/*
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html.
 *
 * This file is a derivative of code released under the terms listed below.
 *
 */
/*
*  Copyright (c) 2013,
*      Tobias Blaschke <code@tobiasblaschke.de>
*  All rights reserved.

*  Redistribution and use in source and binary forms, with or without
*  modification, are permitted provided that the following conditions are met:
*
*  1. Redistributions of source code must retain the above copyright notice,
*     this list of conditions and the following disclaimer.
*
*  2. Redistributions in binary form must reproduce the above copyright notice,
*     this list of conditions and the following disclaimer in the documentation
*     and/or other materials provided with the distribution.
*
*  3. The names of the contributors may not be used to endorse or promote
*     products derived from this software without specific prior written
*     permission.
*
*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
*  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
*  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
*  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
*  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
*  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
*  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
*  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
*  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
*  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
*  POSSIBILITY OF SUCH DAMAGE.
*/
package com.ibm.wala.dalvik.util;

import com.ibm.wala.classLoader.IClass;
import com.ibm.wala.classLoader.IMethod;
import com.ibm.wala.ipa.cha.IClassHierarchy;
import com.ibm.wala.types.ClassLoaderReference;
import com.ibm.wala.types.TypeName;
import com.ibm.wala.types.TypeReference;
import com.ibm.wala.util.strings.StringStuff;

/**
 * Android Components like Activity, Service, ...
 *
 * @author Tobias Blaschke &lt;code@tobiasblaschke.de&gt;
 * @since 2013-10-16
 */
public enum AndroidComponent {
  APPLICATION(AndroidTypes.Application, "Application"),
  ACTIVITY(AndroidTypes.Activity, "Activity"),
  FRAGMENT(AndroidTypes.Fragment, "Fragment"),
  SERVICE(AndroidTypes.Service, "Service"),
  INTENT_SERVICE(AndroidTypes.IntentService, "IntentService"),
  ABSTRACT_INPUT_METHOD_SERVICE(
      AndroidTypes.AbstractInputMethodService, "AbstractInputMethodService"),
  ACCESSIBILITY_SERVICE(AndroidTypes.AccessibilityService, "AccessibilityService"),
  DREAM_SERVICE(AndroidTypes.DreamService, "DreamService"),
  HOST_APDU_SERVICE(AndroidTypes.HostApduService, "HostApduService"),
  MEDIA_ROUTE_PROVIDER_SERVICE(AndroidTypes.MediaRouteProviderService, "MediaRouteProviderService"),
  NOTIFICATION_LISTENER_SERVICE(
      AndroidTypes.NotificationListenerService, "NotificationListenerService"),
  OFF_HOST_APDU_SERVICE(AndroidTypes.OffHostApduService, "OffHostApduService"),
  PRINT_SERVICE(AndroidTypes.PrintService, "PrintService"),
  RECOGNITION_SERVICE(AndroidTypes.RecognitionService, "RecognitionService"),
  REMOTE_VIEWS_SERVICE(AndroidTypes.RemoteViewsService, "RemoteViewsService"),
  SETTING_INJECTOR_SERVICE(AndroidTypes.SettingInjectorService, "SettingInjectorService"),
  SPELL_CHECKER_SERVICE(AndroidTypes.SpellCheckerService, "SpellCheckerService"),
  TEXT_TO_SPEECH_SERVICE(AndroidTypes.TextToSpeechService, "TextToSpeechService"),
  VPN_SERVICE(AndroidTypes.VpnService, "VpnService"),
  WALLPAPER_SERVICE(AndroidTypes.WallpaperService, "WallpaperService"),
  INPUT_METHOD_SERVICE(AndroidTypes.InputMethodService, "InputMethodService"),
  PROVIDER(AndroidTypes.ContentProvider, "ContentProvider"),
  BROADCAST_RECEIVER(AndroidTypes.BroadcastReceiver, "BroadcastReceiver"),
  // Additional CallBacks:
  LOADER_CB("Landroid/app/LoaderManager/LoaderCallbacks", "CallBackFromLoader"),
  RESOLVER(AndroidTypes.ContentResolver, "ContentResolver"),
  CONTEXT(AndroidTypes.Context, "Context"),
  HTTP("Landroid/net/AndroidHttpClient", "AndroidHttpClient"),
  BINDER(AndroidTypes.IBinder, "IBinder"),
  LOCATION_MGR("Landroid/location/LocationManager", "LocationManager"),
  TELEPHONY("Landroid/telephony/TelephonyManager", "TelephonyManager"),
  SMS("Landroid/telephony/SmsManager", "SmsManager"),
  SMS_GSM("Landroid/telephony/gsm/SmsManager", "GsmSmsManager"),
  LOCATION_LISTENER("Landroid/location/LocationListener", "LocationListener"),
  GPS_LISTENER("Landroid/location/GpsStatus$Listener", "GpsStatusListener"),
  GPS_NMEA_LISTENER("Landroid/location/GpsStatus$NmeaListener", "GpsNmeaListener"),
  UNKNOWN((String) null, "NULL");

  private TypeReference tRef;
  private final TypeName type;
  private final String prettyName;

  AndroidComponent(TypeReference type, final String prettyName) {
    this.tRef = type;
    this.type = type.getName();
    this.prettyName = prettyName;
  }

  AndroidComponent(final String type, final String prettyName) {
    if (prettyName.contains(".")
        || prettyName.contains("/")
        || prettyName.contains("$")
        || prettyName.contains(" ")
        || prettyName.contains("\t")) {
      throw new IllegalArgumentException(
          "The prettyName may not contain one of the reserved characters "
              + "., /, $ or whitespace. The given name was "
              + prettyName);
    }
    this.tRef = null;
    this.prettyName = prettyName;
    if (type != null) {
      this.type = TypeName.findOrCreate(type);
    } else {
      this.type = null;
    }
  }

  public static boolean isAndroidComponent(final TypeReference T, final IClassHierarchy cha) {
    for (final AndroidComponent candid : AndroidComponent.values()) {
      if (candid == AndroidComponent.UNKNOWN) continue;
      if (candid.getName().equals(T.getName())) {
        return true;
      }

      final IClass iT = cha.lookupClass(T);
      final IClass iCand = cha.lookupClass(candid.toReference());
      if (iT == null) {
        return false; // TODO
      }
      if (iCand == null) {
        return false; // ???!!!
      }
      if (cha.isAssignableFrom(iCand, iT)) {
        return true;
      }
    }
    return false;
  }

  /**
   * A name usable for display-output.
   *
   * <p>The name returned by this function may not necessarily as 'basename' for the class.
   */
  public String getPrettyName() {
    return this.prettyName;
  }

  /** The TypeName associated to the component. */
  public TypeName getName() {
    return this.type;
  }

  /** Generates a TypeReference for the component. */
  /* package private */ TypeReference toReference() {
    if (this.tRef != null) {
      return this.tRef;
    } else if (this.type == null) {
      return null;
    } else {
      this.tRef = TypeReference.find(ClassLoaderReference.Primordial, this.type);
      if (this.tRef == null) {
        /* { DEBUG
            System.out.println("AndroidComponent WARNING: TypeReference.find did not resolve " + this.type.toString());
        } // */
        this.tRef = TypeReference.findOrCreate(ClassLoaderReference.Primordial, this.type);
      }
      if (this.tRef == null) {
        throw new IllegalStateException(
            "Unable to resolve "
                + this.type.toString()
                + " in Primordial-Loader. "
                + "Perhaps the Android-Stubs used are the wrong ones: The analysis needs a view more functions, "
                + "than the Vanilla-Stubs offer. A script 'stubsBuilder.sh' should have been bundled to generate "
                + "these.");
      }
      return this.tRef;
    }
  }

  /**
   * Returns the Element the type matches exactly the given type.
   *
   * @return The Element if found or AndroidComponent.UNKNOWN if not
   */
  public static AndroidComponent explicit(final TypeName type) {
    for (AndroidComponent test : AndroidComponent.values()) {
      if (type.equals(test.type)) {
        return test;
      }
    }
    return UNKNOWN;
  }

  /**
   * Returns the Element the type matches exactly the given type.
   *
   * @return The Element if found or AndroidComponent.UNKNOWN if not
   */
  public static AndroidComponent explicit(final TypeReference type) {
    return explicit(type.getName());
  }

  /**
   * Returns the Element the type matches exactly the given type.
   *
   * @return The Element if found or AndroidComponent.UNKNOWN if not
   */
  public static AndroidComponent explicit(String type) {
    if (!(type.startsWith("L") || type.contains("/"))) {
      type = StringStuff.deployment2CanonicalTypeString(type);
    }
    return explicit(TypeName.findOrCreate(type));
  }

  /**
   * Return the Item that is a matching superclass.
   *
   * <p>For example returns AndroidComponent.ACTIVITY for 'LauncherActivity'
   *
   * @return the corresponding Enum-Element or AndroidComponent.UNKNOWN
   */
  public static AndroidComponent from(final IClass type, final IClassHierarchy cha) {
    for (AndroidComponent test : AndroidComponent.values()) {
      if ((type.getReference().equals(test.toReference()))
          || (cha.isSubclassOf(type, cha.lookupClass(test.toReference())))) {
        return test;
      }
    }
    return UNKNOWN;
  }

  /**
   * Returns the AndroidComponent the method is declared in.
   *
   * @return the corresponding Enum-Element or AndroidComponent.UNKNOWN
   */
  public static AndroidComponent from(final IMethod method, final IClassHierarchy cha) {
    if (method == null) return AndroidComponent.UNKNOWN;
    IClass type = method.getDeclaringClass();

    if (type == null) {
      throw new IllegalStateException("Unable to retreive the declaring class of " + method);
    }

    for (AndroidComponent test : AndroidComponent.values()) {
      if (test.equals(AndroidComponent.UNKNOWN)) continue;
      final TypeReference testRef = test.toReference();
      if (testRef == null) {
        continue; // Happens when the Android-Stubs are to old
      }
      final IClass testClass = cha.lookupClass(testRef);
      if (testClass == null) {
        continue; // Happens when the Android-Stubs are to old
      }

      if (testClass.isInterface()) {
        if (cha.isAssignableFrom(testClass, type)) {
          if (testClass.getMethod(method.getSelector()) != null) {
            return test;
          }
        }
      } else {
        if (cha.isSubclassOf(type, testClass)) {
          if (testClass.getMethod(method.getSelector()) != null) {
            return test;
          }
        }
      }
    }

    return UNKNOWN;
  }
}
