kt

class PropertySelectionFragment : BaseFragment(), PropertyItemOnClickListener {

    companion object {
        val TAG: String = PropertySelectionFragment::class.java.name
        fun newInstance() = PropertySelectionFragment()
    }

    @Inject
    lateinit var propertyListAdapter: PropertyListAdapter

    @Inject
    lateinit var appFragmentFlowRouter: AppFragmentFlowRouter

    @Inject
    lateinit var linearLayoutManager: RecyclerView.LayoutManager

    @Inject
    lateinit var propertySelectionViewModel: PropertySelectionViewModel

    override val layout: Int
        get() = R.layout.fragment_property_selection

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        setUpRecyclerView()

        displayFirstScreen()

        observeViewModelState()

        disableInteractivityBeforePropertiesFetched()

        propertySelectionViewModel.fetchProperties()
    }

    private fun setUpRecyclerView() {

        propertyListAdapter.setOnClickListener(this@PropertySelectionFragment)

        property_list_recyclerview.apply {
            layoutManager = linearLayoutManager
            adapter = propertyListAdapter
        }
    }

    fun observeViewModelState() {
        propertySelectionViewModel.state.observe(this, Observer {
            handleState(it)
        })
    }

    fun handleState(state: PropertySelectionState) {
        when (state) {

            is PropertySelectionState.NetworkError -> displayErrorLoadingPropertiesView()
            is PropertySelectionState.GenericError -> displayErrorLoadingPropertiesView()
            is PropertySelectionState.PropertiesLoaded -> {
                propertyListAdapter.updateItems(state.properties)
                select_property_title.setOnClickListener { displaySecondScreen() }
                select_property_icon.visibility = View.VISIBLE
            }
            is PropertySelectionState.Loading -> displayLoadingView()
            is PropertySelectionState.EmptyPropertyList -> displayEmptyView()

            is PropertySelectionState.SuccessfullySavedSelectedProperty -> {
                appFragmentFlowRouter.removeAllFragmentsFromBackStack(requireActivity())
                appFragmentFlowRouter.goToHomeScreen(requireActivity())
            }
            is PropertySelectionState.ErrorSavingSelectedProperty -> displayErrorSavingSelectedPropertyView()
        }
    }

    private fun displayErrorSavingSelectedPropertyView() {
        println("error saving selected property")
    }

    private fun displayEmptyView() {
        println("property list is empty")
    }

    private fun displayLoadingView() {
        println("property list loading")
    }

    fun displayErrorLoadingPropertiesView() {
        println("property list error loading properties")
    }

    private fun disableInteractivityBeforePropertiesFetched() {
        select_property_icon.visibility = View.GONE
    }

    private fun displayFirstScreen() {
        property_list_recyclerview.visibility = View.GONE
        property_list_icon.visibility = View.GONE
    }

    private fun displaySecondScreen() {
        mini_living_logo.visibility = View.GONE
        select_property_title.visibility = View.GONE
        select_property_icon.visibility = View.GONE
        property_list_recyclerview.visibility = View.VISIBLE
        property_list_icon.visibility = View.VISIBLE
    }

    override fun onPropertyItemClicked(property: Property) {
        propertySelectionViewModel.saveSelectedProperty(property.id)
    }
}