class Person(var id : Long, var name : String)

class SimpleVM1_ViewModel : ViewModel() {

    val persons = mutableListOf(
            Person(1L, "Carl"),
            Person( 2L, "Edvin"),
            Person( 3L, "Thomas")
    ).observable()

    fun save(p : Person) {

        // should only be one
        val index = persons.indexOfFirst {
            it.id == p.id
        }

        // someone else might have deleted it b/c multiple windows
        if( index != -1 ) persons.set( index, p )
    }
}

class SimpleVM1_DetailsFragment : Fragment() {

    val vm : SimpleVM1_ViewModel by inject()

    val person : Person by param()

    val id_p = SimpleLongProperty()
    val name = SimpleStringProperty()

    override val root = vbox {

        gridpane {
            row {
                label("ID")
                textfield(id_p) {
                    isEditable = false
                }
            }
            row {
                label("Name")
                textfield(name)
            }
            padding = Insets(10.0)
            spacing = 4.0
        }
        separator()
        buttonbar {
            button("Save") {
                setOnAction {
                    vm.save(Person(id_p.value, name.value))
                    close()
                }
            }
            button("Cancel") {
                setOnAction {
                    close()
                }
            }
            padding = Insets(10.0)
        }
    }

    override fun onDock() {
        id_p.value = person.id
        name.value = person.name

        title = "Person ${person.id}"
    }
}

class SimpleVM1_MasterView : View("Simple VM1 Example") {

    val vm : SimpleVM1_ViewModel by inject()

    override val root = vbox {

        tableview(vm.persons) {
            column("ID", Person::id)
            column("Name", Person::name)
            onUserSelect {
                find<SimpleVM1_DetailsFragment>(
                        mapOf(SimpleVM1_DetailsFragment::person to it)
                ).openWindow()
            }
        }
    }
}

class SimpleVM1_App : App(SimpleVM1_MasterView::class)

fun main(args : Array<String>) {
    Application.launch(SimpleVM1_App::class.java, *args)
}