package timeflow.format.field;

import java.net.URL;

import timeflow.data.time.*;

public abstract class FieldFormat
{
        protected String lastInput;
        protected Object lastValue;
        protected boolean understood = true;
        double value;

        void add(double x)
        {
                value += x;
        }

        void note(String s)
        {
                add(scoreFormatMatch(s));
        }

        protected abstract Object _parse(String s) throws Exception;

        public abstract String format(Object o);

        public abstract Class getType();

        public abstract double scoreFormatMatch(String s);

        public abstract String getHumanName();

        public void setValue(Object o)
        {
                lastValue = o;
                lastInput = o == null ? "" : format(o);
        }

        public Object parse(String s) throws Exception
        {
                lastInput = s;
                lastValue = null;
                understood = false;
                lastValue = _parse(s);
                understood = true;
                return lastValue;
        }

        public Object getLastValue()
        {
                return lastValue;
        }

        public String feedback()
        {
                if (!understood)
                {
                        return "Couldn't understand";
                }
                return lastValue == null ? "(missing)" : "Read: " + format(lastValue);
        }

        public boolean isUnderstood()
        {
                return understood;
        }
}