package edu.cs4730.servicedemo;

import java.util.Random;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.Looper;
import android.os.Messenger;
import android.os.Process;
import android.os.Message;

import androidx.core.app.NotificationCompat;

import android.util.Log;
import android.widget.Toast;

public class myService extends Service {
    private Looper mServiceLooper;
    private ServiceHandler mServiceHandler;

    //my variables
    Random r;
    int NotID = 1;
    NotificationManager nm;

    // Handler that receives messages from the thread
    private final class ServiceHandler extends Handler {
        public ServiceHandler(Looper looper) {
            super(looper);
        }

        @Override
        public void handleMessage(Message msg) {
            // Normally we would do some work here, like download a file.
            // For our sample, we just sleep for 5 seconds.
            //setup how many messages
            nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            int times = 0, i;
            Messenger messenger = null;
            Bundle extras = msg.getData();


            if (extras != null) {
                times = extras.getInt("times", 0);
                messenger = (Messenger) extras.get("MESSENGER");
            }
            for (i = 0; i < times; i++) {
                synchronized (this) {
                    try {
                        wait(5000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                String info = i + " random " + r.nextInt(100);
                Log.d("intentServer", info);
                if (messenger != null) {
                    Message mymsg = Message.obtain();
                    mymsg.obj = info;
                    try {
                        messenger.send(mymsg);
                    } catch (android.os.RemoteException e1) {
                        Log.w(getClass().getName(), "Exception sending message", e1);
                    }
                } else {
                    //no handler, so use notification
                    makenoti(info);
                }
            }
            // Stop the service using the startId, so that we don't stop
            // the service in the middle of handling another job
            stopSelf(msg.arg1);
        }
    }

    @Override
    public void onCreate() {
        r = new Random();
        // Start up the thread running the service.  Note that we create a
        // separate thread because the service normally runs in the process's
        // main thread, which we don't want to block.  We also make it
        // background priority so CPU-intensive work will not disrupt our UI.
        HandlerThread thread = new HandlerThread("ServiceStartArguments", Process.THREAD_PRIORITY_BACKGROUND);
        thread.start();

        // Get the HandlerThread's Looper and use it for our Handler
        mServiceLooper = thread.getLooper();
        mServiceHandler = new ServiceHandler(mServiceLooper);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Toast.makeText(this, "service starting", Toast.LENGTH_SHORT).show();

        // For each start request, send a message to start a job and deliver the
        // start ID so we know which request we're stopping when we finish the job
        Message msg = mServiceHandler.obtainMessage();
        msg.arg1 = startId;//needed for stop.
        msg.setData(intent.getExtras());
        mServiceHandler.sendMessage(msg);

        // If we get killed, after returning from here, restart
        return START_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        // We don't provide binding, so return null
        return null;
    }

    @Override
    public void onDestroy() {
        Toast.makeText(this, "service done", Toast.LENGTH_SHORT).show();
    }

    public void makenoti(String message) {
        Notification noti = new NotificationCompat.Builder(getApplicationContext(), MainActivity.id)
            .setSmallIcon(R.drawable.ic_launcher)
            .setWhen(System.currentTimeMillis())  //When the event occurred, now, since noti are stored by time.
            .setContentTitle("Service")   //Title message top row.
            .setContentText(message)  //message when looking at the notification, second row
            .setAutoCancel(true)   //allow auto cancel when pressed.
            .build();  //finally build and return a Notification.

        //Show the notification
        nm.notify(NotID, noti);
        NotID++;
    }
}
