package timeflow.app.ui.filter;

import timeflow.util.*;

import javax.swing.*;

import timeflow.data.db.*;
import timeflow.data.db.filter.*;
import timeflow.model.ModelPanel;

import java.awt.*;
import java.awt.event.*;

public class FilterCategoryPanel extends FilterDefinitionPanel
{

        public JList dataList = new JList();
        Field field;

        public FilterCategoryPanel(final Field field, final ModelPanel parent)
        {
                this(field.getName(), field, parent);
        }

        public FilterCategoryPanel(String title, final Field field, final ModelPanel parent)
        {
                this.field = field;
                setLayout(new BorderLayout());
                setBackground(Color.white);
                setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 5));

                add(new FilterTitle(title, field, parent, true), BorderLayout.NORTH);


                JScrollPane scroller = new JScrollPane(dataList);
                scroller.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
                scroller.setBorder(null);
                add(scroller, BorderLayout.CENTER);
                dataList.setForeground(Color.darkGray);
                dataList.setSelectionForeground(Color.black);
                dataList.setSelectionBackground(new Color(220, 235, 255));
                dataList.setFont(parent.getModel().getDisplay().small());
                scroller.getVerticalScrollBar().setBackground(Color.white);


                // ok, the following is ugly code to insert a new mouselistener
                // that lets the user deselect items when they are clicked.
                // i tried a bunch of stuff but this is all that would work--
                // and searching the web yielded only solutions similar to this.
                // also, there's a weird dance with consuming/not consuming events
                // that is designed to allow a certain kind of multi-selection behavior
                // with the mouse, while letting you scroll through items one at a time
                // with the keyboard. this was the product of a long series of
                // conversations with target users.
                MouseListener[] old = dataList.getMouseListeners();
                for (MouseListener m : old)
                {
                        dataList.removeMouseListener(m);
                }

                dataList.addMouseListener(new MouseAdapter()
                {

                        public void mousePressed(MouseEvent e)
                        {
                                if (e.isControlDown() || e.isMetaDown() || e.isShiftDown())
                                {
                                        return;
                                }
                                final int index = dataList.locationToIndex(e.getPoint());
                                if (dataList.isSelectedIndex(index))
                                {
                                        SwingUtilities.invokeLater(new Runnable()
                                        {

                                                public void run()
                                                {
                                                        dataList.removeSelectionInterval(index, index);

                                                }
                                        });
                                        e.consume();
                                } else
                                {
                                        SwingUtilities.invokeLater(new Runnable()
                                        {

                                                public void run()
                                                {
                                                        dataList.addSelectionInterval(index, index);

                                                }
                                        });
                                        e.consume();
                                }
                        }
                });

                for (MouseListener m : old)
                {
                        dataList.addMouseListener(m);
                }

                dataList.setCellRenderer(new DefaultListCellRenderer()
                {

                        @Override
                        public Component getListCellRendererComponent(JList list,
                                Object value, int index, boolean isSelected,
                                boolean cellHasFocus)
                        {
                                Component c = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
                                if (field == parent.getModel().getColorField())
                                {
                                        String text = value.toString();
                                        int n = text.lastIndexOf('-');
                                        if (n > 1)
                                        {
                                                text = text.substring(0, n - 1);
                                        }
                                        c.setForeground(parent.getModel().getDisplay().makeColor(text));
                                }
                                return c;
                        }
                });

        }

        public void setData(Bag<String> data)
        {
                dataList.removeAll();
                java.util.List<String> items = data.list();
                String[] s = (String[]) items.toArray(new String[0]);
                for (int i = 0; i < s.length; i++)
                {
                        int num = data.num(s[i]);
                        if (s[i] == null || s[i].length() == 0)
                        {
                                s[i] = "(missing)";
                        }
                        s[i] += " - " + num;
                }
                dataList.setListData(s);
        }

        public Dimension getPreferredSize()
        {
                return new Dimension(200, 200);
        }

        @Override
        public ActFilter defineFilter()
        {
                Object[] o = dataList.getSelectedValues();
                if (o == null || o.length == 0)
                {
                        return null;
                }

                int n = o.length;
                String[] s = new String[n];
                for (int i = 0; i < n; i++)
                {
                        String w = (String) o[i];
                        int m = w.lastIndexOf('-');
                        s[i] = w.substring(0, m - 1);
                        if ("(missing)".equals(s[i]))
                        {
                                s[i] = "";
                        }
                }

                if (s.length == 1)
                {
                        return new FieldValueFilter(field, s[0]);
                }
                FieldValueSetFilter f = new FieldValueSetFilter(field);
                for (int i = 0; i < s.length; i++)
                {
                        f.addValue(s[i]);
                }
                return f;
        }

        @Override
        public void clearFilter()
        {
                dataList.clearSelection();
        }
}