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

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import net.sourceforge.fenixedu.applicationTier.FenixService;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.dataTransferObject.spaceManager.CreateBlueprintSubmissionBean;
import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.Role;
import net.sourceforge.fenixedu.domain.accessControl.RoleGroup;
import net.sourceforge.fenixedu.domain.person.RoleType;
import net.sourceforge.fenixedu.domain.space.Blueprint;
import net.sourceforge.fenixedu.domain.space.BlueprintFile;
import net.sourceforge.fenixedu.domain.space.Space;
import net.sourceforge.fenixedu.domain.space.SpaceInformation;
import net.sourceforge.fenixedu.util.ByteArray;
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;
import pt.utl.ist.fenix.tools.util.FileUtils;

public abstract class BlueprintVersionManagmentService extends FenixService {

    protected Space getSpace(CreateBlueprintSubmissionBean blueprintSubmissionBean) throws FenixServiceException {
	final SpaceInformation spaceInformation = blueprintSubmissionBean.getSpaceInformation();
	final Space space = spaceInformation.getSpace();
	if (space == null) {
	    throw new FenixServiceException("error.blueprint.submission.no.space");
	}
	return space;
    }

    protected void editBlueprintVersion(CreateBlueprintSubmissionBean blueprintSubmissionBean, final Space space,
	    final Person person, final Blueprint blueprint) throws IOException {

	final String filename = blueprintSubmissionBean.getSpaceInformation().getIdInternal()
		+ String.valueOf(System.currentTimeMillis());
	final byte[] contents = readInputStream(blueprintSubmissionBean.getInputStream());
	final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(contents);

	final FileDescriptor fileDescriptor = FileManagerFactory.getFactoryInstance().getFileManager().saveFile(
		getVirtualPath(space.getMostRecentSpaceInformation()), filename, true, person.getName(), filename,
		byteArrayInputStream);

	final String displayName = blueprintSubmissionBean.getFilename();
	final BlueprintFile blueprintFile = new BlueprintFile(blueprint, filename, displayName, fileDescriptor.getMimeType(),
		fileDescriptor.getChecksum(), fileDescriptor.getChecksumAlgorithm(), fileDescriptor.getSize(), fileDescriptor
			.getUniqueId(), new RoleGroup(Role.getRoleByRoleType(RoleType.SPACE_MANAGER)));
	blueprintFile.setContent(new ByteArray(contents));
    }

    private byte[] readInputStream(final InputStream inputStream) throws IOException {
	final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
	FileUtils.copy(inputStream, byteArrayOutputStream);
	return byteArrayOutputStream.toByteArray();
    }

    protected VirtualPath getVirtualPath(SpaceInformation spaceInformation) {
	final VirtualPath filePath = new VirtualPath();
	filePath.addNode(new VirtualPathNode("Spaces", "Spaces"));
	filePath.addNode(new VirtualPathNode("Spaces" + spaceInformation.getSpace().getIdInternal(), spaceInformation
		.getPresentationName()));
	filePath.addNode(new VirtualPathNode("Blueprints", "Blueprints"));
	return filePath;
    }

}