extends BTPlayer

class_name EnemyAI

const ROAM_DISTANCE: float = 10.0
const DISTANCE_TO_PLAYER: float = 10.0

@export var character: CharacterBody3D

@export_category("Sprite")
@export var sprite:Sprite3D;
@export var idleTexture: Texture2D;
@export var aggressiveTexture: Texture2D;

@export_category("Agents")
@export var agent: NavigationAgent3D;

@export var animationTree: AnimationTree;

@export_category("Firing")
@export var MuzzleFlash: PackedScene
@export var Origin: Node3D

var aggressive = false

func _physics_process(_delta: float) -> void:
	self.blackboard.set_var('PlayerDistance', character.global_position.distance_to(Player.Instance.global_position))
	self.blackboard.set_var('LookingAngleToPlayer', (-character.global_basis.z).dot((character.global_position - Player.Instance.global_position).normalized()))

func setAggressive(value: bool) -> void:
	if not aggressive && value:
		agent.target_position = character.global_position;

	sprite.texture = aggressiveTexture if value else idleTexture
	aggressive = value


func roam() -> void:
	var targetPosition = character.global_position + (Vector3(randf_range(-1, 1), randf_range(-1, 1), randf_range(-1,1)).normalized() * randf_range(0, ROAM_DISTANCE))
	agent.target_position = targetPosition

func moveToPlayer() -> void:
	var toPlayerDirection = Player.Instance.global_position - character.global_position
	agent.target_position = Player.Instance.global_position + toPlayerDirection.normalized() * -DISTANCE_TO_PLAYER

func Fire() -> void:
	self.animationTree['parameters/playback'].travel('Fire')
	var instance = MuzzleFlash.instantiate(PackedScene.GEN_EDIT_STATE_INSTANCE)
	Origin.add_child(instance)