EVENT_TYPES = {
  1 => :create,
  2 => :closed,
  3 => :enter,
  4 => :showed,
  5 => :show_request,
  6 => :mouse_press,
  7 => :mouse_drag,
  8 => :mouse_release,
  9 => :key_press,
  10 => :key_release,
  11 => :closed_temp,
  12 => :configure_request,
  13 => :resize_request
}.freeze


def handle_event(event)
  case EVENT_TYPES[event[:type]]


  when :create
    $all_windows << event[:window]
    return unless event[:override_redirect].zero?
    X.subscribe event[:window]


  when :closed
    $all_windows.delete event[:window]
    $windows[event[:window]]&.delete
    X.focus $root


  when :enter
    X.focus event[:window]


  when :show_request
    monitor = current_monitor
    if $windows[event[:window]].nil?
      monitor[:workspaces][monitor[:selected_workspace]].create event[:window]
      X.show event[:window]
      $all_windows.each do |window|
        above = `xprop -id #{window} _NET_WM_STATE`
        X.send_to_top window if above.include?("ABOVE")
      end
    end
    X.focus event[:window]


  when :mouse_press
    $mousebind_actions[[event[:btn], event[:state]]]&.call(event)
    return if event[:is_root] != 0
    return if $windows[event[:window]].nil?
    return if event[:state] != 1
    $mouse_data[:btn] = event[:btn]
    $mouse_data[:window] = $windows[event[:window]]
    X.grab_pointer $root
    $mouse_data[:pointer] = X.get_pointer
    if $mouse_data[:window].floating
      $mouse_data[:mode] = :floating
      $mouse_data[:geometry] = X.get_geometry event[:window]
    else
      $mouse_data[:mode] = :tiled
    end

  when :mouse_drag
    mouse_pos = X.get_pointer
    if $mouse_data[:mode] == :floating
      dx = mouse_pos[:x] - $mouse_data[:pointer][:x]
      dy = mouse_pos[:y] - $mouse_data[:pointer][:y]
      if $mouse_data[:btn] == 1
        $mouse_data[:window].move $mouse_data[:geometry][:x] + dx, $mouse_data[:geometry][:y] + dy
      elsif $mouse_data[:btn] == 3
        $mouse_data[:window]&.resize [$mouse_data[:geometry][:width] + dx, 50].max,
                                     [$mouse_data[:geometry][:height] + dy, 50].max,
                                     true
      end
    elsif $mouse_data[:mode] == :tiled
      if $mouse_data[:btn] == 1
        monitor = current_monitor
        find_targets = monitor[:workspaces][monitor[:selected_workspace]].insertion_rects
        target = drop_target(find_targets, mouse_pos[:x], mouse_pos[:y])
        if target
          if $rect[:target] != target
            X.destroy $rect[:id] if $rect[:id]
            $rect[:id] = X.draw_rectangle target[:x], target[:y], target[:width], target[:height], 0x500070
            $rect[:target] = target
          end
        else
          X.destroy $rect[:id] if $rect[:id]
          $rect = {}
        end
      elsif $mouse_data[:btn] == 3
          # TODO: tile resize . dynamic
      end
    end

  when :mouse_release
    if $mouse_data[:mode] == :tiled
      if $mouse_data[:btn] == 1
        if $rect[:id]
          X.destroy $rect[:id]
          monitor = current_monitor
          monitor[:workspaces][monitor[:selected_workspace]].drop $rect[:target][:drop], $mouse_data[:window]
        end
        $rect = {}
      end
    end
    X.ungrab_pointer
    $mouse_data = {}


  when :key_press
    $keybind_actions[[event[:btn], event[:state]]]&.call(event)

  when :key_release
    # TODO


  when :configure_request
    $windows[event[:window]]&.resize event[:width], event[:height]

  when :resize_request
    $windows[event[:window]]&.resize event[:width], event[:height]
  end
end