extends Spatial

var _mouse_look = false
var _mouse_position = Vector2( 0.0, 0.0 )
var _yaw = 0.0
var _pitch = 0.0
var _total_yaw = 0.0
var _total_pitch = 0.0
var _current_camera_speed = 1.0

export(int) var yaw_limit = 360
export(int) var pitch_limit = 360
export(float) var camera_sensitivity = 0.5
export(float) var camera_smoothness = 0.5
export(float) var camera_speed = 1.0
export(float) var camera_accel = 10.0

var iTime=0.0
var iFrame=0

func _ready():
    self._current_camera_speed = self.camera_speed
    
    $settings.show()
    
func _process( delta ):

    iTime+=delta
    iFrame+=1
    
    if Input.is_action_pressed("move_up"):
        $dummy/camera_stand.translate( Vector3( 0.0, self._current_camera_speed*delta, 0.0 ) )
    elif Input.is_action_pressed("move_down"):
        $dummy/camera_stand.translate( Vector3( 0.0,-self._current_camera_speed*delta, 0.0 ) )
    elif Input.is_action_pressed("move_forward"):
        $dummy/camera_stand.translate( Vector3( 0.0, 0.0,-self._current_camera_speed*delta ) )
    elif Input.is_action_pressed("move_backward"):
        $dummy/camera_stand.translate( Vector3( 0.0, 0.0, self._current_camera_speed*delta ) )
    if Input.is_action_pressed("move_left"):
        $dummy/camera_stand.translate( Vector3(-self._current_camera_speed*delta, 0.0, 0.0 ) )
    elif Input.is_action_pressed("move_right"):
        $dummy/camera_stand.translate( Vector3( self._current_camera_speed*delta, 0.0, 0.0 ) )
        
        
    if _mouse_look:
        _update_mouselook()

func _update_mouselook():
    _mouse_position *= self.camera_sensitivity
    _yaw = _yaw * self.camera_smoothness + _mouse_position.x * (1.0 - self.camera_smoothness)
    _pitch = _pitch * self.camera_smoothness + _mouse_position.y * (1.0 - self.camera_smoothness)
    _mouse_position = Vector2(0, 0)

    if yaw_limit < 360:
        _yaw = clamp(_yaw, -yaw_limit - _total_yaw, yaw_limit - _total_yaw)
    if pitch_limit < 360:
        _pitch = clamp(_pitch, -pitch_limit - _total_pitch, pitch_limit - _total_pitch)

    _total_yaw += _yaw
    _total_pitch += _pitch

    $dummy/camera_stand.rotate_y(deg2rad(-_yaw))
    $dummy/camera_stand.rotate_object_local(Vector3(1,0,0), deg2rad(-_pitch))

func _input(event):
    
    if event.is_action_pressed( "move_look" ):
        Input.set_mouse_mode( Input.MOUSE_MODE_CAPTURED )
        self._mouse_look = true
    elif event.is_action_released( "move_look" ):
        Input.set_mouse_mode( Input.MOUSE_MODE_VISIBLE )
        self._mouse_look = false
    
    if event is InputEventMouseMotion:
        if _mouse_look:
            _mouse_position = event.relative

    if event.is_action_pressed( "move_zoom_in" ):
        $dummy/camera_stand/camera.set_fov( $dummy/camera_stand/camera.get_fov()-1.0 )
    elif event.is_action_pressed( "move_zoom_out" ):
        $dummy/camera_stand/camera.set_fov( $dummy/camera_stand/camera.get_fov()+1.0 )
        
    if event.is_action_pressed( "move_speed" ):
        self._current_camera_speed = self.camera_speed + self.camera_accel
    elif event.is_action_released( "move_speed" ):
        self._current_camera_speed = self.camera_speed
        
    if event.is_action_pressed( "ui_settings_window" ):
        $settings.visible = !$settings.visible