/*
 * Copyright KG Soft
 *
 * 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.kgurgul.cpuinfo.features.temperature

import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import com.kgurgul.cpuinfo.domain.model.TemperatureItem
import com.kgurgul.cpuinfo.domain.observable.TemperatureDataObservable
import com.kgurgul.cpuinfo.domain.observe
import kotlinx.collections.immutable.ImmutableList
import kotlinx.collections.immutable.persistentListOf
import kotlinx.collections.immutable.toImmutableList
import kotlinx.coroutines.flow.SharingStarted
import kotlinx.coroutines.flow.combine
import kotlinx.coroutines.flow.stateIn

class TemperatureViewModel(
    temperatureFormatter: TemperatureFormatter,
    temperatureDataObservable: TemperatureDataObservable,
) : ViewModel() {

    val uiStateFlow =
        combine(
                temperatureDataObservable.observe(),
                temperatureDataObservable.isAdminRequiredFlow(),
            ) { temperatureResult, isAdminRequired ->
                UiState(
                    temperatureFormatter = temperatureFormatter,
                    isLoading = temperatureResult.isLoading,
                    temperatureItems = temperatureResult.items.toImmutableList(),
                    isAdminRequired = isAdminRequired,
                )
            }
            .stateIn(
                viewModelScope,
                SharingStarted.WhileSubscribed(5_000),
                UiState(temperatureFormatter = temperatureFormatter),
            )

    data class UiState(
        val temperatureFormatter: TemperatureFormatter,
        val isLoading: Boolean = true,
        val temperatureItems: ImmutableList<TemperatureItem> = persistentListOf(),
        val isAdminRequired: Boolean = false,
    )
}
