/*
 * Copyright (C) 2018 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.bluetooth;

import static android.app.slice.Slice.EXTRA_TOGGLE_STATE;

import android.annotation.ColorInt;
import android.app.PendingIntent;
import android.bluetooth.BluetoothAdapter;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.Uri;
import android.provider.SettingsSlicesContract;
import android.support.v4.graphics.drawable.IconCompat;

import com.android.internal.logging.nano.MetricsProto;
import com.android.settings.R;
import com.android.settings.SubSettings;
import com.android.settings.connecteddevice.BluetoothDashboardFragment;
import com.android.settings.search.DatabaseIndexingUtils;
import com.android.settings.slices.SliceBroadcastReceiver;
import com.android.settingslib.bluetooth.LocalBluetoothAdapter;
import com.android.settingslib.bluetooth.LocalBluetoothManager;

import androidx.slice.Slice;
import androidx.slice.builders.ListBuilder;
import androidx.slice.builders.SliceAction;

public class BluetoothSliceBuilder {

    private static final String TAG = "BluetoothSliceBuilder";

    /**
     * Backing Uri for the Bluetooth Slice.
     */
    public static final Uri BLUETOOTH_URI = new Uri.Builder()
            .scheme(ContentResolver.SCHEME_CONTENT)
            .authority(SettingsSlicesContract.AUTHORITY)
            .appendPath(SettingsSlicesContract.PATH_SETTING_ACTION)
            .appendPath(SettingsSlicesContract.KEY_BLUETOOTH)
            .build();

    /**
     * Action notifying a change on the BluetoothSlice.
     */
    public static final String ACTION_BLUETOOTH_SLICE_CHANGED =
            "com.android.settings.bluetooth.action.BLUETOOTH_MODE_CHANGED";

    public static final IntentFilter INTENT_FILTER = new IntentFilter();

    static {
        INTENT_FILTER.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
        INTENT_FILTER.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
    }

    private BluetoothSliceBuilder() {
    }

    /**
     * Return a Bluetooth Slice bound to {@link #BLUETOOTH_URI}.
     * <p>
     * Note that you should register a listener for {@link #INTENT_FILTER} to get changes for
     * Bluetooth.
     */
    public static Slice getSlice(Context context) {
        final boolean isBluetoothEnabled = isBluetoothEnabled();
        final CharSequence title = context.getText(R.string.bluetooth_settings);
        final IconCompat icon = IconCompat.createWithResource(context,
                R.drawable.ic_settings_bluetooth);
        @ColorInt final int color = com.android.settings.Utils.getColorAccent(context);
        final PendingIntent toggleAction = getBroadcastIntent(context);
        final PendingIntent primaryAction = getPrimaryAction(context);
        final SliceAction primarySliceAction = new SliceAction(primaryAction, icon, title);
        final SliceAction toggleSliceAction = new SliceAction(toggleAction, null /* actionTitle */,
                isBluetoothEnabled);

        return new ListBuilder(context, BLUETOOTH_URI, ListBuilder.INFINITY)
                .setAccentColor(color)
                .addRow(b -> b
                        .setTitle(title)
                        .addEndItem(toggleSliceAction)
                        .setPrimaryAction(primarySliceAction))
                .build();
    }

    public static Intent getIntent(Context context) {
        final String screenTitle = context.getText(R.string.bluetooth_settings_title).toString();
        final Uri contentUri = new Uri.Builder().appendPath(
                SettingsSlicesContract.KEY_BLUETOOTH).build();
        return DatabaseIndexingUtils.buildSearchResultPageIntent(context,
                BluetoothDashboardFragment.class.getName(), null /* key */, screenTitle,
                MetricsProto.MetricsEvent.SETTINGS_CONNECTED_DEVICE_CATEGORY)
                .setClassName(context.getPackageName(), SubSettings.class.getName())
                .setData(contentUri);
    }

    /**
     * Update the current Bluetooth status to the boolean value keyed by
     * {@link android.app.slice.Slice#EXTRA_TOGGLE_STATE} on {@param intent}.
     */
    public static void handleUriChange(Context context, Intent intent) {
        final boolean newBluetoothState = intent.getBooleanExtra(EXTRA_TOGGLE_STATE, false);
        final LocalBluetoothAdapter adapter = LocalBluetoothManager.getInstance(context,
                null /* callback */).getBluetoothAdapter();

        adapter.setBluetoothEnabled(newBluetoothState);
        // Do not notifyChange on Uri. The service takes longer to update the current value than it
        // does for the Slice to check the current value again. Let {@link SliceBroadcastRelay}
        // handle it.
    }

    private static boolean isBluetoothEnabled() {
        final BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
        return adapter.isEnabled();
    }

    private static PendingIntent getPrimaryAction(Context context) {
        final Intent intent = getIntent(context);
        return PendingIntent.getActivity(context, 0 /* requestCode */,
                intent, 0 /* flags */);
    }

    private static PendingIntent getBroadcastIntent(Context context) {
        final Intent intent = new Intent(ACTION_BLUETOOTH_SLICE_CHANGED)
                .setClass(context, SliceBroadcastReceiver.class);
        return PendingIntent.getBroadcast(context, 0 /* requestCode */, intent,
                PendingIntent.FLAG_CANCEL_CURRENT);
    }
}