package tab.list

import cafe.adriel.voyager.core.model.StateScreenModel
import data.EGroup
import kotlinx.coroutines.coroutineScope
import kotlinx.coroutines.launch
import kotlinx.serialization.json.Json
import org.jetbrains.compose.resources.ExperimentalResourceApi
import veganenumbers.composeapp.generated.resources.Res.readBytes

class ListScreenModel : StateScreenModel<ListScreenModel.State>(State.Loading) {
    sealed class State {
        object Loading : State()
        data class Result(val eNumbers: List<EGroup>) : State()
    }

    /**
     * Reads JSON file containing all e numbers
     * @return List of grouped E Numbers in `EGroup` type
     */
    @OptIn(ExperimentalResourceApi::class)
    suspend fun getENumbers() {
        coroutineScope {
            launch {
                mutableState.value = State.Loading

                val bytes = readBytes("files/enumbers.json")
                val eNumbers = Json.decodeFromString<List<EGroup>>(bytes.decodeToString())

                mutableState.value = State.Result(eNumbers = eNumbers)
            }
        }
    }
}