package application.controller
  
  import application.model.MessageListener
  import application.model.Vessel

  import application.model.observableSelectedVessel

  import application.model.observableVessel

  import javafx.collections.FXCollections
  import javafx.collections.ObservableList

  import javafx.fxml.FXML
  import javafx.fxml.Initializable

  import javafx.scene.control.ListCell
  import javafx.scene.control.ListView
  import javafx.scene.control.MultipleSelectionModel
  import javafx.scene.control.SelectionMode

  import javafx.scene.input.MouseEvent

  import java.net.URL
  import java.util.*

  class VesselListPanelController : Initializable, MessageListener {

      @FXML

      var shipListView: ListView<String?> = ListView()

      private var shipList: ObservableList<String?> = FXCollections.observableArrayList()

  
      override fun initialize(location: URL?, resources: ResourceBundle?) {

          shipListView.items = shipList

          observableVessel.listeners.add(this)
          shipListView.selectionModel.selectedItemProperty().addListener { _, _, newValue ->

              if (newValue == null) {

                  observableSelectedVessel.value = Vessel(null)

              } else {

                  observableSelectedVessel.value = observableVessel.vessels[newValue]!!

              }

          }

          setCellFactory()

      }

      override fun onValueChanged(newValue: MutableMap<String?, Vessel>) {

          shipList.clear()
          shipList.addAll(newValue.keys)
      }

      private fun setCellFactory() {
          val selectionModel: MultipleSelectionModel<String?>? = shipListView.selectionModel
          selectionModel?.selectionMode = SelectionMode.SINGLE
          shipListView.setCellFactory {
              val cell = ListCell<String?>()
              cell.textProperty().bind(cell.itemProperty())
              cell.addEventFilter(MouseEvent.MOUSE_PRESSED) { event: MouseEvent ->
                  shipListView.requestFocus()
                  if (!cell.isEmpty) {
                      val index = cell.index
                      if (selectionModel!!.selectedIndices.contains(index)) {
                          selectionModel.clearSelection()
                      } else {
                          selectionModel.select(index)
                      }
                      event.consume()
                  }
              }
              cell
          }
      }
  }