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)
{
countItems = new int[inputs.Count];//把input的每一个item对应数量记下来
List <Item> allItems = new List <Item>()
{
new Item("ITEM0001", "Braised chicken", 18.00),
new Item("ITEM0013", "Chinese hamburger", 6.00),
new Item("ITEM0022", "Cold noodles", 8.00),
new Item("ITEM0030", "coca-cola", 2.00),
};
List <Item> allInputItems = new List <Item>();
for (int i = 0; i < inputs.Count; i++)
{
var stringArray = inputs[i].Split();
foreach (Item item in allItems)
{
if (stringArray[0] == item.Id)
{
allInputItems.Add(item);
countItems[i] = int.Parse(stringArray[2]);
outputListString.Add(item.Name + " x " + stringArray[2] + " = " + (item.Price * countItems[i]) + " yuan");
}
// Console.WriteLine(allInputItems);
}
}
int countSingeItems = 0;
List <string> outputItems = new List <string>();
var ALL_SALES_PROMOTIONS = new List <SalesPromotion>();
SalesPromotion salesPromote = null;
foreach (int count in countItems)
{
if (count == 1)
{
countSingeItems += 1;
}
}
if (countSingeItems == 0)
{
outputItems.Add("");
for (int i = 0; i < countItems.Length; i++)
{
totalPrice += allInputItems[i].Price * countItems[i];
}
outputPromote += "Total：" + totalPrice + " yuan\n";
}
else
{
string promoteItemName = "";
//double maxPrice = 0.00;
for (int i = 0; i < countItems.Length; i++)
{
totalPrice += allInputItems[i].Price * countItems[i];
if (countItems[i] == 1)
{
outputItems.Add(allInputItems[i].Id);
//salesPromote.DisplayName+= inputItems[i].Name;
totalSavePrice += allInputItems[i].Price * 0.50;
promoteItemName += allInputItems[i].Name + ", ";
}
}
promoteItemName = promoteItemName.Remove(promoteItemName.Length - 2);
totalPrice -= totalSavePrice;
salesPromote = new SalesPromotion("50%_DISCOUNT_ON_SPECIFIED_ITEMS", promoteItemName, outputItems);
ALL_SALES_PROMOTIONS.Add(salesPromote);
outputPromote += "Promotion used:\n";
outputPromote += "Half price for certain dishes (" + promoteItemName + "), saving " + totalSavePrice + " yuan\n";
outputPromote += "-----------------------------------\nTotal：" + totalPrice + " yuan\n";
}
string output = "============= Order details =============\n";
foreach (string item in outputListString)
{
output += item + "\n";
}
output += "-----------------------------------\n";
output += outputPromote;
output += "===================================";
return(output);
}