static void Main(string[] args)
{
try
{
#region Objects Declaration
double totalCostWithTax = 0.0;
double totalCostWithoutTax = 0.0;
Category category = new Category();
Book book = new Book();
Order orders = new Order();
#endregion
#region Setting Objects
var categories = category.AddCategory();
var booksList = book.AddBook();
var ordersList = orders.GetCustomerOrder();
#endregion
#region Calculations
foreach (var OrderItem in ordersList)
{
//Fetching the book and category for the orderitem
var bookItem = booksList.Find(b => b.Id == OrderItem.bookId);
var categoryitem = categories.Find(c => c.Id == bookItem.categoryId);
var unitPrice = bookItem != null ? bookItem.unitPrice : 0;
var discount = categoryitem != null ? categoryitem.discountPercentage : 0;
//Calculating the cost without Tax and delivery fee
totalCostWithoutTax += (OrderItem.quantity * unitPrice) - (discount * 0.01);
}
//Calculating the total cost with tax and delivery (if applicable)
totalCostWithTax = Utitliy.AddDeliveryFee(Utitliy.ApplyGST(totalCostWithoutTax));
//Adding the Delivery fee for the total cost without tax (if applicable)
totalCostWithoutTax = Utitliy.AddDeliveryFee(totalCostWithoutTax);
#endregion
#region Displaying Results
Console.WriteLine(string.Format("Total order Cost without Tax is: {0}", totalCostWithoutTax));
Console.WriteLine(string.Format("Total order Cost with Tax is: {0}", totalCostWithTax));
#endregion
}
catch (Exception ex)
{
//Logging of Exceptions (log4net) can be implemented.
throw ex;
}
}