package com.vci.client.ui.swing.components.table;

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;

/**
 * 
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2012</p>
 * <p>Company: VCI</p>
 * @author xchao
 * @time 2012-5-10
 * @version 1.0
 */
@SuppressWarnings("rawtypes")
public class VCIJTableSorter extends AbstractTableModel {

    /**
     * 
     */
    private static final long serialVersionUID = 2327913765178251932L;

    protected TableModel tableModel;
    protected JTable table;

    public static final int DESCENDING = -1;
    public static final int NOT_SORTED = 0;
    public static final int ASCENDING = 1;

    private static Directive EMPTY_DIRECTIVE = new Directive(-1, NOT_SORTED);

	public static final Comparator COMPARABLE_COMAPRATOR = new Comparator() {
        @SuppressWarnings("unchecked")
		public int compare(Object o1, Object o2) {
        	// update by xchao 2013.11.21 begin
            // 按照数据值（o1、o2）实际的基元类型（Integer\Floag\Double\String\Byte\Char等）
        	// 已实现的Comparable.compareTo(o1,o2)执行逻辑来排序
        	// 以支持数据列存储是数值时，能按数值大小来排序
        	if(!o1.getClass().getName().equals(o2.getClass().getName())){
        		return LEXICAL_COMPARATOR.compare(o1, o2);
        	}
        	return ((Comparable) o1).compareTo((Comparable) o2);
            // old
            // return o1.toString().compareTo(o2.toString());
            // update by xchao 2013.11.21 end
        }
    };
    public static final Comparator LEXICAL_COMPARATOR = new Comparator() {
        public int compare(Object o1, Object o2) {
            return o1.toString().compareTo(o2.toString());
        }
    };
    
    /***
     * 得到TypeTableModel中对应的顺序
     */
    public int[] getSelectTypeTableModelRows(int[] rows) {
    	int count = rows.length;
    	int[] newRow=new int[count];
    	for (int i = 0; i < count; i++) {
    		newRow[i] = modelIndex(rows[i]);
    	}
    	return newRow;
    }
    private Row[] viewToModel;
    private int[] modelToView;

    private JTableHeader tableHeader;
    private MouseListener mouseListener;
    private TableModelListener tableModelListener;
    private Map columnComparators = new HashMap();
    private List sortingColumns = new ArrayList();

    public VCIJTableSorter() {
    	super();
        this.mouseListener = new MouseHandler();
        this.tableModelListener = new TableModelHandler();
    }

    public VCIJTableSorter(TableModel tableModel) {
        this();
        setTableModel(tableModel);
    }
    
    public VCIJTableSorter(TableModel tableModel, JTable table) {
        this();
        this.table = table;
        setTableModel(tableModel);
    }

    public VCIJTableSorter(TableModel tableModel, JTableHeader tableHeader) {
        this();
        setTableHeader(tableHeader);
        setTableModel(tableModel);
    }

    private void clearSortingState() {
        viewToModel = null;
        modelToView = null;
    }

    public TableModel getTableModel() {
        return tableModel;
    }

    public void setTableModel(TableModel tableModel) {
        if (this.tableModel != null) {
            this.tableModel.removeTableModelListener(tableModelListener);
        }

        this.tableModel = tableModel;
        if (this.tableModel != null) {
            this.tableModel.addTableModelListener(tableModelListener);
        }

        clearSortingState();
        fireTableStructureChanged();
    }

    public JTableHeader getTableHeader() {
        return tableHeader;
    }

    public void setTableHeader(JTableHeader tableHeader) {
        if (this.tableHeader != null) {
            this.tableHeader.removeMouseListener(mouseListener);
            TableCellRenderer defaultRenderer = this.tableHeader.getDefaultRenderer();
            if (defaultRenderer instanceof SortableHeaderRenderer) {
                this.tableHeader.setDefaultRenderer(((SortableHeaderRenderer) defaultRenderer).tableCellRenderer);
            }
        }
        this.tableHeader = tableHeader;
        if (this.tableHeader != null) {
            this.tableHeader.addMouseListener(mouseListener);
            this.tableHeader.setDefaultRenderer(
                    new SortableHeaderRenderer(this.tableHeader.getDefaultRenderer()));
        }
    }

    public boolean isSorting() {
        return sortingColumns.size() != 0;
    }

    private Directive getDirective(int column) {
        for (int i = 0; i < sortingColumns.size(); i++) {
            Directive directive = (Directive)sortingColumns.get(i);
            if (directive.column == column) {
                return directive;
            }
        }
        return EMPTY_DIRECTIVE;
    }

    public int getSortingStatus(int column) {
        return getDirective(column).direction;
    }

    private void sortingStatusChanged() {
        clearSortingState();
        fireTableDataChanged();
        if (tableHeader != null) {
            tableHeader.repaint();
        }
    }

	@SuppressWarnings("unchecked")
	public void setSortingStatus(int column, int status) {
        Directive directive = getDirective(column);
        if (directive != EMPTY_DIRECTIVE) {
            sortingColumns.remove(directive);
        }
        if (status != NOT_SORTED) {
            sortingColumns.add(new Directive(column, status));
        }
        sortingStatusChanged();
    }

    protected Icon getHeaderRendererIcon(int column, int size) {
        Directive directive = getDirective(column);
        if (directive == EMPTY_DIRECTIVE) {
            return null;
        }
        return new Arrow(directive.direction == DESCENDING, size, sortingColumns.indexOf(directive));
    }

    private void cancelSorting() {
        sortingColumns.clear();
        sortingStatusChanged();
    }

    @SuppressWarnings("unchecked")
	public void setColumnComparator(Class type, Comparator comparator) {
        if (comparator == null) {
            columnComparators.remove(type);
        } else {
            columnComparators.put(type, comparator);
        }
    }

    protected Comparator getComparator(int column) {
    	if (table != null && table.isEditing()) {
    		table.getCellEditor().stopCellEditing();
    	}
        Class columnType = tableModel.getColumnClass(column);
        Comparator comparator = (Comparator) columnComparators.get(columnType);
        if (comparator != null) {
            return comparator;
        }
        if (Comparable.class.isAssignableFrom(columnType)) {
            return COMPARABLE_COMAPRATOR;
        }
        return LEXICAL_COMPARATOR;
    }

    private Row[] getViewToModel() {
        if (viewToModel == null) {
            int tableModelRowCount = tableModel.getRowCount();
            viewToModel = new Row[tableModelRowCount];
            for (int row = 0; row < tableModelRowCount; row++) {
                viewToModel[row] = new Row(row);
            }

            if (isSorting()) {
                Arrays.sort(viewToModel);
            }
        }
        return viewToModel;
    }

    public int modelIndex(int viewIndex) {
    	Row[] rows = getViewToModel();
    	if(viewIndex < rows.length){
    		return rows[viewIndex].modelIndex;
    	} else {
    		return 0;
    	}
    }

    private int[] getModelToView() {
        if (modelToView == null) {
            int n = getViewToModel().length;
            modelToView = new int[n];
            for (int i = 0; i < n; i++) {
                modelToView[modelIndex(i)] = i;
            }
        }
        return modelToView;
    }

    // TableModel interface methods 

    public int getRowCount() {
        return (tableModel == null) ? 0 : tableModel.getRowCount();
    }

    public int getColumnCount() {
        return (tableModel == null) ? 0 : tableModel.getColumnCount();
    }

    public String getColumnName(int column) {
        return tableModel.getColumnName(column);
    }

    public Class<?> getColumnClass(int column) {
        return tableModel.getColumnClass(column);
    }

    public boolean isCellEditable(int row, int column) {
        return tableModel.isCellEditable(modelIndex(row), column);
    }

    public Object getValueAt(int row, int column) {
        return tableModel.getValueAt(modelIndex(row), column);
    }

    public void setValueAt(Object aValue, int row, int column) {
        tableModel.setValueAt(aValue, modelIndex(row), column);
    }

    // Helper classes
    
    private class Row implements Comparable {
        private int modelIndex;

        public Row(int index) {
            this.modelIndex = index;
        }

        @SuppressWarnings("unchecked")
		public int compareTo(Object o) {
            int row1 = modelIndex;
            int row2 = ((Row) o).modelIndex;

            for (Iterator it = sortingColumns.iterator(); it.hasNext();) {
                Directive directive = (Directive) it.next();
                int column = directive.column;
                Object o1 = tableModel.getValueAt(row1, column);
                Object o2 = tableModel.getValueAt(row2, column);

                int comparison = 0;
                // Define null less than everything, except null.
                if (o1 == null && o2 == null) {
                    comparison = 0;
                } else if (o1 == null) {
                    comparison = -1;
                } else if (o2 == null) {
                    comparison = 1;
                } else {
                    comparison = getComparator(column).compare(o1, o2);
                }
                if (comparison != 0) {
                    return directive.direction == DESCENDING ? -comparison : comparison;
                }
            }
            return 0;
        }
    }

    private class TableModelHandler implements TableModelListener {
        public void tableChanged(TableModelEvent e) {
            // If we're not sorting by anything, just pass the event along.             
            if (!isSorting()) {
                clearSortingState();
                fireTableChanged(e);
                return;
            }
                
            // If the table structure has changed, cancel the sorting; the             
            // sorting columns may have been either moved or deleted from             
            // the model. 
            if (e.getFirstRow() == TableModelEvent.HEADER_ROW) {
                cancelSorting();
                fireTableChanged(e);
                return;
            }

            // We can map a cell event through to the view without widening             
            // when the following conditions apply: 
            // 
            // a) all the changes are on one row (e.getFirstRow() == e.getLastRow()) and, 
            // b) all the changes are in one column (column != TableModelEvent.ALL_COLUMNS) and,
            // c) we are not sorting on that column (getSortingStatus(column) == NOT_SORTED) and, 
            // d) a reverse lookup will not trigger a sort (modelToView != null)
            //
            // Note: INSERT and DELETE events fail this test as they have column == ALL_COLUMNS.
            // 
            // The last check, for (modelToView != null) is to see if modelToView 
            // is already allocated. If we don't do this check; sorting can become 
            // a performance bottleneck for applications where cells  
            // change rapidly in different parts of the table. If cells 
            // change alternately in the sorting column and then outside of             
            // it this class can end up re-sorting on alternate cell updates - 
            // which can be a performance problem for large tables. The last 
            // clause avoids this problem. 
            int column = e.getColumn();
            if (e.getFirstRow() == e.getLastRow()
                    && column != TableModelEvent.ALL_COLUMNS
                    && getSortingStatus(column) == NOT_SORTED
                    && modelToView != null) {
                int viewIndex = getModelToView()[e.getFirstRow()];
                fireTableChanged(new TableModelEvent(VCIJTableSorter.this, 
                                                     viewIndex, viewIndex, 
                                                     column, e.getType()));
                return;
            }

            // Something has happened to the data that may have invalidated the row order. 
            clearSortingState();
            fireTableDataChanged();
            return;
        }
    }

    private class MouseHandler extends MouseAdapter {
        public void mouseClicked(MouseEvent e) {
            JTableHeader h = (JTableHeader) e.getSource();
            TableColumnModel columnModel = h.getColumnModel();
            int viewColumn = columnModel.getColumnIndexAtX(e.getX());
            if(viewColumn < 0 ){
            	return;
            }
            int column = columnModel.getColumn(viewColumn).getModelIndex();
            if(column <= 0){
            	return;
            }
            if (column != -1) {
                int status = getSortingStatus(column);
                if (!e.isControlDown()) {
                    cancelSorting();
                }
                // Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING} or 
                // {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is pressed. 
                status = status + (e.isShiftDown() ? -1 : 1);
                status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
                setSortingStatus(column, status);
            }
        }
    }

    private static class Arrow implements Icon {
        private boolean descending;
        private int size;
        private int priority;

        public Arrow(boolean descending, int size, int priority) {
            this.descending = descending;
            this.size = size;
            this.priority = priority;
        }

        public void paintIcon(Component c, Graphics g, int x, int y) {
            Color color = c == null ? Color.GRAY : c.getBackground();             
            // In a compound sort, make each succesive triangle 20% 
            // smaller than the previous one. 
            int dx = (int)(size/2*Math.pow(0.8, priority));
            int dy = descending ? dx : -dx;
            // Align icon (roughly) with font baseline. 
            y = y + 5*size/6 + (descending ? -dy : 0);
            int shift = descending ? 1 : -1;
            g.translate(x, y);

            // Right diagonal. 
            g.setColor(color.darker());
            g.drawLine(dx / 2, dy, 0, 0);
            g.drawLine(dx / 2, dy + shift, 0, shift);
            
            // Left diagonal. 
            g.setColor(color.brighter());
            g.drawLine(dx / 2, dy, dx, 0);
            g.drawLine(dx / 2, dy + shift, dx, shift);
            
            // Horizontal line. 
            if (descending) {
                g.setColor(color.darker().darker());
            } else {
                g.setColor(color.brighter().brighter());
            }
            g.drawLine(dx, 0, 0, 0);

            g.setColor(color);
            g.translate(-x, -y);
        }

        public int getIconWidth() {
            return size;
        }

        public int getIconHeight() {
            return size;
        }
    }

    private class SortableHeaderRenderer implements TableCellRenderer {
        private TableCellRenderer tableCellRenderer;

        public SortableHeaderRenderer(TableCellRenderer tableCellRenderer) {
            this.tableCellRenderer = tableCellRenderer;
        }

        public Component getTableCellRendererComponent(JTable table, 
                                                       Object value,
                                                       boolean isSelected, 
                                                       boolean hasFocus,
                                                       int row, 
                                                       int column) {
            Component c = tableCellRenderer.getTableCellRendererComponent(table, 
                    value, isSelected, hasFocus, row, column);
            if (c instanceof JLabel) {
                JLabel l = (JLabel) c;
                l.setHorizontalTextPosition(JLabel.LEFT);
                int modelColumn = table.convertColumnIndexToModel(column);
                l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
            }
            return c;
        }
    }

    private static class Directive {
        private int column;
        private int direction;

        public Directive(int column, int direction) {
            this.column = column;
            this.direction = direction;
        }
    }

}