/*
 * Copyright (C) 2016 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.ActivityThread;
import android.app.INotificationManager;
import android.app.NotificationManager;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.AudioManager;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.ServiceManager;
import android.os.Vibrator;
import android.provider.DeviceConfig;
import android.service.notification.NotificationListenerService;
import android.text.TextUtils;
import android.util.Log;

import androidx.lifecycle.OnLifecycleEvent;

import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.config.sysui.SystemUiDeviceConfigFlags;
import com.android.settings.R;
import com.android.settings.Utils;
import com.android.settingslib.core.lifecycle.Lifecycle;

import java.util.Objects;
import java.util.Set;

/**
 * This slider can represent both ring and notification, if the corresponding streams are aliased,
 * and only ring if the streams are not aliased.
 */
public class RingVolumePreferenceController extends VolumeSeekBarPreferenceController {

    private static final String TAG = "RingVolumePreferenceController";
    private static final String KEY_RING_VOLUME = "ring_volume";

    private Vibrator mVibrator;
    private int mRingerMode = AudioManager.RINGER_MODE_NORMAL;
    private ComponentName mSuppressor;
    private final RingReceiver mReceiver = new RingReceiver();
    private final H mHandler = new H();

    private int mMuteIcon;

    private int mNormalIconId;
    @VisibleForTesting
    int mVibrateIconId;
    @VisibleForTesting
    int mSilentIconId;

    @VisibleForTesting
    int mTitleId;

    private boolean mSeparateNotification;

    private INotificationManager mNoMan;

    private static final boolean CONFIG_DEFAULT_VAL = false;

    public RingVolumePreferenceController(Context context) {
        this(context, KEY_RING_VOLUME);
    }

    public RingVolumePreferenceController(Context context, String key) {
        super(context, key);
        mVibrator = (Vibrator) mContext.getSystemService(Context.VIBRATOR_SERVICE);
        if (mVibrator != null && !mVibrator.hasVibrator()) {
            mVibrator = null;
        }
        mSeparateNotification = DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_SYSTEMUI,
                SystemUiDeviceConfigFlags.VOLUME_SEPARATE_NOTIFICATION, CONFIG_DEFAULT_VAL);
        loadPreferenceIconResources(mSeparateNotification);
        updateRingerMode();
    }

    private void loadPreferenceIconResources(boolean separateNotification) {
        if (separateNotification) {
            mTitleId = R.string.separate_ring_volume_option_title;
            mNormalIconId = R.drawable.ic_ring_volume;
            mSilentIconId = R.drawable.ic_ring_volume_off;
        } else {
            mTitleId = R.string.ring_volume_option_title;
            mNormalIconId = R.drawable.ic_notifications;
            mSilentIconId = R.drawable.ic_notifications_off_24dp;
        }
        // todo: set a distinct vibrate icon for ring vs notification
        mVibrateIconId = R.drawable.ic_volume_ringer_vibrate;
    }

    /**
     * As the responsibility of this slider changes, so should its title & icon
     */
    public void onDeviceConfigChange(DeviceConfig.Properties properties) {
        Set<String> changeSet = properties.getKeyset();
        if (changeSet.contains(SystemUiDeviceConfigFlags.VOLUME_SEPARATE_NOTIFICATION)) {
            boolean valueUpdated = readSeparateNotificationVolumeConfig();
            if (valueUpdated) {
                updateEffectsSuppressor();
                selectPreferenceIconState();
                setPreferenceTitle();
            }
        }
    }

    /**
     * side effect: updates the cached value of the config, and also the icon
     * @return has the config changed?
     */
    private boolean readSeparateNotificationVolumeConfig() {
        boolean newVal = DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_SYSTEMUI,
                SystemUiDeviceConfigFlags.VOLUME_SEPARATE_NOTIFICATION, CONFIG_DEFAULT_VAL);

        boolean valueUpdated = newVal != mSeparateNotification;
        if (valueUpdated) {
            mSeparateNotification = newVal;
            loadPreferenceIconResources(newVal);
        }

        return valueUpdated;
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
    @Override
    public void onResume() {
        super.onResume();
        mReceiver.register(true);
        readSeparateNotificationVolumeConfig();
        DeviceConfig.addOnPropertiesChangedListener(DeviceConfig.NAMESPACE_SYSTEMUI,
                ActivityThread.currentApplication().getMainExecutor(), this::onDeviceConfigChange);
        updateEffectsSuppressor();
        selectPreferenceIconState();
        setPreferenceTitle();
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
    @Override
    public void onPause() {
        super.onPause();
        mReceiver.register(false);
        DeviceConfig.removeOnPropertiesChangedListener(this::onDeviceConfigChange);
    }

    @Override
    public String getPreferenceKey() {
        return KEY_RING_VOLUME;
    }

    @Override
    public int getAvailabilityStatus() {
        return Utils.isVoiceCapable(mContext) && !mHelper.isSingleVolume()
                ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
    }

    @Override
    public boolean isSliceable() {
        return TextUtils.equals(getPreferenceKey(), KEY_RING_VOLUME);
    }

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

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

    @Override
    public int getAudioStream() {
        return AudioManager.STREAM_RING;
    }

    @Override
    public int getMuteIcon() {
        return mMuteIcon;
    }

    @VisibleForTesting
    void updateRingerMode() {
        final int ringerMode = mHelper.getRingerModeInternal();
        if (mRingerMode == ringerMode) return;
        mRingerMode = ringerMode;
        selectPreferenceIconState();
    }

    private void updateEffectsSuppressor() {
        final ComponentName suppressor = NotificationManager.from(mContext).getEffectsSuppressor();
        if (Objects.equals(suppressor, mSuppressor)) return;

        if (mNoMan == null) {
            mNoMan = INotificationManager.Stub.asInterface(
                    ServiceManager.getService(Context.NOTIFICATION_SERVICE));
        }

        final int hints;
        try {
            hints = mNoMan.getHintsFromListenerNoToken();
        } catch (android.os.RemoteException ex) {
            Log.w(TAG, "updateEffectsSuppressor: " + ex.getMessage());
            return;
        }

        if (hintsMatch(hints, DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_SYSTEMUI,
                SystemUiDeviceConfigFlags.VOLUME_SEPARATE_NOTIFICATION, false))) {
            mSuppressor = suppressor;
            if (mPreference != null) {
                final String text = SuppressorHelper.getSuppressionText(mContext, suppressor);
                mPreference.setSuppressionText(text);
            }
        }
    }

    @VisibleForTesting
    boolean hintsMatch(int hints, boolean notificationSeparated) {
        return (hints & NotificationListenerService.HINT_HOST_DISABLE_CALL_EFFECTS) != 0
                || (hints & NotificationListenerService.HINT_HOST_DISABLE_EFFECTS) != 0
                || ((hints & NotificationListenerService.HINT_HOST_DISABLE_NOTIFICATION_EFFECTS)
                != 0 && !notificationSeparated);
    }

    @VisibleForTesting
    void setPreference(VolumeSeekBarPreference volumeSeekBarPreference) {
        mPreference = volumeSeekBarPreference;
    }

    @VisibleForTesting
    void setVibrator(Vibrator vibrator) {
        mVibrator = vibrator;
    }

    private void selectPreferenceIconState() {
        if (mPreference != null) {
            if (mRingerMode == AudioManager.RINGER_MODE_NORMAL) {
                mPreference.showIcon(mNormalIconId);
            } else {
                if (mRingerMode == AudioManager.RINGER_MODE_VIBRATE && mVibrator != null) {
                    mMuteIcon = mVibrateIconId;
                } else {
                    mMuteIcon = mSilentIconId;
                }
                mPreference.showIcon(mMuteIcon);
            }
        }
    }

    /**
     * This slider can represent both ring and notification, or only ring.
     * Note: This cannot be used in the constructor, as the reference to preference object would
     * still be null.
     */
    private void setPreferenceTitle() {
        if (mPreference != null) {
            mPreference.setTitle(mTitleId);
        }
    }

    private final class H extends Handler {
        private static final int UPDATE_EFFECTS_SUPPRESSOR = 1;
        private static final int UPDATE_RINGER_MODE = 2;

        private H() {
            super(Looper.getMainLooper());
        }

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case UPDATE_EFFECTS_SUPPRESSOR:
                    updateEffectsSuppressor();
                    break;
                case UPDATE_RINGER_MODE:
                    updateRingerMode();
                    break;
            }
        }
    }

    private class RingReceiver extends BroadcastReceiver {
        private boolean mRegistered;

        public void register(boolean register) {
            if (mRegistered == register) return;
            if (register) {
                final IntentFilter filter = new IntentFilter();
                filter.addAction(NotificationManager.ACTION_EFFECTS_SUPPRESSOR_CHANGED);
                filter.addAction(AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION);
                mContext.registerReceiver(this, filter);
            } else {
                mContext.unregisterReceiver(this);
            }
            mRegistered = register;
        }

        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (NotificationManager.ACTION_EFFECTS_SUPPRESSOR_CHANGED.equals(action)) {
                mHandler.sendEmptyMessage(H.UPDATE_EFFECTS_SUPPRESSOR);
            } else if (AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION.equals(action)) {
                mHandler.sendEmptyMessage(H.UPDATE_RINGER_MODE);
            }
        }
    }

}