use super::funejson::Value;
use super::money_currency_digits_data::CURRENCY_DIGITS;

/// Decimal places in a currency's minor unit, per ISO 4217.
///
/// Dividing by 100 is wrong for yen, won, dinar and a few dozen others, so
/// anything moving between minor and major units asks here.
///
/// # Panics
/// Panics if the code is not an active ISO 4217 currency with a minor unit.
pub fn currency_digits(currency: &str) -> i64 {
    match CURRENCY_DIGITS.iter().find(|c| c.code == currency) {
        Some(row) => row.digits,
        None => panic!("no ISO 4217 minor unit for currency \"{}\"", currency),
    }
}

pub fn fune_vector(args: &[Value]) -> Value {
    Value::Int(currency_digits(args[0].as_str()))
}