/*
 * Geopaparazzi - Digital field mapping on Android based devices
 * Copyright (C) 2016  HydroloGIS (www.hydrologis.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package eu.geopaparazzi.library.sms;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.provider.Telephony;
import android.telephony.SmsMessage;

import eu.geopaparazzi.library.R;
import eu.geopaparazzi.library.database.GPLog;
import eu.geopaparazzi.library.util.LibraryConstants;

/**
 * Sms reciever and gps coordinates sender.
 * <p/>
 * <p/>
 * To use this you will need to add to the manifest:
 * <p/>
 * <pre>
 *      <receiver android:name="eu.geopaparazzi.library.sms.SmsReceiverPositionSender" android:enabled="true">
 *           <intent-filter>
 *               <action android:name="android.provider.Telephony.SMS_RECEIVED" />
 *           </intent-filter>
 *       </receiver>
 * </pre>
 *
 * @author Andrea Antonello (www.hydrologis.com)
 */
@SuppressWarnings("nls")
public class SmsReceiverPositionSender extends BroadcastReceiver {
    private static final String SMS_REC_ACTION = "android.provider.Telephony.SMS_RECEIVED"; //$NON-NLS-1$

    @Override
    public void onReceive(final Context context, Intent intent) {
        if (intent.getAction().equals(SmsReceiverPositionSender.SMS_REC_ACTION)) {

            SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
            boolean doCatch = preferences.getBoolean(LibraryConstants.PREFS_KEY_SMSCATCHER, false);
            if (!doCatch) {
                return;
            }

            boolean isGeopapsms = false;

            Bundle bundle = intent.getExtras();
            String body = null;
            SmsMessage smsMessage = null;
            if (bundle != null) {
                if (Build.VERSION.SDK_INT >= 19) { //KITKAT
                    SmsMessage[] msgs = Telephony.Sms.Intents.getMessagesFromIntent(intent);
                    smsMessage = msgs[0];
                } else {
                    Object tmp = bundle.get("pdus");
                    if (tmp instanceof Object[]) {
                        Object[] pdus = (Object[]) tmp;
                        smsMessage = SmsMessage.createFromPdu((byte[]) pdus[0]);
                    }
                }
            }

            if (smsMessage != null) {
                body = smsMessage.getDisplayMessageBody();
                if (body != null && smsMessage.getOriginatingAddress() != null) {
                    if (GPLog.LOG)
                        GPLog.addLogEntry(this, "Got message: " + body);
                    if (body.toLowerCase().matches(".*geopap.*")) {
                        isGeopapsms = true;
                    }
                    if (isGeopapsms) {
                        String msg = null;
                        String lastPosition = context.getString(R.string.last_position);
                        msg = SmsUtilities.createPositionText(context, lastPosition);
                        if (msg.length() > 160) {
                            // if longer than 160 chars it will not work, try using only url
                            msg = SmsUtilities.createPositionText(context, null);
                        }

                        if (GPLog.LOG)
                            GPLog.addLogEntry(this, msg);
                        String addr = smsMessage.getOriginatingAddress();
                        SmsUtilities.sendSMS(context, addr, msg, true);
                    }
                }
            }
        }
    }

}