/*
 * Copyright (C) 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 com.android.systemui.statusbar.notification.row;

import static android.app.NotificationManager.IMPORTANCE_DEFAULT;
import static android.app.NotificationManager.IMPORTANCE_LOW;
import static android.app.NotificationManager.IMPORTANCE_UNSPECIFIED;

import static com.android.systemui.Interpolators.FAST_OUT_SLOW_IN;

import static java.lang.annotation.RetentionPolicy.SOURCE;

import android.annotation.IntDef;
import android.annotation.Nullable;
import android.app.INotificationManager;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationChannelGroup;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.Drawable;
import android.metrics.LogMaker;
import android.os.Handler;
import android.os.RemoteException;
import android.service.notification.StatusBarNotification;
import android.text.TextUtils;
import android.transition.ChangeBounds;
import android.transition.Fade;
import android.transition.TransitionManager;
import android.transition.TransitionSet;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.logging.MetricsLogger;
import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
import com.android.systemui.Dependency;
import com.android.systemui.R;
import com.android.systemui.statusbar.notification.VisualStabilityManager;
import com.android.systemui.statusbar.notification.collection.NotificationEntry;

import java.lang.annotation.Retention;
import java.util.List;
import java.util.Set;

/**
 * The guts of a notification revealed when performing a long press.
 */
public class NotificationInfo extends LinearLayout implements NotificationGuts.GutsContent {
    private static final String TAG = "InfoGuts";
    private int mActualHeight;

    @IntDef(prefix = { "ACTION_" }, value = {
            ACTION_NONE,
            ACTION_TOGGLE_ALERT,
            ACTION_TOGGLE_SILENT,
    })
    public @interface NotificationInfoAction {
    }

    public static final int ACTION_NONE = 0;
    // standard controls
    static final int ACTION_TOGGLE_SILENT = 2;
    // standard controls
    private static final int ACTION_TOGGLE_ALERT = 5;

    private TextView mPriorityDescriptionView;
    private TextView mSilentDescriptionView;

    private INotificationManager mINotificationManager;
    private PackageManager mPm;
    private MetricsLogger mMetricsLogger;
    private VisualStabilityManager mVisualStabilityManager;
    private ChannelEditorDialogController mChannelEditorDialogController;

    private String mPackageName;
    private String mAppName;
    private int mAppUid;
    private String mDelegatePkg;
    private int mNumUniqueChannelsInRow;
    private Set<NotificationChannel> mUniqueChannelsInRow;
    private NotificationChannel mSingleNotificationChannel;
    private int mStartingChannelImportance;
    private boolean mWasShownHighPriority;
    private boolean mPressedApply;
    private boolean mPresentingChannelEditorDialog = false;

    /**
     * The last importance level chosen by the user.  Null if the user has not chosen an importance
     * level; non-null once the user takes an action which indicates an explicit preference.
     */
    @Nullable private Integer mChosenImportance;
    private boolean mIsSingleDefaultChannel;
    private boolean mIsNonblockable;
    private StatusBarNotification mSbn;
    private boolean mIsDeviceProvisioned;

    private OnSettingsClickListener mOnSettingsClickListener;
    private OnAppSettingsClickListener mAppSettingsClickListener;
    private NotificationGuts mGutsContainer;
    private Drawable mPkgIcon;

    @VisibleForTesting
    boolean mSkipPost = false;

    // used by standard ui
    private OnClickListener mOnAlert = v -> {
        mChosenImportance = IMPORTANCE_DEFAULT;
        applyAlertingBehavior(BEHAVIOR_ALERTING, true /* userTriggered */);
    };

    // used by standard ui
    private OnClickListener mOnSilent = v -> {
        mChosenImportance = IMPORTANCE_LOW;
        applyAlertingBehavior(BEHAVIOR_SILENT, true /* userTriggered */);
    };

    // used by standard ui
    private OnClickListener mOnDismissSettings = v -> {
        mPressedApply = true;
        mGutsContainer.closeControls(v, true);
    };

    public NotificationInfo(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();

        mPriorityDescriptionView = findViewById(R.id.alert_summary);
        mSilentDescriptionView = findViewById(R.id.silence_summary);
    }

    // Specify a CheckSaveListener to override when/if the user's changes are committed.
    public interface CheckSaveListener {
        // Invoked when importance has changed and the NotificationInfo wants to try to save it.
        // Listener should run saveImportance unless the change should be canceled.
        void checkSave(Runnable saveImportance, StatusBarNotification sbn);
    }

    public interface OnSettingsClickListener {
        void onClick(View v, NotificationChannel channel, int appUid);
    }

    public interface OnAppSettingsClickListener {
        void onClick(View v, Intent intent);
    }

    public void bindNotification(
            PackageManager pm,
            INotificationManager iNotificationManager,
            VisualStabilityManager visualStabilityManager,
            ChannelEditorDialogController channelEditorDialogController,
            String pkg,
            NotificationChannel notificationChannel,
            Set<NotificationChannel> uniqueChannelsInRow,
            NotificationEntry entry,
            OnSettingsClickListener onSettingsClick,
            OnAppSettingsClickListener onAppSettingsClick,
            boolean isDeviceProvisioned,
            boolean isNonblockable,
            boolean wasShownHighPriority)
            throws RemoteException {
        mINotificationManager = iNotificationManager;
        mMetricsLogger = Dependency.get(MetricsLogger.class);
        mVisualStabilityManager = visualStabilityManager;
        mChannelEditorDialogController = channelEditorDialogController;
        mPackageName = pkg;
        mUniqueChannelsInRow = uniqueChannelsInRow;
        mNumUniqueChannelsInRow = uniqueChannelsInRow.size();
        mSbn = entry.getSbn();
        mPm = pm;
        mAppSettingsClickListener = onAppSettingsClick;
        mAppName = mPackageName;
        mOnSettingsClickListener = onSettingsClick;
        mSingleNotificationChannel = notificationChannel;
        mStartingChannelImportance = mSingleNotificationChannel.getImportance();
        mWasShownHighPriority = wasShownHighPriority;
        mIsNonblockable = isNonblockable;
        mAppUid = mSbn.getUid();
        mDelegatePkg = mSbn.getOpPkg();
        mIsDeviceProvisioned = isDeviceProvisioned;

        int numTotalChannels = mINotificationManager.getNumNotificationChannelsForPackage(
                pkg, mAppUid, false /* includeDeleted */);
        if (mNumUniqueChannelsInRow == 0) {
            throw new IllegalArgumentException("bindNotification requires at least one channel");
        } else  {
            // Special behavior for the Default channel if no other channels have been defined.
            mIsSingleDefaultChannel = mNumUniqueChannelsInRow == 1
                    && mSingleNotificationChannel.getId().equals(
                            NotificationChannel.DEFAULT_CHANNEL_ID)
                    && numTotalChannels == 1;
        }

        bindHeader();
        bindChannelDetails();

        bindInlineControls();

        mMetricsLogger.write(notificationControlsLogMaker());
    }

    private void bindInlineControls() {
        if (mIsNonblockable) {
            findViewById(R.id.non_configurable_text).setVisibility(VISIBLE);
            findViewById(R.id.non_configurable_multichannel_text).setVisibility(GONE);
            findViewById(R.id.interruptiveness_settings).setVisibility(GONE);
            ((TextView) findViewById(R.id.done)).setText(R.string.inline_done_button);
            findViewById(R.id.turn_off_notifications).setVisibility(GONE);
        } else if (mNumUniqueChannelsInRow > 1) {
            findViewById(R.id.non_configurable_text).setVisibility(GONE);
            findViewById(R.id.interruptiveness_settings).setVisibility(GONE);
            findViewById(R.id.non_configurable_multichannel_text).setVisibility(VISIBLE);
        } else {
            findViewById(R.id.non_configurable_text).setVisibility(GONE);
            findViewById(R.id.non_configurable_multichannel_text).setVisibility(GONE);
            findViewById(R.id.interruptiveness_settings).setVisibility(VISIBLE);
        }

        View turnOffButton = findViewById(R.id.turn_off_notifications);
        turnOffButton.setOnClickListener(getTurnOffNotificationsClickListener());
        turnOffButton.setVisibility(turnOffButton.hasOnClickListeners() && !mIsNonblockable
                ? VISIBLE : GONE);

        View done = findViewById(R.id.done);
        done.setOnClickListener(mOnDismissSettings);
        done.setAccessibilityDelegate(mGutsContainer.getAccessibilityDelegate());

        View silent = findViewById(R.id.silence);
        View alert = findViewById(R.id.alert);
        silent.setOnClickListener(mOnSilent);
        alert.setOnClickListener(mOnAlert);

        int behavior = mWasShownHighPriority
                        ? BEHAVIOR_ALERTING
                        : BEHAVIOR_SILENT;
        applyAlertingBehavior(behavior, false /* userTriggered */);
    }

    private void bindHeader() {
        // Package name
        mPkgIcon = null;
        ApplicationInfo info;
        try {
            info = mPm.getApplicationInfo(
                    mPackageName,
                    PackageManager.MATCH_UNINSTALLED_PACKAGES
                            | PackageManager.MATCH_DISABLED_COMPONENTS
                            | PackageManager.MATCH_DIRECT_BOOT_UNAWARE
                            | PackageManager.MATCH_DIRECT_BOOT_AWARE);
            if (info != null) {
                mAppName = String.valueOf(mPm.getApplicationLabel(info));
                mPkgIcon = mPm.getApplicationIcon(info);
            }
        } catch (PackageManager.NameNotFoundException e) {
            // app is gone, just show package name and generic icon
            mPkgIcon = mPm.getDefaultActivityIcon();
        }
        ((ImageView) findViewById(R.id.pkg_icon)).setImageDrawable(mPkgIcon);
        ((TextView) findViewById(R.id.pkg_name)).setText(mAppName);

        // Delegate
        bindDelegate();

        // Set up app settings link (i.e. Customize)
        View settingsLinkView = findViewById(R.id.app_settings);
        Intent settingsIntent = getAppSettingsIntent(mPm, mPackageName,
                mSingleNotificationChannel,
                mSbn.getId(), mSbn.getTag());
        if (settingsIntent != null
                && !TextUtils.isEmpty(mSbn.getNotification().getSettingsText())) {
            settingsLinkView.setVisibility(VISIBLE);
            settingsLinkView.setOnClickListener((View view) -> {
                mAppSettingsClickListener.onClick(view, settingsIntent);
            });
        } else {
            settingsLinkView.setVisibility(View.GONE);
        }

        // System Settings button.
        final View settingsButton = findViewById(R.id.info);
        settingsButton.setOnClickListener(getSettingsOnClickListener());
        settingsButton.setVisibility(settingsButton.hasOnClickListeners() ? VISIBLE : GONE);
    }

    private OnClickListener getSettingsOnClickListener() {
        if (mAppUid >= 0 && mOnSettingsClickListener != null && mIsDeviceProvisioned) {
            final int appUidF = mAppUid;
            return ((View view) -> {
                mOnSettingsClickListener.onClick(view,
                        mNumUniqueChannelsInRow > 1 ? null : mSingleNotificationChannel,
                        appUidF);
            });
        }
        return null;
    }

    private OnClickListener getTurnOffNotificationsClickListener() {
        return ((View view) -> {
            if (!mPresentingChannelEditorDialog && mChannelEditorDialogController != null) {
                mPresentingChannelEditorDialog = true;

                mChannelEditorDialogController.prepareDialogForApp(mAppName, mPackageName, mAppUid,
                        mUniqueChannelsInRow, mPkgIcon, mOnSettingsClickListener);
                mChannelEditorDialogController.setOnFinishListener(() -> {
                    mPresentingChannelEditorDialog = false;
                    mGutsContainer.closeControls(this, false);
                });
                mChannelEditorDialogController.show();
            }
        });
    }

    private void bindChannelDetails() throws RemoteException {
        bindName();
        bindGroup();
    }

    private void bindName() {
        final TextView channelName = findViewById(R.id.channel_name);
        if (mIsSingleDefaultChannel || mNumUniqueChannelsInRow > 1) {
            channelName.setVisibility(View.GONE);
        } else {
            channelName.setText(mSingleNotificationChannel.getName());
        }
    }

    private void bindDelegate() {
        TextView delegateView = findViewById(R.id.delegate_name);

        CharSequence delegatePkg = null;
        if (!TextUtils.equals(mPackageName, mDelegatePkg)) {
            // this notification was posted by a delegate!
            delegateView.setVisibility(View.VISIBLE);
        } else {
            delegateView.setVisibility(View.GONE);
        }
    }

    private void bindGroup() throws RemoteException {
        // Set group information if this channel has an associated group.
        CharSequence groupName = null;
        if (mSingleNotificationChannel != null && mSingleNotificationChannel.getGroup() != null) {
            final NotificationChannelGroup notificationChannelGroup =
                    mINotificationManager.getNotificationChannelGroupForPackage(
                            mSingleNotificationChannel.getGroup(), mPackageName, mAppUid);
            if (notificationChannelGroup != null) {
                groupName = notificationChannelGroup.getName();
            }
        }
        TextView groupNameView = findViewById(R.id.group_name);
        if (groupName != null) {
            groupNameView.setText(groupName);
            groupNameView.setVisibility(VISIBLE);
        } else {
            groupNameView.setVisibility(GONE);
        }
    }

    private void saveImportance() {
        if (!mIsNonblockable) {
            if (mChosenImportance == null) {
                mChosenImportance = mStartingChannelImportance;
            }
            updateImportance();
        }
    }

    /**
     * Commits the updated importance values on the background thread.
     */
    private void updateImportance() {
        if (mChosenImportance != null) {
            mMetricsLogger.write(importanceChangeLogMaker());

            int newImportance = mChosenImportance;
            if (mStartingChannelImportance != IMPORTANCE_UNSPECIFIED) {
                if ((mWasShownHighPriority && mChosenImportance >= IMPORTANCE_DEFAULT)
                        || (!mWasShownHighPriority && mChosenImportance < IMPORTANCE_DEFAULT)) {
                    newImportance = mStartingChannelImportance;
                }
            }

            Handler bgHandler = new Handler(Dependency.get(Dependency.BG_LOOPER));
            bgHandler.post(
                    new UpdateImportanceRunnable(mINotificationManager, mPackageName, mAppUid,
                            mNumUniqueChannelsInRow == 1 ? mSingleNotificationChannel : null,
                            mStartingChannelImportance, newImportance));
            mVisualStabilityManager.temporarilyAllowReordering();
        }
    }

    @Override
    public boolean post(Runnable action) {
        if (mSkipPost) {
            action.run();
            return true;
        } else {
            return super.post(action);
        }
    }

    private void applyAlertingBehavior(@AlertingBehavior int behavior, boolean userTriggered) {
        if (userTriggered) {
            TransitionSet transition = new TransitionSet();
            transition.setOrdering(TransitionSet.ORDERING_TOGETHER);
            transition.addTransition(new Fade(Fade.OUT))
                    .addTransition(new ChangeBounds())
                    .addTransition(
                            new Fade(Fade.IN)
                                    .setStartDelay(150)
                                    .setDuration(200)
                                    .setInterpolator(FAST_OUT_SLOW_IN));
            transition.setDuration(350);
            transition.setInterpolator(FAST_OUT_SLOW_IN);
            TransitionManager.beginDelayedTransition(this, transition);
        }

        View alert = findViewById(R.id.alert);
        View silence = findViewById(R.id.silence);

        switch (behavior) {
            case BEHAVIOR_ALERTING:
                mPriorityDescriptionView.setVisibility(VISIBLE);
                mSilentDescriptionView.setVisibility(GONE);
                post(() -> {
                    alert.setSelected(true);
                    silence.setSelected(false);
                });
                break;

            case BEHAVIOR_SILENT:
                mSilentDescriptionView.setVisibility(VISIBLE);
                mPriorityDescriptionView.setVisibility(GONE);
                post(() -> {
                    alert.setSelected(false);
                    silence.setSelected(true);
                });
                break;

            default:
                throw new IllegalArgumentException("Unrecognized alerting behavior: " + behavior);
        }

        boolean isAChange = mWasShownHighPriority != (behavior == BEHAVIOR_ALERTING);
        TextView done = findViewById(R.id.done);
        done.setText(isAChange
                ? R.string.inline_ok_button
                : R.string.inline_done_button);
    }

    @Override
    public void onFinishedClosing() {
        if (mChosenImportance != null) {
            mStartingChannelImportance = mChosenImportance;
        }

        bindInlineControls();

        mMetricsLogger.write(notificationControlsLogMaker().setType(MetricsEvent.TYPE_CLOSE));
    }

    @Override
    public boolean needsFalsingProtection() {
        return true;
    }

    @Override
    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
        super.onInitializeAccessibilityEvent(event);
        if (mGutsContainer != null &&
                event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
            if (mGutsContainer.isExposed()) {
                event.getText().add(mContext.getString(
                        R.string.notification_channel_controls_opened_accessibility, mAppName));
            } else {
                event.getText().add(mContext.getString(
                        R.string.notification_channel_controls_closed_accessibility, mAppName));
            }
        }
    }

    private Intent getAppSettingsIntent(PackageManager pm, String packageName,
            NotificationChannel channel, int id, String tag) {
        Intent intent = new Intent(Intent.ACTION_MAIN)
                .addCategory(Notification.INTENT_CATEGORY_NOTIFICATION_PREFERENCES)
                .setPackage(packageName);
        final List<ResolveInfo> resolveInfos = pm.queryIntentActivities(
                intent,
                PackageManager.MATCH_DEFAULT_ONLY
        );
        if (resolveInfos == null || resolveInfos.size() == 0 || resolveInfos.get(0) == null) {
            return null;
        }
        final ActivityInfo activityInfo = resolveInfos.get(0).activityInfo;
        intent.setClassName(activityInfo.packageName, activityInfo.name);
        if (channel != null) {
            intent.putExtra(Notification.EXTRA_CHANNEL_ID, channel.getId());
        }
        intent.putExtra(Notification.EXTRA_NOTIFICATION_ID, id);
        intent.putExtra(Notification.EXTRA_NOTIFICATION_TAG, tag);
        return intent;
    }

    @Override
    public void setGutsParent(NotificationGuts guts) {
        mGutsContainer = guts;
    }

    @Override
    public boolean willBeRemoved() {
        return false;
    }

    @Override
    public boolean shouldBeSaved() {
        return mPressedApply;
    }

    @Override
    public View getContentView() {
        return this;
    }

    @Override
    public boolean handleCloseControls(boolean save, boolean force) {
        if (mPresentingChannelEditorDialog && mChannelEditorDialogController != null) {
            mPresentingChannelEditorDialog = false;
            // No need for the finish listener because we're closing
            mChannelEditorDialogController.setOnFinishListener(null);
            mChannelEditorDialogController.close();
        }

        // Save regardless of the importance so we can lock the importance field if the user wants
        // to keep getting notifications
        if (save) {
            saveImportance();
        }
        return false;
    }

    @Override
    public int getActualHeight() {
        // Because we're animating the bounds, getHeight will return the small height at the
        // beginning of the animation. Instead we'd want it to already return the end value
        return mActualHeight;
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        super.onLayout(changed, l, t, r, b);
        mActualHeight = getHeight();
    }

    @VisibleForTesting
    public boolean isAnimating() {
        return false;
    }

    /**
     * Runnable to either update the given channel (with a new importance value) or, if no channel
     * is provided, update notifications enabled state for the package.
     */
    private static class UpdateImportanceRunnable implements Runnable {
        private final INotificationManager mINotificationManager;
        private final String mPackageName;
        private final int mAppUid;
        private final @Nullable NotificationChannel mChannelToUpdate;
        private final int mCurrentImportance;
        private final int mNewImportance;


        public UpdateImportanceRunnable(INotificationManager notificationManager,
                String packageName, int appUid, @Nullable NotificationChannel channelToUpdate,
                int currentImportance, int newImportance) {
            mINotificationManager = notificationManager;
            mPackageName = packageName;
            mAppUid = appUid;
            mChannelToUpdate = channelToUpdate;
            mCurrentImportance = currentImportance;
            mNewImportance = newImportance;
        }

        @Override
        public void run() {
            try {
                if (mChannelToUpdate != null) {
                    mChannelToUpdate.setImportance(mNewImportance);
                    mChannelToUpdate.lockFields(NotificationChannel.USER_LOCKED_IMPORTANCE);
                    mINotificationManager.updateNotificationChannelForPackage(
                            mPackageName, mAppUid, mChannelToUpdate);
                } else {
                    // For notifications with more than one channel, update notification enabled
                    // state. If the importance was lowered, we disable notifications.
                    mINotificationManager.setNotificationsEnabledWithImportanceLockForPackage(
                            mPackageName, mAppUid, mNewImportance >= mCurrentImportance);
                }
            } catch (RemoteException e) {
                Log.e(TAG, "Unable to update notification importance", e);
            }
        }
    }

    /**
     * Returns a LogMaker with all available notification information.
     * Caller should set category, type, and maybe subtype, before passing it to mMetricsLogger.
     * @return LogMaker
     */
    private LogMaker getLogMaker() {
        // The constructor requires a category, so also do it in the other branch for consistency.
        return mSbn == null ? new LogMaker(MetricsEvent.NOTIFICATION_BLOCKING_HELPER)
                : mSbn.getLogMaker().setCategory(MetricsEvent.NOTIFICATION_BLOCKING_HELPER);
    }

    /**
     * Returns an initialized LogMaker for logging importance changes.
     * The caller may override the type before passing it to mMetricsLogger.
     * @return LogMaker
     */
    private LogMaker importanceChangeLogMaker() {
        Integer chosenImportance =
                mChosenImportance != null ? mChosenImportance : mStartingChannelImportance;
        return getLogMaker().setCategory(MetricsEvent.ACTION_SAVE_IMPORTANCE)
                .setType(MetricsEvent.TYPE_ACTION)
                .setSubtype(chosenImportance - mStartingChannelImportance);
    }

    /**
     * Returns an initialized LogMaker for logging open/close of the info display.
     * The caller may override the type before passing it to mMetricsLogger.
     * @return LogMaker
     */
    private LogMaker notificationControlsLogMaker() {
        return getLogMaker().setCategory(MetricsEvent.ACTION_NOTE_CONTROLS)
                .setType(MetricsEvent.TYPE_OPEN)
                .setSubtype(MetricsEvent.BLOCKING_HELPER_UNKNOWN);
    }

    @Retention(SOURCE)
    @IntDef({BEHAVIOR_ALERTING, BEHAVIOR_SILENT})
    private @interface AlertingBehavior {}
    private static final int BEHAVIOR_ALERTING = 0;
    private static final int BEHAVIOR_SILENT = 1;
}