package net.sourceforge.fenixedu.applicationTier.Servico.research;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

import net.sourceforge.fenixedu.applicationTier.FenixService;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.UnitFile;
import net.sourceforge.fenixedu.domain.accessControl.EveryoneGroup;
import net.sourceforge.fenixedu.domain.accessControl.Group;
import net.sourceforge.fenixedu.domain.accessControl.GroupUnion;
import net.sourceforge.fenixedu.domain.accessControl.PersonGroup;
import net.sourceforge.fenixedu.domain.organizationalStructure.Unit;
import pt.ist.fenixWebFramework.services.Service;
import pt.utl.ist.fenix.tools.file.FileDescriptor;
import pt.utl.ist.fenix.tools.file.FileManagerFactory;
import pt.utl.ist.fenix.tools.file.VirtualPath;
import pt.utl.ist.fenix.tools.file.VirtualPathNode;

public class CreateUnitFile extends FenixService {

    @Service
    public static void run(java.io.File file, String originalFilename, String displayName, String description, String tags,
	    Group permittedGroup, Unit unit, Person person) throws FenixServiceException {

	InputStream is = null;
	try {
	    is = new FileInputStream(file);
	} catch (FileNotFoundException e) {
	    throw new FenixServiceException(e.getMessage());
	}

	final FileDescriptor fileDescriptor = FileManagerFactory.getFactoryInstance().getSimpleFileManager().saveFile(
		getVirtualPath(unit), originalFilename, !isPublic(permittedGroup), person.getName(), displayName, is);

	new UnitFile(unit, person, description, tags, fileDescriptor.getFilename(), pt.utl.ist.fenix.tools.util.FileUtils
		.getFilenameOnly(displayName), fileDescriptor.getMimeType(), fileDescriptor.getChecksum(), fileDescriptor
		.getChecksumAlgorithm(), fileDescriptor.getSize(), fileDescriptor.getUniqueId(),
		!isPublic(permittedGroup) ? new GroupUnion(permittedGroup, new PersonGroup(person)) : permittedGroup);
    }

    private static VirtualPath getVirtualPath(Unit unit) {

	final VirtualPath filePath = new VirtualPath();

	filePath.addNode(new VirtualPathNode("Research", "Research"));
	filePath.addNode(new VirtualPathNode("ResearchUnit" + unit.getIdInternal(), unit.getName()));

	return filePath;
    }

    private static boolean isPublic(Group permittedGroup) {
	if (permittedGroup == null) {
	    return true;
	}

	if (permittedGroup instanceof EveryoneGroup) {
	    return true;
	}

	return false;
    }
}