//Using arrays and function create a simple Inventory system(CRUD);

//Required output* in the terminal

//"1. Add Item

//2. Search Item

//3. Show Items

//4. Update Item

//5. Shop Items

//6. Exit"

//*Can vary as long as same context

//Include the required detail in the following:

//Item - Name, Brand, Quantity;

//Customer - Name, Cash;

//Only method calling/passing on the main function.

using System;

public class Program

{

    public static void Main()

    {

        menu();

    }

    static void menu(){

        int chosenOption =0;

        string[,] items = new string[5,3];

        string[] itemPrompt ={"Name", "Brand", "Quantity"};

        string[] customer = new string[1];

        string[] customerPrompt = {"Name", "Cash"};

        do{

        Console.WriteLine("\n---Welcome to this Simple Inventory System---\nPlease input number of chosen option: \n1. Add Item \n2. Search Item \n3. Show Items \n4. Update Items \n5. Shop Items \n6. Exit");

        Console.Write("Chosen Number: ");

        chosenOption = Convert.ToInt32(Console.ReadLine());

        switch(chosenOption){

            case 1:

                addItem(itemPrompt, items);

                break;

            case 2:

                searchItem(itemPrompt, items);

                break;

            case 3:

                showItem(itemPrompt, items);

                break;

            case 4:

                updateItem(itemPrompt, items);

                break;

            case 5:

                break;

            case 6:

                Console.WriteLine("----Goodbye, the transaction has ended----");

                break;

            default:

                break;

        }

        }while(chosenOption!=6);

    }

    static void addItem(string[] itemPrompt, string[,] items){

        Console.WriteLine("Add Item: ");

        int z=0;

        for(int x=0; x<5; x++){

            if(items[x,z]==null){

                for(int y=0; y<3; y++){

                    Console.Write($"{itemPrompt[y]}: ");

                    items[x,y]=Console.ReadLine();

​

                }

                Console.WriteLine("Continue? 1-Yes 2-No");

                Console.Write("Decision: ");

                int cont=Convert.ToInt32(Console.ReadLine());

                if(cont==2){

                    break;

                }

            }

        }

    }

    static void showItem(string[] itemPrompt, string[,] items){

        bool empty = true;

        Console.WriteLine("Show Item: ");

        for(int x=0; x<5; x++){

            for(int y=0; y<3; y++){

                if(items[x,y]!=null){

                    Console.Write($"{x+1}: {itemPrompt[y]}: ");

                    Console.WriteLine(items[x,y]);

                    empty = false;

                }

                else if(empty==true){

                    x=4;

                    Console.WriteLine("No items in inventory. Please add item.");

                    break;

                }

            }

        }

    }

    static void searchItem(string[] itemPrompt, string[,] items){

        int searchParam;

        Console.WriteLine("Search Item: ");

        Console.WriteLine("Please Enter Parameter to be searched: \n1. Name \n2. Brand \n3. Quantity ");

        Console.Write("Parameter Chosen(number): ");

        searchParam=Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("What is to be searched? ");

        string searchDetail = Console.ReadLine();

        switch(searchParam){

            case 1:

                for(int x=0; x<5; x++){

                    for(int y=0; y<3; y++){

                        if(items[x,0]==searchDetail){

                            Console.Write($"{x+1}: {itemPrompt[y]}: ");

                            Console.WriteLine(items[x,y]);

                        }

                    }

                    Console.WriteLine("------------");

                }

                break;

            case 2:

                for(int x=0; x<5; x++){

                    for(int y=0; y<3; y++){

                        if(items[x,1]==searchDetail){

                            Console.Write($"{x+1}: {itemPrompt[y]}: ");

                            Console.WriteLine(items[x,y]);

                        }

                    }

                    Console.WriteLine("------------");

                }

                break;

            case 3:

                for(int x=0; x<5; x++){

                    for(int y=0; y<3; y++){

                        if(items[x,2]==searchDetail){

                            Console.Write($"{x+1}: {itemPrompt[y]}: ");

                            Console.WriteLine(items[x,y]);

                        }

                        //try to show (no such item) when there is no result.

                    }

                    Console.WriteLine("------------");

                }

                break;

            default:

                break;

        }

    }

    static void updateItem(string[] itemPrompt, string[,] items){

        int updateParam;

        string updateDetail = "";

        Console.WriteLine("Update Item: ");

        Console.WriteLine("Please Enter Parameter to be updated: \n1. Name \n2. Brand \n3. Quantity \n4. All ");

        Console.Write("Parameter Chosen(number): ");

        updateParam=Convert.ToInt32(Console.ReadLine());

        Console.Write("What item should be updated?(number)");

        int numItem = Convert.ToInt32(Console.ReadLine());

        if(updateParam!=4){

            Console.WriteLine("What is the updated detail? ");

            updateDetail = Console.ReadLine();

        }

        switch(updateParam){

            case 1:

                if(items[numItem-1,0]!=null){

                    items[numItem-1,0]= updateDetail;

                }

                for(int y=0; y<3; y++){

                        Console.Write($"{numItem}: {itemPrompt[y]}: ");

                        Console.WriteLine(items[numItem-1,y]);

                }

                break;

            case 2:

                if(items[numItem-1,1]!=null){

                    items[numItem-1,1]= updateDetail;

                }

                for(int y=0; y<3; y++){

                        Console.Write($"{numItem}: {itemPrompt[y]}: ");

                        Console.WriteLine(items[numItem-1,y]);

                }

                break;

            case 3:

                if(items[numItem-1,2]!=null){

                    items[numItem-1,2]= updateDetail;

                }

                for(int y=0; y<3; y++){

                        Console.Write($"{numItem}: {itemPrompt[y]}: ");

                        Console.WriteLine(items[numItem-1,y]);

                }

                break;

            case 4:

                for(int y=0; y<3; y++){

                    if(items[numItem-1,y]!=null){

                        Console.Write($"{numItem}: {itemPrompt[y]}: ");

                        items[numItem-1,y]=Console.ReadLine();

                    }

                }

                for(int y=0; y<3; y++){

                        Console.Write($"{numItem}: {itemPrompt[y]}: ");

                        Console.WriteLine(items[numItem-1,y]);

                }

                break;

            default:

                break;

        }

    }

}