extends Entity
class_name Enemy

@onready var sprite_2d: Sprite2D = $Sprite2D
@onready var nav_agent: NavigationAgent2D = $NavigationAgent2D

var vision: int = 100
var at_rocket := false

func _physics_process(delta: float) -> void:
	if not at_rocket:
		random_movement()
	
func random_movement():
	if nav_agent.is_navigation_finished():
		call_deferred("new_target_point")
		return

	var current_agent_position: Vector2 = global_position
	var next_path_position: Vector2 = nav_agent.get_next_path_position()

	velocity = current_agent_position.direction_to(next_path_position) * speed
	move_and_slide()
	for i in range(get_slide_collision_count()):
		var collision := get_slide_collision(i)
		if collision.get_collider() is Chest:
			var buff: Buff = collision.get_collider().open(self)
			if buff:
				match(buff.color):
					buff.colors.RED:
						lives += 1
						color.r -= 0.25
					buff.colors.GREEN:
						vision += 25
						color.g -= 0.25
					buff.colors.BLUE:
						speed += 12
						color.b -= 0.25
				sprite_2d.modulate = color

func new_target_point():
	# Wait for the first physics frame so the NavigationServer can sync.
	await get_tree().physics_frame

	var target_point := Vector2.from_angle(randf_range(0.0, TAU)) * vision
	var map := get_world_2d().navigation_map
	var closest_point := NavigationServer2D.map_get_closest_point(map, global_position + target_point)
	var point_delta := closest_point - target_point
	var is_on_map = point_delta.is_zero_approx()  # Answer to original question!
	#if not is_on_map:
		## Wasn't on the map, so push in from edge. If you have thin sections on
		## your navmesh, this could push it back off the navmesh!
		#point_delta = point_delta.normalized()
		#closest_point += point_delta * 32
	nav_agent.target_position = closest_point

func reach_rocket():
	at_rocket = true