// $Id: func.js,v 1.16.2.3 2006/06min/27 12:06:39 max Exp $
  
var current_taxes = [];
//var min_avail = 1;
//var product_thumbnail = document.getElementById('product_thumbnail'+productid);
//var availObj = document.getElementById('product_avail'+productid);

/*
	Rebuild page if some options is changed
*/
function check_options(productid) {    
    var product_thumbnail = document.getElementById('product_thumbnail'+productid);
    var availObj = document.getElementById('product_avail'+productid);

    var local_taxes = [];
	var is_rebuild_wholesale = false;
	var variantid = false;
      
	for (var t in taxes[productid]){
		local_taxes[t] = taxes[productid][t][0];		
		}
	price[productid] = default_price[productid];
	
	
	
	/* Find variant */
	for (var x in variants[productid]) {
		if (variants[productid][x][1].length == 0)
			continue;

		variantid = x;
		for (var c in variants[productid][x][1]) {
			if (getPOValue(c) != variants[productid][x][1][c]) {
				variantid = false;
				break;
			}
		}

		if (variantid)
			break;
	}
	
	/* If variant found ... */
	if (variantid) {
		price[productid] = variants[productid][variantid][0][0];		
		orig_price[productid] = variants[productid][variantid][0][4];
		avail = variants[productid][variantid][0][1];

		/* Get variant wholesale prices */
		if (variants[productid][variantid][3]) {
			product_wholesale[productid] = [];
			for (var t in variants[productid][variantid][3]) {
				var _tmp = modi_price(variants[productid][variantid][3][t][2], cloneObject(variants[productid][variantid][3][t][3]), variants[productid][variantid][3][t][4],productid);
				product_wholesale[productid][t] = [variants[productid][variantid][3][t][0], variants[productid][variantid][3][t][1], _tmp[0], []];

				/* Get variant wholesale taxes */
				for (var c in _tmp[1]) {
					product_wholesale[productid][t][3][c] = _tmp[1][c];
				}
			}
			is_rebuild_wholesale = true;
		}

		/* Get variant taxes */
		for (var t in local_taxes) {
			if (variants[productid][variantid][2][t])
				local_taxes[t] = parseFloat(variants[productid][variantid][2][t]);
		}

        //	if (!product_thumbnail)
		//	product_thumbnail = document.getElementById('product_thumbnail'+productid);

		/* Change product thumbnail */
		if (product_thumbnail) {
			if (variants[productid][variantid][0][2].src && variants[productid][variantid][0][2].width > 0 && variants[productid][variantid][0][2].height > 0) {
				if (product_thumbnail.src != variants[productid][variantid][0][2].src) {
					product_thumbnail.src = variants[productid][variantid][0][2].src;
					product_thumbnail.width = variants[productid][variantid][0][2].width;
					product_thumbnail.height = variants[productid][variantid][0][2].height;
				}
			} else if (document.getElementById('product_thumbnail'+productid).src != product_image.src) {
				product_thumbnail.src = product_image.src;
				if (product_image.width > 0 && product_image.height > 0) {
					product_thumbnail.width = product_image.width;
					product_thumbnail.height = product_image.height;
				}
			}
		}

		/* Change product weight */
		if (document.getElementById('product_weight'+productid))
			document.getElementById('product_weight'+productid).innerHTML = variants[productid][variantid][0][3];

	}
	   
    if (pconf_price > 0)
		price[productid] = pconf_price;
    				
	/* Find modifiers */	
	var _tmp = modi_price(price[productid], local_taxes, orig_price[productid],productid);		
	price[productid] = _tmp[0];
			
	local_taxes = _tmp[1];
	if (!variantid) {
		product_wholesale[productid] = [];
		for (var t in _product_wholesale[productid]) {
			_tmp = modi_price(_product_wholesale[productid][t][2], _product_wholesale[productid][t][3], _product_wholesale[productid][t][4],productid);
			product_wholesale[productid][t] = [_product_wholesale[productid][t][0], _product_wholesale[productid][t][1], _tmp[0],_tmp[1]];			
		}
		is_rebuild_wholesale = true;
	}

	/* Update taxes */
	for (var t in local_taxes) {
		if (document.getElementById('tax_'+t+productid)) {
			document.getElementById('tax_'+t+productid).innerHTML = currency_symbol+price_format(local_taxes[t]);
		}
		current_taxes[t] = local_taxes[t];
	}

	if (is_rebuild_wholesale)
		rebuild_wholesale();

	/* Update form elements */
	/* Update price */	
	if (document.getElementById('product_price'+productid))
		document.getElementById('product_price'+productid).innerHTML = currency_symbol+price_format(price[productid]);

	/* Update alt. price */		
	if (alter_currency_rate > 0 && alter_currency_symbol != "" && document.getElementById('product_alt_price'+productid))
	{	        	    
	    document.getElementById('product_alt_price'+productid).innerHTML = "("+alter_currency_symbol+" "+price_format(price[productid]*alter_currency_rate)+")";
	

	}	

	/* Update Save % */	
	if (document.getElementById('save_percent'+productid) && list_price[productid] > 0 && dynamic_save_money_enabled) {
		var save_percent = Math.round(100-(price[productid]/list_price[productid])*100);		
		if (save_percent > 0) {
			if (document.getElementById('save_percent_box'+productid)){
			document.getElementById('save_percent_box'+productid).style.display = '';}
			document.getElementById('save_percent'+productid).innerHTML = save_percent;
		} else {
			if (document.getElementById('save_percent_box'+productid)){
			document.getElementById('save_percent_box'+productid).style.display = 'none';}
			document.getElementById('save_percent'+productid).innerHTML = '0';
		}
	}

	/* Update product quantity */
	if (document.getElementById('product_avail_txt'+productid)) {
		if (avail > 0) {
			document.getElementById('product_avail_txt'+productid).innerHTML = substitute(txt_items_available, "items", (variantid ? avail : product_avail));
		} else {
			document.getElementById('product_avail_txt'+productid).innerHTML = lbl_no_items_available;
		}
	}

	if ((mq > 0 && avail > mq+min_avail) || is_unlimit)
		avail = mq+min_avail-1;

	var select_avail = min_avail;
	/* Update product quantity selector */
	//if (!availObj)
	//	availObj = document.getElementById('product_avail'+productid);

	if (availObj && availObj.tagName.toUpperCase() == 'SELECT') {
		if (!isNaN(min_avail) && !isNaN(avail)) {
			var first_value = -1;
			if (availObj.options[0])
				first_value = availObj.options[0].value;

			if (first_value == min_avail) {

				/* New and old first value in quantities list is equal */
				if ((avail-min_avail) != availObj.options.length) {
					if (availObj.options.length > avail-min_avail) {
						var cnt = availObj.options.length;
						for (var x = avail-min_avail; x < cnt-1; x++)
							availObj.options[availObj.options.length-1] = null;
					} else {
						var cnt = availObj.options.length;
						for (var x = cnt+min_avail; x <= avail; x++)
							availObj.options[cnt++] = new Option(x, x);
					}
				}
			} else {

				/* New and old first value in quantities list is differ */
				while (availObj.options.length > 0)
					availObj.options[0] = null;
				var cnt = 0;
				for (var x = min_avail; x <= avail; x++)
					availObj.options[cnt++] = new Option(x, x);
			}
			if (availObj.options.length == 0)
				availObj.options[0] = new Option(txt_out_of_stock, 0);
		}
		select_avail = availObj.options[availObj.selectedIndex].value;
	}

	check_wholesale(select_avail,productid);

	if ((alert_msg == 'Y') && (min_avail > avail))
		alert(txt_out_of_stock);
	
	/* Check exceptions */
	var ex_flag = check_exceptions();
	if (!ex_flag && (alert_msg == 'Y'))
		alert(exception_msg);
			
	if (document.getElementById('exception_msg'+productid))
		document.getElementById('exception_msg'+productid).innerHTML = (ex_flag ? '' : exception_msg_html+"<br /><br />");

	return true;
}

/*
	Calculate product price with price modificators 
*/
function modi_price(_price, _taxes, _orig_price,productid) {
var return_price = round(_price, 2);

	/* List modificators */
	for (var x2 in modifiers[productid]) {
		var value = getPOValue(x2);
                 
		if (!value || !modifiers[productid][x2][value])
			continue;

		/* Get selected option */
		var elm = modifiers[productid][x2][value];
		return_price += parseFloat(elm[1] == '$' ? elm[0] : (_price*elm[0]/100));		

		/* Get tax extra charge */
		for (var t2 in _taxes) {
			if (elm[2][t2]) {
				_taxes[t2] += (elm[1] == '$' ? elm[2][t2] : (_orig_price*elm[2][t2]/100));
			}
		}
	}
  
	return [return_price, _taxes];
}

/*
	Check product options exceptions
*/
function check_exceptions(productId) 
{
	if (!productId || !exceptions[productId])
		return true;

	/* List exceptions */
	for (var x in exceptions[productId]) {
		if (isNaN(x))
			continue;

		var found = true;
        for (var c in exceptions[productId][x]) {
			var value = getPOValue(c);
			if (!value)
				return true;

            if (value != exceptions[productId][x][c]) {
				found = false;
				break;
			}
		}
		if (found)
			return false;
	}

	return true;
}

/*
	Rebuild wholesale tables
*/
function rebuild_wholesale(productid) {

	var obj = document.getElementById('wl_table');
	if (!obj)
		return false;

	/* Clear wholesale span object if product wholesale prices service array is empty */
	if (!product_wholesale[productid] || product_wholesale[productid].length == 0) {
		obj.innerHTML = "";
		return false;
	}

	/* Display headline */
	var str = '<br /><table cellpadding="2" cellspacing="2"><tr class="TableHead"><td align="right"><b>'+lbl_quantity+':&nbsp;</b></td>';
	for (var x in product_wholesale[productid]) {
		if (product_wholesale[productid][x][0] == 0)
			continue;
		str += '<td>'+product_wholesale[productid][x][0];
		if (x == product_wholesale[productid].length-1)
			str +='+';
		else if (product_wholesale[productid][x][0] != product_wholesale[productid][x][1])
			str += '-'+product_wholesale[productid][x][1];
		str += '&nbsp;'+(product_wholesale[productid][x][0] == 1 ? lbl_item : lbl_items)+'</td>';
	}

    /* Display wholesale prices taxes */
	var tax_str = '';
    if (taxes[productid].length > 0) {
        for (var x in taxes[productid]) {
            if (current_taxes[x] > 0)
                tax_str += substitute(lbl_including_tax, 'tax', taxes[productid][x][1])+'<br />';
        }
    }

	/* Display wholesale prices */
	str += '</tr><tr bgcolor="#EEEEEE"><td align="right"><b>'+lbl_price+(tax_str.length > 0 ? '*' : '')+':&nbsp;</b></td>';
	for (var x in product_wholesale[productid]) {
		if (product_wholesale[productid][x][0] == 0)
			continue;
		str += '<td>'+price_format(product_wholesale[productid][x][2])+'</td>';
	}

	str += '</tr></table>';

	if (tax_str.length > 0)
		str += '<br /><table><tr><td class="FormButton" valign="top"><b>*'+txt_note+':</b>&nbsp;</td><td nowrap="nowrap" valign="top">'+tax_str+'</td></tr></table>';

	str += '<br />';
	obj.innerHTML = str;

	return true;
}

/*
	Display current wholesale price as product price
*/
function check_wholesale(qty,productid) {
        
    if (product_wholesale[productid].length == 0)
		return true;

	var wl_taxes = current_taxes.slice(0);
	var wl_price = price[productid];
	var found = false;
	for (var x = 0; x < product_wholesale[productid].length; x++) {
		if (product_wholesale[productid][x][0] <= qty && (product_wholesale[productid][x][1] >= qty || product_wholesale[productid][x][1] == 0)) {
			wl_price = product_wholesale[productid][x][2];
			wl_taxes = product_wholesale[productid][x][3].slice(0);
			found = true;
		}
		if (document.getElementById('wp'+x+productid))
			document.getElementById('wp'+x+productid).innerHTML = currency_symbol+price_format(price[productid]-default_price[productid]+product_wholesale[productid][x][2]);
	}

	if (document.getElementById('product_price'+productid))
		document.getElementById('product_price'+productid).innerHTML = currency_symbol+price_format(wl_price);
	if (alter_currency_rate > 0 && alter_currency_symbol != "" && document.getElementById('product_alt_price'+productid))
		document.getElementById('product_alt_price'+productid).innerHTML = "("+alter_currency_symbol+" "+price_format((wl_price)*alter_currency_rate)+")";

	for (var x in taxes[productid]) {
		if (document.getElementById('tax_'+x+productid) && wl_taxes[x] && current_taxes[x]) {
			document.getElementById('tax_'+x+productid).innerHTML = currency_symbol+price_format(wl_taxes[x]);
		}
	}

	return true;
}

/*
	Get product option value
*/
function getPOValue(c) {
        
    if (!document.getElementById('po'+c) || document.getElementById('po'+c).tagName.toUpperCase() != 'SELECT')
		return false;
	return document.getElementById('po'+c).options[document.getElementById('po'+c).selectedIndex].value;
}

/*
    Get product option object by class name / class id
*/
function product_option(classid) {
        
    if (!isNaN(classid))
		 return document.getElementById("po"+classid);

	if (!names[productid])
		return false;

	for (var x in names[productid]) {
		if (names[productid][x]['class_name'] != classid)
			continue;
		return document.getElementById('po'+x);
    }

	return false;
}

/*
	Get product option value by class name / or class id
*/
function product_option_value(classid) {
	var obj = product_option(classid);
	if (!obj)
		return false;

	if (obj.type != 'select-one')
		return obj.value;

	var classid = parseInt(obj.id.substr(2));
	var optionid = parseInt(obj.options[obj.selectedIndex].value);
	if (names[productid][classid] && names[productid][classid]['options'][optionid])
		return names[productid][classid]['options'][optionid];

	return false;
}