PlayerDetection.gd

extends "res://Scripts/Character.gd"


const FOV_TOLERANCE = 20
const MAX_DETECTION_RANGE = 230
const RED = Color(1, .25, .25)
const WHITE = Color(1, 1, 1)


onready var Player = Global.Player

func _ready():
	add_to_group("npc")


func _process(delta):
		if Player_is_in_FOV_TOLERANCE() and Player_is_in_LOS():
			$Torch.color = RED 
			get_tree().call_group("SuspicionMeter", "player_seen")
		else:
			$Torch.color = WHITE


func Player_is_in_FOV_TOLERANCE():
		var NPC_facing_direction = Vector2(1,0).rotated(global_rotation)
		var direction_to_Player = (Global.Player.position - global_position).normalized()
	
		if abs(direction_to_Player.angle_to(NPC_facing_direction)) < deg2rad(FOV_TOLERANCE):
			return true
		else:
			return false
		
		
func Player_is_in_LOS():
	var space = get_world_2d().direct_space_state
	var LOS_obstacle = space.intersect_ray(global_position, Global.Player.global_position, [self], collision_mask)
	
	if not LOS_obstacle:
		return false
	
	var distance_to_player = Global.Player.global_position.distance_to(global_position)
	var Player_in_range = distance_to_player < MAX_DETECTION_RANGE
	
	if LOS_obstacle.collider == Global.Player and Player_in_range:
		return true
	else:
		return false


func NightVision_mode():
	$Torch.enabled = false

func DarkVision_mode():
	$Torch.enabled = true