/** Generators website javascript functions **/

function refreshComparisons()
{
	var refreshCodes = new Array();

	if ( (document.getElementById('compareCombo1') != null) && (document.getElementById('compareCombo1').value != '' ) )
	{
		refreshCodes[0] = document.getElementById('compareCombo1').value;
	}
	if ( (document.getElementById('compareCombo2') != null) && (document.getElementById('compareCombo2').value != '' ) )
	{
		refreshCodes[1] = document.getElementById('compareCombo2').value;
	}
	if ( (document.getElementById('compareCombo3') != null) && (document.getElementById('compareCombo3').value != '' ) )
	{
		refreshCodes[2] = document.getElementById('compareCombo3').value;
	}

	renderComparisons(refreshCodes);
}

function renderComparisons(codes)
{
	if ( codes.length == 2 )
	{
		$('#compareResultsTable').getTransform('templates/compare.xsl', 'products/products.xml', {params: {'code1': codes[0], 'code2': codes[1]}});
		$('#compareSelectTable').getTransform('templates/compare-dd.xsl', 'products/products.xml', {params: {'code1': codes[0], 'code2': codes[1]}});
	}
	else if ( codes.length == 3 )
	{
		$('#compareResultsTable').getTransform('templates/compare.xsl', 'products/products.xml', {params: {'code1': codes[0], 'code2': codes[1], 'code3': codes[2]}});
		$('#compareSelectTable').getTransform('templates/compare-dd.xsl', 'products/products.xml', {params: {'code1': codes[0], 'code2': codes[1], 'code3': codes[2]}});
	}
	else
	{
		alert('Please select 2 or 3 products to compare');
		return;
	}
}

/**
 * Adds the items (with a suffix) to the combo element referenced by id
 */
function populateCombo(id, items, suffix)
{
	for (i=0; i<items.length; i=i+1) 
	{
		// don't append the suffix if it's the first item (typically this item will be 'Please Select')
		if (i == 0)
		{
			// add the new combo box item to the combo box without a suffix
			document.getElementById(id)[i] = new Option(items[i], items[i], false);
		}
		else
		{
			// add the new combo box item to the combo box with a suffix
			document.getElementById(id)[i] = new Option(items[i] + suffix, items[i], false);
		}
	}
}

/**
 * Returns an array of parameter values inside the URL
 * string of the current browser page with parameter name
 * of 'param'
 */
function getHttpGetParameters(param)
{
	// split the URL at the ? character
	var hrefArray = document.location.href.split('?');
	
	// if the split produces only 1 array element then return an error
	if (hrefArray.length == 1)
	{
		alert('No parameters detected.');
		return;
	}
	
	// split the 2nd part of the array at the & character
	var parameterPairs = hrefArray[1].split('&');
	var parameterValues = '';

	// iterate over the pairings (param1=a,param2=b)
	for (var pair in parameterPairs)
	{
		// get the param and value into array
		var bits = parameterPairs[pair].split('=');
		
		// if the param equals our chosen param, then add it to the list
		if (bits[0] == param)
		{
			parameterValues += bits[1] + ',';
		}
	}  

	return parameterValues.substring(0, parameterValues.length-1).split(',');
}

function validateCompareSelection(ancor)
{
	// only add the product code to the URL if there's space		
	if ( (ancor.href.split('&').length < 2) || (ancor.href.split('&').length > 3) )
	{
	
		if ( (ancor.href.split('&').length < 2) )
		{
			alert('Please select a minimum of 2 products to compare');
			return false;
		}
		
		if ( (ancor.href.split('&').length > 3) )
		{
			alert('Please select a maximum of 3 products to compare');
			return false;
		}
		
		alert('Please select 2 or 3 products to compare');
		return false;
	}
}

/**
 * Called by each compare checkbox, appends the selected product code
 * with the appropriate URL parameter name to the href of the actual
 * hyperlink, so when the user is ready to proceed to compare the URL
 * will have been composed.
 */
function appendProductCode(name, checkbox)
{
	var url = 'compare.html?';

	$('input[@name=compare]').filter(':checked').each(function()
	{
		url += 'code=' + $(this).attr('id') + '&';
	});
	
	url = url.substring(0, url.length-1);
	
	$('#compareLink').attr('href', url);
	$('#compareLinkBottom').attr('href', url);
}

/**
 * Alerts the user to the redirect to seddons site for purchase
 */
function redirectConfirm() {
	
	var answer = confirm('Please note:\n\nAll online purchases are handled by our Honda Approved Partner.\n\nIf you click OK you will be redirected to their site in order to complete your order.');
	
	return answer;
	
}