Shop Project (Beta)

using System;

namespace SchoolProject
{
    class Program
    {
        static void Main(string[] args)
        {
            int tamMax = 100;

            // list/arrays that will old the data
            String[] nome = new String[tamMax];
            double[] quanto = new double[tamMax];
            double[] preco = new double[tamMax];
            Boolean[] feito = new Boolean[tamMax];

            // TODO: available item names. (review)
            string[] names = { "leite", "ovos", "macas", "azeite" };
            double[] prices = { .57, 1.99, 1.20, 4.29 };

            // tracker (this variable will track how many item is already in the list)
            int itemCount = 0;

            do
            {
                Console.Clear();
                // display available items:
                // print the header
                Console.WriteLine($"{"Item",-10}{"Name",-10}{"price",-10}{"bought",-10}");

                for (int i = 0; i < names.Length; i++)
                {
                    Console.WriteLine($"{i,-10}{names[i],-10}{prices[i],-10}{(feito[i] ? "x" : ""),-10}");
                }

                Console.WriteLine();

                Console.WriteLine("(E)ditar lista.");
                Console.WriteLine("(F)azer compras.");
                Console.WriteLine("Fazer(c)ontas.");
                Console.WriteLine("(S)air");
                Console.WriteLine();

                // this varaible can be reused with other operations too!
                char ch = Console.ReadKey().KeyChar;

                switch (ch)
                {
                    case 'e': // editar list

                        // print list edit operations
                        Console.WriteLine("(I)nserir item no fim da lista.)");
                        Console.WriteLine("Inserir item na(p)osição n da lista.");
                        Console.WriteLine("(A)pagar último item inserido na lista.");
                        Console.WriteLine("Apagar item na posição(n) da lista.");
                        Console.WriteLine("(A)pagar itens da posição m à n da lista.");
                        Console.WriteLine("(L)istar todos os itens.");
                        Console.WriteLine("(V)oltar.");
                        Console.WriteLine();

                        // todo: remove remaining char (user input)
                        ch = Console.ReadKey().KeyChar;
                        Console.WriteLine();

                        // control edit list operations
                        switch (ch)
                        {
                            case 'i':

                                // e.g: 0 for leite, 1 for ovos...
                                Console.WriteLine("Enter item index:");

                                // this will be the index/position of the item in printed list
                                var index = int.Parse(Console.ReadLine());

                                // get the name of the item from the list
                                string name = names[index];

                                // check if item doesn't already exits in list, if it does, only update the quantity

                                // todo: validation, in case user enter something other than number
                                Console.WriteLine("Quanto:");
                                double quantity = double.Parse(Console.ReadLine());

                                // update name, quantity, price,
                                double price = quantity * prices[index];

                                // update items
                                names[index] = name;
                                quanto[index] = quantity;
                                preco[index] = price;
                                feito[index] = false;

                                // print info of the item that was just addedi in the list

                                Console.WriteLine($"{names[index],-10}{quanto[index],-10}{preco[index] * quanto[index],-10}");
                                Console.WriteLine("Added to the list!");
                                Console.ReadLine();

                                break;

                            case 'l':
                                // this is not clear enough, which items? that one that is being sold or items in bag-list?
                                Console.WriteLine("Listar(t)odos os itens.");
                                Console.WriteLine("Listar itens(c)omprados.");
                                Console.WriteLine("Listar itens(p)or comprar.");
                                ch = Console.ReadKey().KeyChar;

                                switch (ch)
                                {
                                    case 't':
                                        for (int i = 0; i < itemCount; i++)
                                        {
                                            Console.WriteLine($"{names[i],-10}{quanto[i],-10}{(feito[i] ? "x" : ""),-10}");
                                        }
                                        break;

                                    case 'c':
                                        for (int i = 0; i < itemCount; i++)
                                        {
                                            // item bought!
                                            if (feito[i] == true)
                                            {
                                                continue;
                                            }
                                            Console.WriteLine($"{names[i],-10}{quanto[i],-10}{(feito[i] ? "x" : ""),-10}");
                                        }
                                        break;

                                    case 'p':
                                        for (int i = 0; i < itemCount; i++)
                                        {
                                            // item not bought!
                                            if (feito[i] == false)
                                            {
                                                continue;
                                            }
                                            Console.WriteLine($"{names[i],-10}{quanto[i],-10}{(feito[i] ? "x" : ""),-10}");
                                        }
                                        break;
                                }
                                break;

                            default:
                                Console.WriteLine("you entered invalid input!");
                                break;
                        }

                        break;

                    // fazer compras
                    case 'f':
                        Console.WriteLine("(M)arcar primeiro item por comprar.");
                        Console.WriteLine("(D)esmarcar primeiro item comprado.");
                        Console.WriteLine("Trocar estado por(n)ome.");
                        Console.WriteLine("Trocar estado por(p)osição.");
                        Console.WriteLine("(L)istar.");
                        Console.WriteLine("(V)oltar.");

                        ch = Console.ReadKey().KeyChar;
                        switch (ch)
                        {
                            case 'm': // undone
                                feito[0] = true;
                                break;

                            case 'd': // undone
                                feito[0] = false;
                                break;

                            case 'n':

                                // print out the message for user to enter the item name
                                Console.WriteLine("Enter the name of the item: ");

                                // read the name of the item
                                string itemName = Console.ReadLine();

                                // get item by name and chnage the state
                                // - find the item index in list
                                // - use the index to update the state of the item
                                for (int i = 0; i < itemCount; i++)
                                {
                                    // find the name that matched the name of the item
                                    if (names[i] == itemName)
                                    {
                                        // invert the state from true/false vice-versa
                                        feito[i] = !feito[i];
                                    }
                                }
                                break;

                            // change item state by position/index
                            case 'p':
                                Console.WriteLine("Enter item position: ");

                                // note: handle the validation / parsing correctly
                                int position = int.Parse(Console.ReadLine());

                                // invalid position
                                if (position < 0 || position > itemCount)
                                {
                                    Console.WriteLine("Position out of boundary");
                                }

                                // change item status
                                feito[position] = !feito[position];

                                // TODO: Mabye display a message of state changed

                                break;

                            case 'l': // print items

                                // display items available for sale
                                Console.WriteLine($"{"Item",-10}{"Name",-10}{"price",-10}{"bought",-10}");
                                for (int i = 0; i < names.Length; i++)
                                {
                                    Console.WriteLine($"{i,-10}{names[i],-10}{prices[i],-10}{(feito[i] ? "x" : ""),-10}");
                                }
                                break;

                            case 'v': // done
                                break;
                        }

                        break;

                    // control fazer contas
                    case 'c':
                        Console.WriteLine("Quanto custa a (l)ista?"); // these are all the item inthe list
                        Console.WriteLine("Quanto já (g)astei?"); // these are the item marked as "feito=true"
                        Console.WriteLine("Quanto custa o que (f)alta comprar?");
                        Console.WriteLine("Qual o preço (m)édio por item?"); // this item[i...n].price (added)  /  i...n
                        ch = Console.ReadKey().KeyChar;

                        double totalPrice = 0;

                        switch (ch)
                        {
                            // total amount the whole list is worth, (note: this includes bought and not bought item in the list)
                            case 'a':

                                for (int i = 0; i < itemCount; i++)
                                {
                                    // don't process, it's not yet bought!
                                    if (feito[i] == false)
                                    {
                                        continue;
                                    }

                                    // get total price for each item
                                    double itemPrice = 0; // this is the quantity * price

                                    // update total price
                                    totalPrice += itemPrice;
                                }

                                Console.WriteLine("The list is worth: " + totalPrice);
                                break;

                            // total amount wasted in shop
                            case 'g':
                                for (int i = 0; i < itemCount; i++)
                                {
                                    // filter only item with feito = true

                                    // get total price for each item
                                    double itemPrice = 0; // this is the quantity * price

                                    // update total price
                                    totalPrice += itemPrice;
                                }
                                Console.WriteLine("The list is worth: " + totalPrice);
                                break;

                            case 'm':
                                // TODO: add implementation
                                break;
                        }

                        break;

                    case 's': // exit application
                        return;
                }

            } while (true);

            // TODO: add control statement which will exit the loop
        }
    }
}