package org.apidesign.exceptions.trycatchredo.usage;

import org.apidesign.exceptions.trycatchredo.api.UserQuestionException;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import javax.swing.JOptionPane;

public final class QueryStream extends OutputStream {

    private ByteArrayOutputStream arr = new ByteArrayOutputStream();

    /** this field can be manipulated by the QueryException */

    Boolean reverse;

    @Override

    public synchronized void write(byte[] b, int off, int len) throws IOException {

        if (reverse == null) {

            throw new QueryException();

        }

        arr.write(b, off, len);

    }

    @Override

    public synchronized void write(int b) throws IOException {

        if (reverse == null) {

            throw new QueryException();

        }

        arr.write(b);

    }

    @Override

    public String toString() {

        if (reverse == null) {

            return "Reverse question was not answered yet!";

        }

        if (reverse) {

            StringBuilder sb = new StringBuilder();

            sb.append(arr.toString());

            sb.reverse();

            return sb.toString();

        }

        return arr.toString();

    }

    private class QueryException extends UserQuestionException {

        @Override

        public JOptionPane getQuestionPane() {

            JOptionPane p = new JOptionPane("Store in reverse way?");

            p.setOptionType(JOptionPane.YES_NO_CANCEL_OPTION);

            return p;

        }

        @Override

        public void confirm(Object option) {

            if (option.equals(JOptionPane.YES_OPTION)) {

                reverse = Boolean.TRUE;

                return;

            }

            if (option.equals(JOptionPane.NO_OPTION)) {

                reverse = Boolean.FALSE;

                return;

            }

        }

    }

}