extends Resource
class_name ItemStatModifier

@export var stat_key: String = ""
@export var value: float = 0.0
@export var affix: ItemAffixDefinition

# Fixed-value affixes and legacy modifiers have no roll quality to highlight.
func get_roll_quality(level: int) -> int:
	if affix == null:
		return 0
	var bounds := affix.get_value_range(level)
	if is_equal_approx(bounds.x, bounds.y):
		return 0
	var fraction := clampf((value - bounds.x) / (bounds.y - bounds.x), 0.0, 1.0)
	if fraction >= 0.9 - 0.000001:
		return 2
	return 1 if fraction >= 0.75 - 0.000001 else 0

func get_display_text() -> String:
	var label := affix.display_name if affix else ItemInstance.stat_name(stat_key)
	var suffix := affix.unit if affix else ("%" if stat_key.ends_with("_percent") else "/s")
	var displayed_value := value * ItemInstance.ENERGY_REGENERATION_BONUS_MULTIPLIER if stat_key == "energy_regeneration" else value
	return "%s: %s%.2f %s" % [label, "+" if displayed_value >= 0.0 else "", displayed_value, suffix]