package com.glavsoft.viewer;

import jp.ac.u_ryukyu.treevnc.server.VncProxyService;

public class TreeViewer {
	private boolean treeProxy;
	private boolean viewer;
	private boolean cui = false;
	private int width; 
	private int height;
	private String hostName = null;
	private boolean noConnection = false;
    private boolean permitChangeScreen = true;

	public static void main(String[] args) {
		new TreeViewer().vncStart(args);
	}

	private void vncStart(String[] args) {
	    modeSelect(args);
	    if (treeProxy) {
	        VncProxyService vps = new VncProxyService();
	        vps.setNoConnection(noConnection);
	        vps.proxyStart(args,width,height);
	        if (!permitChangeScreen ) vps.getRfb().setPermitChangeScreen(false);
	        Thread root = new Thread(new Runnable() {
                @Override
                public void run() {
                    vps.getAcceptThread().commandMainLoop();             
                }
	        },"root-command-loop");
	    }
	    ViewerInterface v;
	    if (viewer) {
	        v = cui ? new CuiViewer() : new Viewer();
	        if(hostName!=null) {
	            v.startTreeViewer(hostName,true);
	        } else {
	            v.startTreeViewer();
	        }
	    }
	}

	private void modeSelect(String[] args) {
	    viewer = true; // default
		for (int i = 0; i < args.length; i++) {
			if ("-p".equals(args[i]) || "-r".equals(args[i])) {
				// no display. behave as root.
				// relay rfb update to clients.
				treeProxy = true;
				viewer = false;
            } else if ("-d".equals(args[i])) {
                // behave as root with display.
                // use this on main display such as large tv.
            	noConnection = true;
                treeProxy = true;
                viewer = true;
            } else if ("--cui".equals(args[i])) {
                // use cui viewer 
                cui = true;
			} else if ("-v".equals(args[i]) || "-c".equals(args[i])) {
				// behave as client.
				// open display and connect to some tree node.
				viewer = true;
			} else if ("--version".equals(args[i])) {
				System.out.println("version :" + VncProxyService.ver());
				System.exit(0);
            } else if ("-ns".equals(args[i])) {
                permitChangeScreen = false;
            } else if ("--noScreenChange".equals(args[i])) {
                permitChangeScreen = false;
            } else if ("--retina".equals(args[i])) {
				// retina display too large for TreeVNC.
				// restrict display size.
				width = 1280;
				height = 800;
			} else if ("--width".equals(args[i])) {
				width = Integer.parseInt(args[i+1]);
				i++;
			} else if ("--height".equals(args[i])) {
				height = Integer.parseInt(args[i+1]);
				i++;
			} else if ("--host".equals(args[i])) {
				hostName = args[++i];
			} else {
				System.out.println("(default) TreeVNCClient\n"
						+ "-v or -c:         View shared screen.\n"
						+ "-p:               (proxy) Share my screen and behave as tree root.\n"
                        + "-ns --noScreenChange     Viewers cannot change screen to thiers (default permite screen change)"  
						+ "-d:               Show shared screen and behave as tree root.\n"
						+ "-r:               Connect to fix to specified host and port.\n"
						+ "--host hostname:  Set host name.\n"
						+ "--retina:         Limit screen size for very large display.\n"
						+ "--width w:        Set display width.\n"
						+ "--height h:       Set display height.\n");
			}
		}
	}

	public boolean setWidthAndHeight(String[] args, int i) {
		if(isInteger(args[++i])&&isInteger(args[++i])) {
			width = Integer.parseInt(args[--i]);
			height = Integer.parseInt(args[++i]);
			return true;
		} else {
			width = 1920;
			height = 1080;
			return false;
		}
	}

	private boolean isInteger(String num) {
		try {
			Integer.parseInt(num);
			return true;
		} catch (NumberFormatException e) {
			return false;
		}
	}
}