CoreBottomSheet (MVVM)

abstract class CoreBottomSheet<VB : ViewBinding, VM : CoreViewModel<*>>(private val isFullScreen: Boolean = true) :
    BottomSheetDialogFragment() {

    protected lateinit var binding: VB

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        retainInstance = true
    }

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        this.binding = onInflateViewBinding(inflater, container)
        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        onSetupObservers(viewModel)
        setupCoreObservers()
        onViewReady(view, savedInstanceState)
        setupObserveConnection()
    }

    private fun setupCoreObservers() {
        viewModel.onNavigateAction().observe(viewLifecycleOwner) { navDir ->
            navDir?.let { findNavController().navigate(it) }
        }
    }

    private fun setupObserveConnection() {
        lifecycleScope.launch {
            sharedViewModel.onConnectedStateUpdate().collect { hasConnection ->
                withContext(Dispatchers.Main) {
                    if (hasConnection) binding.root.snackbarOk(R.string.network_available)
                    else binding.root.snackbarErr(R.string.no_connection)
                }
            }
        }
    }

    abstract val viewModel: VM
    abstract val sharedViewModel: MainViewModel

    abstract fun onInflateViewBinding(inflater: LayoutInflater, container: ViewGroup?): VB
    abstract fun onSetupObservers(viewModel: VM)
    abstract fun onViewReady(view: View, savedInstanceState: Bundle?)

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        val bottomSheetDialog = BottomSheetDialog(
            requireContext(),
            R.style.AppBottomSheetDialogTheme
        )

        bottomSheetDialog.dismissWithAnimation = false
        bottomSheetDialog.behavior.isFitToContents = !isFullScreen
        bottomSheetDialog.behavior.skipCollapsed = isFullScreen
        bottomSheetDialog.behavior.state = if (isFullScreen) BottomSheetBehavior.STATE_EXPANDED
        else BottomSheetBehavior.STATE_COLLAPSED
        bottomSheetDialog.window?.statusBarColor = Color.TRANSPARENT
        bottomSheetDialog.window?.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)

        bottomSheetDialog.behavior.addBottomSheetCallback(object :
            BottomSheetBehavior.BottomSheetCallback() {
            override fun onSlide(p0: View, p1: Float) {}

            override fun onStateChanged(p0: View, state: Int) {
                if (state == BottomSheetBehavior.STATE_HIDDEN) {
                    dismiss()
                }
            }
        })

        return bottomSheetDialog
    }
}