extension Duration {
    struct MatchFormatStyle: DiscreteFormatStyle, Sendable {

        let periodLength: Int
        let overtime: Int

        func format(_ value: Duration) -> String {
            let current: Int = ((periodLength + overtime) * 60 + Int(value.components.seconds)) / 60
            if current > periodLength {
                return "\(periodLength)' (+\(current - periodLength))"
            } else {
                return "\(current)'"
            }
        }

        func discreteInput(before input: Duration) -> Duration? {
            let minutes: Int64 = input.components.seconds / 60
            let value: Duration = .seconds(minutes * 60 - 1)
            return value
        }

        func discreteInput(after input: Duration) -> Duration? {
            let minutes: Int64 = input.components.seconds / 60
            guard minutes != 0 else {
                return input.components.attoseconds < .zero ? .zero : .seconds(60)
            }
            let value: Duration = .seconds((minutes + 1) * 60)
            return value
        }
    }
}

extension FormatStyle where Self == Duration.MatchFormatStyle {

    static func matchTime(currentTime: Int, periodLength: Int) -> Duration.MatchFormatStyle {
        return Duration.MatchFormatStyle(periodLength: periodLength, overtime: max(currentTime - periodLength, .zero))
    }
}