import java.applet.Applet;

import java.applet.AudioClip;

import java.awt.*;



public class TowerOfHanoi extends Applet {

    Hanoi aHanoi;

    AudioClip au;

    DrawRings aDrawRings;



    public void init() {



        aHanoi = new Hanoi();

        aHanoi.init(3);



        aDrawRings = new DrawRings(aHanoi);

//        DoHanoi aDoHanoi = new DoHanoi(aHanoi, aDrawRings);



        au = getAudioClip(getDocumentBase(), "EndOfWorld.au");

//        aDoHanoi.setEndOfWorldSound(au);



        setLayout(new BorderLayout());

        setBackground(Color.cyan);



        Panel panelNumOfRings = new Panel();

        panelNumOfRings.setLayout(new FlowLayout());



//        Label labelNumOfRings = new Label("リングの数 :");

        Label labelNumOfRings = new Label("Number Of Rings :");

        Choice choiceNumOfRings = new Choice();

        for (int i = 3; i <= 7; i++) {

            choiceNumOfRings.addItem(String.valueOf(i));

        }

//        choiceNumOfRings.addItemListener(aDoHanoi);

        panelNumOfRings.add(labelNumOfRings);

        panelNumOfRings.add(choiceNumOfRings);



        Panel panelNewGame = new Panel();

//        Button newGameButton = new Button("最初からやり直す");

        Button newGameButton = new Button("New Game");

//        newGameButton.addActionListener(aDoHanoi);

//        Button solveFromInitial = new Button("お手本を見る");

        Button solveFromInitial = new Button("Solved by computer");

//        solveFromInitial.addActionListener(aDoHanoi);

        panelNewGame.add(newGameButton);

        panelNewGame.add(solveFromInitial);



//        add(panelNumOfRings, "North");

//        add(aDrawRings, "Center");

//        add(panelNewGame, "South");

        add("North", panelNumOfRings);

        add("Center", aDrawRings);

        add("South", panelNewGame);

    }



    public boolean mouseDown(Event e, int x, int y) {

        if (!aHanoi.isEndOfWorld()) {

            try {

                int selectedTower = x / 200;

                int fromTower = aHanoi.selectedTower();



                if (fromTower < 0) {

                    aHanoi.markSelectedRing(selectedTower);

                } else {

                    aHanoi.moveRing(fromTower, selectedTower);

                    aHanoi.unmarkSelectedRing();

                }

            } catch (IllegalMovementException ex) {

                aHanoi.unmarkSelectedRing();

            } finally {

                aDrawRings.repaint();

            }

            if (aHanoi.isEndOfWorld()) {

                if (au != null) {

                    au.play();

                }

            }

        }

        return true;

    }



    public boolean action(Event e, Object o) {

        if (e.target instanceof Choice) {

            try {

                int numOfRings = Integer.parseInt((String)o);

                aHanoi.init(numOfRings);

                aDrawRings.repaint();

            } catch (NumberFormatException ex) {

            }

            return true;

        } else if (e.target instanceof Button) {

            if ("New Game".equals(o)) {

                int numOfRings = aHanoi.sizeOfTower(0) + aHanoi.sizeOfTower(1) + aHanoi.sizeOfTower(2);

                aHanoi.init(numOfRings);

                aDrawRings.repaint();

            } else if ("Solved by computer".equals(o)) {

                int numOfRings = aHanoi.sizeOfTower(0) + aHanoi.sizeOfTower(1) + aHanoi.sizeOfTower(2);

                aHanoi.init(numOfRings);

                aDrawRings.repaint();

                SolveHanoiThread aSolveHanoiThread = new SolveHanoiThread(aHanoi, aDrawRings);

                if (au != null) {

                    aSolveHanoiThread.setSound(au);

                }

                aSolveHanoiThread.start();

            } else {

            }

        }

        return false;

    }

}





class SolveHanoiThread extends Thread {

    Hanoi aHanoi;

    DrawRings aDrawRings;

    AudioClip au = null;



    public SolveHanoiThread(Hanoi aHanoi, DrawRings aDrawRings) {

        this.aHanoi = aHanoi;

        this.aDrawRings = aDrawRings;

    }



    public void setSound(AudioClip au) {

        this.au = au;

    }



    public void run() {

        int numOfRings = aHanoi.sizeOfTower(0) + aHanoi.sizeOfTower(1) + aHanoi.sizeOfTower(2);

        solveFromInitial(numOfRings, 1, 2, 3);

        if (au != null && aHanoi.isEndOfWorld()) {

            au.play();

        }

        stop();

    }



    void solveFromInitial(int numOfRings, int from, int to, int another) {

        try {

            if (numOfRings == 1) {

                aHanoi.moveRing(from-1, to-1);

                sleep(1000);

                aDrawRings.repaint();

            } else {

                solveFromInitial(numOfRings - 1, from, another, to);

                aHanoi.moveRing(from-1, to-1);

                sleep(1000);

                aDrawRings.repaint();

                solveFromInitial(numOfRings - 1, another, to, from);

            }

        } catch (IllegalMovementException ex1) {

//            System.out.println(ex1.getLocalizedMessage());

        } catch (InterruptedException ex2) {

        }

    }

}