/*
 * Copyright (C) 2014 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.settings.notification;

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceCategory;
import android.util.ArrayMap;
import android.util.Log;

import com.android.internal.logging.MetricsProto.MetricsEvent;
import com.android.settings.AppHeader;
import com.android.settings.R;
import com.android.settings.Utils;
import com.android.settings.applications.AppHeaderController;
import com.android.settings.applications.AppInfoBase;
import com.android.settings.dashboard.DashboardFeatureProvider;
import com.android.settings.notification.NotificationBackend.AppRow;
import com.android.settings.overlay.FeatureFactory;
import com.android.settingslib.RestrictedPreference;
import com.android.settingslib.RestrictedSwitchPreference;

import java.util.List;

/** These settings are per app, so should not be returned in global search results. */
public class AppNotificationSettings extends NotificationSettingsBase {
    private static final String TAG = "AppNotificationSettings";
    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);

    private static final Intent APP_NOTIFICATION_PREFS_CATEGORY_INTENT
            = new Intent(Intent.ACTION_MAIN)
                .addCategory(Notification.INTENT_CATEGORY_NOTIFICATION_PREFERENCES);

    private static final String KEY_CHANNELS = "channels";

    private DashboardFeatureProvider mDashboardFeatureProvider;
    private PreferenceCategory mChannels;
    private List<NotificationChannel> mChannelList;


    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        if (mAppRow == null) return;
        if (!mDashboardFeatureProvider.isEnabled()) {
            AppHeader.createAppHeader(this, mAppRow.icon, mAppRow.label, mAppRow.pkg, mAppRow.uid,
                    mAppRow.settingsIntent);
        }
    }

    @Override
    public int getMetricsCategory() {
        return MetricsEvent.NOTIFICATION_APP_NOTIFICATION;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final Activity activity = getActivity();
        mDashboardFeatureProvider =
                FeatureFactory.getFactory(activity).getDashboardFeatureProvider(activity);

        addPreferencesFromResource(R.xml.app_notification_settings);

        mImportance = (ImportanceSeekBarPreference) findPreference(KEY_IMPORTANCE);
        mPriority =
                (RestrictedSwitchPreference) getPreferenceScreen().findPreference(KEY_BYPASS_DND);
        mVisibilityOverride =
                (RestrictedDropDownPreference) getPreferenceScreen().findPreference(
                        KEY_VISIBILITY_OVERRIDE);
        mBlock = (RestrictedSwitchPreference) getPreferenceScreen().findPreference(KEY_BLOCK);
        mSilent = (RestrictedSwitchPreference) getPreferenceScreen().findPreference(KEY_SILENT);
        mChannels = (PreferenceCategory) findPreference(KEY_CHANNELS);

        if (mPkgInfo != null) {
            // load settings intent
            ArrayMap<String, AppRow> rows = new ArrayMap<String, AppRow>();
            rows.put(mAppRow.pkg, mAppRow);
            collectConfigActivities(rows);
            mChannelList = mBackend.getChannels(mPkg, mUid).getList();

            setupImportancePrefs(mAppRow.systemApp, mAppRow.appImportance, mAppRow.banned,
                    NotificationManager.IMPORTANCE_HIGH);
            setupPriorityPref(mAppRow.appBypassDnd);
            setupVisOverridePref(mAppRow.appVisOverride);

            if (mChannelList.isEmpty()) {
                setVisible(mChannels, false);
            } else {
                int N = mChannelList.size();
                for (int i = 0; i < N; i++) {
                    final NotificationChannel channel = mChannelList.get(i);
                    RestrictedPreference channelPref = new RestrictedPreference(getPrefContext());
                    channelPref.setDisabledByAdmin(mSuspendedAppsAdmin);
                    channelPref.setKey(channel.getId());
                    channelPref.setTitle(channel.getName());
                    Bundle channelArgs = new Bundle();
                    channelArgs.putInt(AppInfoBase.ARG_PACKAGE_UID, mUid);
                    channelArgs.putBoolean(AppHeader.EXTRA_HIDE_INFO_BUTTON, true);
                    channelArgs.putString(AppInfoBase.ARG_PACKAGE_NAME, mPkg);
                    channelArgs.putString(ARG_CHANNEL, channel.getId());

                    Intent topicIntent = Utils.onBuildStartFragmentIntent(getActivity(),
                            ChannelNotificationSettings.class.getName(),
                            channelArgs, null, 0, null, false);
                    channelPref.setIntent(topicIntent);
                    mChannels.addPreference(channelPref);
                }
            }
            updateDependents(mAppRow.appImportance);
        }
        if (mDashboardFeatureProvider.isEnabled()) {
            final Preference pref = FeatureFactory.getFactory(activity)
                    .getApplicationFeatureProvider(activity)
                    .newAppHeaderController(this /* fragment */, null /* appHeader */)
                    .setIcon(mAppRow.icon)
                    .setLabel(mAppRow.label)
                    .setPackageName(mAppRow.pkg)
                    .setUid(mAppRow.uid)
                    .setAppNotifPrefIntent(mAppRow.settingsIntent)
                    .setButtonActions(AppHeaderController.ActionType.ACTION_APP_INFO,
                            AppHeaderController.ActionType.ACTION_NOTIF_PREFERENCE)
                    .done(getPrefContext());
            getPreferenceScreen().addPreference(pref);
        }
    }

    @Override
    protected void updateDependents(int importance) {
        super.updateDependents(importance);
        setVisible(mChannels,
                !(mChannelList.isEmpty() || importance == NotificationManager.IMPORTANCE_NONE));
    }

    private List<ResolveInfo> queryNotificationConfigActivities() {
        if (DEBUG) Log.d(TAG, "APP_NOTIFICATION_PREFS_CATEGORY_INTENT is "
                + APP_NOTIFICATION_PREFS_CATEGORY_INTENT);
        final List<ResolveInfo> resolveInfos = mPm.queryIntentActivities(
                APP_NOTIFICATION_PREFS_CATEGORY_INTENT,
                0 //PackageManager.MATCH_DEFAULT_ONLY
        );
        return resolveInfos;
    }

    private void collectConfigActivities(ArrayMap<String, AppRow> rows) {
        final List<ResolveInfo> resolveInfos = queryNotificationConfigActivities();
        applyConfigActivities(rows, resolveInfos);
    }

    private void applyConfigActivities(ArrayMap<String, AppRow> rows,
            List<ResolveInfo> resolveInfos) {
        if (DEBUG) Log.d(TAG, "Found " + resolveInfos.size() + " preference activities"
                + (resolveInfos.size() == 0 ? " ;_;" : ""));
        for (ResolveInfo ri : resolveInfos) {
            final ActivityInfo activityInfo = ri.activityInfo;
            final ApplicationInfo appInfo = activityInfo.applicationInfo;
            final AppRow row = rows.get(appInfo.packageName);
            if (row == null) {
                if (DEBUG) Log.v(TAG, "Ignoring notification preference activity ("
                        + activityInfo.name + ") for unknown package "
                        + activityInfo.packageName);
                continue;
            }
            if (row.settingsIntent != null) {
                if (DEBUG) Log.v(TAG, "Ignoring duplicate notification preference activity ("
                        + activityInfo.name + ") for package "
                        + activityInfo.packageName);
                continue;
            }
            row.settingsIntent = new Intent(APP_NOTIFICATION_PREFS_CATEGORY_INTENT)
                    .setClassName(activityInfo.packageName, activityInfo.name);
        }
    }
}