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package org.openide.text;

import java.io.IOException;

import javax.swing.event.UndoableEditEvent;

import javax.swing.event.UndoableEditListener;

import javax.swing.text.*;

import javax.swing.undo.CompoundEdit;

import javax.swing.undo.UndoableEdit;

import org.netbeans.junit.*;

import org.openide.awt.UndoRedo;

import org.openide.util.Exceptions;

/**

 * Emulating old UndoRedo manager deadlock.

 *

 * @author  Jaroslav Tulach

 */

public class UndoRedoWrappingCooperationTest extends NbTestCase implements CloneableEditorSupport.Env {

    static {

        System.setProperty("org.openide.windows.DummyWindowManager.VISIBLE", "false");

    }

    /** the support to work with */

    private CES support;

    // Env variables

    private String content = "Hello";

    private boolean valid = true;

    private boolean modified = false;

    /** if not null contains message why this document cannot be modified */

    private String cannotBeModified;

    private java.util.Date date = new java.util.Date ();

    private java.util.List/*<java.beans.PropertyChangeListener>*/ propL = new java.util.ArrayList ();

    private java.beans.VetoableChangeListener vetoL;

    /** Creates new TextTest */

    public UndoRedoWrappingCooperationTest (String s) {

        super(s);

    }

    protected javax.swing.text.EditorKit createEditorKit() {

        return new NbLikeEditorKit();

    }

    // Use these methods with the UndoRedoGroup patch

    CompoundEdit beginChunk(Document d) {

        // ur().beginUndoGroup();

        sendUndoableEdit(d, CloneableEditorSupport.BEGIN_COMIT_GROUP);

        return null;

    }

    void endChunk(Document d, CompoundEdit ce) {

        // ur().endUndoGroup();

        sendUndoableEdit(d, CloneableEditorSupport.END_COMIT_GROUP);

    }

    void sendUndoableEdit(Document d, UndoableEdit ue) {

        if(d instanceof AbstractDocument) {

            UndoableEditListener[] uels = ((AbstractDocument)d).getUndoableEditListeners();

            UndoableEditEvent ev = new UndoableEditEvent(d, ue);

            for(UndoableEditListener uel : uels) {

                uel.undoableEditHappened(ev);

            }

        }

    }

    // Use these methods with compound edit implementation

    // CompoundEdit beginChunk(Document d) {

    //     CompoundEdit ce = new CompoundEdit();

    //     support.getUndoRedo().undoableEditHappened

    //             (new UndoableEditEvent(d, ce));

    //     return ce;

    // }

    // void endChunk(Document d, CompoundEdit ce) {

    //     ce.end();

    // }

    UndoRedo.Manager ur() {

        return support.getUndoRedo();

    }

    protected void setUp () {

        support = new CES (this, org.openide.util.Lookup.EMPTY);

    }

    public void testTrivialChunk() throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        // same operations as testSingleChunk,

        // but don't test modified/canUndo/canRedo state

        CompoundEdit ce = beginChunk(d);

        d.insertString(d.getLength(), "a", null);

        d.insertString(d.getLength(), "b", null);

        endChunk(d, ce);

        assertEquals("data", "ab", d.getText(0, d.getLength()));

        ur().undo();

        assertEquals("after undo data", "", d.getText(0, d.getLength()));

        ur().redo();

        assertEquals("after redo data", "ab", d.getText(0, d.getLength()));

    }

    public void testSingleChunk() throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        assertFalse("initially: not modified", support.isModified());

        assertFalse("initially: no undo", ur().canUndo());

        assertFalse("initially: no redo", ur().canRedo());

        CompoundEdit ce = beginChunk(d);

        assertFalse("start chunk: not modified", support.isModified());

        assertFalse("start chunk: no undo", ur().canUndo());

        assertFalse("start chunk: no redo", ur().canRedo());

        d.insertString(d.getLength(), "a", null);

        assertTrue("insert: modified", support.isModified());

        assertTrue("insert: can undo", ur().canUndo());

        assertFalse("insert: no redo", ur().canRedo());

        d.insertString(d.getLength(), "b", null);

        endChunk(d, ce);

        assertEquals("chunk: data", "ab", d.getText(0, d.getLength()));

        assertTrue("endChunk: modified", support.isModified());

        assertTrue("endChunk: can undo", ur().canUndo());

        assertFalse("endChunk: no redo", ur().canRedo());

        ur().undo();

        assertEquals("after undo: data", "", d.getText(0, d.getLength()));

        assertFalse("undo: not modified", support.isModified());

        assertFalse("undo: no undo", ur().canUndo());

        assertTrue("undo: can redo", ur().canRedo());

        ur().redo();

        assertEquals("after redo: data", "ab", d.getText(0, d.getLength()));

        assertTrue("redo: modified", support.isModified());

        assertTrue("redo: can undo", ur().canUndo());

        assertFalse("redo: no redo", ur().canRedo());

    }

    public void testUndoWhileActiveChunk() throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        CompoundEdit ce = beginChunk(d);

        d.insertString(d.getLength(), "a", null);

        d.insertString(d.getLength(), "b", null);

        assertEquals("before undo: data", "ab", d.getText(0, d.getLength()));

        ur().undo();

        // These asserts assume that an undo in the middle of a chunk

        // is an undo on the whole chunk so far.

        // Different semantics could be defined, so that an undo inside

        // of a chunk affects the tiny pieces.

        assertEquals("after undo: data", "", d.getText(0, d.getLength()));

        assertFalse("after undo: not modified", support.isModified());

        assertFalse("after undo: no undo", ur().canUndo());

        assertTrue("after undo: can redo", ur().canRedo());

        // note still in the chunk.

        d.insertString(d.getLength(), "c", null);

        d.insertString(d.getLength(), "d", null);

        endChunk(d, ce);

        assertEquals("after endChunk: data", "cd", d.getText(0, d.getLength()));

        assertTrue("after endChunk: modified", support.isModified());

        assertTrue("after endChunk: can undo", ur().canUndo());

        assertFalse("after endChunk: no redo", ur().canRedo());

        ur().undo();

        assertEquals("undo after endChunk: data", "", d.getText(0, d.getLength()));

        assertFalse("undo after endChunk: not modified", support.isModified());

        assertFalse("undo after endChunk: no undo", ur().canUndo());

        assertTrue("undo after endChunk: can redo", ur().canRedo());

    }

    public void testSaveDocumentWhileActiveChunkCommon(boolean doFailCase) throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        CompoundEdit ce = beginChunk(d);

        d.insertString(d.getLength(), "a", null);

        d.insertString(d.getLength(), "b", null);

        support.saveDocument (); // creates a separate undoable chunk

        assertFalse("save: not modified", support.isModified());

        assertTrue("save: can undo", ur().canUndo());

        assertFalse("save: no redo", ur().canRedo());

        d.insertString(d.getLength(), "c", null);

        d.insertString(d.getLength(), "d", null);

        endChunk(d, ce);

        assertEquals("insert, after save: data", "abcd", d.getText(0, d.getLength()));

        assertTrue("insert, after save: modified", support.isModified());

        assertTrue("insert, after save: can undo", ur().canUndo());

        assertFalse("insert, after save: no redo", ur().canRedo());

        ur().undo();

        assertEquals("undo, at save: data", "ab", d.getText(0, d.getLength()));

        assertFalse("undo, at save: not modified", support.isModified());

        assertTrue("undo, at save: can undo", ur().canUndo());

        assertTrue("undo, at save: can redo", ur().canRedo());

        ur().undo();

        assertEquals("undo, before save: data", "", d.getText(0, d.getLength()));

        if(doFailCase) {

            // ****************************************************************

            // CES BUG???

            assertTrue("undo, before save: modified", support.isModified());

            // ****************************************************************

        }

        assertFalse("undo, before save: can undo", ur().canUndo());

        assertTrue("undo, before save: can redo", ur().canRedo());

        ur().redo();

        assertEquals("redo, at save: data", "ab", d.getText(0, d.getLength()));

        assertFalse("redo, at save: not modified", support.isModified());

        assertTrue("redo, at save: can undo", ur().canUndo());

        assertTrue("redo, at save: can redo", ur().canRedo());

    }

    public void testSaveDocumentWhileActiveChunk() throws Exception {

        testSaveDocumentWhileActiveChunkCommon(false);

    }

    // This fails, below is "testSaveDocumentErrorCase" without chunking,

    // it also fails.

    // public void testSaveDocumentWhileActiveChunkErroCase() throws Exception {

    //     testSaveDocumentWhileActiveChunkCommon(true);

    // }

    public void testNestedChunks() throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        CompoundEdit ce1 = beginChunk(d);

        d.insertString(d.getLength(), "a", null);

        d.insertString(d.getLength(), "b", null);

        CompoundEdit ce2 = beginChunk(d); // creates a separate undoable chunk

        d.insertString(d.getLength(), "c", null);

        d.insertString(d.getLength(), "d", null);

        endChunk(d, ce1);

        d.insertString(d.getLength(), "e", null);

        d.insertString(d.getLength(), "f", null);

        endChunk(d, ce2);

        assertEquals("data", "abcdef", d.getText(0, d.getLength()));

        // following fails if nesting not supported

        ur().undo();

        assertEquals("undo1", "abcd", d.getText(0, d.getLength()));

        ur().undo();

        assertEquals("undo2", "ab", d.getText(0, d.getLength()));

        ur().undo();

        assertEquals("undo3", "", d.getText(0, d.getLength()));

    }

    // This is testSaveDocumentWhileActiveChunk WITHOUT chunking

    public void testSaveDocumentCommon(boolean doFailCase) throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        d.insertString(d.getLength(), "a", null);

        support.saveDocument (); // creates a separate undoable chunk

        assertFalse("save: not modified", support.isModified());

        assertTrue("save: can undo", ur().canUndo());

        assertFalse("save: no redo", ur().canRedo());

        d.insertString(d.getLength(), "b", null);

        assertEquals("insert, after save: data", "ab", d.getText(0, d.getLength()));

        assertTrue("insert, after save: modified", support.isModified());

        assertTrue("insert, after save: can undo", ur().canUndo());

        assertFalse("insert, after save: no redo", ur().canRedo());

        ur().undo();

        assertEquals("undo, at save: data", "a", d.getText(0, d.getLength()));

        assertFalse("undo, at save: not modified", support.isModified());

        assertTrue("undo, at save: can undo", ur().canUndo());

        assertTrue("undo, at save: can redo", ur().canRedo());

        ur().undo();

        assertEquals("undo, before save: data", "", d.getText(0, d.getLength()));

        if(doFailCase) {

            // ****************************************************************

            // CES BUG???

            assertTrue("undo, before save: modified", support.isModified());

            // ****************************************************************

        }

        assertFalse("undo, before save: can undo", ur().canUndo());

        assertTrue("undo, before save: can redo", ur().canRedo());

        ur().redo();

        assertEquals("redo, at save: data", "a", d.getText(0, d.getLength()));

        assertFalse("redo, at save: not modified", support.isModified());

        assertTrue("redo, at save: can undo", ur().canUndo());

        assertTrue("redo, at save: can redo", ur().canRedo());

    }

    public void testSaveDocument() throws Exception {

        testSaveDocumentCommon(false);

    }

    public void testSaveDocumentErrorCase() throws Exception {

        testSaveDocumentCommon(true);

    }

    public void testRedoAfterSave() throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        d.insertString(d.getLength(), "a", null);

        d.insertString(d.getLength(), "b", null);

        assertEquals("insert: data", "ab", d.getText(0, d.getLength()));

        assertTrue("insert: modified", support.isModified());

        assertTrue("insert: can undo", ur().canUndo());

        assertFalse("insert: no redo", ur().canRedo());

        ur().undo();

        assertEquals("undo: data", "a", d.getText(0, d.getLength()));

        assertTrue("undo: modified", support.isModified());

        assertTrue("undo: can undo", ur().canUndo());

        assertTrue("undo: can redo", ur().canRedo());

        support.saveDocument ();

        assertFalse("save: not modified", support.isModified());

        assertTrue("save: can undo", ur().canUndo());

        assertTrue("save: can redo", ur().canRedo());

        ur().redo();

        assertEquals("redo: data", "ab", d.getText(0, d.getLength()));

        assertTrue("redo: modified", support.isModified());

        assertTrue("redo: can undo", ur().canUndo());

        assertFalse("redo: no redo", ur().canRedo());

    }

    //

    // Implementation of the CloneableEditorSupport.Env

    //

    public synchronized void addPropertyChangeListener(java.beans.PropertyChangeListener l) {

        propL.add (l);

    }    

    public synchronized void removePropertyChangeListener(java.beans.PropertyChangeListener l) {

        propL.remove (l);

    }

    public synchronized void addVetoableChangeListener(java.beans.VetoableChangeListener l) {

        assertNull ("This is the first veto listener", vetoL);

        vetoL = l;

    }

    public void removeVetoableChangeListener(java.beans.VetoableChangeListener l) {

        assertEquals ("Removing the right veto one", vetoL, l);

        vetoL = null;

    }

    public org.openide.windows.CloneableOpenSupport findCloneableOpenSupport() {

        return support;

    }

    public String getMimeType() {

        return "text/plain";

    }

    public java.util.Date getTime() {

        return date;

    }

    public java.io.InputStream inputStream() throws java.io.IOException {

        return new java.io.ByteArrayInputStream (content.getBytes ());

    }

    public java.io.OutputStream outputStream() throws java.io.IOException {

        class ContentStream extends java.io.ByteArrayOutputStream {

            public void close () throws java.io.IOException {

                super.close ();

                content = new String (toByteArray ());

            }

        }

        return new ContentStream ();

    }

    public boolean isValid() {

        return valid;

    }

    public boolean isModified() {

        return modified;

    }

    public void markModified() throws java.io.IOException {

        if (cannotBeModified != null) {

            IOException e = new IOException ();

            Exceptions.attachLocalizedMessage(e, cannotBeModified);

            throw e;

        }

        modified = true;

    }

    public void unmarkModified() {

        modified = false;

    }

    /** Implementation of the CES */

    private final class CES extends CloneableEditorSupport {

        public boolean plain;

        public CES (Env env, org.openide.util.Lookup l) {

            super (env, l);

        }

        protected String messageName() {

            return "Name";

        }

        protected String messageOpened() {

            return "Opened";

        }

        protected String messageOpening() {

            return "Opening";

        }

        protected String messageSave() {

            return "Save";

        }

        protected String messageToolTip() {

            return "ToolTip";

        }        

        protected javax.swing.text.EditorKit createEditorKit() {

            if (plain) {

                return super.createEditorKit ();

            } else {

                return UndoRedoWrappingCooperationTest.this.createEditorKit ();

            }

        }

    } // end of CES

}