/*
 * Copyright (C) 2007 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.internal.app;

import static android.view.WindowManager.LayoutParams.SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.LocationManagerInternal;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

import com.android.internal.R;
import com.android.internal.location.GpsNetInitiatedHandler;
import com.android.server.LocalServices;

/**
 * This activity is shown to the user for them to accept or deny network-initiated
 * requests. It uses the alert dialog style. It will be launched from a notification.
 */
public class NetInitiatedActivity extends AlertActivity implements DialogInterface.OnClickListener {

    private static final String TAG = "NetInitiatedActivity";

    private static final boolean DEBUG = false;

    private static final int POSITIVE_BUTTON = AlertDialog.BUTTON_POSITIVE;
    private static final int NEGATIVE_BUTTON = AlertDialog.BUTTON_NEGATIVE;

    private static final int GPS_NO_RESPONSE_TIME_OUT = 1;
    // Received ID from intent, -1 when no notification is in progress
    private int notificationId = -1;
    private int timeout = -1;
    private int default_response = -1;
    private int default_response_timeout = 6;

    private final Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case GPS_NO_RESPONSE_TIME_OUT: {
                    if (notificationId != -1) {
                        sendUserResponse(default_response);
                    }
                    finish();
                }
                break;
                default:
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        getWindow().addSystemFlags(SYSTEM_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);

        // Set up the "dialog"
        final Intent intent = getIntent();
        final AlertController.AlertParams p = mAlertParams;
        Context context = getApplicationContext();
        p.mTitle = intent.getStringExtra(GpsNetInitiatedHandler.NI_INTENT_KEY_TITLE);
        p.mMessage = intent.getStringExtra(GpsNetInitiatedHandler.NI_INTENT_KEY_MESSAGE);
        p.mPositiveButtonText = String.format(context.getString(R.string.gpsVerifYes));
        p.mPositiveButtonListener = this;
        p.mNegativeButtonText = String.format(context.getString(R.string.gpsVerifNo));
        p.mNegativeButtonListener = this;

        notificationId = intent.getIntExtra(GpsNetInitiatedHandler.NI_INTENT_KEY_NOTIF_ID, -1);
        timeout = intent.getIntExtra(GpsNetInitiatedHandler.NI_INTENT_KEY_TIMEOUT, default_response_timeout);
        default_response = intent.getIntExtra(GpsNetInitiatedHandler.NI_INTENT_KEY_DEFAULT_RESPONSE, GpsNetInitiatedHandler.GPS_NI_RESPONSE_ACCEPT);
        if (DEBUG) Log.d(TAG, "onCreate() : notificationId: " + notificationId + " timeout: " + timeout + " default_response:" + default_response);

        mHandler.sendMessageDelayed(mHandler.obtainMessage(GPS_NO_RESPONSE_TIME_OUT), (timeout * 1000));
        setupAlert();
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (DEBUG) Log.d(TAG, "onResume");
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (DEBUG) Log.d(TAG, "onPause");
    }

    /**
     * {@inheritDoc}
     */
    public void onClick(DialogInterface dialog, int which) {
        if (which == POSITIVE_BUTTON) {
            sendUserResponse(GpsNetInitiatedHandler.GPS_NI_RESPONSE_ACCEPT);
        }
        if (which == NEGATIVE_BUTTON) {
            sendUserResponse(GpsNetInitiatedHandler.GPS_NI_RESPONSE_DENY);
        }

        // No matter what, finish the activity
        finish();
        notificationId = -1;
    }

    // Respond to NI Handler under GnssLocationProvider, 1 = accept, 2 = deny
    private void sendUserResponse(int response) {
        if (DEBUG) Log.d(TAG, "sendUserResponse, response: " + response);
        LocationManagerInternal lm = LocalServices.getService(LocationManagerInternal.class);
        lm.sendNiResponse(notificationId, response);
    }
}