# Gamepad HTML5 API
class Gamepad
  constructor: (pad) ->
    @gamepad = pad
    @map = @detectMapping(pad.id, navigator.userAgent)
    @pressed = @getPressed()
  detectMapping: (id, browser) ->
    for map in salet.view.gamepadmappings
      for device in map.supported
        if id.indexOf(device.id) != -1 and browser.indexOf(device.browser) != -1
          return map
      # mapping not found, return the first map for this browser
      for device in map.supported
        if browser.indexOf(device.browser) != -1
          return map
      # browser and device are not supported, just return the first map
      console.warn "Browser and device are not found, gamepad support not guaranteed."
      return salet.view.gamepadmappings[0]
  axis: (name) ->
    map = @map.axes[name]
    unless map?
      return 0
    if map.index?
      return @gamepad.axes[map.index]
    if map.buttonPositive? and @gamepad.buttons[map.buttonPositive].pressed
      return 1
    if map.buttonNegative? and @gamepad.buttons[map.buttonNegative].pressed
      return -1
    return 0
  button: (name) ->
    map = @map.buttons[name]
    unless map?
      return 0
    if map.index? and @gamepad.buttons[map.index]?
      return @gamepad.buttons[map.index].pressed
    if map.axis?
      if map.direction < 0
        return @gamepad.axes[map.axis] < -0.75
      else
        return @gamepad.axes[map.axis] > 0.75
    return false
  # Return the name of the pressed button
  getPressed: () ->
    for buttonname, button of @map.buttons
      if (
        @gamepad.buttons[button.index]? and
        @gamepad.buttons[button.index].pressed
      ) or (
        @gamepad.axes[button.axis] < -0.75 and
        button.direction < 0
      ) or (
        @gamepad.axes[button.axis] > 0.75 and
        button.direction > 0
      )
        return buttonname