extends Spatial

export(NodePath) var torsoPath
export(NodePath) var cameraPath
export(NodePath) var rayCastPath
export(NodePath) var viewPortPath

const ROT_MOD = 500 
const ROT_DECLINE = 0.1

var _viewRot = false
var _prev_mouse_pos
var _camera : Camera
var _rayCast : RayCast
var _torso : RigidBody
var _viewport : Viewport

var _velx = 0
var _vely = 0
var _attachment_point : Spatial

var _default_grav

signal start_fight()

# Called when the node enters the scene tree for the first time.
func _ready():
	_default_grav = PhysicsServer.area_get_param(get_viewport().find_world().get_space(), PhysicsServer.AREA_PARAM_GRAVITY)
	PhysicsServer.area_set_param(get_viewport().find_world().get_space(), PhysicsServer.AREA_PARAM_GRAVITY, 0)
	_torso = get_node(torsoPath) as RigidBody
	_camera = get_node(cameraPath) as Camera
	_rayCast = get_node(rayCastPath) as RayCast
	_viewport = get_node(viewPortPath) as Viewport


func _process(delta):
	if _viewRot:
		var mouse_pos = get_viewport().get_mouse_position()
		
		_velx = (mouse_pos.x - _prev_mouse_pos.x) * delta
		_vely = (mouse_pos.y - _prev_mouse_pos.y) * delta
		
		_prev_mouse_pos = mouse_pos
	
	if not(_velx < 0.001 and _velx > -0.001) or not(_vely < 0.001 and _vely > -0.001) or _viewRot:
		_torso.rotate_x(_vely * ROT_MOD * delta * PI/180 - global_transform.basis.get_euler().x)
		_torso.rotate_y(_velx * ROT_MOD * delta * PI/180 - global_transform.basis.get_euler().y)
		
		var decline = (1 - ROT_DECLINE * (delta*100))
		
		if decline > 1:
			decline = 1
		elif decline < 0:
			decline = 0
		
		_velx *= decline
		_vely *= decline


func _physics_process(delta):
	if _viewRot:
		var mouse_pos = _viewport.get_viewport().get_mouse_position()
		
		#set origin of rayCast
		var orig = _camera.project_ray_origin(mouse_pos)
		
		#set cast_to of rayCast
		_rayCast.translation = orig
		_rayCast.cast_to = orig + _camera.project_ray_normal(mouse_pos) * 1000.0
		
		if _rayCast.is_colliding():
			# collider will be the node hit
			make_it_shine(false)
			var temp = _rayCast.get_collider().get_parent()
			if temp.has_node("OmniLight"):
				_attachment_point = temp
			make_it_shine(true)


func _input(event):
	if event is InputEventMouseButton:
		if event.pressed:
			if _viewport.get_viewport().get_mouse_position().x >= 0:
				if event.button_index == BUTTON_WHEEL_UP and _attachment_point != null:
					if _attachment_point.get_node("Limb") != null:
						_attachment_point.get_node("Limb").rotate_z(0.1)
				elif event.button_index == BUTTON_WHEEL_DOWN and _attachment_point != null:
					if _attachment_point.get_node("Limb") != null:
						_attachment_point.get_node("Limb").rotate_z(-0.1)
				else:
					_prev_mouse_pos = event.position
					_viewRot = true
		else: 
			_viewRot = false


func body_part_chosen(params):
	#no _attachment_point 
	if _attachment_point != null:
		var limb = _attachment_point.get_node("Limb")
		
		#adding only possible if no first child
		#if limb.get_child(0) == null:
		#	limb.add_child(BodyPartLoader.bodyparts[params].instance())
		
		#if spot already taken, DELETE
		if limb.get_child(0) != null:
			delete_body_part()
		limb.add_child(BodyPartLoader.bodyparts[params].instance())


func make_it_shine(highlight : bool):
	if _attachment_point != null:
		_attachment_point.get_node("OmniLight").visible = highlight


func delete_body_part():
	if _attachment_point != null:
		var body_part = _attachment_point.get_node("Limb").get_child(0)
		if body_part != null:
			body_part.queue_free()


func _on_Start_pressed():
	PhysicsServer.area_set_param(get_viewport().find_world().get_space(), PhysicsServer.AREA_PARAM_GRAVITY, _default_grav)
	
	emit_signal("start_fight", _torso)