package com.intellij.plugins.project.model;

import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.editor.Document;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.fileEditor.FileDocumentManager;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.roots.ProjectFileIndex;
import com.intellij.openapi.roots.ProjectRootManager;
import com.intellij.openapi.ui.Messages;
import com.intellij.openapi.vfs.VirtualFile;

/**
 * @author Anna Bulenkova
 */
public class ProjectFileIndexSampleAction extends AnAction {
    @Override
    public void update(final AnActionEvent event) {
        Project project = event.getProject();
        final Editor editor = event.getData(CommonDataKeys.EDITOR);
        boolean visibility = project != null && editor != null;
        event.getPresentation().setEnabledAndVisible(visibility);
    }

    @Override
    public void actionPerformed(final AnActionEvent event) {
        Project project = event.getProject();
        final Editor editor = event.getData(CommonDataKeys.EDITOR);
        if (project == null || editor == null) return;
        Document document = editor.getDocument();
        FileDocumentManager fileDocumentManager = FileDocumentManager.getInstance();
        VirtualFile virtualFile = fileDocumentManager.getFile(document);
        ProjectFileIndex projectFileIndex = ProjectRootManager.getInstance(project).getFileIndex();
        if (virtualFile != null) {
            Module module = projectFileIndex.getModuleForFile(virtualFile);
            String moduleName;
            moduleName = module != null ? module.getName() : "No module defined for file";

            VirtualFile moduleContentRoot = projectFileIndex.getContentRootForFile(virtualFile);
            boolean isLibraryFile = projectFileIndex.isLibraryClassFile(virtualFile);
            boolean isInLibraryClasses = projectFileIndex.isInLibraryClasses(virtualFile);
            boolean isInLibrarySource = projectFileIndex.isInLibrarySource(virtualFile);
            Messages.showInfoMessage("Module: " + moduleName + "\n" +
                                     "Module content root: " + moduleContentRoot + "\n" +
                                     "Is library file: " + isLibraryFile + "\n" +
                                     "Is in library classes" + isInLibraryClasses +
                                     "Is in library source" + isInLibrarySource,
                                     "Main File Info for" + virtualFile.getName());
        }
    }
}