package extractcommand.step09;

import extractcommand.step00.*;
import extractcommand.AtmCommand;

public class AtmSession {

    AccountService accountService;
    Logger logger;

    public AtmSession(AccountService accountService, Logger logger) {
        this.accountService = accountService;
        this.logger = logger;
    }

    public User checkOwner(final int accountNumber) throws SessionException {
        return new CheckOwner(logger, accountService, accountNumber).execute();
    }

    public Money checkBalance(final int accountNumber) throws SessionException {
        return new CheckBalance(accountNumber, logger, accountService).execute();
    }

    public Money deposit(final int accountNumber, final Money amount) throws SessionException {
        return new Deposit(accountNumber, amount, logger, accountService).execute();
    }

    public Money withdraw(final int accountNumber, final Money amount) throws SessionException {
        return new Withdraw(accountNumber, amount, logger, accountService).execute();
    }

    public void transfer(int fromAccountNumber, int toAccountNumber, Money amount) throws SessionException {
        try {
            Account fromAccount = accountService.findAccount(fromAccountNumber);
            Account toAccount = accountService.findAccount(toAccountNumber);
            verifyBalance(fromAccount, amount);
            fromAccount.withdraw(amount);
            toAccount.deposit(amount);
        }
        catch (AccountServiceException e) {
            logger.log(e);
            throw new SessionException(e);
        }
    }
    
    static void verifyBalance(Account account, Money amount) throws SessionException {
        Money balance = account.getBalance();
        if (balance.subtract(amount).isNegative()) {
            throw new SessionException("Insufficient funds");
        }
    }

}