@tool
class_name StackedSpawnPattern
extends BulletSpawnPattern
## Spawns a pattern in a "stack". The pattern will be spawned multiple
## times at once with a varying [code]bullet_speed[/code].


## The subpattern to stack.
@export var pattern: BulletSpawnPattern
## The number of times to "stack" up the pattern.
@export_range(1, 1, 1, "or_greater") var stack_count: int = 1
## The minimum speed of the stacked patterns.
@export var min_speed: float:
	set(value):
		if min_speed != value:
			min_speed = value
			max_speed = maxf(min_speed, max_speed)
## The maximum speed of the stacked patterns.
@export var max_speed: float:
	set(value):
		if max_speed != value:
			max_speed = value
			min_speed = minf(min_speed, max_speed)


func _spawn_bullets(bullet_set: BulletSet, preset: BulletPreset) -> void:
	for i in stack_count:
		pattern.set(
			&"bullet_speed",
			remap(float(i), 0.0, float(stack_count - 1), min_speed, max_speed)
		)
		pattern.spawn_bullets(bullet_set, preset)