@tool
extends MeshInstance3D

## Dessine un rectangle (contour) représentant une zone de confinement.
## À attacher sur un MeshInstance3D vide, placé n'importe où dans la scène.
## Utilise les mêmes valeurs (zone_center / zone_size) que FleeingAnimal.gd.

@export var zone_center: Vector3 = Vector3.ZERO:
	set(value):
		zone_center = value
		_update_rectangle()

@export var zone_size: Vector2 = Vector2(30.0, 30.0):  # largeur (x) et profondeur (z)
	set(value):
		zone_size = value
		_update_rectangle()

@export var zone_rotation_degrees: float = 0.0:  # rotation du rectangle autour de l'axe Y
	set(value):
		zone_rotation_degrees = value
		_update_rectangle()

@export var line_color: Color = Color(1.0, 0.2, 0.2):
	set(value):
		line_color = value
		_update_material()

@export var height_offset: float = 0.05  # légère élévation pour éviter le z-fighting avec le sol


func _ready() -> void:
	_update_rectangle()
	_update_material()


func _update_rectangle() -> void:
	var immediate := ImmediateMesh.new()
	immediate.surface_begin(Mesh.PRIMITIVE_LINE_STRIP)

	var half_width := zone_size.x * 0.5
	var half_depth := zone_size.y * 0.5
	var rot_rad := deg_to_rad(zone_rotation_degrees)

	var local_corners := [
		Vector3(-half_width, 0.0, -half_depth),
		Vector3(half_width, 0.0, -half_depth),
		Vector3(half_width, 0.0, half_depth),
		Vector3(-half_width, 0.0, half_depth),
		Vector3(-half_width, 0.0, -half_depth),
	]

	for corner in local_corners:
		var rotated_corner: Vector3 = corner.rotated(Vector3.UP, rot_rad)
		var final_point := zone_center + rotated_corner
		final_point.y += height_offset
		immediate.surface_add_vertex(final_point)

	immediate.surface_end()
	mesh = immediate


func _update_material() -> void:
	var mat := StandardMaterial3D.new()
	mat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
	mat.albedo_color = line_color
	mat.vertex_color_use_as_albedo = false
	material_override = mat