package org.eclipse.cdt.debug.testplugin;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.zip.ZipFile;

import org.eclipse.cdt.core.CCorePlugin;
import org.eclipse.cdt.core.CProjectNature;
import org.eclipse.cdt.core.ICDescriptor;
import org.eclipse.cdt.core.model.IArchive;
import org.eclipse.cdt.core.model.IArchiveContainer;
import org.eclipse.cdt.core.model.IBinary;
import org.eclipse.cdt.core.model.IBinaryContainer;
import org.eclipse.cdt.core.model.ICElement;
import org.eclipse.cdt.core.model.ICProject;
import org.eclipse.cdt.core.model.ITranslationUnit;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.ui.dialogs.IOverwriteQuery;
import org.eclipse.ui.wizards.datatransfer.ImportOperation;
import org.eclipse.ui.wizards.datatransfer.ZipFileStructureProvider;

/**
 * Helper methods to set up a ICProject.
 */
public class CProjectHelper {
	/**
	 * Creates a ICProject.
	 */	
	public static ICProject createCProjectWithImport(String projectName, String zipFile) throws CoreException, InvocationTargetException, IOException {
		IWorkspaceRoot root= ResourcesPlugin.getWorkspace().getRoot();
		IProject project= root.getProject(projectName);
		if (!project.exists()) {
			project.create(null);
		} else {
			project.refreshLocal(IResource.DEPTH_INFINITE, null);
		}
		
		if (!project.isOpen()) {
			project.open(null);
		}
		importFilesFromZip(new ZipFile(zipFile),project.getFullPath(),null);
		
		if (!project.hasNature(CProjectNature.C_NATURE_ID)) {
			addNatureToProject(project, CProjectNature.C_NATURE_ID, null);
		}
		
		ICProject cproject = CCorePlugin.getDefault().getCoreModel().create(project);
		/* Try to guess at the correct binary parser.. elf or pe at this point.. */
		String os = System.getProperty("os.name");
		boolean pe=(os.toLowerCase().indexOf("windows")!=-1);
		ICDescriptor desc = CCorePlugin.getDefault().getCProjectDescription(project);
		desc.remove(CCorePlugin.BINARY_PARSER_UNIQ_ID);
		desc.create(CCorePlugin.BINARY_PARSER_UNIQ_ID, pe?"org.eclipse.cdt.core.PE":"org.eclipse.cdt.core.ELF");
		CCorePlugin.getDefault().getCoreModel().resetBinaryParser(project);
		return cproject;	
	}
	

	/**
	 * Creates a ICProject.
	 */	
	public static ICProject createCProject(String projectName) throws CoreException {
		IWorkspaceRoot root= ResourcesPlugin.getWorkspace().getRoot();
		IProject project= root.getProject(projectName);
		if (!project.exists()) {
			project.create(null);
		} else {
			project.refreshLocal(IResource.DEPTH_INFINITE, null);
		}
		
		if (!project.isOpen()) {
			project.open(null);
		}
		
		if (!project.hasNature(CProjectNature.C_NATURE_ID)) {
			addNatureToProject(project, CProjectNature.C_NATURE_ID, null);
		}
		
		ICProject cproject = CCorePlugin.getDefault().getCoreModel().create(project);
		
		return cproject;	
	}
	
	/**
	 * Removes a ICProject.
	 */		
	public static void delete(ICProject cproject) throws CoreException {
		cproject.getProject().delete(true, true, null);
	}


	/**
	 * Attempts to find an archive with the given name in the workspace
	 */
	public static IArchive findArchive(ICProject testProject,String name) {
		int x;
		IArchive[] myArchives;
		IArchiveContainer archCont;
		archCont=testProject.getArchiveContainer();
		myArchives=archCont.getArchives();
		if (myArchives.length<1) 
			return(null);
		for (x=0;x<myArchives.length;x++) {
			if (myArchives[x].getElementName().equals(name))
					return(myArchives[x]);
		}
		return(null);
	}	
	/**
	 * Attempts to find a binary with the given name in the workspace
	 */
	public static IBinary findBinary(ICProject testProject,String name) {
		IBinaryContainer binCont;
		int x;
		IBinary[] myBinaries;
		binCont=testProject.getBinaryContainer();
		myBinaries=binCont.getBinaries();
		if (myBinaries.length<1) 
			return(null);
		for (x=0;x<myBinaries.length;x++) {
			if (myBinaries[x].getElementName().equals(name))
					return(myBinaries[x]);
				
		}
		return(null);
	}	

	/**
	 * Attempts to find an object with the given name in the workspace
	 */
	public static IBinary findObject(ICProject testProject,String name) {
		int x;
		ICElement[] myElements;
		myElements=testProject.getChildren();
		if (myElements.length<1) 
			return(null);
		for (x=0;x<myElements.length;x++) {
			if (myElements[x].getElementName().equals(name))
				if (myElements[x] instanceof ICElement) {
					if (myElements[x] instanceof IBinary) {
						 return((IBinary) myElements[x]);
					}
				} 				
		}
		return(null);
	}	
	/**
	 * Attempts to find a TranslationUnit with the given name in the workspace
	 */
	public static ITranslationUnit findTranslationUnit(ICProject testProject,String name) {
		int x;
		ICElement[] myElements;
		myElements=testProject.getChildren();
		if (myElements.length<1) 
			return(null);
		for (x=0;x<myElements.length;x++) {
			if (myElements[x].getElementName().equals(name))
				if (myElements[x] instanceof ICElement) {
					if (myElements[x] instanceof ITranslationUnit) {
						 return((ITranslationUnit) myElements[x]);
					}
				} 				
		}
		return(null);
	}	


	/**
	 * Attempts to find an element with the given name in the workspace
	 */
	public static ICElement findElement(ICProject testProject,String name) {
		int x;
		ICElement[] myElements;
		myElements=testProject.getChildren();
		if (myElements.length<1) 
			return(null);
		for (x=0;x<myElements.length;x++) {
			if (myElements[x].getElementName().equals(name))
				if (myElements[x] instanceof ICElement) {
					return((ICElement) myElements[x]);
				} 
				
				
		}
		return(null);
	}	
		

	private static void addNatureToProject(IProject proj, String natureId, IProgressMonitor monitor) throws CoreException {
		IProjectDescription description = proj.getDescription();
		String[] prevNatures= description.getNatureIds();
		String[] newNatures= new String[prevNatures.length + 1];
		System.arraycopy(prevNatures, 0, newNatures, 0, prevNatures.length);
		newNatures[prevNatures.length]= natureId;
		description.setNatureIds(newNatures);
		proj.setDescription(description, monitor);
	}
	
	private static void importFilesFromZip(ZipFile srcZipFile, IPath destPath, IProgressMonitor monitor) throws InvocationTargetException {		
		ZipFileStructureProvider structureProvider=	new ZipFileStructureProvider(srcZipFile);
		try {
			ImportOperation op= new ImportOperation(destPath, structureProvider.getRoot(), structureProvider, new ImportOverwriteQuery());
			op.run(monitor);
		} catch (InterruptedException e) {
			// should not happen
		}
	}
	
	private static class ImportOverwriteQuery implements IOverwriteQuery {
		public String queryOverwrite(String file) {
			return ALL;
		}	
	}		
	
	
}