sub Main()

  ' If the Rooibos files are included in deployment, run tests
  if (type(Rooibos__Init) = "Function") then Rooibos__Init()

  ' The main function that runs when the application is launched.
  m.screen = CreateObject("roSGScreen")
  m.port = CreateObject("roMessagePort")
  m.screen.setMessagePort(m.port)
  m.scene = m.screen.CreateScene("JFScene")

  m.screen.show()
  m.overhang = CreateObject("roSGNode", "JFOverhang")

  themeScene()

  app_start:
  ' First thing to do is validate the ability to use the API
  LoginFlow()


  ' Confirm the configured server and user work
  group = CreateLibraryGroup()
  m.overhang.title = group.overhangTitle
  m.scene.appendChild(group)

  m.scene.observeField("backPressed", m.port)
  m.scene.observeField("optionsPressed", m.port)

  ' This is the core logic loop. Mostly for transitioning between scenes
  ' This now only references m. fields so could be placed anywhere, in theory
  ' "group" is always "whats on the screen"
  ' m.scene's children is the "previous view" stack
  while(true)
    msg = wait(0, m.port)
    if type(msg) = "roSGScreenEvent" and msg.isScreenClosed() then
      print "CLOSING SCREEN"
      return
    else if isNodeEvent(msg, "backPressed")
      ' Pop a group off the stack and expose what's below
      n = m.scene.getChildCount() - 1
      if n = 1
        ' Overhang + last scene... this is the end
        return
      end if
      m.scene.removeChildIndex(n)
      group = m.scene.getChild(n - 1)
      m.overhang.title = group.overhangTitle
      m.overhang.visible = true
      if group.lastFocus <> invalid
        group.lastFocus.setFocus(true)
      else
        group.setFocus(true)
      end if
      group.visible = true
    else if isNodeEvent(msg, "optionsPressed")
      group.lastFocus = group.focusedChild
      panel = group.findNode("options")
      panel.visible = true
      panel.findNode("panelList").setFocus(true)
    else if isNodeEvent(msg, "closeSidePanel")
      if group.lastFocus <> invalid
        group.lastFocus.setFocus(true)
      else
        group.setFocus(true)
      end if
    else if isNodeEvent(msg, "librarySelected")
      ' If you select a library from ANYWHERE, follow this flow
      node = getMsgPicker(msg, "LibrarySelect")
      if node.type = "movies"
        group.lastFocus = group.focusedChild
        group.setFocus(false)
        group.visible = false

        group = CreateMovieListGroup(node)
        m.overhang.title = group.overhangTitle
        m.scene.appendChild(group)
      else
        ' TODO - switch on more node types
        message_dialog("This library type is not yet implemented: " + node.type)
      end if
    else if isNodeEvent(msg, "movieSelected")
      ' If you select a movie from ANYWHERE, follow this flow
      node = getMsgPicker(msg, "picker")

      group.lastFocus = group.focusedChild
      group.setFocus(false)
      group.visible = false

      group = CreateMovieDetailsGroup(node)
      m.scene.appendChild(group)
      m.overhang.title = group.overhangTitle
    else if isNodeEvent(msg, "search_value")
      query = msg.getRoSGNode().search_value
      group.findNode("SearchBox").visible = false
      options = group.findNode("SearchSelect")
      options.visible = true
      options.setFocus(true)

      results = SearchMedia(query)
      options.itemData = results
      options.query = query
    else if isNodeEvent(msg, "pageSelected")
      group.pageNumber = msg.getRoSGNode().pageSelected
      ' TODO - assume its a movie for now
      MovieLister(group, 50)
      ' TODO - abstract away the "picker" node
      group.findNode("picker").setFocus(true)
    else if isNodeEvent(msg, "itemSelected")
      ' Search item selected
      node = getMsgPicker(msg)
      group.lastFocus = group.focusedChild
      group.setFocus(false)
      group.visible = false

      ' TODO - swap this based on target.mediatype
      ' types: [ Episode, Movie, Audio, Person, Studio, MusicArtist ]
      group = CreateMovieDetailsGroup(node)
      m.scene.appendChild(group)
      m.overhang.title = group.overhangTitle

    else if isNodeEvent(msg, "buttonSelected")
      ' If a button is selected, we have some determining to do
      btn = getButton(msg)
      if btn.id = "play-button"
        ' TODO - Do a better job of picking the last focus
        ' This is currently page layout Group, button Group, then button
        group.lastFocus = group.focusedChild.focusedChild.focusedChild
        group.setFocus(false)
        group.visible = false
        video_id = group.id

        group = CreateVideoPlayerGroup(video_id)
        m.scene.appendChild(group)
        group.setFocus(true)
        group.control = "play"
        m.overhang.visible = false
      else if btn.id = "watched-button"
        movie = group.itemContent
        if movie.watched
          UnmarkItemWatched(movie.id)
        else
          MarkItemWatched(movie.id)
        end if
        movie.watched = not movie.watched
      else if btn.id = "favorite-button"
        movie = group.itemContent
        if movie.favorite
          UnmarkItemFavorite(movie.id)
        else
          MarkItemFavorite(movie.id)
        end if
        movie.favorite = not movie.favorite
      end if
    else if isNodeEvent(msg, "optionSelected")
      button = msg.getRoSGNode()
      if button.id = "goto_search"
        ' Exit out of the side panel
        panel.visible = false
        if group.lastFocus <> invalid
          group.lastFocus.setFocus(true)
        else
          group.setFocus(true)
        end if
        group.lastFocus = group.focusedChild
        group.setFocus(false)
        group.visible = false

        group = CreateSearchPage()
        m.scene.appendChild(group)
        m.overhang.title = group.overhangTitle
        group.findNode("SearchBox").findNode("search-input").setFocus(true)
        group.findNode("SearchBox").findNode("search-input").active = true
      else if button.id = "change_server"
        unset_setting("server")
        unset_setting("port")
        SignOut()
        wipe_groups()
        goto app_start
      else if button.id = "sign_out"
        SignOut()
        wipe_groups()
        goto app_start
      else if button.id = "add_user"
        unset_setting("active_user")
        unset_setting("server")
        unset_setting("port")
        wipe_groups()
        goto app_start
      end if
    else
      print type(msg)
      print msg
    end if
  end while

end sub

sub LoginFlow()
  'Collect Jellyfin server and user information
  start_login:
  if get_setting("server") = invalid or ServerInfo() = invalid then
    print "Get server details"
    CreateServerGroup()
  end if

  if get_setting("active_user") = invalid then
    print "Get user login"
    CreateSigninGroup()
  end if

  m.user = AboutMe()
  if m.user = invalid or m.user.id <> get_setting("active_user")
    print "Login failed, restart flow"
    unset_setting("active_user")
    goto start_login
  end if

  wipe_groups()
end sub

sub RunScreenSaver()
  print "Starting screensaver..."
  screen = createObject("roSGScreen")
  m.port = createObject("roMessagePort")
  screen.setMessagePort(m.port)

  scene = screen.createScene("Screensaver")
  screen.Show()

  while(true)
    msg = wait(8000, m.port)
    if (msg <> invalid)
      msgType = type(msg)
      if msgType = "roSGScreenEvent"
        if msg.isScreenClosed() then return
      end if
    end if
  end while

end sub

sub wipe_groups()
  ' The 1 remaining child should be the overhang
  while(m.scene.getChildCount() > 1)
    m.scene.removeChildIndex(1)
  end while
end sub