/*
 * Copyright (c) 2004-2011 Marco Maccaferri and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Marco Maccaferri - initial API and implementation
 */

package org.eclipsetrader.ui.internal.charts;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferencePage;
import org.eclipse.nebula.widgets.cdatetime.CDT;
import org.eclipse.nebula.widgets.cdatetime.CDateTime;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Spinner;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipsetrader.ui.Util;
import org.eclipsetrader.ui.internal.UIActivator;

public class DefaultsPage extends PreferencePage implements IWorkbenchPreferencePage {

    Button useStartDate;
    CDateTime startDate;
    Button useYears;
    Spinner years;

    SimpleDateFormat prefsDateFormat = new SimpleDateFormat("yyyyMMdd");

    public DefaultsPage() {
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
     */
    @Override
    public void init(IWorkbench workbench) {
        setPreferenceStore(UIActivator.getDefault().getPreferenceStore());
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)
     */
    @Override
    protected Control createContents(Composite parent) {
        Composite content = new Composite(parent, SWT.NONE);
        GridLayout gridLayout = new GridLayout(2, false);
        gridLayout.verticalSpacing = convertVerticalDLUsToPixels(2);
        content.setLayout(gridLayout);

        Group group = new Group(content, SWT.NONE);
        group.setText("Initial backfill");
        group.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 1));
        gridLayout = new GridLayout(3, false);
        gridLayout.verticalSpacing = convertVerticalDLUsToPixels(2);
        group.setLayout(gridLayout);

        useStartDate = new Button(group, SWT.RADIO);
        useStartDate.setText("Start Date");
        startDate = new CDateTime(group, CDT.BORDER | CDT.DATE_SHORT | CDT.DROP_DOWN | CDT.TAB_FIELDS);
        startDate.setPattern(Util.getDateFormatPattern());
        startDate.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false, 2, 1));

        useYears = new Button(group, SWT.RADIO);
        useYears.setText("Last");
        years = new Spinner(group, SWT.BORDER);
        years.setValues(1, 1, 99999, 0, 1, 5);
        Label label = new Label(group, SWT.NONE);
        label.setText("year(s)");

        performDefaults();

        return content;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.PreferencePage#performDefaults()
     */
    @Override
    protected void performDefaults() {
        IPreferenceStore preferences = getPreferenceStore();

        int v = preferences.getInt(UIActivator.PREFS_INITIAL_BACKFILL_METHOD);
        useStartDate.setSelection(v == 0);
        useYears.setSelection(v == 1);

        String s = preferences.getString(UIActivator.PREFS_INITIAL_BACKFILL_START_DATE);
        if (!s.equals("")) {
            try {
                Date date = prefsDateFormat.parse(s);
                startDate.setSelection(date);
            } catch (ParseException e) {
                Status status = new Status(IStatus.ERROR, UIActivator.PLUGIN_ID, 0, "Error parsing start date " + s, e);
                UIActivator.log(status);
            }
        }

        years.setSelection(preferences.getInt(UIActivator.PREFS_INITIAL_BACKFILL_YEARS));

        super.performDefaults();
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.preference.PreferencePage#performOk()
     */
    @Override
    public boolean performOk() {
        IPreferenceStore preferences = getPreferenceStore();

        if (useStartDate.getSelection()) {
            preferences.setValue(UIActivator.PREFS_INITIAL_BACKFILL_METHOD, 0);
        }
        else if (useYears.getSelection()) {
            preferences.setValue(UIActivator.PREFS_INITIAL_BACKFILL_METHOD, 1);
        }

        if (startDate.getSelection() != null) {
            preferences.setValue(UIActivator.PREFS_INITIAL_BACKFILL_START_DATE, prefsDateFormat.format(startDate.getSelection()));
        }
        else {
            preferences.setValue(UIActivator.PREFS_INITIAL_BACKFILL_START_DATE, "");
        }

        preferences.setValue(UIActivator.PREFS_INITIAL_BACKFILL_YEARS, years.getSelection());

        return super.performOk();
    }
}