class_name GoalRequirementData
extends Resource

@export var currency: Resource
@export var amount_mantissa: float = 0.0
@export var amount_exponent: int = 0

func get_currency_id() -> StringName:
	if currency == null:
		return &""

	return GameState.get_currency_id(currency)

func get_amount() -> BigNumber:
	return BigNumber.new(amount_mantissa, amount_exponent)

func has_valid_currency() -> bool:
	var currency_id: StringName = get_currency_id()
	if currency_id == &"":
		return false

	return GameState.is_known_currency_id(currency_id)

func has_valid_amount() -> bool:
	return get_amount().mantissa >= 0.0

func is_valid() -> bool:
	return has_valid_currency() and has_valid_amount()

func is_met() -> bool:
	if not is_valid():
		return false

	var total_amount: BigNumber = GameState.get_total_currency_acquired_by_id(get_currency_id())
	return not total_amount.is_less_than(get_amount())

func get_summary_text() -> String:
	if not is_valid():
		return ""

	var currency_name: String = GameState.get_currency_name(get_currency_id())
	return "%s %s" % [get_amount().to_string_suffix(2), currency_name]