/*
 * Copyright (C) 2009 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.contacts.common;

import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.provider.ContactsContract.CommonDataKinds.Im;
import android.provider.ContactsContract.DisplayPhoto;
import android.support.annotation.IntDef;
import android.text.TextUtils;
import android.util.Pair;
import com.android.contacts.common.compat.ContactsCompat;
import com.android.contacts.common.compat.DirectoryCompat;
import com.android.contacts.common.model.AccountTypeManager;
import com.android.contacts.common.model.account.AccountWithDataSet;
import com.android.contacts.common.model.dataitem.ImDataItem;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.List;

public class ContactsUtils {

  // Telecomm related schemes are in CallUtil
  public static final String SCHEME_IMTO = "imto";
  public static final String SCHEME_MAILTO = "mailto";
  public static final String SCHEME_SMSTO = "smsto";
  public static final long USER_TYPE_CURRENT = 0;
  public static final long USER_TYPE_WORK = 1;
  private static final String TAG = "ContactsUtils";
  private static final int DEFAULT_THUMBNAIL_SIZE = 96;
  private static int sThumbnailSize = -1;

  /**
   * This looks up the provider name defined in ProviderNames from the predefined IM protocol id.
   * This is used for interacting with the IM application.
   *
   * @param protocol the protocol ID
   * @return the provider name the IM app uses for the given protocol, or null if no provider is
   *     defined for the given protocol
   * @hide
   */
  public static String lookupProviderNameFromId(int protocol) {
    switch (protocol) {
      case Im.PROTOCOL_GOOGLE_TALK:
        return ProviderNames.GTALK;
      case Im.PROTOCOL_AIM:
        return ProviderNames.AIM;
      case Im.PROTOCOL_MSN:
        return ProviderNames.MSN;
      case Im.PROTOCOL_YAHOO:
        return ProviderNames.YAHOO;
      case Im.PROTOCOL_ICQ:
        return ProviderNames.ICQ;
      case Im.PROTOCOL_JABBER:
        return ProviderNames.JABBER;
      case Im.PROTOCOL_SKYPE:
        return ProviderNames.SKYPE;
      case Im.PROTOCOL_QQ:
        return ProviderNames.QQ;
    }
    return null;
  }

  /**
   * Test if the given {@link CharSequence} contains any graphic characters, first checking {@link
   * TextUtils#isEmpty(CharSequence)} to handle null.
   */
  public static boolean isGraphic(CharSequence str) {
    return !TextUtils.isEmpty(str) && TextUtils.isGraphic(str);
  }

  /** Returns true if two objects are considered equal. Two null references are equal here. */
  public static boolean areObjectsEqual(Object a, Object b) {
    return a == b || (a != null && a.equals(b));
  }

  /** Returns true if two {@link Intent}s are both null, or have the same action. */
  public static final boolean areIntentActionEqual(Intent a, Intent b) {
    if (a == b) {
      return true;
    }
    if (a == null || b == null) {
      return false;
    }
    return TextUtils.equals(a.getAction(), b.getAction());
  }

  public static boolean areGroupWritableAccountsAvailable(Context context) {
    final List<AccountWithDataSet> accounts =
        AccountTypeManager.getInstance(context).getGroupWritableAccounts();
    return !accounts.isEmpty();
  }

  /**
   * Returns the size (width and height) of thumbnail pictures as configured in the provider. This
   * can safely be called from the UI thread, as the provider can serve this without performing a
   * database access
   */
  public static int getThumbnailSize(Context context) {
    if (sThumbnailSize == -1) {
      final Cursor c =
          context
              .getContentResolver()
              .query(
                  DisplayPhoto.CONTENT_MAX_DIMENSIONS_URI,
                  new String[] {DisplayPhoto.THUMBNAIL_MAX_DIM},
                  null,
                  null,
                  null);
      if (c != null) {
        try {
          if (c.moveToFirst()) {
            sThumbnailSize = c.getInt(0);
          }
        } finally {
          c.close();
        }
      }
    }
    return sThumbnailSize != -1 ? sThumbnailSize : DEFAULT_THUMBNAIL_SIZE;
  }

  private static Intent getCustomImIntent(ImDataItem im, int protocol) {
    String host = im.getCustomProtocol();
    final String data = im.getData();
    if (TextUtils.isEmpty(data)) {
      return null;
    }
    if (protocol != Im.PROTOCOL_CUSTOM) {
      // Try bringing in a well-known host for specific protocols
      host = ContactsUtils.lookupProviderNameFromId(protocol);
    }
    if (TextUtils.isEmpty(host)) {
      return null;
    }
    final String authority = host.toLowerCase();
    final Uri imUri =
        new Uri.Builder().scheme(SCHEME_IMTO).authority(authority).appendPath(data).build();
    final Intent intent = new Intent(Intent.ACTION_SENDTO, imUri);
    return intent;
  }

  /**
   * Returns the proper Intent for an ImDatItem. If available, a secondary intent is stored in the
   * second Pair slot
   */
  public static Pair<Intent, Intent> buildImIntent(Context context, ImDataItem im) {
    Intent intent = null;
    Intent secondaryIntent = null;
    final boolean isEmail = im.isCreatedFromEmail();

    if (!isEmail && !im.isProtocolValid()) {
      return new Pair<>(null, null);
    }

    final String data = im.getData();
    if (TextUtils.isEmpty(data)) {
      return new Pair<>(null, null);
    }

    final int protocol = isEmail ? Im.PROTOCOL_GOOGLE_TALK : im.getProtocol();

    if (protocol == Im.PROTOCOL_GOOGLE_TALK) {
      final int chatCapability = im.getChatCapability();
      if ((chatCapability & Im.CAPABILITY_HAS_CAMERA) != 0) {
        intent = new Intent(Intent.ACTION_SENDTO, Uri.parse("xmpp:" + data + "?message"));
        secondaryIntent = new Intent(Intent.ACTION_SENDTO, Uri.parse("xmpp:" + data + "?call"));
      } else if ((chatCapability & Im.CAPABILITY_HAS_VOICE) != 0) {
        // Allow Talking and Texting
        intent = new Intent(Intent.ACTION_SENDTO, Uri.parse("xmpp:" + data + "?message"));
        secondaryIntent = new Intent(Intent.ACTION_SENDTO, Uri.parse("xmpp:" + data + "?call"));
      } else {
        intent = new Intent(Intent.ACTION_SENDTO, Uri.parse("xmpp:" + data + "?message"));
      }
    } else {
      // Build an IM Intent
      intent = getCustomImIntent(im, protocol);
    }
    return new Pair<>(intent, secondaryIntent);
  }

  /**
   * Determine UserType from directory id and contact id.
   *
   * <p>3 types of query
   *
   * <p>1. 2 profile query: content://com.android.contacts/phone_lookup_enterprise/1234567890
   * personal and work contact are mixed into one cursor. no directory id. contact_id indicates if
   * it's work contact
   *
   * <p>2. work local query:
   * content://com.android.contacts/phone_lookup_enterprise/1234567890?directory=1000000000 either
   * directory_id or contact_id is enough to identify work contact
   *
   * <p>3. work remote query:
   * content://com.android.contacts/phone_lookup_enterprise/1234567890?directory=1000000003
   * contact_id is random. only directory_id is available
   *
   * <p>Summary: If directory_id is not null, always use directory_id to identify work contact.
   * (which is the case here) Otherwise, use contact_id.
   *
   * @param directoryId directory id of ContactsProvider query
   * @param contactId contact id
   * @return UserType indicates the user type of the contact. A directory id or contact id larger
   *     than a thredshold indicates that the contact is stored in Work Profile, but not in current
   *     user. It's a contract by ContactsProvider and check by Contacts.isEnterpriseDirectoryId and
   *     Contacts.isEnterpriseContactId. Currently, only 2 kinds of users can be detected from the
   *     directoryId and contactId as ContactsProvider can only access current and work user's
   *     contacts
   */
  public static @UserType long determineUserType(Long directoryId, Long contactId) {
    // First check directory id
    if (directoryId != null) {
      return DirectoryCompat.isEnterpriseDirectoryId(directoryId)
          ? USER_TYPE_WORK
          : USER_TYPE_CURRENT;
    }
    // Only check contact id if directory id is null
    if (contactId != null && contactId != 0L && ContactsCompat.isEnterpriseContactId(contactId)) {
      return USER_TYPE_WORK;
    } else {
      return USER_TYPE_CURRENT;
    }
  }

  // TODO find a proper place for the canonical version of these
  public interface ProviderNames {

    String YAHOO = "Yahoo";
    String GTALK = "GTalk";
    String MSN = "MSN";
    String ICQ = "ICQ";
    String AIM = "AIM";
    String XMPP = "XMPP";
    String JABBER = "JABBER";
    String SKYPE = "SKYPE";
    String QQ = "QQ";
  }

  /**
   * UserType indicates the user type of the contact. If the contact is from Work User (Work Profile
   * in Android Multi-User System), it's {@link #USER_TYPE_WORK}, otherwise, {@link
   * #USER_TYPE_CURRENT}. Please note that current user can be in work profile, where the dialer is
   * running inside Work Profile.
   */
  @Retention(RetentionPolicy.SOURCE)
  @IntDef({USER_TYPE_CURRENT, USER_TYPE_WORK})
  public @interface UserType {}
}