/*
 * Copyright (C) 2025 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.systemui.util.composable.kairos

import androidx.compose.runtime.State as ComposeState
import androidx.compose.runtime.mutableStateOf
import com.android.systemui.kairos.BuildScope
import com.android.systemui.kairos.ExperimentalKairosApi
import com.android.systemui.kairos.State as KairosState
import com.android.systemui.kairos.changes
import com.android.systemui.kairos.util.NameTag

/**
 * Returns a [ComposeState] that is kept hydrated with the current value of [state] within this
 * [BuildScope].
 */
@ExperimentalKairosApi
fun <T> BuildScope.toComposeState(state: KairosState<T>, name: NameTag? = null): ComposeState<T> {
    val initial = state.sample()
    val cState = mutableStateOf(initial)
    state.changes.observe(name = name) { cState.value = it }
    return cState
}