// JavaScript Document

function collapseAll() {
	document.getElementById("product_1_readMoreButton").style.display = "block";
	document.getElementById("product_2_readMoreButton").style.display = "block";
	document.getElementById("product_3_readMoreButton").style.display = "block";
	
	document.getElementById("product_1_description").style.display = "none";
	document.getElementById("product_2_description").style.display = "none";
	document.getElementById("product_3_description").style.display = "none";
}

function expand(id) {
	collapseAll();
	
	document.getElementById("product_" + id + "_readMoreButton").style.display = "none";
	document.getElementById("product_" + id + "_description").style.display = "block";
}

var ajax_obj, ajax_response_div, ajax_progress_msg, ajax_error_msg;

ajax_response_div = null;

function AJAX_sendAndLoad(script, vars) {
	ajax_obj = createAjaxObject();
	
	if (ajax_obj != false) {
		ajax_obj.onreadystatechange = AJAX_parseServerResponse;
		ajax_obj.open("POST", script + "?randID=" + parseInt(Math.random()*99999999), true);
		ajax_obj.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		ajax_obj.send(vars);
	} else {
		if (ajax_response_div !== null) {
			ajax_response_div.innerHTML = "Your browser does not support AJAX.";
		}
	}
}

function AJAX_parseServerResponse() {
	if (ajax_obj.readyState == 4) {
		if (ajax_obj.status == 200) {
			var xmlDoc;
			if (window.DOMParser) {
				var parser = new DOMParser();
				xmlDoc = parser.parseFromString(ajax_obj.responseText, "text/xml");
			} else {
				xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
				xmlDoc.async = "false";
				xmlDoc.loadXML(ajax_obj.responseText);
			}
			
			var displayMessage = new Object();
			var displayMessage_element = xmlDoc.getElementsByTagName("displayMessage")[0];
			
			displayMessage.successMessage = displayMessage_element.getElementsByTagName("successMessage")[0].childNodes[0].nodeValue;
						
			var message;
			
			message = displayMessage.successMessage;
			
			ajax_response_div.innerHTML = message;
			
			var commands = Array();
			var commands_element = xmlDoc.getElementsByTagName("commands")[0];
			
			for (var command = 0; command < commands_element.childNodes.length; command++) {
				if (commands_element.childNodes[command].nodeType == 1) { 
					var command_name = commands_element.childNodes[command].nodeName;
					var command_value = commands_element.childNodes[command].childNodes[0].nodeValue;
					
					if (command_name == "addItemToCart") {
						
						command_values = command_value.split(",");
						var item_number = command_values[0];
						var item_id = command_values[1];
						var item_qty = command_values[2];
						
						showNewCartItem(item_number, item_id, item_qty);
						
						document.getElementById("product_" + item_id + "_addToCartButton").style.display = "block";
						document.getElementById("product_" + item_id + "_addingToCartText").style.display = "none";
						
						ajax_response_div = null;
						
					} else if (command_name == "updateCartItem") {
						
						command_values = command_value.split(",");
						var item_number = command_values[0];
						var item_id = command_values[1];
						var item_qty = command_values[2];
						
						updateCartItem(item_number, item_id, item_qty);
						
						document.getElementById("product_" + item_id + "_addToCartButton").style.display = "block";
						document.getElementById("product_" + item_id + "_addingToCartText").style.display = "none";
						
						ajax_response_div = null;
						
					} else if (command_name == "removeItemFromCart") {
						
						var item_number = command_value;
						
						collapseItem("cart_item_" + item_number, false);
						
						ajax_response_div = null;
						
					} else if (command_name == "updateCartTotal") {
						
						var totalprice_float = parseFloat(command_value);
						var url = String(window.location);
						
						document.getElementById("cart-total-price").innerHTML = command_value;
						
						document.getElementById("cart-total-calculating").style.display = "none";
						document.getElementById("cart-total-calculated").style.display = "block";
						
						if (url.indexOf("cart.php", url.lastIndexOf("/") + 1) > -1) {
							document.getElementById("cart-total-calculated").innerHTML = "<span style=\"font-size:12px; font-weight:normal; color:#990000;\">NOTE: Your total has been updated.</span> <a href=\"#\" onclick=\"loadCartBackup(); return false;\">Undo Changes</a> &gt;&gt; TOTAL: <span style=\"font-size:18px;\">$<span id=\"cart-total-price\">" + command_value + "</span></span>";
						}
						
						if (totalprice_float == 0) {
							collapseItem("cart-totals", true);
							expandItem("cart-empty", false);
							
							if (url.indexOf("cart.php", url.lastIndexOf("/") + 1) > -1) {
								document.getElementById("pp_submit_btn").style.display = "none";
								document.getElementById("pp_submit_btnDisabled").style.display = "inline-block";
								
								document.getElementById("dd_submit_btn").disabled = "disabled";
								
								//window.location.reload(true);
								//collapseItem("temp", false);
							}
						}
						
					} else if (command_name == "submitPPForm") {
						
						if (command_value) {
							submitPPForm(2, command_value);
							
							ajax_response_div = null;
						}
						
					} else if (command_name == "submitDDForm") {
						
						submitDDForm(2);
						
					}
				}
			}
			
		} else {
			if (ajax_response_div !== null) {
				if (ajax_error_msg != "") {
					ajax_response_div.innerHTML = ajax_error_msg;
				}
			}
		}
	} else {
		if (ajax_response_div !== null) {
			if (ajax_progress_msg != "") {
				ajax_response_div.innerHTML = ajax_progress_msg;
			}
		}
	}
}

function formatAsCurrency(float) {
	var price;
	
	if (isNaN(parseFloat(float))) {
		price = "0.00";
	} else {
		price = parseFloat(float);
		
		if (price < 0.01) {
			price = "0.00";
		} else {
			
			// Format to 2 decimal places
			
			price = Math.round(price * 100) / 100;
			price_cents_str = String(Math.round((price - Math.floor(price)) * 100) / 100);
			if (price_cents_str.length == 3) {
				price = String(price) + "0";
			} else if (price_cents_str.length == 1) {
				price = String(price) + ".00";
			} else {
				price = String(price);
			}
			
			// Format with comma-separated thousands
			
			var number_parts, dollars, cents, formatted_dollars, loop_limit;
			
			number_parts = price.split(".");
			dollars = number_parts[0];
			cents = number_parts[1];
			formatted_dollars = "";
			loop_limit = 15;
			
			while (dollars.length > 3 && loop_limit > 0) {
				formatted_dollars = "," + dollars.slice(dollars.length - 3, dollars.length) + formatted_dollars;
				dollars = dollars.slice(0, dollars.length - 3);
				loop_limit--;
			}
			formatted_dollars = dollars + formatted_dollars;
			
			price = formatted_dollars + "." + cents;
		}
	}
	
	return price;
}

function calcPrices(item_id, qty) {
	var prices = new Object();
	
	var unit_price, single_unit_price;
	
	var unitPrice, totalPrice, discount;
	
	if (isNaN(parseFloat(qty))) {
		unitPrice = "0.00";
		totalPrice = "0.00";
		discount = "0.00";
	} else {
		qty = Math.abs(Math.floor(parseFloat(qty)));
		
		if (qty == 1 || qty == 2) {
			unit_price = products_arr[item_id]["qty_" + qty + "_unitPrice"];
		} else {
			unit_price = products_arr[item_id]["qty_3plus_unitPrice"];
		}
		single_unit_price = products_arr[item_id]["qty_" + 1 + "_unitPrice"];
		
		if (isNaN(parseFloat(unit_price)) || isNaN(parseFloat(single_unit_price))) {
			unitPrice = "0.00";
			totalPrice = "0.00";
			discount = "0.00";
		} else {
			unit_price = parseFloat(unit_price);
			single_unit_price = parseFloat(single_unit_price);
			
			unitPrice = formatAsCurrency(unit_price);
			totalPrice = formatAsCurrency(unit_price * qty);
			discount = formatAsCurrency((single_unit_price * qty) - (unit_price * qty));
		}
	}
	
	prices.unitPrice = unitPrice;
	prices.totalPrice = totalPrice;
	prices.discount = discount;
	
	return prices;
}

function updatePricePreview(id) {
	var qty;
	
	qty = document.getElementById("product_" + id + "_qty").value;
	
	var prices;
	
	prices = calcPrices(id, qty);
	
	document.getElementById("product_" + id + "_calculatedPrice").innerHTML = prices.totalPrice;
	document.getElementById("product_" + id + "_calculatedDiscount").innerHTML = prices.discount;
}

function updateCartPrices(id) {
	var qty;
	
	qty = document.getElementById("product_" + id + "_qty").value;
	
	var prices;
	
	prices = calcPrices(id, qty);
	
	document.getElementById("cartItem_" + id + "_price").innerHTML = prices.totalPrice;
	
	var done = false;
	var totalPrice = 0;
	
	for (var i = 0; i < 200 && !done; i++) {
		var element_id_holder = document.getElementById("cart_item_" + i + "_id");
		if (element_id_holder === null) {
			done = true;
		} else {
			var element_id = element_id_holder.value;
			
			if (document.getElementById("cart_item_" + i).style.display.toLowerCase() != "none") {
				qty = document.getElementById("product_" + element_id + "_qty").value;
				
				prices = calcPrices(element_id, qty);
				
				totalPrice += Number(prices.totalPrice.split(",").join(""));
			}
		}
	}
	
	if (totalPrice == 0) {
		document.getElementById("pp_submit_btn").style.display = "none";
		document.getElementById("pp_submit_btnDisabled").style.display = "inline-block";
		
		document.getElementById("dd_submit_btn").disabled = "disabled";
	} else {
		document.getElementById("pp_submit_btn").style.display = "inline-block";
		document.getElementById("pp_submit_btnDisabled").style.display = "none";
		
		document.getElementById("dd_submit_btn").disabled = false;
	}
	
	totalPrice = formatAsCurrency(totalPrice);
	
	document.getElementById("cart-total-calculated").innerHTML = "<span style=\"font-size:12px; font-weight:normal; color:#990000;\">NOTE: Your total has been updated.</span> <a href=\"#\" onclick=\"loadCartBackup(); return false;\">Undo Changes</a> &gt;&gt; TOTAL: <span style=\"font-size:18px;\">$<span id=\"cart-total-price\">" + totalPrice + "</span></span>";
}

function addProductToCart(id) {
	if (ajax_response_div === null) {
		
		var qty;
		qty = document.getElementById("product_" + id + "_qty").value;
		
		qty = Number(qty);
		if (!isNaN(qty)) {
			qty = Math.floor(qty);
			if (qty > 0) {
				ajax_response_div = document.getElementById("product_" + id + "_status");
				ajax_progress_msg = "Adding item to cart...";
				ajax_error_msg = "Item could not be added.";
				
				if (document.getElementById("cart-items").style.display == "none") {
					document.getElementById("cart-items").style.display = "block";
				}
				
				if (document.getElementById("cart-empty").style.display == "block") {
					collapseItem("cart-empty", true);
					expandItem("cart-totals", false);
				}
				
				document.getElementById("product_" + id + "_addToCartButton").style.display = "none";
				document.getElementById("product_" + id + "_addingToCartText").style.display = "block";
				document.getElementById("cart-total-calculating").style.display = "block";
				document.getElementById("cart-total-calculated").style.display = "none";
				
				AJAX_sendAndLoad("includes/ajax/addProductToCart.php", "id=" + id + "&qty=" + qty);
			}
		}
	}
}

function removeProductFromCart(item_number) {
	if (ajax_response_div === null) {
		ajax_response_div = document.getElementById("cart_item_" + item_number + "_status");
		ajax_progress_msg = "Removing...";
		ajax_error_msg = "Error.";
		
		ajax_response_div.style.display = "block";
		
		document.getElementById("cart-total-calculating").style.display = "block";
		document.getElementById("cart-total-calculated").style.display = "none";
		
		AJAX_sendAndLoad("includes/ajax/removeProductFromCart.php", "item_number=" + item_number);
	}
}

function loadCartBackup() {
	var df = document.createElement("form");
	df.setAttribute("method", "post");
	df.setAttribute("action", "cart.php");
	document.body.appendChild(df);
	
	var i_cmd = document.createElement("input");
	i_cmd.setAttribute("type", "hidden");
	i_cmd.setAttribute("name", "undoCartChanges");
	i_cmd.setAttribute("value", 1);
	df.appendChild(i_cmd);
	
	df.submit();
}

function submitPPForm(stage, encryptedPostData) {
	document.getElementById("pp_newsletter").disabled = "disabled";
	document.getElementById("pp_email").readOnly = "readonly";
	
	document.getElementById("pp_submit_btn").style.display = "none";
	document.getElementById("pp_submit_btnDisabled").style.display = "inline-block";
	
	if (stage == 1) {
		if (ajax_response_div === null) {
			ajax_response_div = document.getElementById("pp_submitting_msg");
			ajax_progress_msg = "Submitting...";
			ajax_error_msg = "Error.";
			
			var done = false;
			var vars = "";
			var totalItems = 0;
			
			for (var i = 0; i < 200 && !done; i++) {
				var element_id_holder = document.getElementById("cart_item_" + i + "_id");
				if (element_id_holder === null) {
					done = true;
				} else {
					var element_id = element_id_holder.value;
					
					if (document.getElementById("cart_item_" + i).style.display.toLowerCase() != "none") {
						qty = document.getElementById("product_" + element_id + "_qty").value;
						if (isNaN(parseFloat(qty))) {
							qty = 0;
						} else {
							qty = Math.abs(Math.floor(parseFloat(qty)));
						}
						
						if (qty == 0) {
							document.getElementById("cart_item_" + i).style.display = "none";
						}
						
						vars += "&item_" + i + "_id=" + element_id;
						vars += "&item_" + i + "_qty=" + qty;
						
						totalItems += qty;
					}
				}
			}
			
			vars = "cartItems=" + (i - 1) + "&totalItems=" + totalItems + vars;
			
			if (document.getElementById("pp_newsletter").checked) {
				vars = vars + "&newsletter=" + escape(document.getElementById("pp_email").value);
				
				var newsletter_email_host = document.getElementById("pp_email").value;
				newsletter_email_host = newsletter_email_host.slice(newsletter_email_host.lastIndexOf("@") + 1);
				newsletter_email_host = newsletter_email_host.toLowerCase();
				
				if (newsletter_email_host.indexOf("hotmail.com") === 0 || newsletter_email_host.indexOf("live.com") === 0 || newsletter_email_host.indexOf("msn.com") === 0) {
					alert("Please add \"newsletter@vitalhealthchoices.com.au\" to your email address book\nto prevent our newsletters being filtered as spam.\nThank you.");
				}
			}
			
			vars = vars + "&paypal=1";
			
			AJAX_sendAndLoad("includes/ajax/updateCart.php", vars);
		}
	} else if (stage == 2) {
		document.getElementById("pp_submitting_msg").innerHTML = "Processing...";
		
		document.getElementById("pp_encryptedPostData").value = encryptedPostData;
		
		document.getElementById("pp_form").submit();
		
		/*document.getElementById("pp_submitting_msg").innerHTML = "";
		
		document.getElementById("pp_newsletter").disabled = false;
		document.getElementById("pp_email").readOnly = false;
		
		document.getElementById("pp_submit_btn").style.display = "inline-block";
		document.getElementById("pp_submit_btnDisabled").style.display = "none";*/
	}
}

function submitDDForm(stage) {
	document.getElementById("dd_name_first").readOnly = "readonly";
	document.getElementById("dd_name_last").readOnly = "readonly";
	document.getElementById("dd_email").readOnly = "readonly";
	document.getElementById("dd_newsletter_1").disabled = "disabled";
	document.getElementById("dd_newsletter_2").disabled = "disabled";
	document.getElementById("dd_address_1").readOnly = "readonly";
	document.getElementById("dd_address_2").readOnly = "readonly";
	document.getElementById("dd_city").readOnly = "readonly";
	document.getElementById("dd_state_select").disabled = "disabled";
	document.getElementById("dd_postcode").readOnly = "readonly";
	document.getElementById("dd_phone").readOnly = "readonly";
	
	document.getElementById("dd_submit_btn").disabled = "disabled";
	
	// you don't really need to update the cart if it hasn't changed.
	if (stage == 1) {
		if (false) {
			stage = 2;
		}
	}
	
	if (stage == 1) {
		if (ajax_response_div === null) {
			ajax_response_div = document.getElementById("dd_submitting_msg");
			ajax_progress_msg = "Submitting...";
			ajax_error_msg = "Error.";
			
			var done = false;
			var vars = "";
			var totalItems = 0;
			
			for (var i = 0; i < 200 && !done; i++) {
				var element_id_holder = document.getElementById("cart_item_" + i + "_id");
				if (element_id_holder === null) {
					done = true;
				} else {
					var element_id = element_id_holder.value;
					
					if (document.getElementById("cart_item_" + i).style.display.toLowerCase() != "none") {
						qty = document.getElementById("product_" + element_id + "_qty").value;
						if (isNaN(parseFloat(qty))) {
							qty = 0;
						} else {
							qty = Math.abs(Math.floor(parseFloat(qty)));
						}
						
						vars += "&item_" + i + "_id=" + element_id;
						vars += "&item_" + i + "_qty=" + qty;
						
						totalItems += qty;
					}
				}
			}
			
			vars = "cartItems=" + (i - 1) + "&totalItems=" + totalItems + vars;
			
			AJAX_sendAndLoad("includes/ajax/updateCart.php", vars);
		}
	} else if (stage == 2) {
		document.getElementById("dd_submitting_msg").innerHTML = "Processing...";
		
		if (document.getElementById("dd_newsletter_1").checked) {
			document.getElementById("dd_newsletter").value = 1;
		} else {
			document.getElementById("dd_newsletter").value = 0;
		}
		document.getElementById("dd_state").value = document.getElementById("dd_state_select").value;
		
		document.getElementById("dd_form").submit();
	}
}

function showNewCartItem(item_number, item_id, item_qty) {
	var title = products_arr[item_id].title;
	var image = products_arr[item_id].image;
	var prices = calcPrices(item_id, item_qty);
	var totalPrice = prices.totalPrice;
	
	var item_div = document.createElement("div");
	item_div.id = "cart_item_" + item_number;
	item_div.style.margin = "2px 0 2px 0";
	item_div.style.backgroundColor = "#DDDDDD";
	item_div.style.position = "relative";
	
	var item_status_div = document.createElement("div");
	item_status_div.id = "cart_item_" + item_number + "_status";
	item_status_div.style.position = "absolute";
	item_status_div.style.width = "178px";
	item_status_div.style.height = "25px";
	item_status_div.style.top = "10px";
	item_status_div.style.left = "25px";
	item_status_div.style.backgroundColor = "#CC9999";
	item_status_div.style.textAlign = "center";
	item_status_div.style.display = "none";
	
	item_div.appendChild(item_status_div);
	
	var item_graphics_1_div = document.createElement("div");
	item_graphics_1_div.style.width = "232px";
	item_graphics_1_div.style.height = "4px";
	item_graphics_1_div.style.backgroundImage = "url(images/cart-item_01.jpg)";
	item_graphics_1_div.style.backgroundRepeat = "no-repeat";
	
	item_div.appendChild(item_graphics_1_div);
	
	var item_graphics_2_div = document.createElement("div");
	item_graphics_2_div.style.width = "232px";
	item_graphics_2_div.style.backgroundImage = "url(images/cart-item_02.jpg)";
	item_graphics_2_div.style.backgroundRepeat = "repeat-y";
	
	item_div.appendChild(item_graphics_2_div);
	
	var item_table = document.createElement("table");
	item_table.width = "100%"; 
	item_table.border = "0";
	item_table.cellPadding = "2";
	item_table.cellSpacing = "2";
	
	var item_table_row_1 = item_table.insertRow(0);
	
	var item_table_cell_1 = item_table_row_1.insertCell(0);
	item_table_cell_1.width = "50";
	item_table_cell_1.vAlign = "top";
	item_table_cell_1.innerHTML = "<img src=\"images/product_images/sample_50x50/" + image + "\" alt=\"" + title + "\" width=\"50\" height=\"50\" />";
		
	var item_table_cell_2 = item_table_row_1.insertCell(1);
	item_table_cell_2.vAlign = "top";
	item_table_cell_2.innerHTML = "<div id=\"cart_item_" + item_number + "_content\"><div style=\"color:#7E574F; font-size:13px;\">" + title + "</div>" + 
		"<div style=\"width:100%; height:0.75em;\"></div>" + 
		"<div>" + item_qty + " Box" + (item_qty > 1 ? "es" : "") + " - <strong>$" + totalPrice + "</strong> <span style=\"font-size:10px;\"><a href=\"#\" onclick=\"removeProductFromCart(" + item_number + "); return false;\">[remove]</a></span></div></div>";
	
	item_graphics_2_div.appendChild(item_table);
	
	var item_graphics_3_div = document.createElement("div");
	item_graphics_3_div.style.width = "232px";
	item_graphics_3_div.style.height = "4px";
	item_graphics_3_div.style.backgroundImage = "url(images/cart-item_03.jpg)";
	item_graphics_3_div.style.backgroundRepeat = "no-repeat";
	
	item_div.appendChild(item_graphics_3_div);
	
	document.getElementById("cart-items").appendChild(item_div);
	
	expandItem(item_div.id, false);
	
}

function updateCartItem(item_number, item_id, item_qty) {
	var title = products_arr[item_id].title;
	var prices = calcPrices(item_id, item_qty);
	var totalPrice = prices.totalPrice;
	
	var cart_item_content = document.getElementById("cart_item_" + item_number + "_content");
	cart_item_content.innerHTML = "<div style=\"color:#7E574F; font-size:13px;\">" + title + "</div>" + 
		"<div style=\"width:100%; height:0.75em;\"></div>" + 
		"<div>" + item_qty + " Box" + (item_qty > 1 ? "es" : "") + " - <strong>$" + totalPrice + "</strong> <span style=\"font-size:10px;\"><a href=\"#\" onclick=\"removeProductFromCart(" + item_number + "); return false;\">[remove]</a></span></div>";
	
	var item_div = document.getElementById("cart_item_" + item_number);
	
	if (cart_item_content.offsetHeight > 50) {
		item_div.style.height = (cart_item_content.offsetHeight + 16) + "px";
	} else {
		item_div.style.height = (50 + 16) + "px";
	}
}