/*
 * Copyright 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.intentresolver.data.repository

import com.android.intentresolver.shared.model.ActivityModel
import dagger.hilt.android.scopes.ActivityRetainedScoped
import javax.inject.Inject
import kotlinx.atomicfu.atomic

/** An [ActivityModel] repository that captures the first value. */
@ActivityRetainedScoped
class ActivityModelRepository @Inject constructor() {
    private val _value = atomic<ActivityModel?>(null)

    val value: ActivityModel
        get() = requireNotNull(_value.value) { "Repository has not been initialized" }

    fun initialize(block: () -> ActivityModel) {
        if (_value.value == null) {
            _value.compareAndSet(null, block())
        }
    }
}