/*
 * 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 android.hardware.display;

import android.annotation.TestApi;
import android.content.Context;
import android.os.Build;
import android.os.SystemProperties;
import android.provider.Settings;
import android.text.TextUtils;

import com.android.internal.R;

/**
 * AmbientDisplayConfiguration encapsulates reading access to the configuration of ambient display.
 *
 * {@hide}
 */
@TestApi
public class AmbientDisplayConfiguration {

    private final Context mContext;
    private final boolean mAlwaysOnByDefault;

    /** {@hide} */
    @TestApi
    public AmbientDisplayConfiguration(Context context) {
        mContext = context;
        mAlwaysOnByDefault = mContext.getResources().getBoolean(R.bool.config_dozeAlwaysOnEnabled);
    }

    /** {@hide} */
    public boolean enabled(int user) {
        return pulseOnNotificationEnabled(user)
                || pulseOnLongPressEnabled(user)
                || alwaysOnEnabled(user)
                || wakeScreenGestureEnabled(user)
                || pickupGestureEnabled(user)
                || tapGestureEnabled(user)
                || doubleTapGestureEnabled(user);
    }

    /** {@hide} */
    public boolean pulseOnNotificationEnabled(int user) {
        return boolSettingDefaultOn(Settings.Secure.DOZE_ENABLED, user)
                && pulseOnNotificationAvailable();
    }

    /** {@hide} */
    public boolean pulseOnNotificationAvailable() {
        return ambientDisplayAvailable();
    }

    /** {@hide} */
    public boolean pickupGestureEnabled(int user) {
        return boolSettingDefaultOn(Settings.Secure.DOZE_PICK_UP_GESTURE, user)
                && dozePickupSensorAvailable();
    }

    /** {@hide} */
    public boolean dozePickupSensorAvailable() {
        return mContext.getResources().getBoolean(R.bool.config_dozePulsePickup);
    }

    /** {@hide} */
    public boolean tapGestureEnabled(int user) {
        return boolSettingDefaultOn(Settings.Secure.DOZE_TAP_SCREEN_GESTURE, user)
                && tapSensorAvailable();
    }

    /** {@hide} */
    public boolean tapSensorAvailable() {
        return !TextUtils.isEmpty(tapSensorType());
    }

    /** {@hide} */
    public boolean doubleTapGestureEnabled(int user) {
        return boolSettingDefaultOn(Settings.Secure.DOZE_DOUBLE_TAP_GESTURE, user)
                && doubleTapSensorAvailable();
    }

    /** {@hide} */
    public boolean doubleTapSensorAvailable() {
        return !TextUtils.isEmpty(doubleTapSensorType());
    }

    /** {@hide} */
    public boolean wakeScreenGestureAvailable() {
        return mContext.getResources()
                .getBoolean(R.bool.config_dozeWakeLockScreenSensorAvailable);
    }

    /** {@hide} */
    public boolean wakeScreenGestureEnabled(int user) {
        return boolSettingDefaultOn(Settings.Secure.DOZE_WAKE_SCREEN_GESTURE, user)
                && wakeScreenGestureAvailable();
    }

    /** {@hide} */
    public long getWakeLockScreenDebounce() {
        return mContext.getResources().getInteger(R.integer.config_dozeWakeLockScreenDebounce);
    }

    /** {@hide} */
    public String doubleTapSensorType() {
        return mContext.getResources().getString(R.string.config_dozeDoubleTapSensorType);
    }

    /** {@hide} */
    public String tapSensorType() {
        return mContext.getResources().getString(R.string.config_dozeTapSensorType);
    }

    /** {@hide} */
    public String longPressSensorType() {
        return mContext.getResources().getString(R.string.config_dozeLongPressSensorType);
    }

    /** {@hide} */
    public boolean pulseOnLongPressEnabled(int user) {
        return pulseOnLongPressAvailable() && boolSettingDefaultOff(
                Settings.Secure.DOZE_PULSE_ON_LONG_PRESS, user);
    }

    private boolean pulseOnLongPressAvailable() {
        return !TextUtils.isEmpty(longPressSensorType());
    }

    /**
     * Returns if Always-on-Display functionality is enabled on the display for a specified user.
     *
     * {@hide}
     */
    @TestApi
    public boolean alwaysOnEnabled(int user) {
        return boolSetting(Settings.Secure.DOZE_ALWAYS_ON, user, mAlwaysOnByDefault ? 1 : 0)
                && alwaysOnAvailable() && !accessibilityInversionEnabled(user);
    }

    /**
     * Returns if Always-on-Display functionality is available on the display.
     *
     * {@hide}
     */
    @TestApi
    public boolean alwaysOnAvailable() {
        return (alwaysOnDisplayDebuggingEnabled() || alwaysOnDisplayAvailable())
                && ambientDisplayAvailable();
    }

    /**
     * Returns if Always-on-Display functionality is available on the display for a specified user.
     *
     *  {@hide}
     */
    @TestApi
    public boolean alwaysOnAvailableForUser(int user) {
        return alwaysOnAvailable() && !accessibilityInversionEnabled(user);
    }

    /** {@hide} */
    public String ambientDisplayComponent() {
        return mContext.getResources().getString(R.string.config_dozeComponent);
    }

    /** {@hide} */
    public boolean accessibilityInversionEnabled(int user) {
        return boolSettingDefaultOff(Settings.Secure.ACCESSIBILITY_DISPLAY_INVERSION_ENABLED, user);
    }

    /** {@hide} */
    public boolean ambientDisplayAvailable() {
        return !TextUtils.isEmpty(ambientDisplayComponent());
    }

    private boolean alwaysOnDisplayAvailable() {
        return mContext.getResources().getBoolean(R.bool.config_dozeAlwaysOnDisplayAvailable);
    }

    private boolean alwaysOnDisplayDebuggingEnabled() {
        return SystemProperties.getBoolean("debug.doze.aod", false) && Build.IS_DEBUGGABLE;
    }

    private boolean boolSettingDefaultOn(String name, int user) {
        return boolSetting(name, user, 1);
    }

    private boolean boolSettingDefaultOff(String name, int user) {
        return boolSetting(name, user, 0);
    }

    private boolean boolSetting(String name, int user, int def) {
        return Settings.Secure.getIntForUser(mContext.getContentResolver(), name, def, user) != 0;
    }
}