import java.util.Scanner;
import java.util.Vector;

public class Main {

	Scanner scan = new Scanner(System.in);
	Vector<Items> vecItem = new Vector<Items>();

	public void clear()
	{
		for (int i = 0; i < 40; i++) {
			System.out.println();
		}
	}

	public void enter()
	{
		scan.nextLine();
		System.out.print("Press enter to Continue. . .");
		scan.nextLine();
	}

	public void menu()
	{
		System.out.println("Inventory Management System");
		System.out.println("=-=-=-=-=-=-=-=-=-=-=-=-=-=");
		System.out.println("1. View Items in Inventory");
		System.out.println("2. Add New Item to Inventory");
		System.out.println("3. Checkout Item from Inventory");
		System.out.println("4. Exit");
		System.out.print(">>> ");

	}
	public Main() {
		int choice = 0;
		do {
			clear();
			menu();
			choice = scan.nextInt();
			switch (choice) {
			case 1:
				if(vecItem.isEmpty())
				{
					clear();
					System.out.println("No Items in Inventory");
					enter();
				}
				else
				{
					clear();
					System.out.println("=================================");
					System.out.println("=   List Of items in Inventory  =");
					System.out.println("=================================");
					for (Items items : vecItem) {
						System.out.println("|" + items.getId() + "|" + items.getName() + "|" + items.getPrice() + "|" + items.getStock() +"|");
					}
					System.out.println("=================================");
					System.out.println();
					System.out.println();
					System.out.println();
					enter();
				}


				break;
			case 2:
			{
				clear();
				scan.nextLine();
				String tempid = "";
				String tempname = "";
				int tempprice = 0;
				int tempstock = 0;

				int WrongFormat = 0;
				do {
					WrongFormat = 0;
					System.out.print("Please Input Id [Must be exactly 5 numeric character] : ");
					tempid = scan.nextLine();
					WrongFormat = tempid.matches("^[0-9]+$") ? 0 : 1;
				} while (tempid.length() < 5 || tempid.length() > 5 || WrongFormat == 1);

				int WrongFormat1 = 0;
				int IdFound = 0;
				for (Items items : vecItem) {
					if(tempid.equals(items.getId()))
					{
						IdFound = 1;
						System.out.println("Item Already Exist");
						System.out.println("==================");
						System.out.println("Item ID : " + items.getId());
						System.out.println("Item Name : " + items.getName());
						System.out.println("Item Price : " + items.getPrice());
						System.out.println(">>Current item stock :" + items.getStock());
						do {
							WrongFormat1 = 0;
							try {
								System.out.print("Input Item Stock To be Added : ");
								tempstock = scan.nextInt();
							} catch (Exception e) {
								WrongFormat1 = 1;
								System.out.println("Must be numeric");
							}

						} while (WrongFormat1 == 1 || tempstock <= 0);
						tempstock = tempstock + items.getStock();
						items.setStock(tempstock);
						break;
					}
				}
				if(IdFound == 0)
				{
					do {
							System.out.print("Input Item Name [5 - 28] : ");
							tempname = scan.nextLine();
					} while (tempname.length() < 5 || tempname.length() > 28);
					do {
						WrongFormat1 = 0;
						try {
							System.out.print("Input Item Price [Min 10000] : ");
							tempprice = scan.nextInt();
						} catch (Exception e) {
							WrongFormat1 = 1;
							System.out.println("Must be numeric");
						}
					} while (tempprice < 10000 || WrongFormat1 == 1);
					do {
						WrongFormat1 = 0;
						try {
							System.out.print("Input Item Stock [Min 10] : ");
							tempstock = scan.nextInt();
						} catch (Exception e) {
							WrongFormat1 = 1;
							System.out.println("Must be numeric");
						}
					} while (tempstock > 10|| tempstock < 0 || WrongFormat1 == 1);
					vecItem.add(new Items(tempid, tempname, tempprice, tempstock));
					System.out.println();
					System.out.println();
					System.out.println("Success adding item to inventory");
				}
				enter();2
				break;
			}
			case 3:{
				if(vecItem.isEmpty())
				{
					System.out.println("No Items in Inventory");
					 scan.nextLine();
				}
				else
				{

					System.out.println("=================================");
					System.out.println("=   List Of items in Inventory  =");
					System.out.println("=================================");
					for (Items items : vecItem) {
						System.out.println("|" + items.getId() + "|" + items.getName() + "|" + items.getPrice() + "|" + items.getStock() +"|");
					}
					System.out.println("=================================");
					int WrongFormat = 0;
					int WrongFormat1 = 0;
					String tempid = "";
					int tempstock= 0;
					do {
						WrongFormat = 0;
						System.out.print("Please Input Id [Must be exactly 5 numeric character] : ");
						tempid = scan.nextLine();
						for (Items items : vecItem) {
							if(tempid.equals(items.getId()))
							{
								do {
									WrongFormat1 = 0;
									try {
										System.out.print("Input Item Stock [1-10]: ");
										tempstock = scan.nextInt();
									} catch (Exception e) {
										WrongFormat1 = 1;
										System.out.println("Must be numeric");
									}
								} while (tempstock > 10 ||tempstock < 0 || WrongFormat1 == 1);
								if(items.getStock() - tempstock < 0)
								{
									System.out.println("Cannot Checkout, Item is out of Stock!");
								}
								else
								{
									items.setStock(items.getStock()-tempstock);
									System.out.println("You have sold " + tempstock + " of " + items.getName() +" with revenue Rp." + (items.getPrice()*tempstock));
								}
								scan.nextLine();
								break;
							}
						}
					} while (tempid.length() < 5 || tempid.length() > 5 || WrongFormat == 1);
				}
				break;
			}
		}

		} while (choice != 4);
	}

	public static void main(String[] args) {
		new Main();

	}

}