/*
 * 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.display;

import android.app.Dialog;
import android.app.TimePickerDialog;
import android.app.settings.SettingsEnums;
import android.content.Context;
import android.hardware.display.ColorDisplayManager;
import android.hardware.display.NightDisplayListener;
import android.os.Bundle;

import androidx.preference.Preference;

import com.android.settings.R;
import com.android.settings.dashboard.DashboardFragment;
import com.android.settings.search.BaseSearchIndexProvider;
import com.android.settingslib.search.SearchIndexable;

import java.time.LocalTime;

/**
 * Settings screen for Night display.
 */
@SearchIndexable(forTarget = SearchIndexable.ALL & ~SearchIndexable.ARC)
public class NightDisplaySettings extends DashboardFragment
        implements NightDisplayListener.Callback {

    private static final String TAG = "NightDisplaySettings";

    private static final int DIALOG_START_TIME = 0;
    private static final int DIALOG_END_TIME = 1;

    private ColorDisplayManager mColorDisplayManager;
    private NightDisplayListener mNightDisplayListener;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        final Context context = getContext();
        mColorDisplayManager = context.getSystemService(ColorDisplayManager.class);
        mNightDisplayListener = new NightDisplayListener(context);
    }

    @Override
    public void onStart() {
        super.onStart();

        // Listen for changes only while visible.
        mNightDisplayListener.setCallback(this);
    }

    @Override
    public void onStop() {
        super.onStop();

        // Stop listening for state changes.
        mNightDisplayListener.setCallback(null);
    }

    @Override
    public boolean onPreferenceTreeClick(Preference preference) {
        if ("night_display_end_time".equals(preference.getKey())) {
            writePreferenceClickMetric(preference);
            showDialog(DIALOG_END_TIME);
            return true;
        } else if ("night_display_start_time".equals(preference.getKey())) {
            writePreferenceClickMetric(preference);
            showDialog(DIALOG_START_TIME);
            return true;
        }
        return super.onPreferenceTreeClick(preference);
    }

    @Override
    public Dialog onCreateDialog(final int dialogId) {
        if (dialogId == DIALOG_START_TIME || dialogId == DIALOG_END_TIME) {
            final LocalTime initialTime;
            if (dialogId == DIALOG_START_TIME) {
                initialTime = mColorDisplayManager.getNightDisplayCustomStartTime();
            } else {
                initialTime = mColorDisplayManager.getNightDisplayCustomEndTime();
            }

            final Context context = getContext();
            final boolean use24HourFormat = android.text.format.DateFormat.is24HourFormat(context);
            return new TimePickerDialog(context, (view, hourOfDay, minute) -> {
                final LocalTime time = LocalTime.of(hourOfDay, minute);
                if (dialogId == DIALOG_START_TIME) {
                    mColorDisplayManager.setNightDisplayCustomStartTime(time);
                } else {
                    mColorDisplayManager.setNightDisplayCustomEndTime(time);
                }
            }, initialTime.getHour(), initialTime.getMinute(), use24HourFormat);
        }
        return super.onCreateDialog(dialogId);
    }

    @Override
    public int getDialogMetricsCategory(int dialogId) {
        switch (dialogId) {
            case DIALOG_START_TIME:
                return SettingsEnums.DIALOG_NIGHT_DISPLAY_SET_START_TIME;
            case DIALOG_END_TIME:
                return SettingsEnums.DIALOG_NIGHT_DISPLAY_SET_END_TIME;
            default:
                return 0;
        }
    }

    @Override
    public void onActivated(boolean activated) {
        // Update activated and temperature preferences.
        updatePreferenceStates();
    }

    @Override
    public void onAutoModeChanged(int autoMode) {
        // Update auto mode, start time, and end time preferences.
        updatePreferenceStates();
    }

    @Override
    public void onColorTemperatureChanged(int colorTemperature) {
        // Update temperature preference.
        updatePreferenceStates();
    }

    @Override
    public void onCustomStartTimeChanged(LocalTime startTime) {
        // Update start time preference.
        updatePreferenceStates();
    }

    @Override
    public void onCustomEndTimeChanged(LocalTime endTime) {
        // Update end time preference.
        updatePreferenceStates();
    }

    @Override
    protected int getPreferenceScreenResId() {
        return R.xml.night_display_settings;
    }

    @Override
    public int getMetricsCategory() {
        return SettingsEnums.NIGHT_DISPLAY_SETTINGS;
    }

    @Override
    public int getHelpResource() {
        return R.string.help_url_night_display;
    }

    @Override
    protected String getLogTag() {
        return TAG;
    }

    public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
            new BaseSearchIndexProvider(R.xml.night_display_settings) {

                @Override
                protected boolean isPageSearchEnabled(Context context) {
                    return ColorDisplayManager.isNightDisplayAvailable(context);
                }
            };
}