using CarClassLibrary;

using System;

using System.IO;

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​

namespace CarShopConsoleApp

{

    class Program

    {

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        static void Main(string[] args)

        {

            Store s = new Store();

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            Console.WriteLine("Welcome to the Car Store. First you must create some car inventory. \nThen you may add some cars to the shopping cart. \nFinally you may checkout which will give you a total value of the shopping cart.\n");

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            int action = chooseAction();

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            while (action != 0)

            {

                Console.WriteLine("\nYou chose " + action);

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                switch (action)

                {

                    // Add item to inventory

                    case 1:

                        Console.WriteLine("\nYou choose to add a new car to the inventory");

                        string carMake = "";

                        string carModel = "";

                        string carColour = "";

                        Decimal carEngineSize = 0;

                        Decimal carPrice = 0;

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                        Console.WriteLine("\nWhat is the car make?, Ford,  GM, Nissan... etc.");

                        carMake = Console.ReadLine();

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                        Console.WriteLine("\nWhat is the car model? , Corvette, Focus, Ranger etc...");

                        carModel = Console.ReadLine();

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                        Console.WriteLine("\nWhat is the colour of the car?");

                        carColour = Console.ReadLine();

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                        Console.WriteLine("\nWhat is the engine size? eg 1.2");

                        carEngineSize = Decimal.Parse(Console.ReadLine());

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                        Console.WriteLine("\nWhat is the car price?");

                        carPrice = int.Parse(Console.ReadLine());

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                        Car newCar = new Car(carMake, carModel, carColour, carEngineSize, carPrice);

                        s.CarList.Add(newCar);

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                        printInventory(s);

                        break;

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                    // add to cart

                    case 2:

                        Console.WriteLine("\nyou chose to add a car to your shopping cart");

                        printInventory(s);

                        Console.WriteLine("\nWhich item, would you like to buy? (number)");

                        // Fix this with this video: https://www.youtube.com/watch?v=zx2kSJHQxwc point 2. To do:

                        // 1) Research try catch to stop string entered whe numbers expected and visa versa. -- COMPLETE

                        // 2) Stop users choosing a car number out of range when trying to select car to add to cart. -- COMPLETE

​

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                        try

                        {

                            int carChosen = int.Parse(Console.ReadLine());

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                            s.ShoppingList.Add(s.CarList[carChosen]);

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                            printShoppingCart(s);

                        }

                        catch (Exception ex)

                        {

                            Console.WriteLine("** EXCEPTION:\n" + ex + "**" + "\n\nError. Input was not of the range of cars expected. Please enter a number from the list of cars and try again\n");

                        }

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                        break;

​

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                    case 3:

                        printShoppingCart(s);

                        Console.WriteLine("\nThe total cost of your items is : $" + s.Checkout());

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                        break;

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                    default:

                        break;

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                }

                action = chooseAction();

            }

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​

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        }

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        private static void printShoppingCart(Store s)

        {

            Console.WriteLine("\nCars you have chosen to buy");

            for (int i = 0; i < s.ShoppingList.Count; i++)

            {

                Console.WriteLine("\nCar # " + i + " " + s.ShoppingList[i]);

            }

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        }

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        private static void printInventory(Store s)

        {

            for (int i = 0; i < s.CarList.Count; i++)

            {

                Console.WriteLine("\nCar # " + i + " \n" + s.CarList[i] + "\n");

            }

        }

​

​

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        static public int chooseAction() // @PAUL this is where aids is but putting return null; hasn't been working and i really cant figure out what i've done. It's me being thick, clearly.

        {

            // declare outside of try catch so you can return outside of try catch

            int choice;

            try

            {

                Console.WriteLine("Choose an action: \n(0) to quit\n(1) to add a new car to inventory\n(2) add car to cart\n(3) to checkout");

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                //sets the value if successful

                choice = int.Parse(Console.ReadLine());

                // int.Parse will cause the program to crash if the user types something other than an integer. use try {} catch {} to prevent an application crash **GOOGLE THESE!!**

            }

            catch (Exception ex)

            {

                Console.WriteLine("Please enter a numeric value");

                //if not successful, sets to an invalid choice so that the program will ask again.

                choice = -1;

            }

            //returns the choice (or invalid one if it fails) 

            return choice;

        }

        // another way, doesn't need try catch

        static public int chooseActionPaulStyle()

        {

            Console.WriteLine("Choose an action: \n(0) to quit\n(1) to add a new car to inventory\n(2) add car to cart\n(3) to checkout");

            //declare outside of the if so that you can try to assign to it

            int choice;

            //Parse throws an exception if it fails, but TryParse tries to parse it

            //and assign it to the "out" parameter - true if the parse works, false if it doesn't

            if (int.TryParse(Console.ReadLine(), out choice))

            {

                //it worked, so return it

                return choice;

            }

            //it didn't work, so return the -1 invalid value

            return -1;

        }

    }

}

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