package jp.ymir.taskReporter.ui
import java.awt.Insets
import java.util.Calendar
import jp.ymir.taskReporter.core._
import scala.collection.immutable._
import scala.swing._
import scala.swing.event._

class TaskEditor extends GridBagPanel {
  import GridBagPanel._

  case class TaskUpdated(t: Task) extends Event

  def task: (Calendar => Task) = d => Task(
    date                   = d,
    ticketID               = noneIfEmpty(ticketID.text).map(_.toInt),
    title                  = title.text,
    expectedCompletionDate = expectedCompletionDate.calendar.getOrElse(Task.endOfCurrentHalf),
    deadline               = deadline.calendar,
    status                 = status.selection.item,
    description            = noneIfEmpty(description.text)
  )

  def task_=(t: Task) = {
    ticketID.text                   = t.ticketID.fold("")(_.toString)
    title.text                      = t.title
    expectedCompletionDate.calendar = Some(t.expectedCompletionDate)
    deadline.calendar               = t.deadline
    status.selection.item           = t.status
    description.text                = t.description.getOrElse("")
  }

  private val commonInsets = new Insets(2, 3, 2, 3)

  private def noneIfEmpty[T <% StringLike[_]](str: T): Option[T] = str match {
    case "" => None
    case _  => Some(str)
  }

  private val ticketID = new TextField(6) {
    def isDigit(c : Char) = c >= '0' && c <= '9'
    inputVerifier       = _ => wrapString(text).forall(isDigit)
    horizontalAlignment = Alignment.Right
    peer.setMargin(commonInsets)
  }
  add(
    new Label("チケットID"),
    new Constraints { gridx = 0; gridy = 0 })
  add(
    ticketID,
    new Constraints() {
      gridx = 1; gridy = 0; anchor = Anchor.West; insets = commonInsets
    })
  ticketID.minimumSize = ticketID.preferredSize

  private val title = new TextField() {
    peer.setMargin(commonInsets)
  }
  add(
    new Label("作業名"),
    new Constraints { gridx = 0; gridy = 1 })
  add(
    title,
    new Constraints() {
      gridx = 1; gridy = 1; fill = Fill.Horizontal; weightx = 1.0
      insets = commonInsets
    })

  private val expectedCompletionDate = new DateChooser {
    dateFormatString = "yyyy-MM-dd"
    calendarChooser.todayButtonVisible = true
    calendarChooser.weekOfYearVisible  = false
  }
  add(
    new Label("作業完了予定年月日"),
    new Constraints { gridx = 0; gridy = 2 })
  add(
    expectedCompletionDate,
    new Constraints() {
      gridx = 1; gridy = 2; anchor = Anchor.West
      ipadx = 3; ipady = 2; insets = commonInsets
    })
  expectedCompletionDate.minimumSize = expectedCompletionDate.preferredSize

  private val deadline = new DateChooser {
    dateFormatString = "yyyy-MM-dd"
    calendarChooser.nullDateButtonVisible = true
    calendarChooser.todayButtonVisible    = true
    calendarChooser.weekOfYearVisible     = false
  }
  add(
    new Label("タスク期限"),
    new Constraints { gridx = 0; gridy = 3 })
  add(
    deadline,
    new Constraints() {
      gridx = 1; gridy = 3; anchor = Anchor.West
      ipadx = 3; ipady = 3; insets = commonInsets
    })
  deadline.minimumSize = deadline.preferredSize

  private val status = new ComboBox[Task.Status](Task.Status.all)
  add(
    new Label("状態"),
    new Constraints { gridx = 0; gridy = 4 })
  add(
    status,
    new Constraints {
      gridx = 1; gridy = 4; anchor = Anchor.West
      ipadx = 3; ipady = 3; insets = commonInsets
    })

  private val description = new TextArea() {
    rows = 5
    peer.setMargin(commonInsets)
  }
  private val scrollingDescription = new ScrollPane(description)
  add(
    new Label("説明"),
    new Constraints { gridx = 0; gridy = 5 })
  add(
    scrollingDescription,
    new Constraints() {
      gridx = 1; gridy = 5; fill = Fill.Horizontal; weightx = 1.0
      insets = commonInsets
    })
  scrollingDescription.minimumSize = scrollingDescription.preferredSize
}