package org.symbian.tools.tmw.internal.ui.wizard;

import static org.eclipse.wst.common.project.facet.ui.internal.util.GridLayoutUtil.gdfill;

import static org.eclipse.wst.common.project.facet.ui.internal.util.GridLayoutUtil.gdhhint;

import static org.eclipse.wst.common.project.facet.ui.internal.util.GridLayoutUtil.gdhspan;

import static org.eclipse.wst.common.project.facet.ui.internal.util.GridLayoutUtil.gdwhint;

import static org.eclipse.wst.common.project.facet.ui.internal.util.GridLayoutUtil.gl;

import static org.eclipse.wst.common.project.facet.ui.internal.util.GridLayoutUtil.glmargins;

import static org.eclipse.wst.common.project.facet.ui.internal.util.SwtUtil.getPreferredWidth;

import static org.eclipse.wst.common.project.facet.ui.internal.util.SwtUtil.runOnDisplayThread;

import java.lang.reflect.Method;

import java.text.MessageFormat;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Set;

import java.util.SortedSet;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.jface.dialogs.Dialog;

import org.eclipse.jface.resource.CompositeImageDescriptor;

import org.eclipse.jface.resource.ImageDescriptor;

import org.eclipse.jface.resource.ImageRegistry;

import org.eclipse.jface.viewers.CheckStateChangedEvent;

import org.eclipse.jface.viewers.CheckboxTableViewer;

import org.eclipse.jface.viewers.ICheckStateListener;

import org.eclipse.jface.viewers.ILabelProviderListener;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.ISelectionProvider;

import org.eclipse.jface.viewers.IStructuredContentProvider;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.ITableLabelProvider;

import org.eclipse.jface.viewers.ITreeContentProvider;

import org.eclipse.jface.viewers.LabelProvider;

import org.eclipse.jface.viewers.SelectionChangedEvent;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.jface.viewers.TableViewer;

import org.eclipse.jface.viewers.Viewer;

import org.eclipse.jface.viewers.ViewerSorter;

import org.eclipse.jface.window.ToolTip;

import org.eclipse.swt.SWT;

import org.eclipse.swt.custom.SashForm;

import org.eclipse.swt.events.DisposeEvent;

import org.eclipse.swt.events.DisposeListener;

import org.eclipse.swt.graphics.Image;

import org.eclipse.swt.graphics.ImageData;

import org.eclipse.swt.graphics.Point;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Event;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Listener;

import org.eclipse.swt.widgets.Table;

import org.eclipse.swt.widgets.TableItem;

import org.eclipse.ui.ISharedImages;

import org.eclipse.ui.PlatformUI;

import org.eclipse.wst.common.project.facet.core.IFacetedProjectWorkingCopy;

import org.eclipse.wst.common.project.facet.core.IProjectFacet;

import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;

import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectEvent;

import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectListener;

import org.eclipse.wst.common.project.facet.core.events.IProjectFacetsChangedEvent;

import org.eclipse.wst.common.project.facet.core.runtime.RuntimeManager;

import org.eclipse.wst.common.project.facet.core.runtime.events.IRuntimeLifecycleEvent;

import org.eclipse.wst.common.project.facet.core.runtime.events.IRuntimeLifecycleListener;

import org.eclipse.wst.common.project.facet.ui.IDecorationsProvider;

import org.eclipse.wst.common.project.facet.ui.internal.FacetUiPlugin;

import org.symbian.tools.tmw.core.TMWCore;

/**

 * @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>

 */

public final class FacetsSelectionPanel extends Composite implements ISelectionProvider {

    private final Composite topComposite;

    private final SashForm sform1;

    private final CheckboxTableViewer tableViewer;

    private final Table table;

    private final FixedFacetToolTip fixedFacetToolTip;

    private final TableViewer problemsView;

    private boolean showToolTips;

    private final IFacetedProjectWorkingCopy fpjwc;

    private final List<IFacetedProjectListener> registeredWorkingCopyListeners;

    private final Map<IProjectFacet, IProjectFacetVersion> selectedVersions;

    private final List<ISelectionChangedListener> selectionListeners;

    private Object selection;

    private final ImageRegistry imageRegistry;

    private final IRuntimeLifecycleListener runtimeLifecycleListener;

    public interface IFilter {

        boolean check(IProjectFacetVersion fv);

    }

    public FacetsSelectionPanel(final Composite parent, final IFacetedProjectWorkingCopy fpjwc) {

        super(parent, SWT.NONE);

        this.fpjwc = fpjwc;

        this.registeredWorkingCopyListeners = new ArrayList<IFacetedProjectListener>();

        this.selectedVersions = new HashMap<IProjectFacet, IProjectFacetVersion>();

        this.selection = null;

        this.selectionListeners = new ArrayList<ISelectionChangedListener>();

        this.showToolTips = false;

        // Initialize the image registry.

        this.imageRegistry = new ImageRegistry();

        // Layout the panel.

        this.topComposite = new Composite(this, SWT.NONE);

        this.sform1 = new SashForm(this.topComposite, SWT.VERTICAL | SWT.SMOOTH);

        this.sform1.setLayoutData(gdhspan(gdfill(), 4));

        this.tableViewer = new CheckboxTableViewer(this.table);

        this.tableViewer.setLabelProvider(new FacetColumnLabelProvider());

        this.tableViewer.setContentProvider(new ContentProvider());

        this.tableViewer.setSorter(new Sorter());

        this.fixedFacetToolTip = new FixedFacetToolTip(this.table);

        this.tableViewer.setInput(new Object());

        this.tableViewer.addSelectionChangedListener(new ISelectionChangedListener() {

            public void selectionChanged(final SelectionChangedEvent e) {

                FacetsSelectionPanel.this.handleSelectionChangedEvent();

            }

        });

        this.tableViewer.addCheckStateListener(new ICheckStateListener() {

            public void checkStateChanged(final CheckStateChangedEvent e) {

                FacetsSelectionPanel.this.handleCheckStateChanged(e);

            }

        });

        this.table.addListener(SWT.MouseDown, new Listener() {

            public void handleEvent(final Event event) {

                handleMouseDownEvent(event);

            }

        });

        this.problemsView = new TableViewer(this.sform1, SWT.BORDER);

        this.problemsView.setContentProvider(new ProblemsContentProvider());

        this.problemsView.setLabelProvider(new ProblemsLabelProvider());

        this.problemsView.setInput(new Object());

        addDisposeListener(new DisposeListener() {

            public void widgetDisposed(final DisposeEvent e) {

                handleDisposeEvent();

            }

        });

        Dialog.applyDialogFont(parent);

        // Setup runtime lifecycle listener.

        this.runtimeLifecycleListener = new IRuntimeLifecycleListener() {

            public void handleEvent(final IRuntimeLifecycleEvent event) {

                handleValidationProblemsChangedEvent();

            }

        };

        RuntimeManager

                .addListener(this.runtimeLifecycleListener, IRuntimeLifecycleEvent.Type.VALIDATION_STATUS_CHANGED);

        // Bind to the model.

        addWorkingCopyListener(new IFacetedProjectListener() {

            public void handleEvent(final IFacetedProjectEvent event) {

                handleProjectFacetsChangedEvent(event);

            }

        }, IFacetedProjectEvent.Type.PROJECT_FACETS_CHANGED);

        handleProjectFacetsChangedEvent(null);

        addWorkingCopyListener(new IFacetedProjectListener() {

            public void handleEvent(final IFacetedProjectEvent event) {

                handleValidationProblemsChangedEvent();

            }

        }, IFacetedProjectEvent.Type.VALIDATION_PROBLEMS_CHANGED, IFacetedProjectEvent.Type.PROJECT_MODIFIED);

        handleValidationProblemsChangedEvent();

        addWorkingCopyListener(new IFacetedProjectListener() {

            public void handleEvent(final IFacetedProjectEvent event) {

                handleModelChangedEvent(event);

            }

        }, IFacetedProjectEvent.Type.FIXED_FACETS_CHANGED, IFacetedProjectEvent.Type.SELECTED_PRESET_CHANGED,

                IFacetedProjectEvent.Type.TARGETED_RUNTIMES_CHANGED);

        // Set the preferred dimensions of the panel.

        final int prefWidthTree = getPreferredWidth(this.table);

        final int prefWidth = prefWidthTree + 80;

        this.sform1.setWeights(new int[] { 70, 30 });

        // Select the first item in the table.

        if (this.table.getItemCount() > 0) {

            final TableItem firstItem = this.table.getItem(0);

            this.tableViewer.setSelection(new StructuredSelection(firstItem.getData()));

        }

        handleSelectionChangedEvent();

    }

    public IFacetedProjectWorkingCopy getFacetedProjectWorkingCopy() {

        return this.fpjwc;

    }

    public boolean isSelectionValid() {

        return (this.fpjwc.validate().getSeverity() != IStatus.ERROR);

    }

    public boolean setFocus() {

        return this.table.setFocus();

    }

    public void addSelectionChangedListener(final ISelectionChangedListener listener) {

        this.selectionListeners.add(listener);

    }

    public void removeSelectionChangedListener(final ISelectionChangedListener listener) {

        this.selectionListeners.remove(listener);

    }

    public ISelection getSelection() {

        if (this.selection != null) {

            return new StructuredSelection(this.selection);

        } else {

            return new StructuredSelection(new Object[0]);

        }

    }

    public void setSelection(final ISelection selection) {

        throw new UnsupportedOperationException();

    }

    private void notifySelectionChangedListeners() {

        final SelectionChangedEvent event = new SelectionChangedEvent(this, getSelection());

        for (ISelectionChangedListener listener : this.selectionListeners) {

            listener.selectionChanged(event);

        }

    }

    private ImageRegistry getImageRegistry() {

        return this.imageRegistry;

    }

    public Image getImage(final IProjectFacet facet, final boolean showDecorations) {

        final boolean isFixed = getFacetedProjectWorkingCopy().isFixedProjectFacet(facet);

        final String id = (isFixed && showDecorations ? "F:" : "f:") + facet.getId(); //$NON-NLS-1$ //$NON-NLS-2$

        Image image = getImageRegistry().get(id);

        if (image == null) {

            final IDecorationsProvider decprov = (IDecorationsProvider) facet.getAdapter(IDecorationsProvider.class);

            ImageDescriptor imgdesc = decprov.getIcon();

            if (isFixed && showDecorations) {

                imgdesc = new FixedFacetImageDescriptor(imgdesc);

            }

            getImageRegistry().put(id, imgdesc);

            image = getImageRegistry().get(id);

        }

        return image;

    }

    private void refresh() {

        // Somehow the checked state of nested items gets lost when a refresh

        // is performed, so we have to do this workaround.

        final Object[] checked = this.tableViewer.getCheckedElements();

        this.tableViewer.refresh();

        this.tableViewer.setCheckedElements(checked);

    }

    public boolean getShowToolTips() {

        return this.showToolTips;

    }

    public void setShowToolTips(final boolean showToolTips) {

        this.showToolTips = showToolTips;

    }

    private void addWorkingCopyListener(final IFacetedProjectListener listener,

            final IFacetedProjectEvent.Type... types) {

        this.fpjwc.addListener(listener, types);

        this.registeredWorkingCopyListeners.add(listener);

    }

    public IProjectFacet getSelectedProjectFacet() {

        final IProjectFacetVersion fv = getSelectedProjectFacetVersion();

        if (fv != null) {

            return fv.getProjectFacet();

        }

        return null;

    }

    public IProjectFacetVersion getSelectedProjectFacetVersion() {

        if (this.selection != null && this.selection instanceof IProjectFacetVersion) {

            return (IProjectFacetVersion) this.selection;

        }

        return null;

    }

    private IProjectFacetVersion getSelectedVersion(final IProjectFacet f) {

        final Set<IProjectFacetVersion> availableVersions = this.fpjwc.getAvailableVersions(f);

        if (availableVersions.isEmpty()) {

            throw new IllegalStateException();

        }

        IProjectFacetVersion selectedVersion = this.fpjwc.getProjectFacetVersion(f);

        if (selectedVersion == null) {

            selectedVersion = this.selectedVersions.get(f);

            if (selectedVersion == null) {

                selectedVersion = f.getDefaultVersion();

            }

            if (!availableVersions.contains(selectedVersion)) {

                selectedVersion = this.fpjwc.getHighestAvailableVersion(f);

            }

        }

        this.selectedVersions.put(f, selectedVersion);

        return selectedVersion;

    }

    private void handleSelectionChangedEvent() {

        Object selection = ((IStructuredSelection) this.tableViewer.getSelection()).getFirstElement();

        if (selection != null && selection instanceof IProjectFacet) {

            selection = getSelectedVersion((IProjectFacet) selection);

        }

        if (selection != this.selection) {

            this.selection = selection;

            notifySelectionChangedListeners();

        }

    }

    private void handleCheckStateChanged(final CheckStateChangedEvent event) {

        final Object el = event.getElement();

        final boolean checked = event.getChecked();

        final IProjectFacet f = (IProjectFacet) el;

        if (this.fpjwc.getFixedProjectFacets().contains(f)) {

            if (!checked) {

                this.tableViewer.setChecked(el, true);

                final String msg = MessageFormat

                        .format("Project facet {0} cannot be deselected. It is critical to the proper function of this project.",

                                f.getLabel());

                this.fixedFacetToolTip.setMessage(msg);

                final Point cursorLocation = getDisplay().getCursorLocation();

                this.fixedFacetToolTip.show(this.table.toControl(cursorLocation));

            }

            return;

        }

        if (checked) {

            this.fpjwc.addProjectFacet(getSelectedVersion(f));

        } else {

            this.fpjwc.removeProjectFacet(f);

        }

        this.fpjwc.setSelectedPreset(null);

    }

    private void handleMouseDownEvent(final Event event) {

        handleMouseDownEventHelper(event, this.table.getItems());

    }

    private boolean handleMouseDownEventHelper(final Event event, final TableItem[] items) {

        for (TableItem item : items) {

            if (item.getBounds(1).contains(event.x, event.y)) {

                final TableItem[] newSelection = new TableItem[] { item };

                if (!Arrays.equals(this.table.getSelection(), newSelection)) {

                    this.table.setSelection(new TableItem[] { item });

                    this.tableViewer.editElement(item.getData(), 1);

                }

                return true;

            }

        }

        return false;

    }

    private void handleDisposeEvent() {

        this.imageRegistry.dispose();

        for (IFacetedProjectListener listener : this.registeredWorkingCopyListeners) {

            this.fpjwc.removeListener(listener);

        }

        RuntimeManager.removeListener(this.runtimeLifecycleListener);

    }

    private void handleProjectFacetsChangedEvent(final IFacetedProjectEvent event) {

        if (!Thread.currentThread().equals(getDisplay().getThread())) {

            final Runnable uiRunnable = new Runnable() {

                public void run() {

                    handleProjectFacetsChangedEvent(event);

                }

            };

            getDisplay().asyncExec(uiRunnable);

            return;

        }

        if (event != null) {

            final IFacetedProjectWorkingCopy fpjwc = event.getWorkingCopy();

            final IProjectFacetsChangedEvent evt = (IProjectFacetsChangedEvent) event;

            for (IProjectFacetVersion fv : evt.getAllAffectedFacets()) {

                final IProjectFacet f = fv.getProjectFacet();

                final boolean checked = fpjwc.hasProjectFacet(fv);

                this.tableViewer.setChecked(f, checked);

                this.tableViewer.update(f, null);

            }

        } else {

            final List<IProjectFacet> facets = new ArrayList<IProjectFacet>();

            for (IProjectFacetVersion fv : this.fpjwc.getProjectFacets()) {

                facets.add(fv.getProjectFacet());

            }

            this.tableViewer.setCheckedElements(facets.toArray());

            this.tableViewer.update(this.fpjwc.getAvailableFacets().keySet().toArray(), null);

        }

    }

    private void handleValidationProblemsChangedEvent() {

        if (!Thread.currentThread().equals(getDisplay().getThread())) {

            final Runnable uiRunnable = new Runnable() {

                public void run() {

                    handleValidationProblemsChangedEvent();

                }

            };

            getDisplay().asyncExec(uiRunnable);

            return;

        }

        this.problemsView.refresh();

        if (getFilteredProblems().length == 0) {

            if (this.sform1.getMaximizedControl() == null) {

            }

        } else {

            if (this.sform1.getMaximizedControl() != null) {

                this.sform1.setMaximizedControl(null);

            }

        }

    }

    private void handleModelChangedEvent(final IFacetedProjectEvent event) {

        switch (event.getType()) {

        case FIXED_FACETS_CHANGED:

        case TARGETED_RUNTIMES_CHANGED: {

            final Runnable runnable = new Runnable() {

                public void run() {

                    refresh();

                }

            };

            runOnDisplayThread(getDisplay(), runnable);

            break;

        }

        }

    }

    private IStatus[] getFilteredProblems() {

        final IStatus[] unfiltered = this.fpjwc.validate().getChildren();

        boolean somethingToRemove = false;