//  Hexpart
//
// copyright (c) 1998-2011 Mark Butler
// This program is free software; you can redistribute it 
// and/or modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation;
// either version 2 of the License, or (at your option) any later version. 

// Hexpart Constructor
function Hexpart()
{
	var x, y;
	var refHexpartX, refHexpartY;
	var hexpartType;
	var name;
	var prefix;
	
	// Hexpart(name)
	if ( Hexpart.arguments.length == 1 )
	{
		this.name = Hexpart.arguments[0];
		this.calculateHexpart();
	}
	
	// Hexpart(x,y)
	if ( Hexpart.arguments.length == 2 )
	{
		this.x = Hexpart.arguments[0];
		this.y = Hexpart.arguments[1];
		
		this.calculateHexpartType();
		this.calculateHexpartName();
	}
}

Hexpart.prototype.setXY = function(x, y)
{
	this.x = x;
	this.y = y;;
		
	this.calculateHexpartType();
	this.calculateHexpartName();
}

Hexpart.prototype.setXYwithNameAndType = function( hexagonName, hexpartType )
{
	var hexagon = new Hexagon(hexagonName);

	this.x = hexagon.getX();
	this.y = hexagon.getY();

	switch ( hexpartType ) {
	
		case HEXAGON_CENTER:
			
			break;
			
		case BOTTOM_HEXSIDE:
		
			this.y = this.y + 2;
			break;
			
		case LOWER_LEFT_HEXSIDE:
		
			this.x = this.x - 1;
			this.y = this.y + 1;
			break;
			
		case UPPER_LEFT_HEXSIDE:
		
			this.x = this.x - 1;
			this.y = this.y - 1;
			break;	
	}
}

Hexpart.prototype.setName = function( hexpartName )
{
	this.name = hexpartName;

	this.calculateHexpart();
}

Hexpart.prototype.calculateHexpartType = function() {

	// center = 1, lower = 2, lower left = 3, upper left = 4
     this.hexpartType = 0;

     // 8 cases
	switch ( this.x % 4 ) {
 		case 0:
			switch ( this.y % 4 ) {
				case 0:
					this.hexpartType = 1;
					break;
				case 2:
					this.hexpartType = 2;
					break;
			}
			break;

 		case 1:
			switch ( this.y % 4 ) {
				case 1:
					this.hexpartType = 4;
					break;
				case 3:
					this.hexpartType = 3;
					break;
			}
			break;

 		case 2:
			switch ( this.y % 4 ) {
				case 0:
					this.hexpartType = 2;
					break;
				case 2:
					this.hexpartType = 1;
					break;
			}
	 		break;

	 	case 3:
			switch ( this.y % 4 ) {
				case 1:
					this.hexpartType = 3;
					break;
				case 3:
					this.hexpartType = 4;
					break;
			}
			break;

	 	default:
			this.hexpartType = 0;
	    }
} 

Hexpart.prototype.calculateHexpartName = function() {

	var name;

	// center = 1, lower = 2, lower left = 3, upper left = 4

 	switch ( this.hexpartType ) {

	    case 1:
			this.refHexpartX = this.x;
			this.refHexpartY = this.y;
			this.prefix = "hexpart:";
			break;

	    case 2:
			this.refHexpartX = this.x;
			this.refHexpartY = this.y - 2;
			this.prefix = "hexpart_";
			break;

	    case 3:
			this.refHexpartX = this.x + 1;
			this.refHexpartY = this.y - 1;
			this.prefix = "hexpart\\";
			break;

	    case 4:
			this.refHexpartX = this.x + 1;
			this.refHexpartY = this.y + 1;
			this.prefix = "hexpart/";
			break;
	}

	if ( this.hexpartType > 0 ) {

	    var refHexagon = new Hexagon();

		refHexagon.setXY(this.refHexpartX, this.refHexpartY);
		this.name = this.prefix + refHexagon.getName();

	} else {

		this.hexpartName = "null";
	}
}
 
Hexpart.prototype.calculateHexpart = function()
{
	// center = :, lower = _, lower left = \\, upper left = /
	//    since \ is a javascript escape char, need to check for \\

	var hexagon = new Hexagon();
	hexagon.setNumber(this.name.substr(8,4));
	
	var hexpartTypeLetter = this.name.charAt(7);

	this.refHexpartX = hexagon.getX();
	this.refHexpartY = hexagon.getY();
	
	switch ( hexpartTypeLetter ) {
	
		case ':':
		
			this.hexpartType = 1;
			this.x = this.refHexpartX;
			this.y = this.refHexpartY;
			break;
			
		case '_':
		
			this.hexpartType = 2;
			this.x = this.refHexpartX;
			this.y = this.refHexpartY + 2;
			break;
			
		case '\\':
		
			this.hexpartType = 3;
			this.x = this.refHexpartX - 1;
			this.y = this.refHexpartY + 1;
			break;
			
		case '/':
		
			this.hexpartType = 4;
			this.x = this.refHexpartX - 1;
			this.y = this.refHexpartY - 1;
			break;
			
		default:
		
			this.hexpartType = 1;
			this.x = this.refHexpartX;
			this.y = this.refHexpartY;
			break;
	}
}

Hexpart.prototype.equals = function(hexpart)
{
    var isEqual;
    isEqual = false;
    
    if ( this.x == hexpart.getX() && this.y == hexpart.getY() )
    {
      isEqual = true;
    }
    
    return isEqual;
}

Hexpart.prototype.getName = function()
{
	return this.name;
}

Hexpart.prototype.getX = function()
{
	return this.x;
}

Hexpart.prototype.getY = function() {

	return this.y;
}

Hexpart.prototype.getHexpartType = function()
{
	return this.hexpartType;
}

Hexpart.prototype.getHexpartTypeName = function() {

    var hexpartTypeName = new Array("", "center", "lower", "lowerLeft", "lowerRight");

    return hexpartTypeName[this.hexpartType];
}