// Source File Name: Seafox.java

import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.*;
import java.util.Random;

public class Seafox extends Applet               //采用Runnable多線程接口
    implements Runnable {

    int m_nKeyBuffer[];
    Thread m_threadAnim;
    boolean m_bInitialized;
    static Random m_random = new Random();
    public static int m_nMouseX;
    public static int m_nMouseY;
    public static boolean m_bMouseInWindow;      //定義控制按鈕
    public static boolean m_bButtonDown;
    public static boolean m_bSpacebarPressed;
    final int m_nHistoryFrames = 10;
    public static int m_nFrameNumber;
    long m_lTime[];
    public static long m_lLatestTime;
    public static double m_dSecondsPerFrame;
    MediaTracker m_mediaTracker;
    Image m_imageLoading;
    public static int m_nWindowWidth;
    public static int m_nWindowHeight;
    public static int m_nPlayfieldWidth;
    public static int m_nPlayfieldHeight;
    public static Font m_fontScorePopup = new Font("Helvetica", 1, 24);
    public static final int SURFACE_HEIGHT = 60;
    public static final Color SURFACE_COLOR = new Color(0, 0, 128);
    public static final Color UNDERWATER_COLOR = new Color(0, 0, 64);
    Image m_bufferPlayfield;
    Image m_bufferSurface;
    Image m_imageWater;
    boolean m_bSoundEffectsOn;
    AudioClip m_acBigExplosion;
    AudioClip m_acLittleExplosion;
    AudioClip m_acFireTorpedo;
    AudioClip m_acOutOfTorpedoes;
    AudioClip m_acClank;
    AudioClip m_acSupplies;
    AudioClip m_acShark;
    AudioClip m_acSplash;
    public static boolean m_bPlayBigExplosion;
    public static boolean m_bPlayLittleExplosion;
    public static boolean m_bPlayFireTorpedo;
    public static boolean m_bPlayOutOfTorpedoes;
    public static boolean m_bPlayClank;
    public static boolean m_bPlaySupplies;
    public static boolean m_bPlayShark;
    public static boolean m_bPlaySplash;
    public static final int SCOREBAR_HEIGHT = 20;
    static final int SCOREBAR_BASELINE = 16;
    static final int SCOREBAR_FONT_SIZE = 14;
    static final int SCOREBAR_X_MARGIN = 4;
    static final int SCOREBAR_ZONES = 5;
    static final int SCOREBAR_MISSION_ZONE = 0;
    static final int SCOREBAR_SHIPS_SUNK_ZONE = 1;
    static final int SCOREBAR_SCORE_ZONE = 2;
    static final int SCOREBAR_TORPEDO_ZONE = 3;
    static final int SCOREBAR_FUEL_ZONE = 4;
    static final Color SCOREBAR_BACKGROUND_COLOR = new Color(0, 43, 128);
    static final Color SCOREBAR_CAPTION_COLOR = new Color(48, 128, 255);
    static final Color SCOREBAR_VALUE_COLOR = new Color(149, 184, 255);
    Image m_bufferScorebar;
    Font m_fontScorebar;
    int m_nScorebarZoneCaptionWidth[];
    int m_nScorebarZoneDataX[];
    int m_nScorebarZoneDataWidth[];
    int m_nScorebarZoneValue[];
    public static Player m_player = new Player();   // 定義類變量
    public static VerticalTorpedo m_verticalTorpedo = new VerticalTorpedo();
    public static HorizontalTorpedo m_horizontalTorpedo = new HorizontalTorpedo();
    public static CapitalShip m_capitalShip[] = new CapitalShip[10];
    public static HospitalShip m_hospitalShip[] = new HospitalShip[3];
    public static Destroyer m_destroyer[] = new Destroyer[3];
    public static DepthCharge m_depthCharge[] = new DepthCharge[3];
    public static EnemySub m_enemySub[] = new EnemySub[3];
    public static EnemyTorpedo m_enemyTorpedo[] = new EnemyTorpedo[3];
    public static MagneticMine m_magneticMine[] = new MagneticMine[3];
    public static SupplySub m_supplySub = new SupplySub();
    public static Dolphin m_dolphin = new Dolphin();
    public static Package m_package = new Package();
    public static KillerFish m_killerFish = new KillerFish();
    public static int m_nScore;
    public static int m_nMission = 1;
    public static int m_nSubsLeft = 3;
    public static int m_nTimesPlayed;
    public static boolean m_bMissionComplete;
    public static boolean m_bDisplayMissionTitle;
    public static boolean m_bGameOver;
    Font m_fontMessage;
    Color m_colorMessage;
    String m_stringStart;
    int m_nXstartString;
    int m_nYstartString;
    String m_stringOutOfFuel;
    int m_nXoutOfFuel;
    int m_nYoutOfFuel;
    String m_stringGameOver;
    int m_nXgameOver;
    int m_nYgameOver;
    String m_stringMissionTitle;
    int m_nXmissionTitle;
    int m_nYmissionTitle;
    String m_stringMissionComplete;
    int m_nXmissionComplete;
    int m_nYmissionComplete;
    String m_stringSubsLeft[];
    int m_nXsubsLeft[];
    int m_nYsubsLeft;

    private void MissionInit() {               //發射初始化
        CapitalShip.m_nShipsSunk = 0;
        int i = 0;
        do {                                     //隨機確定商船位置
            m_capitalShip[i].m_ndxImage = (m_random.nextInt() & 0x7fffffff) % 4;
            m_capitalShip[i].m_nStatus = 0;
            m_capitalShip[i].m_bSinkable = false;
            m_capitalShip[i].m_dXoffset = ((double)i + 0.69999999999999996D * (m_random.nextDouble() - 0.5D)) * (double)CapitalShip.m_nXspacing;
        } while(++i < 10);
        i = 0;
        do                                     //隨機確定救護位置
            m_hospitalShip[i].m_dXoffset = ((double)i + 0.69999999999999996D * (m_random.nextDouble() - 0.5D)) * (double)HospitalShip.m_nXspacing;
        while(++i < 3);
        switch(m_nMission) {
        case 1: // '\001'
            Destroyer.m_nShipLimit = 0;
            DepthCharge.m_nChargeLimit = 0;
            EnemySub.m_nSubLimit = 0;
            EnemyTorpedo.m_nTorpedoLimit = 0;
            MagneticMine.m_nMineLimit = 0;
            break;

        case 2: // '\002'
            Destroyer.m_nShipLimit = 3;
            DepthCharge.m_nChargeLimit = 3;
            EnemySub.m_nSubLimit = 0;
            EnemyTorpedo.m_nTorpedoLimit = 0;
            MagneticMine.m_nMineLimit = 0;
            break;

        case 3: // '\003'
            Destroyer.m_nShipLimit = 3;
            DepthCharge.m_nChargeLimit = 3;
            EnemySub.m_nSubLimit = 3;
            EnemyTorpedo.m_nTorpedoLimit = 0;
            MagneticMine.m_nMineLimit = 0;
            break;

        case 4: // '\004'
            Destroyer.m_nShipLimit = 3;
            DepthCharge.m_nChargeLimit = 3;
            EnemySub.m_nSubLimit = 3;
            EnemyTorpedo.m_nTorpedoLimit = 3;
            MagneticMine.m_nMineLimit = 0;
            break;

        case 5: // '\005'
            Destroyer.m_nShipLimit = 3;
            DepthCharge.m_nChargeLimit = 3;
            EnemySub.m_nSubLimit = 3;
            EnemyTorpedo.m_nTorpedoLimit = 3;
            MagneticMine.m_nMineLimit = 3;
            break;
        }
        m_stringMissionTitle = new String("Mission " + m_nMission);
        m_bDisplayMissionTitle = true;
    }

    public void start() {                           //啟動線程
        if(m_threadAnim == null) {
            m_threadAnim = new Thread(this);
            m_threadAnim.start();
        }
    }

    public void stop() {                              //終止線程
       if(m_threadAnim != null) {
            m_threadAnim.stop();
            m_threadAnim = null;
        }
    }

    public boolean keyUp(Event event, int i) {
        if(i == 32)
            m_bSpacebarPressed = false;
        return true;
    }

    public boolean mouseExit(Event event, int i, int j) {
        m_nMouseX = i;
        m_nMouseY = j;
        m_bMouseInWindow = false;
        m_bButtonDown = false;
        return true;
    }

    public boolean mouseMove(Event event, int i, int j) {
        m_nMouseX = i;
        m_nMouseY = j;
        m_bMouseInWindow = true;
        m_bButtonDown = false;
        return true;
    }

    public Seafox() {                                             //構造方法
        m_nKeyBuffer = new int[4];
        m_lTime = new long[10];
        m_mediaTracker = new MediaTracker(this);
        m_bSoundEffectsOn = true;
        m_nScorebarZoneCaptionWidth = new int[5];
        m_nScorebarZoneDataX = new int[5];
        m_nScorebarZoneDataWidth = new int[5];
        m_nScorebarZoneValue = new int[5];
        m_fontMessage = new Font("Helvetica", 1, 20);
        m_colorMessage = Color.white;
        m_stringStart = new String("Click Here to Start Game");
        m_stringOutOfFuel = new String("Out of Fuel");
        m_stringGameOver = new String("Game Over");
        m_stringMissionTitle = new String("Mission 0");
        m_stringMissionComplete = new String("Mission Complete");
        m_stringSubsLeft = new String[3];
        m_nXsubsLeft = new int[3];
    }

    public boolean mouseDown(Event event, int i, int j) {
        m_nMouseX = i;
        m_nMouseY = j;
        m_bButtonDown = true;
        return true;
    }

    public boolean keyDown(Event event, int i) {
        if(i == 32)
            m_bSpacebarPressed = true;
        if(i == 113 || i == 81)
            m_bSoundEffectsOn = false;
        if(i == 115 || i == 83)
            m_bSoundEffectsOn = true;
        return true;
    }

    public boolean mouseEnter(Event event, int i, int j) {
        m_nMouseX = i;
        m_nMouseY = j;
        m_bMouseInWindow = true;
        return true;
    }

    public boolean mouseDrag(Event event, int i, int j) {
        m_nMouseX = i;
        m_nMouseY = j;
        m_bMouseInWindow = true;
        return true;
    }

    private boolean UpdateScorebar() {               // 更新成績記錄
        Graphics g = m_bufferScorebar.getGraphics();
        g.setFont(m_fontScorebar);
        boolean flag = false;
        if(m_nMission != m_nScorebarZoneValue[0]) {
            flag = true;                                    //發射數
            g.setColor(SCOREBAR_BACKGROUND_COLOR);
            g.fillRect(m_nScorebarZoneDataX[0], 0, m_nScorebarZoneDataWidth[0], 20);
            g.setColor(SCOREBAR_VALUE_COLOR);
            g.drawString(new String("" + m_nMission), m_nScorebarZoneDataX[0], 16);
            m_nScorebarZoneValue[0] = m_nMission;
        }
        if(CapitalShip.m_nShipsSunk != m_nScorebarZoneValue[1]) {
            flag = true;                                       //擊中商船數
            g.setColor(SCOREBAR_BACKGROUND_COLOR);
            g.fillRect(m_nScorebarZoneDataX[1], 0, m_nScorebarZoneDataWidth[1], 20);
            g.setColor(SCOREBAR_VALUE_COLOR);
            g.drawString(new String("" + CapitalShip.m_nShipsSunk), m_nScorebarZoneDataX[1], 16);
            m_nScorebarZoneValue[1] = CapitalShip.m_nShipsSunk;
        }
        if(m_nScore != m_nScorebarZoneValue[2]) {           //計分
            flag = true;
            g.setColor(SCOREBAR_BACKGROUND_COLOR);
            g.fillRect(m_nScorebarZoneDataX[2], 0, m_nScorebarZoneDataWidth[2], 20);
            g.setColor(SCOREBAR_VALUE_COLOR);
            g.drawString(new String("" + m_nScore), m_nScorebarZoneDataX[2], 16);
            m_nScorebarZoneValue[2] = m_nScore;
        }
        if(Player.m_nTorpedoes != m_nScorebarZoneValue[3]) {
            flag = true;                               //剩魚雷數
            g.setColor(SCOREBAR_BACKGROUND_COLOR);
            g.fillRect(m_nScorebarZoneDataX[3], 0, m_nScorebarZoneDataWidth[3], 20);
            g.setColor(SCOREBAR_VALUE_COLOR);
            g.drawString(new String("" + Player.m_nTorpedoes), m_nScorebarZoneDataX[3], 16);
            m_nScorebarZoneValue[3] = Player.m_nTorpedoes;
        }
        if((int)(Player.m_dFuel + 0.5D) != m_nScorebarZoneValue[4]) {
            flag = true;                                       //燃料用量
            g.setColor(SCOREBAR_BACKGROUND_COLOR);
            g.fillRect(m_nScorebarZoneDataX[4], 0, m_nScorebarZoneDataWidth[4], 20);
            g.setColor(SCOREBAR_VALUE_COLOR);
            g.drawString(new String("" + (int)(Player.m_dFuel + 0.5D) + "%"), m_nScorebarZoneDataX[4], 16);
            m_nScorebarZoneValue[4] = (int)(Player.m_dFuel + 0.5D);
        }
        return flag;
    }

    private void StartNewGame() {
        m_bGameOver = false;
        m_bButtonDown = false;
        m_bPlayBigExplosion = false;
        m_bPlayLittleExplosion = false;
        m_bPlayFireTorpedo = false;
        m_bPlayOutOfTorpedoes = false;
        m_bPlayClank = false;
        m_bPlaySupplies = false;
        m_bPlaySplash = false;
        m_bPlayShark = false;
        m_nMission = 1;
        m_nSubsLeft = 3;
        m_nScore = 0;
        m_nTimesPlayed++;
        MissionInit();
        SubInit();
    }

    public boolean mouseUp(Event event, int i, int j) {