import java.util.Date;
import java.text.ParseException;
import java.text.DecimalFormat;
import java.text.DateFormat;

/**
    Superclass for all checkbook transactions, which are 'data storage' classes.

        @author Bert G. Wachsmuth
        @version Feb. 2002
*/
public class Transaction
{
    /**
        The MONEY_FORMAT object is used to format a decimal number as a string representing
        US dollars. See the <tt>java.text.DecimalFormat</tt> class for details.
    */
    private static final DecimalFormat MONEY_FORMAT = new DecimalFormat("$#,##0.00");
    /**
        The DATE_FORMAT object is used to format a <tt>Date</tt> object as a date suitable to the
        current locale. See the <tt>java.text.DateFormat</tt> class for details.
    */
    private static final DateFormat DATE_FORMAT = DateFormat.getDateInstance(DateFormat.SHORT);
    private String name;
    private double amount;
    private String date;
    private String type;

    protected static int numDeposits = 0;
    protected static int numChecks = 0;
    protected static int numAdmins = 0;

    /**
        Create a transaction with the given name, amount, date, and type. Note that the constructor
        attempts to parse a string representing a date, a process that may or may not succeed.
    */
    public Transaction(String name, double amount, String date, String type)
    {
        super();
        DATE_FORMAT.setLenient(false);
        this.name = name;
        this.amount = amount;
        try
        {
            this.date = toDate(DATE_FORMAT.parse(date));
        }
        catch(ParseException pe)
        {   this.date = "invalid";
        }
        this.type = type;
    }

    public double getAmount()
    {
        return amount;
    }

    public String getName()
    {
        return name;
    }

    public String getDate()
    {
        return date;
    }

    /**
        Static method to format a double as a string representing US dollars.
    */
    public static String toMoney(double d)
    {
        return MONEY_FORMAT.format(d);
    }

    /**
        Static method to format a date d in suitable form.
    */
    public static String toDate(Date d)
    {
        return DATE_FORMAT.format(d);
    }

    /**
        Returns a string representation of a transaction.
    */
    public String toString()
    {
        return toMoney(amount) + " - " + name + " on " + date + " (" + type +")";
    }
}