lighttroupe/luz

require 'user_object_setting'

class UserObjectSettingTimespan < UserObjectSetting
    attr_accessor :time_number, :time_unit

    def to_yaml_properties
        super + ['@time_number', '@time_unit']
    end

    def after_load
        @time_number ||= (@options[:default] ? @options[:default][0] : (4))
        @time_unit ||= (@options[:default] ? @options[:default][1] : (:seconds))
    end

    #
    # ...
    #
    def instant?
        @time_number == 0
    end

    def to_seconds
        unit_and_number_to_time(@time_unit, @time_number)
    end

    def progress_since(time, beat=nil)
        return 1.0 if instant?

        if @time_unit == :beats
            return 0.0 if beat.nil?
            elapsed = $env[:beat] - beat
            (elapsed / @time_number).clamp(0.0, 1.0)
        else
            return 0.0 if time.nil?
            elapsed = $env[:time] - time
            elapsed = elapsed.abs        # NOTE: progress backwards in time works just as well
            (elapsed / self.to_seconds).clamp(0.0, 1.0)
        end
    end

    def delta
        return 1.0 if @time_number == 0.0

        if @time_unit == :beats
            $env[:beat_delta] / @time_number
        else
            $env[:time_delta] / @time_number
        end
    end

    def summary
        summary_format("#{@time_number} #{TIME_UNIT_SHORT[@time_unit]}")
    end
end