package nova.monadic_sfx.ui.components.todo

import monix.bio.Task
import monix.execution.cancelables.CompositeCancelable
import nova.monadic_sfx.implicits.FontIcon
import nova.monadic_sfx.implicits.IconLiteral
import nova.monadic_sfx.implicits.JFXButton
import nova.monadic_sfx.implicits.JFXListView
import nova.monadic_sfx.implicits.JFXTextField
import nova.monadic_sfx.implicits.JavaFXMonixObservables._
import nova.monadic_sfx.implicits.MenuItem
import nova.monadic_sfx.util.reactive._
import org.gerweck.scalafx.util._
import scalafx.Includes._
import scalafx.beans.property.ObjectProperty
import scalafx.beans.property.StringProperty
import scalafx.geometry.Insets
import scalafx.scene.Node
import scalafx.scene.control.ContextMenu
import scalafx.scene.control.ListCell
import scalafx.scene.control.SelectionMode
import scalafx.scene.layout.HBox
import scalafx.scene.text.Text
import monix.{eval => me}

object TodoListView {
  def apply(
      store: MonixProSubject[
        TodoListStore.Command,
        (TodoListStore.Command, TodoListStore.State)
      ]
  ): Task[Node] =
    Task.deferAction(implicit s =>
      Task {
        val cc = CompositeCancelable()
        val todos =
          store.map { case (_, state) => state.todos }
        // Todo(-1, "").some
        val _selectedItems = ObjectProperty(Seq.empty[Todo])

        new HBox {
          padding = Insets(5)
          val _content = StringProperty("")
          children = Seq(
            new JFXTextField {
              text ==> _content
            },
            new JFXListView[Todo] {
              def selectedItems = selectionModel().selectedItems.view

              cc += items <-- todos

              val emptyCell = ObjectProperty(new HBox)
              cellFactory = _ =>
                new ListCell[Todo] {
                  val _text = StringProperty("")
                  val _graphic = ObjectProperty(
                    new HBox {
                      children = Seq(
                        new FontIcon {
                          iconSize = 10
                          iconLiteral = IconLiteral.Gmi10k
                        },
                        new Text {
                          text <== _text
                        }
                      )
                    }
                  )

                  item.asOption.map(
                    _.fold("")(todo => s"${todo.id} - ${todo.content}")
                  ) ==> _text

                  graphic <== item.asOption.flatMap(
                    _.fold(emptyCell)(_ => _graphic)
                  )

                }

              selectionModel().selectionMode = SelectionMode.Multiple
              selectionModel().selectedItems.observableSeqValue ==> _selectedItems

              contextMenu = new ContextMenu {
                items ++= Seq(
                  new MenuItem {
                    text = "Add"
                    // obsAction.useLazyEval(TodoListStore.Add("blah3")) --> store
                  },
                  new MenuItem {
                    text = "Delete"
                    obsAction.useIterableEval(_ =>
                      selectedItems
                        .map(todo => TodoListStore.Delete(todo.id))
                        .toList
                    ) --> store
                  },
                  new MenuItem {
                    text = "Edit"
                  }
                )
              }
            },
            new JFXButton {
              text = "Add"
              disable <== _selectedItems.map(_.length > 0)
              obsAction
                .useLazyEval(me.Task(TodoListStore.Add(_content()))) --> store
            },
            new JFXButton {
              text = "Edit"
              disable <== _selectedItems.map(_.length > 1)
              obsAction.useLazyEval(
                me.Task(
                  TodoListStore.Edit(
                    _selectedItems
                      .map(_.headOption.map(_.id).getOrElse(-1))
                      .value,
                    _content()
                  )
                )
              ) --> store
            }
          )
        }
      }
    )
}