/*
 * Copyright (C) 2024 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.settingslib.bluetooth

import kotlinx.coroutines.channels.awaitClose
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.callbackFlow
import kotlinx.coroutines.launch

/** Returns a [Flow] that emits a [Unit] whenever the headset audio mode changes. */
val LocalBluetoothManager.headsetAudioModeChanges: Flow<Unit>
    get() {
        return callbackFlow {
            val callback =
                object : BluetoothCallback {
                    override fun onAudioModeChanged() {
                        launch { send(Unit) }
                    }
                }

            eventManager.registerCallback(callback)
            awaitClose { eventManager.unregisterCallback(callback) }
        }
    }