import java.io.*;
import java.util.ArrayList;
import java.util.InputMismatchException;
import java.util.Scanner;

public class Menu {
    File fi = new File("/home/ahmednegm/Desktop/Practical2/input.txt");
    BufferedWriter fw = new BufferedWriter(new FileWriter("/home/ahmednegm/Desktop/Practical2/output.txt"));
Scanner in = new Scanner(fi);
Bank bank = new Bank();
boolean exit;

    public Menu() throws IOException {
    }

    public static void main(String[] args) throws IOException {
        Menu menu = new Menu();
        menu.runMenu();
    }
    public void runMenu() throws IOException {
        String welcome = " ********************************\n *                              *\n *     Welcome to our Bank      *\n *                              *\n ********************************\n";
        fw.write(welcome);
        int startAccounts ;
        while(true) {
            System.out.print("How many Accounts you want to create?: ");
            startAccounts = in.nextInt();
            if(startAccounts >0){
                break;
            }else{
                System.out.println("You should enter a positive number.");
            }

        }
        for (int i=0; i<startAccounts;i++){
            System.out.println("Enter the information for account no."+(i+1)+".");
            CreateAnAccount();
        }
        while(!exit){

            System.out.println("Please make a selection:");
            System.out.println("1) Create a new Account.");
            System.out.println("2) Make a Deposit.");
            System.out.println("3) Make a Withdrawal.");
            System.out.println("4) List account balance.");
            System.out.println("0) Exit.");
            int choice = -1;
            do {
                System.out.print("Enter your choice:");
                try {
                    choice = in.nextInt();
                }catch (InputMismatchException e){
                    System.out.println("Invalid selection, Numbers only.");
                    in.next();
                    continue;
                }
                if(choice <0 || choice >4) System.out.println("Choice out of range, Choose again.");
            }while (choice <0 || choice >4);

            switch (choice){
                case 0:
                    System.out.println("Thank you for using our Bank.");
                    System.exit(0);
                    break;
                case 1:
                    CreateAnAccount();
                    break;
                case 2:
                    MakeADeposit();
                    break;
                case 3:
                    MakeAWithdrawal();
                    break;
                case 4:
                    ListBalances();
                    break;
                default:
                    System.out.println("Unknown Error.");
            }
        }
    }




    private void CreateAnAccount() {
        String firstname,lastname,pass,accountType = null;
        double initialDeposit = 0;
        boolean valid = false;
        while (!valid){
            System.out.print("Please enter an account type (checking / savings):");
            accountType = in.next();
            in.nextLine();
            if(accountType.equalsIgnoreCase("checking") || accountType.equalsIgnoreCase("savings")){
                valid = true;
            }else{
                System.out.println("Invalid account type selected, enter checking or savings.");
            }
        }
        System.out.print("Enter your first name : ");
        firstname = in.next();
        in.nextLine();
        System.out.print("Enter your last name : ");
        lastname = in.next();
        in.nextLine();
        System.out.print("Enter your password : ");
        pass = in.next();
        in.nextLine();
        valid = false;
        while(!valid){
            System.out.print("Please enter an initial deposit : ");
            try {
                initialDeposit = in.nextDouble();
            }catch (InputMismatchException e){
                System.out.println("Deposit must be a number.");
                in.next();
            }
            if (accountType.equalsIgnoreCase("checking")){
                if(initialDeposit < 100){
                    System.out.println("checking account require a minimum of of $100 to open.");
                }else{
                    valid = true;
                }
            }else if (accountType.equalsIgnoreCase("savings")){
                if(initialDeposit < 50){
                    System.out.println("checking account require a minimum of of $50 to open.");
                }else{
                    valid = true;
                }
            }
    }
        Account account;
        if(accountType.equalsIgnoreCase("checking")){
            account = new Checking(initialDeposit);
        }else{
            account = new Savings(initialDeposit);
        }
        Customer customer = new Customer(firstname,lastname,pass,account);
        bank.addCustomer(customer);


    }
    private void MakeADeposit() {
        int account = selectAccount();
        if(account >=0) {
            System.out.print("How much would you like to deposit? : ");
            double amount = 0;
            amount = in.nextDouble();
            bank.getCustomer(account).getAccount().deposit(amount);
        }

    }
    private void MakeAWithdrawal() {
        int account = selectAccount();
        if(account >=0) {
            System.out.print("How much would you like to withdraw? : ");
            double amount = 0;
            amount = in.nextDouble();
            bank.getCustomer(account).getAccount().withdraw(amount);
        }
    }
    private void ListBalances() throws IOException {
        int account = selectAccount();
        if(account >=0) {
            String info= null;
            info= String.valueOf((bank.getCustomer(account).getAccount()));
            fw.write(info);
            fw.close();
        }
    }
    private int selectAccount() {
        ArrayList<Customer> customers = bank.getCustomers();
        if(customers.size() <= 0){
            System.out.println("No customers at the bank.");
            return -1;
        }
        System.out.println("Select an account: ");
        for (int i=0; i<customers.size(); i++){
            System.out.println((i+1) +") " +customers.get(i).basicInfo());
        }
        int account =0;
        System.out.print("Please enter your selection: ");
        account = in.nextInt()-1;
        if(account >= customers.size() || account < 0){
            System.out.println("Invalid Customer.");
            return -1;
        }
        return account;
    }


}