/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * 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.dialer.interactions;

import static android.Manifest.permission.READ_CONTACTS;
import static android.Manifest.permission.WRITE_CONTACTS;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.provider.ContactsContract.PhoneLookup;
import android.provider.ContactsContract.PinnedPositions;
import android.text.TextUtils;
import com.android.dialer.util.PermissionsUtil;

/**
 * This broadcast receiver is used to listen to outgoing calls and undemote formerly demoted
 * contacts if a phone call is made to a phone number belonging to that contact.
 *
 * <p>NOTE This doesn't work for corp contacts.
 */
public class UndemoteOutgoingCallReceiver extends BroadcastReceiver {

  private static final long NO_CONTACT_FOUND = -1;

  @Override
  public void onReceive(final Context context, Intent intent) {
    if (!PermissionsUtil.hasPermission(context, READ_CONTACTS)
        || !PermissionsUtil.hasPermission(context, WRITE_CONTACTS)) {
      return;
    }
    if (intent != null && Intent.ACTION_NEW_OUTGOING_CALL.equals(intent.getAction())) {
      final String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
      if (TextUtils.isEmpty(number)) {
        return;
      }
      new Thread() {
        @Override
        public void run() {
          final long id = getContactIdFromPhoneNumber(context, number);
          if (id != NO_CONTACT_FOUND) {
            undemoteContactWithId(context, id);
          }
        }
      }.start();
    }
  }

  private void undemoteContactWithId(Context context, long id) {
    // If the contact is not demoted, this will not do anything. Otherwise, it will
    // restore it to an unpinned position. If it was a frequently called contact, it will
    // show up once again show up on the favorites screen.
    if (PermissionsUtil.hasPermission(context, WRITE_CONTACTS)) {
      try {
        PinnedPositions.undemote(context.getContentResolver(), id);
      } catch (SecurityException e) {
        // Just in case
      }
    }
  }

  private long getContactIdFromPhoneNumber(Context context, String number) {
    if (!PermissionsUtil.hasPermission(context, READ_CONTACTS)) {
      return NO_CONTACT_FOUND;
    }
    final Uri contactUri = Uri.withAppendedPath(PhoneLookup.CONTENT_FILTER_URI, Uri.encode(number));
    final Cursor cursor;
    try {
      cursor =
          context
              .getContentResolver()
              .query(contactUri, new String[] {PhoneLookup._ID}, null, null, null);
    } catch (SecurityException e) {
      // Just in case
      return NO_CONTACT_FOUND;
    }
    if (cursor == null) {
      return NO_CONTACT_FOUND;
    }
    try {
      if (cursor.moveToFirst()) {
        final long id = cursor.getLong(0);
        return id;
      } else {
        return NO_CONTACT_FOUND;
      }
    } finally {
      cursor.close();
    }
  }
}