/*
 * Copyright (C) 2019 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.accessibility;

import static com.android.internal.accessibility.AccessibilityShortcutController.COLOR_INVERSION_COMPONENT_NAME;
import static com.android.settings.accessibility.AccessibilityStatsLogUtils.logAccessibilityServiceEnabled;
import static com.android.settings.accessibility.AccessibilityUtil.State.OFF;
import static com.android.settings.accessibility.AccessibilityUtil.State.ON;

import android.app.settings.SettingsEnums;
import android.content.ContentResolver;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.provider.Settings;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.android.settings.R;
import com.android.settings.widget.SettingsMainSwitchPreference;

import java.util.ArrayList;
import java.util.List;

/** Settings page for color inversion. */
public class ToggleColorInversionPreferenceFragment extends ToggleFeaturePreferenceFragment {

    private static final String ENABLED = Settings.Secure.ACCESSIBILITY_DISPLAY_INVERSION_ENABLED;
    private final Handler mHandler = new Handler();
    private SettingsContentObserver mSettingsContentObserver;

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

    @Override
    protected void onPreferenceToggled(String preferenceKey, boolean enabled) {
        logAccessibilityServiceEnabled(mComponentName, enabled);
        Settings.Secure.putInt(getContentResolver(), ENABLED, enabled ? ON : OFF);
    }

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

    @Override
    protected void onRemoveSwitchPreferenceToggleSwitch() {
        super.onRemoveSwitchPreferenceToggleSwitch();
        mToggleServiceSwitchPreference.setOnPreferenceClickListener(null);
    }

    @Override
    protected void updateToggleServiceTitle(SettingsMainSwitchPreference switchPreference) {
        switchPreference.setTitle(R.string.accessibility_display_inversion_switch_title);
    }

    @Override
    protected void updateShortcutTitle(ShortcutPreference shortcutPreference) {
        shortcutPreference.setTitle(R.string.accessibility_display_inversion_shortcut_title);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        mComponentName = COLOR_INVERSION_COMPONENT_NAME;
        mPackageName = getText(R.string.accessibility_display_inversion_preference_title);
        mHtmlDescription = getText(R.string.accessibility_display_inversion_preference_subtitle);
        mImageUri = new Uri.Builder().scheme(ContentResolver.SCHEME_ANDROID_RESOURCE)
                .authority(getPrefContext().getPackageName())
                .appendPath(String.valueOf(R.raw.accessibility_color_inversion_banner))
                .build();
        final List<String> enableServiceFeatureKeys = new ArrayList<>(/* initialCapacity= */ 1);
        enableServiceFeatureKeys.add(ENABLED);
        mSettingsContentObserver = new SettingsContentObserver(mHandler, enableServiceFeatureKeys) {
            @Override
            public void onChange(boolean selfChange, Uri uri) {
                updateSwitchBarToggleSwitch();
            }
        };

        final View view = super.onCreateView(inflater, container, savedInstanceState);
        updateFooterPreference();
        return view;
    }

    private void updateFooterPreference() {
        final String title = getPrefContext().getString(
                R.string.accessibility_color_inversion_about_title);
        final String learnMoreContentDescription = getPrefContext().getString(
                R.string.accessibility_color_inversion_footer_learn_more_content_description);
        mFooterPreferenceController.setIntroductionTitle(title);
        mFooterPreferenceController.setupHelpLink(getHelpResource(), learnMoreContentDescription);
        mFooterPreferenceController.displayPreference(getPreferenceScreen());
    }

    @Override
    public void onResume() {
        super.onResume();
        updateSwitchBarToggleSwitch();
        mSettingsContentObserver.register(getContentResolver());
    }

    @Override
    public void onPause() {
        mSettingsContentObserver.unregister(getContentResolver());
        super.onPause();
    }

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

    @Override
    int getUserShortcutTypes() {
        return AccessibilityUtil.getUserShortcutTypesFromSettings(getPrefContext(),
                mComponentName);
    }

    @Override
    protected void updateSwitchBarToggleSwitch() {
        final boolean checked = Settings.Secure.getInt(getContentResolver(), ENABLED, OFF) == ON;
        if (mToggleServiceSwitchPreference.isChecked() == checked) {
            return;
        }
        mToggleServiceSwitchPreference.setChecked(checked);
    }
}
