/**
 * Copyright (C) 2015 Valkyrie RCP
 *
 * 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 org.valkyriercp.widget.table.glazedlists;

import ca.odell.glazedlists.GlazedLists;
import ca.odell.glazedlists.gui.AdvancedTableFormat;
import ca.odell.glazedlists.gui.TableFormat;
import ca.odell.glazedlists.gui.WritableTableFormat;
import org.valkyriercp.widget.table.TableDescription;

import java.util.Comparator;

/**
 * GlazedListsSupport
 */
public class GlazedListsSupport
{
    interface AdvancedWritableTableFormat extends AdvancedTableFormat, WritableTableFormat
    {
    }

    private static Comparator lowerCaseStringComparator = null;

    public static String[] makeFilterProperties(TableDescription desc)
    {
        return desc.getPropertiesInTextFilter();
    }

    /**
     * Conversion of RCP TableDescription to GlazedLists TableFormat
     *
     * @param desc
     * @return AdvancedWritableTableFormat
     */
    public static TableFormat makeTableFormat(final TableDescription desc)
    {
        return new AdvancedWritableTableFormat()
        {
            public Class getColumnClass(int i)
            {
                return desc.getType(i);
            }

            public Comparator getColumnComparator(int i)
            {
                Comparator comp = desc.getColumnComparator(i);
                if (comp != null)
                    return comp;

                Class type = getColumnClass(i);
                if (Boolean.class.isAssignableFrom(type) || Boolean.TYPE.isAssignableFrom(type))
                    return GlazedLists.booleanComparator();
                else if (String.class.isAssignableFrom(type))
                    return getLowerCaseStringComparator();
                else if(Comparable.class.isAssignableFrom(type))
                    return GlazedLists.comparableComparator();
                else
                    return null;
            }

            public int getColumnCount()
            {
                return desc.getColumnCount();
            }

            public String getColumnName(int i)
            {
                return desc.getHeader(i);
            }

            public Object getColumnValue(Object obj, int i)
            {
                return desc.getValue(obj, i);
            }

            public boolean isEditable(Object baseObject, int column)
            {
                return desc.getColumnEditor(column) != null;
            }

            public Object setColumnValue(Object baseObject, Object editedValue, int column)
            {
                desc.setValue(baseObject, column, editedValue);
                return baseObject;
            }
        };
    }

    public static Comparator getLowerCaseStringComparator()
    {
        if (lowerCaseStringComparator == null)
            lowerCaseStringComparator = createLowerCaseStringComparator();
        return lowerCaseStringComparator;
    }

    private static Comparator createLowerCaseStringComparator()
    {
        return new Comparator()
        {
            public int compare(Object o1, Object o2)
            {
                String str1 = (String) o1;
                String str2 = (String) o2;
                if (str1 == null)
                {
                    if (str2 == null)
                        return 0;
                    return -1;
                }
                else if (str2 == null)
                {
                    return 1;
                }

                return str1.toLowerCase().compareTo(str2.toLowerCase());
            }
        };
    }
}