package com.j2medev.chapter8.bt;

import java.io.*;
import javax.bluetooth.*;
import javax.microedition.io.*;

public class BTServer implements Runnable {
    public static final String uuidString = "0123456789ABCDEF0123456789ABCDEF";
    public static UUID uuid;
    private LocalDevice localDevice;// 本地設備實例
    String localBTAddress;// 本地藍牙地址
    String localBTName;// 藍牙名稱
    BTServerUI ui;
    Thread th;
    Thread readWorkTh;
    Thread writeWorkTh;
    StreamConnectionNotifier notifier;
    private ServiceRecord record;
    StreamConnection conn;
    boolean exitFlag;
    boolean BTReady;
    DataInputStream in;
    DataOutputStream out;
    String sendText = "";
    
    public BTServer(BTServerUI ui) {
        this.ui = ui;
        th = new Thread(this);
        th.start();
    }
    
    public boolean initBT() {
        boolean success = false;
        try {
            uuid = new UUID(uuidString, false);// 我們的UUID
            // 取得本地設備實例
            localDevice = LocalDevice.getLocalDevice();
            // 設置服務器可發現，不成功則返回
            if (!localDevice.setDiscoverable(DiscoveryAgent.GIAC)) {
                return false;
            }
            // 記錄藍牙地址
            localBTAddress = localDevice.getBluetoothAddress();
            // 記錄藍牙名稱
            localBTName = localDevice.getFriendlyName();
            // //取得藍牙代理
            // agent=localDevice.getDiscoveryAgent();
            success = true;
            
        } catch (Exception e) {
            System.err.println("初始化藍牙設備失敗：" + e);
        }
        return success;
    }
    
    public void run() {
        if (!initBT()) {
            ui.state.setText("初始化失敗");
            return;
        }
        
        StringBuffer url = new StringBuffer("btspp://");
        url.append("localhost").append(':');
        url.append(uuid.toString());
        url.append(";name=p2pChatServer");
        url.append(";authorize=false");
        
        try {
            notifier = (StreamConnectionNotifier) Connector
                    .open(url.toString());
            record = localDevice.getRecord(notifier);
            ui.state.setText("等待客戶端連接");
            conn = notifier.acceptAndOpen();
            in = conn.openDataInputStream();
            out = conn.openDataOutputStream();
            readWorkTh = new ReadWorkThread();
            readWorkTh.start();
            writeWorkTh = new WriteWorkThread();
            writeWorkTh.start();
            ui.state.setText("就緒");
            BTReady = true;
        } catch (IOException e) {
            ui.state.setText("初始化失敗");
            return;
        } catch (SecurityException e) {
            ui.state.setText("初始化失敗");
            return;
        }
        th = null;
        System.out.println("bt thread stop");
    }
    
    public void close() {
        try {
            exitFlag = true;
            if (writeWorkTh != null) {
                synchronized (writeWorkTh) {
                    writeWorkTh.notify();
                }
            }
            if (in != null) {
                in.close();
            }
            if (out != null) {
                out.close();
            }
            if (conn != null)
                conn.close();
            if (readWorkTh != null)
                readWorkTh.join();
            if (writeWorkTh != null)
                writeWorkTh.join();
            if (notifier != null)
                notifier.close();
            if (th != null)
                th.join();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    
    public void send(String str) {
        if (writeWorkTh == null)
            return;
        sendText = str;
        synchronized (writeWorkTh) {
            writeWorkTh.notify();
        }
    }
    
    class ReadWorkThread extends Thread {
        public void run() {
            try {
                while (!exitFlag) {
                    String str = in.readUTF();
                    if (str != null) {
                        ui.receiveTF.setString(str);
                    }
                }
            } catch (IOException e) {
                if (!exitFlag)
                    ui.state.setText("讀取數據失敗");
            }
        }
    }
    
    class WriteWorkThread extends Thread {
        public void run() {
            try {
                while (!exitFlag) {
                    synchronized (this) {
                        try {
                            wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        if (exitFlag)// 可能因為關閉操作被打斷
                            break;
                        if (sendText != null)
                            out.writeUTF(sendText);
                    }
                }
            } catch (IOException e) {
                if (!exitFlag)
                    ui.state.setText("寫數據失敗");
            }
        }
    }
    
}