package org.openslx.dozmod.gui.wizard;

import java.awt.Window;

import org.apache.log4j.Logger;
import org.apache.thrift.TException;
import org.openslx.bwlp.thrift.iface.ImageBaseWrite;
import org.openslx.bwlp.thrift.iface.ImageVersionWrite;
import org.openslx.dozmod.gui.Gui;
import org.openslx.dozmod.gui.helper.MessageType;
import org.openslx.dozmod.gui.wizard.page.ImageCustomPermissionPage;
import org.openslx.dozmod.gui.wizard.page.ImageMetaDataPage;
import org.openslx.dozmod.gui.wizard.page.ImageUploadPage;
import org.openslx.dozmod.state.UploadWizardState;
import org.openslx.dozmod.thrift.Session;
import org.openslx.thrifthelper.ThriftManager;

@SuppressWarnings("serial")
public class ImageWizard extends Wizard {

	private final static Logger LOGGER = Logger.getLogger(ImageWizard.class);

	private final UploadWizardState uploadWizardState = new UploadWizardState();;
	protected ImageUploadPage imageUploadPage;
	protected ImageMetaDataPage imageMetaDataPage;
	protected ImageCustomPermissionPage imageCustomPermissionPage;

	/**
	 * Wizard for creating or editing an image
	 * 
	 * @param editExistingImage whether to create new or edit existing image
	 */
	public ImageWizard(Window parent) {
		super(parent);
		imageUploadPage = new ImageUploadPage(this, uploadWizardState);
		imageMetaDataPage = new ImageMetaDataPage(this, uploadWizardState);
		imageCustomPermissionPage = new ImageCustomPermissionPage(this, uploadWizardState);
		addPage(imageUploadPage);
		addPage(imageMetaDataPage);
		addPage(imageCustomPermissionPage);
	}

	@Override
	public String getWindowTitle() {
		return "Neues Image erzeugen";
	}

	@Override
	public boolean performFinish() {
		// TODO evaluate table state and create the map of permissions
		// 
		// since we only started the download and created a "blank" image entry
		// we can here do all the sanity checks on the fields of UploadWizardState
		// and react accordingly.
		// check state
		if (!isStateValid()) {
			LOGGER.error("Invalid state!");
			return false;
		} else {
			// TODO run the actually request over external threaded class
			try {
				// push to sat
				ThriftManager.getSatClient().updateImageBase(Session.getSatelliteToken(),
						uploadWizardState.uuid.toString(), imageBaseWriteFromState());
			} catch (TException e) {
				LOGGER.error("Fail to push image metadata to satellite: ", e);
				return false;
			}
		}

		// push permissions to satellite server
		if (uploadWizardState.permissionList != null) {
			// user skipped permission list stuff
			try {
				ThriftManager.getSatClient().writeImagePermissions(Session.getSatelliteToken(),
						uploadWizardState.uuid, uploadWizardState.permissionList);
			} catch (TException e) {
				// TODO Auto-generated catch block
				LOGGER.error("Could not write permissions list to satellite: ", e);
				return false;
			}
		}
		try {
			// push to sat
			ThriftManager.getSatClient().updateImageVersion(Session.getSatelliteToken(),
					uploadWizardState.transferInformation.getToken(),
					new ImageVersionWrite(uploadWizardState.isEnabled, uploadWizardState.isRestricted));
		} catch (TException e) {
			LOGGER.error("Could not set active/restricted flags to satellite: ", e);
			return false;
		}

		Gui.showMessageBox(this, "Creation of image worked :)", MessageType.INFO, LOGGER, null);
		return true;
	}

	private boolean isStateValid() {
		// debug purposes
		if (uploadWizardState.name == null || uploadWizardState.name.isEmpty()) {
			LOGGER.error("No name set in state!");
			return false;
		}
		if (uploadWizardState.description == null || uploadWizardState.description.isEmpty()) {
			LOGGER.error("No description set in state!");
			return false;
		}
		if (uploadWizardState.descriptionFile == null) {
			LOGGER.error("No description file set in state!");
			return false;
		} else {
			if (!uploadWizardState.descriptionFile.canRead()) {
				LOGGER.error(uploadWizardState.descriptionFile.getAbsolutePath() + " cannot be read!");
				return false;
			}
		}
		if (uploadWizardState.diskFile == null) {
			LOGGER.error("No disk file set in state!");
			return false;
		} else {
			if (!uploadWizardState.diskFile.canRead()) {
				LOGGER.error(uploadWizardState.diskFile.getAbsolutePath() + " cannot be read!");
				return false;
			}
		}
		if (uploadWizardState.selectedOs == null) {
			LOGGER.error("No OS set in state!");
			return false;
		} else {
			if (!(uploadWizardState.selectedOs.isSetArchitecture()
					&& uploadWizardState.selectedOs.isSetOsId() && uploadWizardState.selectedOs.isSetOsName() && uploadWizardState.selectedOs.isSetVirtualizerOsId())) {
				LOGGER.error("OS has missing fields: " + uploadWizardState.selectedOs.toString());
				return false;
			}
		}
		if (uploadWizardState.meta == null) {
			LOGGER.error("No vm meta data set in state!");
			return false;
		}
		if (uploadWizardState.permissions == null) {
			LOGGER.error("No permissions set in state!");
			return false;
		}
		if (uploadWizardState.shareMode == null) {
			LOGGER.error("No share mode set in state!");
			return false;
		}
		if (uploadWizardState.uuid == null) {
			LOGGER.error("No uuid set in state!");
			return false;
		}
		return true;
	}

	private ImageBaseWrite imageBaseWriteFromState() {
		// build imageBaseWrite
		return new ImageBaseWrite(uploadWizardState.name, uploadWizardState.description,
				uploadWizardState.selectedOs.getOsId(), uploadWizardState.meta.getVirtualizer().getVirtId(),
				uploadWizardState.isTemplate, uploadWizardState.permissions, uploadWizardState.shareMode);
	}
}