//   Copyright 2012 Georg-August-Universität Göttingen, Germany
//
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.

package de.ugoe.cs.autoquest.ui.swt;

import org.eclipse.swt.widgets.Dialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Spinner;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.layout.GridData;

import de.ugoe.cs.util.console.CommandExecuter;

import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;

public class GenerateSequencesDialog extends Dialog {

    private String processName;

    protected Button btnNumberAll;
    protected Button btnLengthAll;
    protected Spinner numberSpinner;
    protected Spinner iterationsSpinner;
    protected Spinner minLengthSpinner;
    protected Spinner maxLengthSpinner;

    protected Shell shlGenerateSequences;
    private Text sequencesNameText;

    /**
     * Create the dialog.
     * 
     * @param parent
     * @param style
     */
    public GenerateSequencesDialog(Shell parent, int style) {
        super(parent, style);
        setText("SWT Dialog");
    }

    /**
     * Open the dialog.
     */
    public void open() {
        createContents();
        shlGenerateSequences.open();
        shlGenerateSequences.layout();
        Display display = getParent().getDisplay();
        while (!shlGenerateSequences.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
    }

    /**
     * Create contents of the dialog.
     */
    private void createContents() {
        shlGenerateSequences = new Shell(getParent(), SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
        shlGenerateSequences.setSize(201, 303);
        shlGenerateSequences.setText("Generate Sequences");
        shlGenerateSequences.setLayout(new GridLayout(2, false));

        Group group = new Group(shlGenerateSequences, SWT.NONE);
        group.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1));
        group.setText("Name");
        group.setLayout(new GridLayout(1, false));

        sequencesNameText = new Text(group, SWT.BORDER);
        sequencesNameText.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));

        Group grpNumber = new Group(shlGenerateSequences, SWT.NONE);
        grpNumber.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 1));
        grpNumber.setText("Number");
        grpNumber.setLayout(new GridLayout(2, false));

        numberSpinner = new Spinner(grpNumber, SWT.BORDER);
        numberSpinner.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
        numberSpinner.setMinimum(1);
        numberSpinner.setMaximum(Integer.MAX_VALUE);

        btnNumberAll = new Button(grpNumber, SWT.CHECK);
        btnNumberAll.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                numberSpinner.setEnabled(!btnNumberAll.getSelection());
                btnLengthAll.setEnabled(!btnNumberAll.getSelection());
                iterationsSpinner.setEnabled(!btnNumberAll.getSelection());
            }
        });
        btnNumberAll.setText("All");

        Group grpIterations = new Group(shlGenerateSequences, SWT.NONE);
        grpIterations.setLayout(new GridLayout(1, false));
        grpIterations.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1));
        grpIterations.setText("Iterations");

        iterationsSpinner = new Spinner(grpIterations, SWT.BORDER);
        iterationsSpinner.setMinimum(1);
        iterationsSpinner.setMaximum(Integer.MAX_VALUE);
        iterationsSpinner.setSelection(100000);
        iterationsSpinner.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));

        Group grpLength = new Group(shlGenerateSequences, SWT.NONE);
        grpLength.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 2, 1));
        grpLength.setText("Length");
        grpLength.setLayout(new GridLayout(4, false));

        btnLengthAll = new Button(grpLength, SWT.CHECK);
        btnLengthAll.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                minLengthSpinner.setEnabled(!btnLengthAll.getSelection());
                maxLengthSpinner.setEnabled(!btnLengthAll.getSelection());
            }
        });
        btnLengthAll.setText("All");
        new Label(grpLength, SWT.NONE);
        new Label(grpLength, SWT.NONE);
        new Label(grpLength, SWT.NONE);

        Label label = new Label(grpLength, SWT.NONE);
        label.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 1, 1));
        label.setText("Min.");

        minLengthSpinner = new Spinner(grpLength, SWT.BORDER);
        minLengthSpinner.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
        minLengthSpinner.setMinimum(1);

        Label label_1 = new Label(grpLength, SWT.NONE);
        label_1.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, true, 1, 1));
        label_1.setText("Max.");

        maxLengthSpinner = new Spinner(grpLength, SWT.BORDER);
        maxLengthSpinner.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));
        maxLengthSpinner.setToolTipText("0 means no limitations");
        maxLengthSpinner.setMinimum(1);
        
        Button btnGenerate  = new Button(shlGenerateSequences, SWT.NONE);
        btnGenerate.setText("Generate!");
        btnGenerate.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                if ("".equals(sequencesNameText.getText())) {
                    MessageBox messageBox = new MessageBox(shlGenerateSequences, SWT.ERROR);
                    messageBox.setText("Error");
                    messageBox.setMessage("Sequences name not defined!");
                    messageBox.open();
                    return;
                }
                String sequencesName = sequencesNameText.getText();
                int number = numberSpinner.getSelection();
                int minLength = minLengthSpinner.getSelection();
                int maxLength = maxLengthSpinner.getSelection();
                int maxIter = iterationsSpinner.getSelection();
                if (maxIter <= number) {
                    maxIter = number;
                }
                String command = "";
                if (btnNumberAll.getSelection()) {
                    if (minLength > maxLength) {
                        MessageBox messageBox = new MessageBox(shlGenerateSequences, SWT.ERROR);
                        messageBox.setText("Error");
                        messageBox
                            .setMessage("Min. length must be smaller than or equal to max. length!");
                        messageBox.open();
                        return;
                    }
                    command =
                        "generateFixedLengthSequences " + processName + " " + sequencesName + " " +
                            minLength + " " + maxLength + " true";
                }
                else {
                    command =
                        "generateRandomSequences " + processName + " " + sequencesName + " " +
                            number + " " + maxIter;
                    if (!btnLengthAll.getSelection()) {
                        if (minLength > maxLength) {
                            MessageBox messageBox = new MessageBox(shlGenerateSequences, SWT.ERROR);
                            messageBox.setText("Error");
                            messageBox
                                .setMessage("Min. length must be smaller than or equal to max. length!");
                            messageBox.open();
                            return;
                        }
                        command += " " + minLength + " " + maxLength;
                    }
                }
                CommandExecuter.getInstance().exec(command);
                shlGenerateSequences.dispose();
            }
        });

        Button btnAbort = new Button(shlGenerateSequences, SWT.NONE);
        btnAbort.setText("Abort");
        btnAbort.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                shlGenerateSequences.dispose();
            }
        });

    }

    public void setProcessName(String name) {
        this.processName = name;
    }
}
