extends State
class_name CharacterState	

@export var character: CharacterBody3D
@export var move_speed: float = 3
@export var body_turn_speed: float = 3
@export var head_turn_speed: float = 6.0
@export var can_see: bool = true # indicates whether the character is able to see things in the state
@export var poi_investigate: bool = false
@export var poi_change_to_search: bool = false
@export var poi_update_waypoint_immediately: bool = false

var move_target
var look_target

func character_has_target():
	if character.player_last_seen != null:
		return true
	if character.point_of_interest != null:
		return true
	return false

func update_move_target():
	if character.player_last_seen != null:
		return character.player_last_seen
	elif character.point_of_interest != null:
		return character.point_of_interest["point"]
	else:
		return character.global_position

func search_on_lost_target():
	if !character.is_player_visible():
		Transitioned.emit(self, "attack")

func move_target_adj(position):
	return Vector3(position.x, character.global_position.y, position.z)

func rotate_to_face2D(object, target, target_offset_angle, delta, turn_speed):
	#to allow both nodes and positions to be passed to this function, test the target and use Vector3 coords
	var target_transformed
	if target == null:
		target_transformed = object.global_position
	elif target is Vector3:
		target_transformed = target
	elif target is Node3D:
		target_transformed = target.global_position
	
	var pos2d = Vector2(object.global_position.x, object.global_position.z)
	var target_pos2d = Vector2(target_transformed.x, target_transformed.z)
	var direction = (pos2d - target_pos2d)
	return lerp_angle(object.global_rotation.y, atan2(direction.x, direction.y) + deg_to_rad(target_offset_angle), delta * turn_speed)

func rotate_to_face3D(object: Node3D, target, target_offset_angle: Vector3, delta: float, turn_speed: float):
	if target == null:
		return
	
	var target_positon
	
	if target is Vector3:
		target_positon = target
	else:
		target_positon = target.global_position
	
	var desired_rotation = object.global_transform.looking_at(target_positon, Vector3.UP).basis.get_euler()
	var current_rotation = object.global_rotation
	
	#Interpolate each axis
	current_rotation.x = lerp_angle(current_rotation.x, desired_rotation.x + target_offset_angle.x, delta * turn_speed)
	current_rotation.y = lerp_angle(current_rotation.y, desired_rotation.y + target_offset_angle.y, delta * turn_speed)
	current_rotation.z = lerp_angle(current_rotation.z, desired_rotation.z + target_offset_angle.z, delta * turn_speed)
	
	#clamp pitch
	var max_downward_pitch = deg_to_rad(85)
	var min_upward_pitch = deg_to_rad(-45)
	current_rotation.x = clamp(current_rotation.x, min_upward_pitch, max_downward_pitch)
	
	object.global_rotation = current_rotation

func move_to_nav_point(delta):
	var destination = character.nav_agent.get_next_path_position()
	var local_destination = destination - character.global_position
	var new_velocity = local_destination.normalized() * move_speed
	
	character.nav_agent.set_velocity(new_velocity)
	character.global_rotation.y = rotate_to_face2D(character, destination, 0, delta, body_turn_speed)

func velocity_computed(safe_velocity):
	character.velocity = character.velocity.move_toward(safe_velocity, .25)

func update_minimap(priority, duration, color):
	SignalBus.emit_signal("ui_minimap_point", character, character.global_position, 1, duration, color)