extends KinematicBody

# export variables
export(NodePath) var body_nodepath
export(NodePath) var lookingAt_nodepath
export(NodePath) var animationWalk_nodepath
export(NodePath) var animationFadeOut_nodepath
export(NodePath) var ui_interact_nodepath
export(NodePath) var camera_nodepath
export(int) var keycard_lvl
export(Array) var key_chain

# const
const GRAVITY = -24.8
const JUMP_SPEED = 8
const MOVE_SPEED = 6
const SPRINT_SPEED = 10
const ACCEL = 15.0
const MAX_SLOPE_ANGLE = 40
const MOUSE_SENSITIVITY = 0.05
const INTERACT_DISTANCE = 4

# private members
var _body: Spatial
var _camera: Camera
var _lookCast: RayCast
var _animationWalk: AnimationPlayer
var _animationFadeOut: AnimationPlayer
var _labelInteract: Label
var _dir = Vector3()
var _vel = Vector3()
var _is_sprinting : bool
var _is_in_illegal_area : bool
var _prev_look

# TODO: move to global
var _inventory: Control


func _ready():
	# Assign child node variables
	_body = get_node(body_nodepath) as Spatial # = $Body
	assert(null != _body)
	
	_camera = get_node(camera_nodepath) #as Camera
	assert(null != _camera)
	
	_animationWalk = get_node(animationWalk_nodepath) as AnimationPlayer
	assert(null != _animationWalk)
	
	_animationFadeOut = get_node(animationFadeOut_nodepath) as AnimationPlayer
	assert(null != _animationFadeOut)
	
	_labelInteract = get_node(ui_interact_nodepath) as Label
	assert(null != _labelInteract)
	
	# Setup mouse look
	Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
	_lookCast = get_node(lookingAt_nodepath) as RayCast
	_lookCast.cast_to = Vector3(0, 0, INTERACT_DISTANCE)
	
	_inventory = get_node("HUD")
	
	# setup collisions with Meldewesen
	var area = get_node("InteractArea") as Area
	assert(null != area)
	area.connect("area_entered", self, "_on_area_entered")
	area.connect("area_exited", self, "_on_area_exited")


func _physics_process(delta):
	process_input()
	process_movement(delta)
	process_collision_layers()

func _process(_delta):
	check_interact()
	process_animations()

func process_input():
	# Walking
	var input_movement_vector = Vector2()
	if Input.is_action_pressed("move_fwrd"):
		input_movement_vector.y += 1
	if Input.is_action_pressed("move_back"):
		input_movement_vector.y -= 1
	if Input.is_action_pressed("move_left"):
		input_movement_vector.x -= 1
	if Input.is_action_pressed("move_right"):
		input_movement_vector.x += 1
	
	# look around with mouse
	_dir = Vector3()
	var camera_transform = _camera.get_global_transform()
	_dir += -camera_transform.basis.z * input_movement_vector.y
	_dir += camera_transform.basis.x * input_movement_vector.x
	
	# jumping
	if Input.is_action_just_pressed("move_jump") and is_on_floor():
		_vel.y = JUMP_SPEED

	# sprinting
	_is_sprinting = Input.is_action_pressed("move_sprint")


func process_movement(delta):
	_vel.y += delta * GRAVITY

	# set movement speed
	var target = _dir * (SPRINT_SPEED if _is_sprinting else MOVE_SPEED)

	var hvel = _vel
	hvel = hvel.linear_interpolate(target, ACCEL * delta)
	_vel.x = hvel.x
	_vel.z = hvel.z
	_vel = move_and_slide(_vel, Vector3(0, 1, 0), 0.05, 4, deg2rad(MAX_SLOPE_ANGLE))


func process_animations():
	_animationWalk.playback_speed = _vel.length() / MOVE_SPEED


func process_collision_layers():
	var new_layer: int = 6
	
	if Pills.get_level() >= Pills.LEVELS.VERY_LOW:
		# If the masked view is almost invisible, collision with masked objects is disabled
		new_layer -= 1  # See collision layer names in editor
	
	collision_layer = new_layer
	collision_mask = new_layer


func check_interact():
	if _lookCast.is_colliding():
		var collider = _lookCast.get_collider()

		if null != collider and collider.is_in_group("Touchables"):
			#show interact tooltip
			_labelInteract.show()

			#enable outline of seen object
			collider.outline.show()
			if _prev_look != null and is_instance_valid(_prev_look):
				if _prev_look != collider:
					_prev_look.outline.hide()
			_prev_look = collider

			#do interaction
			if Input.is_action_just_pressed("interact"):
				collider.do_interact(self)
				if collider.is_in_group("Collectibles"):
					_inventory.add_item(collider.name)
		else:
			#stop showing interact tooltip and disable outline
			_labelInteract.hide()
			if _prev_look != null and is_instance_valid(_prev_look):
				_prev_look.outline.hide()
	elif _prev_look != null and is_instance_valid(_prev_look):
		#disable outline of last seen object
		_prev_look.outline.hide()
		_prev_look = null

		#stop showing interact tooltip
		_labelInteract.hide()


func _input(event):
	# capture mouse movement
	if event is InputEventMouseMotion:
		_camera.rotate_x(deg2rad(event.relative.y * MOUSE_SENSITIVITY * -1))
		self.rotate_y(deg2rad(event.relative.x * MOUSE_SENSITIVITY * -1))

		# Prevent player from doing a purzelbaum
		_camera.rotation_degrees.x = clamp(_camera.rotation_degrees.x, -70, 70)

func _on_area_entered (area: Area):
	if area.is_in_group("Enemy"):
		Logger.info("ermahgerd they touched :-o !")
		if _is_in_illegal_area: # or Pills.get_level() == 0: #< Pills.get_max() * 0.5:
			# TODO: check why this does not work as intended:
				#var player = AudioStreamPlayer3D.new()
				#var audio_file = "res://Resources/Audio/dino-eat.wav"
				#player.stream  = load("res://Resources/Audio/dino-eat.wav")
				#add_child(player)
				#Logger.info("should play sound again?")
				#player.play()
				#remove_child(player)
				#player. queue_free()
			get_node("AudioStreamPlayer3D").play()

			yield(get_node("AudioStreamPlayer3D"), "finished")
			_reset_scene() # TODO: call per event -> also raise if Meldewesen is looking at player and pill level reaches treshold!
	elif area.is_in_group("Forbidden"):
		Logger.info("entering forbidden area!")
		_is_in_illegal_area = true


func _on_area_exited (area: Area):
	if area.is_in_group("Forbidden"):
		Logger.info("leaving forbidden area!")
		_is_in_illegal_area = false


func _reset_scene ():
	# fade to black and restart scene
	_animationFadeOut.play("FadeOut")
	yield(_animationFadeOut, "animation_finished")

	# reset values
	_animationFadeOut.seek(0, true)
	get_tree().reload_current_scene()
	Pills._set_level(Pills.get_max())


func Is_in_Illegal_Area ():
	return _is_in_illegal_area