# ChecklistDetailsViewModel.kt

    /*
     * The MIT License
     *
     * Original work sponsored and donated by The Danish Health Data Authority (http://www.sundhedsdatastyrelsen.dk)
     *
     * Copyright (C) 2021 The Danish Health Data Authority (http://www.sundhedsdatastyrelsen.dk)
     *
     *
     * Permission is hereby granted, free of charge, to any person obtaining a copy of
     * this software and associated documentation files (the "Software"), to deal in
     * the Software without restriction, including without limitation the rights to
     * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
     * of the Software, and to permit persons to whom the Software is furnished to do
     * so, subject to the following conditions:
     *
     *
     * The above copyright notice and this permission notice shall be included in all
     * copies or substantial portions of the Software.
     *
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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     * SOFTWARE.
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    package dk.nsp.mingraviditet.ui.main.knowledge.checklist

    import androidx.hilt.Assisted
    import androidx.lifecycle.LiveData
    import androidx.lifecycle.MediatorLiveData
    import androidx.lifecycle.MutableLiveData
    import androidx.lifecycle.SavedStateHandle
    import androidx.lifecycle.ViewModel
    import androidx.lifecycle.viewModelScope
    import com.commonsense.android.kotlin.base.extensions.coroutines.launchIO
    import dagger.hilt.android.lifecycle.HiltViewModel
    import dk.nsp.domain.knowledge.Checklist
    import dk.nsp.domain.knowledge.ChecklistItem
    import dk.nsp.domain.repository.ChecklistRepository
    import dk.nsp.domain.repository.DataCardRepository
    import dk.nsp.mingraviditet.domain.ExpandCollapseEnum
    import dk.nsp.mingraviditet.util.android.recycler.RecyclerAdapterView
    import dk.nsp.mingraviditet.util.extensions.toSingleEvent
    import dk.nsp.mingraviditet.util.livedata.SingleEvent
    import dk.nsp.shared.Failed
    import dk.nsp.shared.Success
    import javax.inject.Inject

    @HiltViewModel
    class ChecklistDetailsViewModel @Inject constructor(
        private val checklistRepository: ChecklistRepository,
        private val dataCardRepository: DataCardRepository,
        @Assisted private val savedStateHandle: SavedStateHandle
    ) : ViewModel() {

        private val _onError: MutableLiveData<SingleEvent<String>> =
            MutableLiveData<SingleEvent<String>>()
        val onError: LiveData<SingleEvent<String>> = _onError

        val checklist: LiveData<Checklist> = MediatorLiveData<Checklist>().apply {
            addSource(checklistRepository.checklists) {
                it.firstOrNull { it.id == savedStateHandle.get("checklistId") }
                    ?.let { currentChecklist ->
                        postValue(currentChecklist)
                        checklistAdapterViews.postValue(createCards(currentChecklist))
                    }
            }
        }

        private val _onExpandCollapse: MutableLiveData<ExpandCollapseEnum> = MutableLiveData()
        val onExpandCollapse: LiveData<ExpandCollapseEnum> = _onExpandCollapse

        fun toggleExpandCollapse() {
            val expanded = _onExpandCollapse.value ?: ExpandCollapseEnum.Collapsed
            _onExpandCollapse.postValue(expanded.toggle())
        }

        val checklistAdapterViews: MutableLiveData<List<RecyclerAdapterView<*>>> = MutableLiveData()

        private val _expandedCards: MutableList<String> = mutableListOf()

        private fun createCards(checklist: Checklist): List<ChecklistCard> {
            return checklist.items.map {
                ChecklistCard(ChecklistCardData(it,
                    _expandedCards.contains(it.id),
                    onExpandCollapse = { expanded ->
                        if (expanded == ExpandCollapseEnum.Expanded) {
                            _expandedCards.add(it.id)
                        } else {
                            _expandedCards.remove(it.id)
                        }
                    }, onCheck = {
                        toggleChecklistItem(checklist, it)
                    })
                )
            }
        }

        init {
            dataCardRepository.currentDataCard.observeForever { }
        }

        private fun toggleChecklistItem(checklist: Checklist, checklistItem: ChecklistItem) {
            viewModelScope.launchIO {

                val episodeOfCareId = dataCardRepository.currentDataCard.value?.episodeOfCareIdentifier

                val updatedChecklistItem =
                    checklistRepository.updateChecklistItem(
                        this,
                        episodeOfCareId ?: "relates-to-checklist",
                        checklist,
                        checklistItem
                    ).await()

                when (updatedChecklistItem) {
                    is Success -> {
                    }
                    is Failed -> {
                        _onError.postValue(
                            (updatedChecklistItem.error.message ?: "Fejl").toSingleEvent()
                        )
                        checklistAdapterViews.postValue(createCards(checklist))
                    }
                }
            }
        }

        fun checklistHasDescription(): Boolean {
            return checklist.value?.description != null
        }
    }