/**
 * SEF Supermarket System
 * Student 1 : Michael Mansour s3509599
 * Student 2 :
 * Student 3 :
 * Student 4 : Zixi Zhang s3459799
 */
package Sale_staff;

import java.io.*;
import java.util.*;
import Sales.*;
import Utilities.*;

/**
 * @author Student :
 *
 */
public class Sale_Staff {

    private static PrintStream out = System.out;
    private BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
    private static final String username = "salestaff";
    private static final String password = "12345678";
    private List<transaction_info> trans_info = new ArrayList<transaction_info>();

    public Sale_Staff() throws FileNotFoundException, ClassNotFoundException, IOException{

        //Check Username & Password first
        if(Login.login(username, password)){
            loadItemInfo.loadtransactionInfo((ArrayList<transaction_info>) trans_info, "transaction_info.tmp");

            staffMenu();

            saveItemInfo.savetransactioninfo(trans_info, "transaction_info.tmp");

        }else
            out.println("\nusername or password incorrect!");

    }

    /**
     * Staff Menu contains 1. Remove items
     *                     2. Cancel Transaction
     */
    private void staffMenu() throws IOException{

        for(int i =0;i < trans_info.size();i++){
            for(int j=i+1;j < trans_info.size();j++){
                if(trans_info.get(i).get_customerid().equals(trans_info.get(j).get_customerid())){
                    trans_info.get(i).get_Cart().addAll(trans_info.get(j).get_Cart());
                    trans_info.remove(j);
                    j = i;
                }
            }
        }

        int selection;

        do{
            out.println("1. Remove item");
            out.println("2. Cancel transaction");
            out.println("3. Exit to main menu");
            out.println("Enter a number");

            selection = InputValidation.ValidateInt(bf.readLine());

            if (selection == 1){
                PrintList();
                removeitem();
            }
            else if (selection == 2){
                PrintList();
                Cancellation();
            }


        }while(selection != 3);


    }

    /**
     * Remove items implementation
     */
    private void removeitem() throws IOException{

        out.println("Select transaction number: ");
        int select = InputValidation.ValidateInt(bf.readLine()) - 1;

        try{
            transaction_info ti = trans_info.get(select);
            out.println("\n     Transaction Detail     \n");
            out.println("CustomerID: " + ti.get_customerid() + " Card: " + ti.get_CardNum() +
                    " Total Price: " + ti.get_totalPrice());
            out.println();

            List<Cart> cart = ti.get_Cart();

            if (cart.size() > 0){
                int j = 1;
                for(int i = 0;i < cart.size();i++){
                    out.println(j +" name : "+cart.get(i).getName() + " ID: " + cart.get(i).getID() + " price: " + cart.get(i).getPrice()
                    + " quantity: " + cart.get(i).getQuantity());
                    j++;
                }

                out.println("Select No. item to remove: ");
                int sel = InputValidation.ValidateInt(bf.readLine()) - 1;
                try{
                    cart.remove(sel);
                    out.println("Item has been deleted!!!");
                    trans_info.set(select, new transaction_info(ti.get_customerid(), ti.get_CardNum(), cart));
                }catch(IndexOutOfBoundsException ibe){
                    out.println("No. invalid!");
                }
            }else
                out.println("### NO ITEM IN LIST ###\n");

        }catch(IndexOutOfBoundsException iob){
            out.println("Number invalid!");
        }

    }

    /**
     * Cancel transactions implementation
     */
    private void Cancellation() throws IOException{

        out.println("Select transaction number: ");
        int select = InputValidation.ValidateInt(bf.readLine()) - 1;

        try{

            transaction_info ti = trans_info.remove(select);
            out.println(ti.get_customerid() + "'s transaction has been cancelled!\n");

        }catch(IndexOutOfBoundsException iob){
            out.println("Number invalid!");
        }

    }

    private void PrintList(){
        int i = 1;
        for(transaction_info t : trans_info){
            out.println(i + " CustomerID: " + t.get_customerid() + " Card: " + t.get_CardNum() +
                    " Total Price: " + t.get_totalPrice());
            out.println("\n     Cart Detail     \n");
            for(Cart c : t.get_Cart())
                if(c != null)
                    out.println("name : "+c.getName() + " ID: " + c.getID() + " price: " + c.getPrice()
                    + " quantity: " + c.getQuantity());
            out.println();
            i++;
        }

    }

}