package com.ericsson.tic.vi;

import javax.swing.JPanel;
import javax.swing.JSplitPane;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.util.ListIterator;

/**
 * A panel which can be split multiple times.
 *
 * @author	Sami Matilainen
 * @version 1.0 (2008-12-04)
 */
public class SplitViewPanel extends JPanel {
	
	/** A splitpane. */
	public JSplitPane splitPane;
	
	/** A ViewPanel. */
	private ViewPanel view;
	
	/** Leaf panels. */
	public SplitViewPanel panel0, panel1;
	
	/** The parent of this split view. null if this is the root. */
	public SplitViewPanel parent;
	
	/** True if this panel is split. */
	public boolean isSplit;
	
	/**
	 * Creates the main view panel which can be split into subpanels.
	 *
	 * @param parent The parent of the splitViewPanel. null if this is the root.
	 * @param view The initial ViewPanel
	 */
	public SplitViewPanel(SplitViewPanel parent, ViewPanel view) {
		
		this.parent = parent;
		this.isSplit = false;
		
		if (view == null) {
			this.view = new ViewPanel(VI.requestViewID() , this);
		} else {
			this.view = view;
			this.view.splitParent = this;
		}
		
		if (parent != null) {
			this.view.closeMenuItem.setEnabled(true);
		}
		
		this.setLayout(new BorderLayout());
		
		this.setPreferredSize(new Dimension(200, 200));
		
		this.add(this.view, BorderLayout.CENTER);
		
	}
	
	/**
	 * Splits the view vertically.
	 */
	public void splitVertical() {
		
		panel0 = new SplitViewPanel(this, this.view);
		panel1 = new SplitViewPanel(this, null);
		splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, panel0, panel1);
		this.view = null;
		this.removeAll();
		this.setLayout(new BorderLayout());
		this.isSplit = true;
		this.add(splitPane, BorderLayout.CENTER);
		this.revalidate();
		
		ListIterator iter = VI.windowList.listIterator();
		GUI gui = null;
		
		while (iter.hasNext()) {
			gui = (GUI)iter.next();
			
			DataListPanel dp = (DataListPanel)gui.list.viewsCard;
			dp.updateViewList();

		}
		
	}
	
	/**
	 * Splits the view horizontally.
	 */
	public void splitHorizontal() {
			
		panel0 = new SplitViewPanel(this, view);
		panel1 = new SplitViewPanel(this, null);
		splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, panel0, panel1);
		this.view = null;
		this.removeAll();
		this.setLayout(new BorderLayout());
		this.isSplit = true;
		this.add(splitPane, BorderLayout.CENTER);
		this.revalidate();
		
		ListIterator iter = VI.windowList.listIterator();
		GUI gui = null;
		
		while (iter.hasNext()) {
			gui = (GUI)iter.next();
			
			DataListPanel dp = (DataListPanel)gui.list.viewsCard;
			dp.updateViewList();

		}
		
	}
	
	/**
	 * Closes one of the views. This method is currently bugged.
	 */
	public void closeView() {
		
		// todo: make this work!
		// this method is currently bugged and will cause one of the views to
		// crash or makes it impossible to create new views
		// problem most likely lies in some problem with the tree structure
		// which keeps track of the panes.
		
		if (parent != null) {
			
			if (this.equals(parent.panel0)) {
				
				ListIterator iter = VI.viewList.listIterator();
				ViewPanel vp = null;
		
				while (iter.hasNext()) {
					vp = (ViewPanel)iter.next();
					if (vp.id == parent.panel0.view.id) {
						iter.remove();
					}
				}
				
				if (parent.panel1.isSplit) {
					parent.splitPane = parent.panel1.splitPane;
					SplitViewPanel t0 = parent.panel1.panel0;
					SplitViewPanel t1 = parent.panel1.panel1;
					parent.panel0 = t0;
					parent.panel1 = t1;
					parent.view = null;
					parent.removeAll();
					parent.add(parent.splitPane, BorderLayout.CENTER);
					
				} else {
					parent.splitPane = null;
					parent.view = parent.panel1.view;
					parent.panel0 = null;
					parent.panel1 = null;
					//this.isSplit = false;
					parent.isSplit = false;
					parent.removeAll();
					parent.add(parent.view, BorderLayout.CENTER);
					
					if (parent.parent == null) {
						parent.view.closeMenuItem.setEnabled(false);
					}
					
				}
				
			} else {
				
				ListIterator iter = VI.viewList.listIterator();
				ViewPanel vp = null;
		
				while (iter.hasNext()) {
					vp = (ViewPanel)iter.next();
					if (vp.id == parent.panel1.view.id) {
						iter.remove();
					}
				}
				
				if (parent.panel0.isSplit) {
					parent.splitPane = parent.panel0.splitPane;
					SplitViewPanel t0 = parent.panel0.panel0;
					SplitViewPanel t1 = parent.panel0.panel1;
					parent.panel0 = t0;
					parent.panel1 = t1;
					parent.view = null;
					parent.removeAll();
					parent.add(parent.splitPane, BorderLayout.CENTER);
					
				} else {
					parent.splitPane = null;
					parent.view = parent.panel0.view;
					parent.panel0 = null;
					parent.panel1 = null;
					//this.isSplit = false;
					parent.isSplit = false;
					parent.removeAll();
					parent.add(parent.view, BorderLayout.CENTER);
					
					if (parent.parent == null) {
						parent.view.closeMenuItem.setEnabled(false);
					}
					
				}
				
			}
			
			parent.revalidate();
			
		}
		
	}

}