/*
 * Copyright 2017 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 android.app.servertransaction;

import static android.os.Trace.TRACE_TAG_ACTIVITY_MANAGER;

import static com.android.internal.annotations.VisibleForTesting.Visibility.PACKAGE;

import static java.util.Objects.requireNonNull;

import android.annotation.NonNull;
import android.annotation.Nullable;
import android.app.ActivityClient;
import android.app.ActivityManager.ProcessState;
import android.app.ActivityOptions.SceneTransitionInfo;
import android.app.ActivityThread.ActivityClientRecord;
import android.app.ClientTransactionHandler;
import android.app.IActivityClientController;
import android.app.ProfilerInfo;
import android.app.ResultInfo;
import android.compat.annotation.UnsupportedAppUsage;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.res.CompatibilityInfo;
import android.content.res.Configuration;
import android.os.BaseBundle;
import android.os.Bundle;
import android.os.IBinder;
import android.os.Parcel;
import android.os.PersistableBundle;
import android.os.Trace;
import android.window.ActivityWindowInfo;

import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.app.IVoiceInteractor;
import com.android.internal.content.ReferrerIntent;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

/**
 * Request to launch an activity.
 *
 * @hide
 */
public class LaunchActivityItem extends ClientTransactionItem {

    @NonNull
    private final IBinder mActivityToken;

    // TODO(b/170729553): Mark this with @NonNull and final once @UnsupportedAppUsage removed.
    //  We cannot do it now to avoid app compatibility regression.
    @UnsupportedAppUsage
    private Intent mIntent;

    // TODO(b/170729553): Mark this with @NonNull and final once @UnsupportedAppUsage removed.
    //  We cannot do it now to avoid app compatibility regression.
    @UnsupportedAppUsage
    private ActivityInfo mInfo;

    @NonNull
    private final Configuration mCurConfig;

    @NonNull
    private final Configuration mOverrideConfig;

    @Nullable
    private final String mReferrer;

    @Nullable
    private final IVoiceInteractor mVoiceInteractor;

    @Nullable
    private final Bundle mState;

    @Nullable
    private final PersistableBundle mPersistentState;

    @Nullable
    private final List<ResultInfo> mPendingResults;

    @Nullable
    private final List<ReferrerIntent> mPendingNewIntents;

    @Nullable
    private final SceneTransitionInfo mSceneTransitionInfo;

    @Nullable
    private final ProfilerInfo mProfilerInfo;

    @NonNull
    private final IBinder mAssistToken;

    @NonNull
    private final IBinder mShareableActivityToken;

    @Nullable
    private final IBinder mTaskFragmentToken;

    @NonNull
    private final IBinder mInitialCallerInfoAccessToken;

    @NonNull
    private final ActivityWindowInfo mActivityWindowInfo;

    /**
     * It is only non-null if the process is the first time to launch activity. It is only an
     * optimization for quick look up of the interface so the field is ignored for comparison.
     */
    @Nullable
    private final IActivityClientController mActivityClientController;

    private final int mIdent;
    private final int mDeviceId;
    private final int mProcState;
    private final boolean mIsForward;
    private final boolean mLaunchedFromBubble;
    private final int mDisplayId;

    public LaunchActivityItem(@NonNull IBinder activityToken, @NonNull Intent intent,
            int ident, @NonNull ActivityInfo info, @NonNull Configuration curConfig,
            @NonNull Configuration overrideConfig, int deviceId, @Nullable String referrer,
            @Nullable IVoiceInteractor voiceInteractor, @ProcessState int procState,
            @Nullable Bundle state, @Nullable PersistableBundle persistentState,
            @Nullable List<ResultInfo> pendingResults,
            @Nullable List<ReferrerIntent> pendingNewIntents,
            @Nullable SceneTransitionInfo sceneTransitionInfo,
            boolean isForward, @Nullable ProfilerInfo profilerInfo, @NonNull IBinder assistToken,
            @Nullable IActivityClientController activityClientController,
            @NonNull IBinder shareableActivityToken, boolean launchedFromBubble,
            @Nullable IBinder taskFragmentToken, @NonNull IBinder initialCallerInfoAccessToken,
            @NonNull ActivityWindowInfo activityWindowInfo, int displayId) {
        this(activityToken, ident, new Configuration(curConfig), new Configuration(overrideConfig),
                deviceId, referrer, voiceInteractor, procState,
                state != null ? new Bundle(state) : null,
                persistentState != null ? new PersistableBundle(persistentState) : null,
                pendingResults != null ? new ArrayList<>(pendingResults) : null,
                pendingNewIntents != null ? new ArrayList<>(pendingNewIntents) : null,
                sceneTransitionInfo, isForward,
                profilerInfo != null ? new ProfilerInfo(profilerInfo) : null,
                assistToken, activityClientController, shareableActivityToken, launchedFromBubble,
                taskFragmentToken, initialCallerInfoAccessToken,
                new ActivityWindowInfo(activityWindowInfo), displayId);
        mIntent = new Intent(intent);
        mInfo = new ActivityInfo(info);
    }

    // TODO(b/170729553): Merge this constructor with previous one if no @UnsupportedAppUsage filed.
    //  We cannot do it now to avoid app compatibility regression.
    private LaunchActivityItem(@NonNull IBinder activityToken, int ident,
            @NonNull Configuration curConfig,
            @NonNull Configuration overrideConfig, int deviceId, @Nullable String referrer,
            @Nullable IVoiceInteractor voiceInteractor, @ProcessState int procState,
            @Nullable Bundle state, @Nullable PersistableBundle persistentState,
            @Nullable List<ResultInfo> pendingResults,
            @Nullable List<ReferrerIntent> pendingNewIntents,
            @Nullable SceneTransitionInfo sceneTransitionInfo,
            boolean isForward, @Nullable ProfilerInfo profilerInfo, @NonNull IBinder assistToken,
            @Nullable IActivityClientController activityClientController,
            @NonNull IBinder shareableActivityToken, boolean launchedFromBubble,
            @Nullable IBinder taskFragmentToken, @NonNull IBinder initialCallerInfoAccessToken,
            @NonNull ActivityWindowInfo activityWindowInfo, int displayId) {
        mActivityToken = activityToken;
        mIdent = ident;
        mCurConfig = curConfig;
        mOverrideConfig = overrideConfig;
        mDeviceId = deviceId;
        mReferrer = referrer;
        mVoiceInteractor = voiceInteractor;
        mProcState = procState;
        mState = state;
        mPersistentState = persistentState;
        mPendingResults = pendingResults;
        mPendingNewIntents = pendingNewIntents;
        mSceneTransitionInfo = sceneTransitionInfo;
        mIsForward = isForward;
        mProfilerInfo = profilerInfo;
        mAssistToken = assistToken;
        mActivityClientController = activityClientController;
        mShareableActivityToken = shareableActivityToken;
        mLaunchedFromBubble = launchedFromBubble;
        mTaskFragmentToken = taskFragmentToken;
        mInitialCallerInfoAccessToken = initialCallerInfoAccessToken;
        mActivityWindowInfo = activityWindowInfo;
        mDisplayId = displayId;
    }

    @Override
    public void preExecute(@NonNull ClientTransactionHandler client) {
        client.countLaunchingActivities(1);
        client.updateProcessState(mProcState, false);
        CompatibilityInfo.applyOverrideIfNeeded(mCurConfig, mDisplayId);
        CompatibilityInfo.applyOverrideIfNeeded(mOverrideConfig, mDisplayId);
        client.updatePendingConfiguration(mCurConfig);
        if (mActivityClientController != null) {
            ActivityClient.setActivityClientController(mActivityClientController);
        }
    }

    @Override
    public void execute(@NonNull ClientTransactionHandler client,
            @NonNull PendingTransactionActions pendingActions) {
        Trace.traceBegin(TRACE_TAG_ACTIVITY_MANAGER, "activityStart");
        final ActivityClientRecord r = new ActivityClientRecord(mActivityToken, mIntent, mIdent,
                mInfo, mOverrideConfig, mReferrer, mVoiceInteractor, mState, mPersistentState,
                mPendingResults, mPendingNewIntents, mSceneTransitionInfo, mIsForward,
                mProfilerInfo, client, mAssistToken, mShareableActivityToken, mLaunchedFromBubble,
                mTaskFragmentToken, mInitialCallerInfoAccessToken, mActivityWindowInfo);
        client.handleLaunchActivity(r, pendingActions, mDeviceId, null /* customIntent */);
        Trace.traceEnd(TRACE_TAG_ACTIVITY_MANAGER);
    }

    @Override
    public void postExecute(@NonNull ClientTransactionHandler client,
            @NonNull PendingTransactionActions pendingActions) {
        client.countLaunchingActivities(-1);
    }

    @VisibleForTesting(visibility = PACKAGE)
    @NonNull
    @Override
    public IBinder getActivityToken() {
        return mActivityToken;
    }

    // Parcelable implementation

    /** Writes to Parcel. */
    @Override
    public void writeToParcel(@NonNull Parcel dest, int flags) {
        dest.writeStrongBinder(mActivityToken);
        dest.writeInt(mIdent);
        dest.writeTypedObject(mCurConfig, flags);
        dest.writeTypedObject(mOverrideConfig, flags);
        dest.writeInt(mDeviceId);
        dest.writeString(mReferrer);
        dest.writeStrongInterface(mVoiceInteractor);
        dest.writeInt(mProcState);
        dest.writeBundle(mState);
        dest.writePersistableBundle(mPersistentState);
        dest.writeTypedList(mPendingResults, flags);
        dest.writeTypedList(mPendingNewIntents, flags);
        dest.writeTypedObject(mSceneTransitionInfo, flags);
        dest.writeBoolean(mIsForward);
        dest.writeTypedObject(mProfilerInfo, flags);
        dest.writeStrongBinder(mAssistToken);
        dest.writeStrongInterface(mActivityClientController);
        dest.writeStrongBinder(mShareableActivityToken);
        dest.writeBoolean(mLaunchedFromBubble);
        dest.writeStrongBinder(mTaskFragmentToken);
        dest.writeStrongBinder(mInitialCallerInfoAccessToken);
        dest.writeTypedObject(mActivityWindowInfo, flags);
        dest.writeInt(mDisplayId);

        dest.writeTypedObject(mIntent, flags);
        dest.writeTypedObject(mInfo, flags);
    }

    /** Reads from Parcel. */
    private LaunchActivityItem(@NonNull Parcel in) {
        this(in.readStrongBinder() /* activityToken */,
                in.readInt() /* ident */,
                requireNonNull(in.readTypedObject(Configuration.CREATOR)) /* curConfig */,
                requireNonNull(in.readTypedObject(Configuration.CREATOR)) /* overrideConfig */,
                in.readInt() /* deviceId */,
                in.readString() /* referrer */,
                IVoiceInteractor.Stub.asInterface(in.readStrongBinder()) /* voiceInteractor */,
                in.readInt() /* procState */,
                in.readBundle(in.getClass().getClassLoader()) /* state */,
                in.readPersistableBundle(in.getClass().getClassLoader()) /* persistentState */,
                in.createTypedArrayList(ResultInfo.CREATOR) /* pendingResults */,
                in.createTypedArrayList(ReferrerIntent.CREATOR) /* pendingNewIntents */,
                in.readTypedObject(SceneTransitionInfo.CREATOR) /* sceneTransitionInfo */,
                in.readBoolean() /* isForward */,
                in.readTypedObject(ProfilerInfo.CREATOR) /* profilerInfo */,
                in.readStrongBinder() /* assistToken */,
                IActivityClientController.Stub.asInterface(
                        in.readStrongBinder()) /* activityClientController */,
                in.readStrongBinder() /* shareableActivityToken */,
                in.readBoolean() /* launchedFromBubble */,
                in.readStrongBinder() /* taskFragmentToken */,
                in.readStrongBinder() /* initialCallerInfoAccessToken */,
                requireNonNull(in.readTypedObject(ActivityWindowInfo.CREATOR))
                /* activityWindowInfo */,
                in.readInt() /* displayId */
        );
        mIntent = in.readTypedObject(Intent.CREATOR);
        mInfo = in.readTypedObject(ActivityInfo.CREATOR);
    }

    public static final @NonNull Creator<LaunchActivityItem> CREATOR = new Creator<>() {
        public LaunchActivityItem createFromParcel(@NonNull Parcel in) {
            return new LaunchActivityItem(in);
        }

        public LaunchActivityItem[] newArray(int size) {
            return new LaunchActivityItem[size];
        }
    };

    @Override
    public boolean equals(@Nullable Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        final LaunchActivityItem other = (LaunchActivityItem) o;
        final boolean intentsEqual = (mIntent == null && other.mIntent == null)
                || (mIntent != null && mIntent.filterEquals(other.mIntent));
        return intentsEqual
                && Objects.equals(mActivityToken, other.mActivityToken) && mIdent == other.mIdent
                && activityInfoEqual(other.mInfo) && Objects.equals(mCurConfig, other.mCurConfig)
                && Objects.equals(mOverrideConfig, other.mOverrideConfig)
                && mDeviceId == other.mDeviceId
                && Objects.equals(mReferrer, other.mReferrer)
                && mProcState == other.mProcState && areBundlesEqualRoughly(mState, other.mState)
                && areBundlesEqualRoughly(mPersistentState, other.mPersistentState)
                && Objects.equals(mPendingResults, other.mPendingResults)
                && Objects.equals(mPendingNewIntents, other.mPendingNewIntents)
                && (mSceneTransitionInfo == null) == (other.mSceneTransitionInfo == null)
                && mIsForward == other.mIsForward
                && Objects.equals(mProfilerInfo, other.mProfilerInfo)
                && Objects.equals(mAssistToken, other.mAssistToken)
                && Objects.equals(mShareableActivityToken, other.mShareableActivityToken)
                && Objects.equals(mTaskFragmentToken, other.mTaskFragmentToken)
                && Objects.equals(mInitialCallerInfoAccessToken,
                        other.mInitialCallerInfoAccessToken)
                && Objects.equals(mActivityWindowInfo, other.mActivityWindowInfo)
                && mDisplayId == other.mDisplayId;
    }

    @Override
    public int hashCode() {
        int result = 17;
        result = 31 * result + Objects.hashCode(mActivityToken);
        result = 31 * result + mIntent.filterHashCode();
        result = 31 * result + mIdent;
        result = 31 * result + Objects.hashCode(mCurConfig);
        result = 31 * result + Objects.hashCode(mOverrideConfig);
        result = 31 * result + mDeviceId;
        result = 31 * result + Objects.hashCode(mReferrer);
        result = 31 * result + Objects.hashCode(mProcState);
        result = 31 * result + getRoughBundleHashCode(mState);
        result = 31 * result + getRoughBundleHashCode(mPersistentState);
        result = 31 * result + Objects.hashCode(mPendingResults);
        result = 31 * result + Objects.hashCode(mPendingNewIntents);
        result = 31 * result + (mSceneTransitionInfo != null ? 1 : 0);
        result = 31 * result + (mIsForward ? 1 : 0);
        result = 31 * result + Objects.hashCode(mProfilerInfo);
        result = 31 * result + Objects.hashCode(mAssistToken);
        result = 31 * result + Objects.hashCode(mShareableActivityToken);
        result = 31 * result + Objects.hashCode(mTaskFragmentToken);
        result = 31 * result + Objects.hashCode(mInitialCallerInfoAccessToken);
        result = 31 * result + Objects.hashCode(mActivityWindowInfo);
        result = 31 * result + mDisplayId;
        return result;
    }

    private boolean activityInfoEqual(@Nullable ActivityInfo other) {
        if (mInfo == null) {
            return other == null;
        }
        return other != null && mInfo.flags == other.flags
                && mInfo.getMaxAspectRatio() == other.getMaxAspectRatio()
                && Objects.equals(mInfo.launchToken, other.launchToken)
                && Objects.equals(mInfo.getComponentName(), other.getComponentName());
    }

    /**
     * This method may be used to compare a parceled item with another unparceled item, and the
     * parceled bundle may contain customized class that will raise BadParcelableException when
     * unparceling if a customized class loader is not set to the bundle. So the hash code is
     * simply determined by the bundle is empty or not.
     */
    private static int getRoughBundleHashCode(@Nullable BaseBundle bundle) {
        return (bundle == null || bundle.isDefinitelyEmpty()) ? 0 : 1;
    }

    /** Compares the bundles without unparceling them (avoid BadParcelableException). */
    private static boolean areBundlesEqualRoughly(@Nullable BaseBundle a, @Nullable BaseBundle b) {
        return getRoughBundleHashCode(a) == getRoughBundleHashCode(b);
    }

    @Override
    public String toString() {
        return "LaunchActivityItem{activityToken=" + mActivityToken
                + ",intent=" + mIntent
                + ",ident=" + mIdent
                + ",info=" + mInfo
                + ",curConfig=" + mCurConfig
                + ",overrideConfig=" + mOverrideConfig
                + ",deviceId=" + mDeviceId
                + ",referrer=" + mReferrer
                + ",procState=" + mProcState
                + ",state=" + mState
                + ",persistentState=" + mPersistentState
                + ",pendingResults=" + mPendingResults
                + ",pendingNewIntents=" + mPendingNewIntents
                + ",sceneTransitionInfo=" + mSceneTransitionInfo
                + ",profilerInfo=" + mProfilerInfo
                + ",assistToken=" + mAssistToken
                + ",shareableActivityToken=" + mShareableActivityToken
                + ",activityWindowInfo=" + mActivityWindowInfo
                + ",displayId=" + mDisplayId
                + "}";
    }
}