/*
 * 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
 *
 *   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.netbeans.modules.j2ee.ejbjarproject;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Properties;
import java.util.Set;
import org.apache.tools.ant.module.api.support.ActionUtils;
import org.netbeans.api.project.FileOwnerQuery;
import org.netbeans.api.project.Project;
import org.netbeans.api.project.ProjectManager;
import org.netbeans.modules.j2ee.ejbjarproject.ui.customizer.EjbJarProjectProperties;
import org.netbeans.modules.java.api.common.SourceRoots;
import org.netbeans.spi.project.ActionProvider;
import org.netbeans.spi.project.CopyOperationImplementation;
import org.netbeans.spi.project.DeleteOperationImplementation;
import org.netbeans.spi.project.MoveOperationImplementation;
import org.netbeans.spi.project.support.ant.AntProjectHelper;
import org.netbeans.spi.project.support.ant.EditableProperties;
import org.netbeans.spi.project.support.ant.GeneratedFilesHelper;
import org.netbeans.spi.project.support.ant.PropertyEvaluator;
import org.netbeans.spi.project.support.ant.PropertyUtils;
import org.openide.filesystems.FileObject;
import org.openide.filesystems.FileUtil;
import org.openide.util.Lookup;
import org.openide.util.lookup.Lookups;

/**
 *
 * @author Jan Lahoda
 */
public class EjbJarProjectOperations implements DeleteOperationImplementation, CopyOperationImplementation, MoveOperationImplementation {
    
    private EjbJarProject project;
    //RELY: Valid only on original project after the notifyMoving or notifyCopying was called
    private String libraryPath;
    //RELY: Valid only on original project after the notifyMoving or notifyCopying was called
    private File libraryFile;
    //RELY: Valid only on original project after the notifyMoving or notifyCopying was called
    private boolean libraryWithinProject;
    //RELY: Valid only on original project after the notifyMoving or notifyCopying was called
    private String absolutesRelPath;
    
    public EjbJarProjectOperations(EjbJarProject project) {
        this.project = project;
    }
    
    private static void addFile(FileObject projectDirectory, String fileName, List<FileObject> result) {
        FileObject file = projectDirectory.getFileObject(fileName);
        
        if (file != null) {
            result.add(file);
        }
    }
    
    public List<FileObject> getMetadataFiles() {
        FileObject projectDirectory = project.getProjectDirectory();
        List<FileObject> files = new ArrayList<FileObject>();
        
        addFile(projectDirectory, "nbproject", files); // NOI18N
        addFile(projectDirectory, "build.xml", files); // NOI18N
        addFile(projectDirectory, "catalog.xml", files); //NOI18N
        
        return files;
    }
    
    public List<FileObject> getDataFiles() {
        List<FileObject> files = new ArrayList<FileObject>();
        
        FileObject metaInf = project.getEjbModule().getMetaInf();
        if (metaInf != null) {
            files.add(metaInf);
        }
        
        SourceRoots src = project.getSourceRoots();
        FileObject[] srcRoots = src.getRoots();
        
        for (int cntr = 0; cntr < srcRoots.length; cntr++) {
            files.add(srcRoots[cntr]);
        }
        
        PropertyEvaluator evaluator = project.evaluator();
        String prop = evaluator.getProperty(EjbJarProjectProperties.SOURCE_ROOT);
        if (prop != null) {
            FileObject projectDirectory = project.getProjectDirectory();
            FileObject srcDir = project.getAntProjectHelper().resolveFileObject(prop);
            if (projectDirectory != srcDir && !files.contains(srcDir)) {
                files.add(srcDir);
            }
        }
  
        SourceRoots test = project.getTestSourceRoots();
        FileObject[] testRoots = test.getRoots();
        
        for (int cntr = 0; cntr < testRoots.length; cntr++) {
            files.add(testRoots[cntr]);
        }
        
        File resourceDir = project.getEjbModule().getResourceDirectory();
        if (resourceDir != null) {
            FileObject resourceFO = FileUtil.toFileObject(resourceDir);
            if (resourceFO != null) {
                files.add(resourceFO);
            }
        }
        
        // add libraries folder if it is within project:
        AntProjectHelper helper = project.getAntProjectHelper();
        if (helper.getLibrariesLocation() != null) {
            File f = helper.resolveFile(helper.getLibrariesLocation());
            if (f != null && f.exists()) {
                FileObject libFolder = FileUtil.toFileObject(f).getParent();
                if (FileUtil.isParentOf(project.getProjectDirectory(), libFolder)) {
                    files.add(libFolder);
                }
            }
        }
        
        return files;
    }
    
    @Override
    public void notifyDeleting() throws IOException {
        FileObject buildXML = project.getProjectDirectory().getFileObject(GeneratedFilesHelper.BUILD_XML_PATH);
        ActionUtils.runTarget(buildXML, new String[]{ActionProvider.COMMAND_CLEAN}, new Properties()).waitFinished();
    }
    
    public void notifyDeleted() throws IOException {
        project.getAntProjectHelper().notifyDeleted();
    }
    
    public void notifyCopying() {
        rememberLibraryLocation();
    }
    
    public void notifyCopied(Project original, File originalPath, String nueName) {
        if (original == null) {
            //do nothing for the original project.
            return ;
        }
        
        project.getReferenceHelper().fixReferences(originalPath);
        EjbJarProjectOperations origOperations = original.getLookup().lookup(EjbJarProjectOperations.class);
        fixLibraryLocation(origOperations);
        
        fixOtherReferences(originalPath);
        
        project.setName(nueName);
    }
    
    public void notifyMoving() throws IOException {
        rememberLibraryLocation();
        notifyDeleting();
    }
    
    public void notifyMoved(Project original, File originalPath, final String newName) {
        if (original == null) {
            project.getAntProjectHelper().notifyDeleted();
            return ;
        }
        
	final String oldProjectName = project.getName();

        project.setName(newName);
        project.getReferenceHelper().fixReferences(originalPath);        
        EjbJarProjectOperations origOperations = original.getLookup().lookup(EjbJarProjectOperations.class);
        fixLibraryLocation(origOperations);
        
        fixOtherReferences(originalPath);
	
        ProjectManager.mutex().writeAccess(new Runnable() {
            public void run() {
		AntProjectHelper helper = project.getAntProjectHelper();
		EditableProperties projectProps = helper.getProperties(AntProjectHelper.PROJECT_PROPERTIES_PATH);

		String jarName = projectProps.get(EjbJarProjectProperties.JAR_NAME);
		String oldName = jarName.substring(0, jarName.length() - 4);
		if (jarName.endsWith(".jar") && oldName.equals(oldProjectName)) { //NOI18N
                    projectProps.put(EjbJarProjectProperties.JAR_NAME, newName + ".jar"); //NOI18N
                }

		helper.putProperties(AntProjectHelper.PROJECT_PROPERTIES_PATH, projectProps);
            }
        });
    }
    
    private void fixOtherReferences(final File originalPath) {
        final String property = EjbJarProjectProperties.META_INF;
        final File projectDir = FileUtil.toFile(project.getProjectDirectory());
                
        ProjectManager.mutex().writeAccess(new Runnable() {
            public void run() {
                EditableProperties props = project.getAntProjectHelper().getProperties(AntProjectHelper.PROJECT_PROPERTIES_PATH);
                String path = props.getProperty(property);
                if (path == null) {
                    return;
                }

                if (path.startsWith(originalPath.getAbsolutePath())) {
                    String relative = PropertyUtils.relativizeFile(originalPath, new File(path));
                    if (relative != null) {
                        String fixedPath = new File(projectDir, relative).getAbsolutePath();
                        props.setProperty(property, fixedPath);
                        project.getAntProjectHelper().putProperties(AntProjectHelper.PROJECT_PROPERTIES_PATH, props);
                    }
                }
            }
        });
    }
    
    private static boolean isParent(File folder, File fo) {
        if (folder.equals(fo)) {
            return false;
        }
        
        while (fo != null) {
            if (fo.equals(folder)) {
                return true;
            }
            
            fo = fo.getParentFile();
        }
        
        return false;
    }
    
    private void fixLibraryLocation(EjbJarProjectOperations original) throws IllegalArgumentException {
       String libPath = original.libraryPath;
        if (libPath != null) {
            if (!new File(libPath).isAbsolute()) {
                //relative path to libraries
                if (!original.libraryWithinProject) {
                    File file = original.libraryFile;
                    if (file == null) {
                        // could happen in some rare cases, but in that case the original project was already broken, don't fix.
                        return;
                    }
                    String relativized = PropertyUtils.relativizeFile(FileUtil.toFile(project.getProjectDirectory()), file);
                    if (relativized != null) {
                        project.getAntProjectHelper().setLibrariesLocation(relativized);
                    } else {
                        //cannot relativize, use absolute path
                        project.getAntProjectHelper().setLibrariesLocation(file.getAbsolutePath());
                    }
                } else {
                    //got copied over to new location.. the relative path is the same..
                }
            } else {

                //absolute path to libraries..
                if (original.libraryWithinProject) {
                    if (original.absolutesRelPath != null) {
                        project.getAntProjectHelper().setLibrariesLocation(PropertyUtils.resolveFile(FileUtil.toFile(project.getProjectDirectory()), original.absolutesRelPath).getAbsolutePath());
                    }
                } else {
                    // absolute path to an external folder stays the same.
                }
            }
        }
    }
    
    
    private void rememberLibraryLocation() {
      libraryWithinProject = false;
        absolutesRelPath = null;
        libraryPath = project.getAntProjectHelper().getLibrariesLocation();
        if (libraryPath != null) {
            File prjRoot = FileUtil.toFile(project.getProjectDirectory());
            libraryFile = PropertyUtils.resolveFile(prjRoot, libraryPath);
            if (FileOwnerQuery.getOwner(libraryFile.toURI()) == project && 
                    libraryFile.getAbsolutePath().startsWith(prjRoot.getAbsolutePath())) {
                //do not update the relative path if within the project..
                libraryWithinProject = true;
                FileObject fo = FileUtil.toFileObject(libraryFile);
                if (new File(libraryPath).isAbsolute() && fo != null) {
                    // if absolte path within project, it will get moved/copied..
                    absolutesRelPath = FileUtil.getRelativePath(project.getProjectDirectory(), fo);
                }
            }
        }
    }
    

}