJdk(project, jreHome));
  }

  private static Sdk createModuleJdk(final Module module, final String jreHome) throws CantRunException {
    return jreHome == null ? JavaParameters.getModuleJdk(module) : createAlternativeJdk(jreHome);
  }

  public static Sdk createProjectJdk(final Project project, final String jreHome) throws CantRunException {
    return jreHome == null ? createProjectJdk(project) : createAlternativeJdk(jreHome);
  }

  private static Sdk createProjectJdk(final Project project) throws CantRunException {
    final Sdk jdk = PathUtilEx.getAnyJdk(project);
    if (jdk == null) {
      throw CantRunException.noJdkConfigured();
    }
    return jdk;
  }

  private static Sdk createAlternativeJdk(final String jreHome) throws CantRunException {
    final Sdk configuredJdk = ProjectJdkTable.getInstance().findJdk(jreHome);
    if (configuredJdk != null) {
      return configuredJdk;
    }
    final boolean isJdk = JavaSdk.checkForJdk(new File(jreHome));
    if (isJdk) {
      throw new CantRunException("Jre expected but jdk found");
    }
    final Sdk jdk = JavaSdk.getInstance().createJdk("", jreHome);
    if (jdk == null) throw CantRunException.noJdkConfigured();
    return jdk;
  }

  public static void checkAlternativeJRE(CommonJavaRunConfigurationParameters configuration) throws RuntimeConfigurationWarning {
    if (configuration.isAlternativeJrePathEnabled()) {
      final String alternativeJrePath = configuration.getAlternativeJrePath();
      if (alternativeJrePath == null ||
          alternativeJrePath.length() == 0 ||
          ProjectJdkTable.getInstance().findJdk(alternativeJrePath) == null && !JavaSdk.checkForJre(alternativeJrePath)) {
        throw new RuntimeConfigurationWarning(
          ExecutionBundle.message("jre.path.is.not.valid.jre.home.error.mesage", alternativeJrePath));
      }
    }
  }
}