/*
 * Copyright (C) 2012 The Android Open Source Project
 * modified
 * SPDX-License-Identifier: Apache-2.0 AND GPL-3.0-only
 */

package helium314.keyboard.latin;

import android.content.Context;
import android.media.AudioManager;
import android.os.Vibrator;
import android.view.HapticFeedbackConstants;
import android.view.View;

import helium314.keyboard.keyboard.internal.keyboard_parser.floris.KeyCode;
import helium314.keyboard.latin.common.Constants;
import helium314.keyboard.latin.settings.SettingsValues;

/**
 * This class gathers audio feedback and haptic feedback functions.
 * <p>
 * It offers a consistent and simple interface that allows LatinIME to forget about the
 * complexity of settings and the like.
 */
public final class AudioAndHapticFeedbackManager {
    private AudioManager mAudioManager;
    private Vibrator mVibrator;

    private SettingsValues mSettingsValues;
    private boolean mSoundOn;

    private static final AudioAndHapticFeedbackManager sInstance =
            new AudioAndHapticFeedbackManager();

    public static AudioAndHapticFeedbackManager getInstance() {
        return sInstance;
    }

    private AudioAndHapticFeedbackManager() {
        // Intentional empty constructor for singleton.
    }

    public static void init(final Context context) {
        sInstance.initInternal(context);
    }

    private void initInternal(final Context context) {
        mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
        mVibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
    }

    public void performHapticAndAudioFeedback(final int code,
            final View viewToPerformHapticFeedbackOn) {
        performHapticFeedback(viewToPerformHapticFeedbackOn);
        performAudioFeedback(code);
    }

    public boolean hasVibrator() {
        return mVibrator != null && mVibrator.hasVibrator();
    }

    public void vibrate(final long milliseconds) {
        if (mVibrator == null) {
            return;
        }
        mVibrator.vibrate(milliseconds);
    }

    private boolean reevaluateIfSoundIsOn() {
        if (mSettingsValues == null || !mSettingsValues.mSoundOn || mAudioManager == null) {
            return false;
        }
        return mAudioManager.getRingerMode() == AudioManager.RINGER_MODE_NORMAL;
    }

    public void performAudioFeedback(final int code) {
        // if mAudioManager is null, we can't play a sound anyway, so return
        if (mAudioManager == null) {
            return;
        }
        if (!mSoundOn) {
            return;
        }
        final int sound = switch (code) {
            case KeyCode.DELETE -> AudioManager.FX_KEYPRESS_DELETE;
            case Constants.CODE_ENTER -> AudioManager.FX_KEYPRESS_RETURN;
            case Constants.CODE_SPACE -> AudioManager.FX_KEYPRESS_SPACEBAR;
            default -> AudioManager.FX_KEYPRESS_STANDARD;
        };
        mAudioManager.playSoundEffect(sound, mSettingsValues.mKeypressSoundVolume);
    }

    public void performHapticFeedback(final View viewToPerformHapticFeedbackOn) {
        if (!mSettingsValues.mVibrateOn) {
            return;
        }
        if (mSettingsValues.mKeypressVibrationDuration >= 0) {
            vibrate(mSettingsValues.mKeypressVibrationDuration);
            return;
        }
        // Go ahead with the system default
        if (viewToPerformHapticFeedbackOn != null) {
            viewToPerformHapticFeedbackOn.performHapticFeedback(
                    HapticFeedbackConstants.KEYBOARD_TAP,
                    HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING);
        }
    }

    public void onSettingsChanged(final SettingsValues settingsValues) {
        mSettingsValues = settingsValues;
        mSoundOn = reevaluateIfSoundIsOn();
    }

    public void onRingerModeChanged() {
        mSoundOn = reevaluateIfSoundIsOn();
    }
}