public string BestCharge(List <string> inputs)
{
List <Item> allItems = itemRepository.FindAll();
List <SalesPromotion> allPromotions = salesPromotionRepository.FindAll();
string purchaseMsg = "============= Order details =============\n";
string promotionMsg = "-----------------------------------\n" +
"Promotion used:\n";
double savedMoney = 0;
double costMoney = 0;
double finalCost = 0;
string promotionItems = "";
string output = "";
foreach (string a in inputs)
{
var record = a.Split('x');
var id = record[0].Trim();
string name = "";
double number = double.Parse(record[1]);
double price = 0;
bool isOnSale = IsOnSale(id);
foreach (Item b in allItems)
{
if (id == b.Id)
{
name = b.Name;
price = b.Price;
if (isOnSale)
{
promotionItems += name;
savedMoney += b.Price * number * 0.5;
}
else
{
promotionMsg = "";
}
}
}
var recordPrice = price * number;
costMoney += recordPrice;
purchaseMsg += name + " x " + number + " = " + recordPrice + "\n";
}
finalCost = costMoney - savedMoney;
promotionMsg += promotionMsg + "(" + promotionItems + "), saving" + savedMoney + " yuan\n";
output = purchaseMsg + promotionMsg;
output += "Total: " + finalCost + "yuan\n" + "===================================";
return(output);
Console.WriteLine(output);
}
private List <FeasiblePromotion> GetPromotionScenarios(List <ItemWithCount> selectedItems)
{
List <SalesPromotion> promotionDataBase = salesPromotionRepository.FindAll();
List <FeasiblePromotion> possiblePromotions = new List <FeasiblePromotion>();
List <string> inputItems = new List <string>();
foreach (var item in selectedItems)
{
inputItems.Add(item.Id);
}
foreach (var promotion in promotionDataBase)
{
if (promotion.RelatedItems.Intersect(inputItems).Count() != 0)
{
FeasiblePromotion temp = new FeasiblePromotion();
temp.DiscountedIds = promotion.RelatedItems.Intersect(inputItems);
var discountItems = new List <ItemWithCount>();
foreach (var id in temp.DiscountedIds)
{
foreach (var j in selectedItems)
{
if (id == j.Id)
{
discountItems.Add(j);
}
}
}
temp.DiscountedItems = discountItems;
temp.DisplayName = promotion.DisplayName;
temp.Discount = Convert.ToDouble(promotion.Type.Substring(0, 2)) / 100;
possiblePromotions.Add(temp);
}
}
return(possiblePromotions);
}
public string BestCharge(List <string> inputs)
{
//var output = new StringBuilder();
var output = "";
output += "============= Order details =============\n";
var allItems = itemRepository.FindAll();
var allItemsDict = BuildItemFactoryDict(allItems);
var promoRules = salesPromotionRepository.FindAll();
var itemsDict = BuildItemsDict(inputs);
double totalPrice = CalculateTotalPrice(allItemsDict, itemsDict, ref output);
double totalPromoPrice = 0;
var promo = FindMostPromotedRule(promoRules, allItemsDict, itemsDict);
if (promo != null)
{
output += "-----------------------------------\n";
output += "Promotion used:\n";
var boughtPromoItems = promo.RelatedItems.Where(id => itemsDict.ContainsKey(id));
var promoInfo = $"{promo.DisplayName} ({boughtPromoItems.Select(id => allItemsDict[id].Name).Aggregate((a, b) => a + ", " + b)})";
var discount = ReadDiscountFromPromoType(promo.Type);
var promoPrice = boughtPromoItems.Select(id => allItemsDict[id].Price * itemsDict[id] * (1 - discount)).Sum();
totalPromoPrice += promoPrice;
output += $"{promoInfo}, saving {promoPrice} yuan\n";
}
output += "-----------------------------------\n";
output += $"Total：{totalPrice - totalPromoPrice} yuan\n";
output += "===================================";
return(output.ToString());
}
public string BestCharge(List <string> inputs)
{
//TODO: write code here
List <Item> foodList = itemRepository.FindAll();
List <SalesPromotion> promotionList = salesPromotionRepository.FindAll();
List <string> usePromotionList = new List <string>();
bool haveSalesPromotion = false;
List <FoodOrder> foodOrders = GenerateFoodOrder(foodList, inputs, promotionList, usePromotionList, ref haveSalesPromotion);
double originalTotalPrice = 0;
double totalPrice = 0;
string output = "============= Order details =============\n";
foreach (FoodOrder singleFoodOrder in foodOrders)
{
originalTotalPrice += singleFoodOrder.OriginalSutTotal;
totalPrice += singleFoodOrder.SutTotal;
output += singleFoodOrder.Name + " x " + singleFoodOrder.Count + " = " + singleFoodOrder.OriginalSutTotal + " yuan\n";
}
output += "-----------------------------------\n";
if (haveSalesPromotion)
{
output += "Promotion used:\n" + "Half price for certain dishes (";
foreach (string useName in usePromotionList)
{
output += useName + ", ";
}
output = output.Substring(0, output.Length - 2);
output += ")";
double savingMoney = originalTotalPrice - totalPrice;
output += ", saving " + savingMoney + " yuan\n";
output += "-----------------------------------\n";
}
output += "Total：" + totalPrice + " yuan\n" + "===================================";
return(output);
}
private bool ReductionExists(List <string> itemIdList, List <string> reductedItems)
{
List <SalesPromotion> promotionList = salesPromotionRepository.FindAll();
List <string> promotionItemList = promotionList[0].RelatedItems;
foreach (var element in itemIdList)
{
if (promotionItemList.Contains(element))
{
reductedItems.Add(element);
}
}
return(reductedItems.Count != 0);
}
public string BestCharge(List <string> inputs)
{
List <Item> items = itemRepository.FindAll();
List <SalesPromotion> salesPromotions = salesPromotionRepository.FindAll();
var inputsFull = inputs.Select(item => item.Split(' ')).Join(items, input => input[0], item => item.Id,
(input, item) => new
{
id = input[0],
name = item.Name,
count = int.Parse(input[2]),
price = item.Price
}).ToList();
var originPrice = inputsFull.Select(item => item.price * item.count).Aggregate((x, y) => x + y);
var originPriceDescription = inputsFull.Select(item => $"{ item.name} x {item.count} = {item.price * item.count} yuan\n").Aggregate($"============= Order details =============\n", (x, y) => x + y);
string savedPriceDescription = null;
double savedPrice = 0;
foreach (var salesPromotion in salesPromotions)
{
var savedItems = inputsFull.Join(salesPromotion.RelatedItems, input => input.id, related => related, (input, related) => input).ToList();
if (savedItems.Count == 0)
{
continue;
}
var promotionSavedPriceDescription = savedItems.Select(item => $"{item.name}, ").Aggregate((x, y) => x + y).TrimEnd(new char[] { ' ', ',' });
var promotionSavedPrice = savedItems.Select(item => item.price * item.count * 0.5).Aggregate((x, y) => x + y);
if (promotionSavedPrice > savedPrice)
{
savedPrice = promotionSavedPrice;
savedPriceDescription = promotionSavedPriceDescription;
}
}
var savingDescription = savedPriceDescription == null ?
$"-----------------------------------\n" +
$"Total：{originPrice} yuan\n" +
$"==================================="
: "-----------------------------------\n" +
"Promotion used:\n" +
$"{salesPromotions[0].DisplayName} ({savedPriceDescription}), saving {savedPrice} yuan\n" +
$"-----------------------------------\n" +
$"Total：{originPrice - savedPrice} yuan\n" +
$"===================================";
return($"{originPriceDescription}{savingDescription}");
}
//to do: imporve performance
public string BestCharge(List <string> inputs)
{
var avaliableItems = itemRepository.FindAll();
var avaliablePromotions = salesPromotionRepository.FindAll();
var itemInShoppingCart = new List <(Item item, double itemPrice)>();
var receipt = "============= Order details =============\n";
double totalPrice = 0;
foreach (var itemString in inputs)
{
var itemInfo = DeserializeInputStringToIdAndQuantity(itemString);
if (itemInfo == null)
{
continue;
}
var item = avaliableItems.Where(i => i.Id == itemInfo.Value.id).FirstOrDefault();
var itemPrice = item.Price * itemInfo.Value.quantity;
itemInShoppingCart.Add((item, itemPrice));
totalPrice += itemPrice;
receipt = receipt + $"{item.Name} x {itemInfo.Value.quantity} = {itemPrice} yuan\n";
}
var validPromotion = GetValidPromotion(itemInShoppingCart, avaliablePromotions);
if (validPromotion.Count != 0)
{
receipt = receipt + "-----------------------------------\n";
var bestDiscount = GetBestDiscount(itemInShoppingCart, avaliablePromotions);
receipt = receipt +
$"Promotion used:\n{bestDiscount.promotionName} ({bestDiscount.discountItems}), saving {bestDiscount.totalDiscount} yuan\n";
totalPrice = totalPrice - bestDiscount.totalDiscount;
}
receipt = receipt +
"-----------------------------------\n" +
$"Total：{totalPrice} yuan\n" +
"===================================";
return(receipt);
}
public string BestCharge(List <string> inputs)
{
string ret = "============= Order details =============\n";
var inputDict = new Dictionary <string, int>();
var savingList = new List <string>();
bool isUsingPromo = false;
double total = 0.0;
var itemDict = itemRepository.FindAll().ToDictionary(x => x.Id, x => x);
var promoList = salesPromotionRepository.FindAll();
var totalRelatedItems = promoList.SelectMany(x => x.RelatedItems).ToList();
foreach (var item in inputs)
{
var parsedStrings = item.Split(" ");
inputDict.Add(parsedStrings[0], Convert.ToInt32(parsedStrings[2]));
double subtotal = itemDict[parsedStrings[0]].Price * Convert.ToInt32(parsedStrings[2]);
total += subtotal;
ret += $"{itemDict[parsedStrings[0]].Name} x {parsedStrings[2]} = {(int)subtotal} yuan\n";
if (totalRelatedItems.Contains(parsedStrings[0]))
{
isUsingPromo = true;
}
}
ret += "-----------------------------------\n";
if (isUsingPromo)
{
ret += "Promotion used:\n";
double saving = 0.0;
string savingString = "";
SalesPromotion selectedCoupon = promoList[0];
foreach (var coupon in promoList)
{
var discount = 0.0;
var discountList = coupon.RelatedItems.Where(x => inputDict.ContainsKey(x));
if (!discountList.Any())
{
continue;
}
var currentSaving = discountList.Select(x => itemDict[x].Price * inputDict[x] * 0.5).Sum();
if (currentSaving > saving)
{
saving = currentSaving;
selectedCoupon = coupon;
}
}
savingList = selectedCoupon.RelatedItems.Where(x => inputDict.ContainsKey(x)).ToList();
foreach (var id in savingList)
{
if (savingList.IndexOf(id) == 0)
{
savingString += itemDict[id].Name;
}
else
{
savingString += ", " + itemDict[id].Name;
}
}
total -= saving;
ret += $"{promoList[0].DisplayName} ({savingString}), saving {(int)saving} yuan\n";
ret += "-----------------------------------\n";
}
ret += $"Total：{(int)total} yuan\n";
ret += "===================================";
return(ret);
}
public string BestCharge(List <string> inputs)
{
var sale = salesPromotionRepository.FindAll();
var saleItems = sale[0].RelatedItems;
var AllItems = itemRepository.FindAll();
List <string[]> itemList = new List <string[]>();
List <string[]> saledItemList = new List <string[]>();
double totalPrice = 0;
double savaPrice = 0;
string result = "============= Order details =============\n";
foreach (string orderString in inputs)
{
var itemId = orderString.Substring(0, 8);
var itemNumber = orderString.Substring(11, 1);
foreach (Item item in AllItems)
{
if (item.Id == itemId)
{
var information = new string[4] {
itemId, item.Name, itemNumber, item.Price.ToString()
};
itemList.Add(information);
result += item.Name + " x " + itemNumber + " = " + (item.Price * int.Parse(itemNumber)).ToString() + " yuan\n";
totalPrice += item.Price * int.Parse(itemNumber);
}
}
}
result += "-----------------------------------\n";
foreach (string[] orderedItem in itemList)
{
foreach (string saledItem in saleItems)
{
var itemSaledId = saledItem.Substring(0, 8);
if (itemSaledId == orderedItem[0])
{
saledItemList.Add(orderedItem);
savaPrice += int.Parse(orderedItem[2]) * int.Parse(orderedItem[3]) * 0.5;
}
}
}
if (saledItemList.Count > 0)
{
result += "Promotion used:\nHalf price for certain dishes (";
for (int k = 0; k < saledItemList.Count; k++)
{
if (k != 0)
{
result = result + ", " + saledItemList[k][1];
}
else
{
result += saledItemList[k][1];
}
}
result += "), saving ";
result += savaPrice + " yuan\n-----------------------------------\n";
}
totalPrice -= savaPrice;
result += "Total：" + totalPrice + " yuan\n===================================";
return(result);
}
public string BestCharge(List <string> inputs)
{
//TODO: write code here
List <Item> items = itemRepository.FindAll();
List <SalesPromotion> salesItemsList = salesPromotionRepository.FindAll();
List <string> salesItems = salesItemsList[0].RelatedItems;
string firstPartResult = "============= Order details =============\n";
string secondPartResult = "-----------------------------------\n" + "Promotion used:\n"
+ "Half price for certain dishes (";
double totalPrice = 0;
double totalSaving = 0;
int saleCount = 0;
foreach (string s in inputs)
{
string[] stringArray = s.Split(" x ");
string barcode = stringArray[0];
int number = Convert.ToInt32(stringArray[1]);
bool isSale = false;
for (int i = 0; i < salesItems.Count; i++)
{
if (barcode == salesItems[i])
{
isSale = true;
saleCount += 1;
}
}
double price = 0;
string name = "";
for (int j = 0; j < items.Count; j++)
{
if (barcode == items[j].Id)
{
price = items[j].Price;
name = items[j].Name;
}
}
if (isSale)
{
totalPrice += (number * price) / 2;
totalSaving += (number * price) / 2;
if (saleCount == 1)
{
secondPartResult += name;
}
else
{
secondPartResult += ", " + name;
}
}
else
{
totalPrice += number * price;
}
firstPartResult += name + " x " + number + " = " + number * price + " yuan\n";
}
secondPartResult += "), saving " + totalSaving + " yuan\n";
string thirdPartResult = "-----------------------------------\n" + "Total：" + totalPrice + " yuan\n" + "===================================";
if (saleCount > 0)
{
return(firstPartResult + secondPartResult + thirdPartResult);
}
else
{
return(firstPartResult + thirdPartResult);
}
}