class_name EnemyMod
extends Resource

enum ModType { ADDITIVE, MULTIPLICATIVE, ABSOLUTE, BOOL }

@export var mod_property: String
@export var mod_value: float
@export var mod_value_bool: bool = false
@export var mod_type: ModType = ModType.MULTIPLICATIVE

func get_calculated(enemy: EnemyBase, key: String) -> Variant:
	assert(enemy.has_property(key), "tried to calculate property '%s' where base value does not exist on %s" % [key, enemy])
	var base_value = enemy.get(key)
	var add = 0.0
	var mul = 1.0
	for mod in enemy.modifiers:
		if mod.mod_property == key:
			match mod.mod_type:
				ModType.ADDITIVE:
						add += mod.mod_value
				ModType.MULTIPLICATIVE:
						mul *= mod.mod_value
				ModType.ABSOLUTE:
						return mod.mod_value
				ModType.BOOL:
						return mod.mod_value_bool
	return (base_value + add) * mul