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package org.netbeans.lib.profiler.ui.swing;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import javax.swing.RowSorter;
import javax.swing.SortOrder;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;

/**
 * TableRowSorter for single-column sorting with default SortOrders for each column. 
 *
 * @author Jiri Sedlacek
 */
class ProfilerRowSorter extends TableRowSorter {
    
    private SortOrder defaultSortOrder = SortOrder.ASCENDING;
    private Map<Integer, SortOrder> defaultSortOrders;
    
    
    // --- Package-private constructor -----------------------------------------
    
    ProfilerRowSorter(TableModel model) {
        super(model);
    }
    
    // --- Public API implementation -------------------------------------------
    
    public void setSortKeys(List newKeys) {
        RowSorter.SortKey oldKey = getSortKey();
        RowSorter.SortKey newKey = (RowSorter.SortKey)newKeys.get(0);
        
        if (oldKey == null || oldKey.getColumn() != newKey.getColumn()) {
            // Use defined initial SortOrder for a newly sorted column
            setSortColumn(newKey.getColumn());
        } else {
            setSortKeysImpl(newKeys);
        }
    }
    
    protected void setSortKeysImpl(List newKeys) {
        super.setSortKeys(newKeys);
    }
    
    void setSortColumn(int column) {
        setSortColumn(column, getDefaultSortOrder(column));
    }
    
    void setSortColumn(int column, SortOrder order) {
        setSortKey(new RowSorter.SortKey(column, order));
    }
    
    void setSortKey(RowSorter.SortKey key) {
        setSortKeysImpl(Arrays.asList(key));
    }
    
    int getSortColumn() {
        RowSorter.SortKey key = getSortKey();
        return key == null ? -1 : key.getColumn();
    }
    
    SortOrder getSortOrder() {
        RowSorter.SortKey key = getSortKey();
        return key == null ? SortOrder.UNSORTED : key.getSortOrder();
    }
    
    RowSorter.SortKey getSortKey() {
        List<? extends RowSorter.SortKey> keys = getSortKeys();
        return keys.isEmpty() ? null : keys.get(0);
    }
    
    
    void setDefaultSortOrder(SortOrder sortOrder) {
        defaultSortOrder = sortOrder;
    }
    
    void setDefaultSortOrder(int column, SortOrder sortOrder) {
        if (defaultSortOrders == null) defaultSortOrders = new HashMap();
        defaultSortOrders.put(column, sortOrder);
    }
    
    SortOrder getDefaultSortOrder(int column) {
        SortOrder order = defaultSortOrders == null ? null :
                          defaultSortOrders.get(column);
        return order == null ? defaultSortOrder : order;
    }
    
    // --- Persistence ---------------------------------------------------------
    
    private static final String SORT_COLUMN_KEY = "ProfilerRowSorter.SortColumn"; // NOI18N
    private static final String SORT_ORDER_KEY = "ProfilerRowSorter.SortOrder"; // NOI18N
    
    void loadFromStorage(Properties properties, ProfilerTable table) {
        String columnS = properties.getProperty(SORT_COLUMN_KEY);
        String orderS = properties.getProperty(SORT_ORDER_KEY);
        if (columnS != null) {
            try {
                int column = Integer.parseInt(columnS);
                SortOrder order = getSortOrder(orderS);
                if (SortOrder.UNSORTED.equals(order)) order = getDefaultSortOrder(column);
                setSortColumn(column, order);
            } catch (NumberFormatException e) {
                // Reset sorting? Set default column?
            }
        } else {
            // Reset sorting? Set default column?
        }
    }
    
    void saveToStorage(Properties properties, ProfilerTable table) {
        RowSorter.SortKey key = getSortKey();
        if (key == null) {
            properties.remove(SORT_COLUMN_KEY);
            properties.remove(SORT_ORDER_KEY);
        } else {
            int column = key.getColumn();
            SortOrder order = key.getSortOrder();
            properties.setProperty(SORT_COLUMN_KEY, Integer.toString(column));
            properties.setProperty(SORT_ORDER_KEY, order.toString());
        }
    }
    
    private SortOrder getSortOrder(String sortOrder) {
        if (SortOrder.ASCENDING.toString().equals(sortOrder)) return SortOrder.ASCENDING;
        else if (SortOrder.DESCENDING.toString().equals(sortOrder)) return SortOrder.DESCENDING;
        else return SortOrder.UNSORTED;
    }
    
}
