package com.evsuite.abrp;

/**
 * How many of a row of things a value lights: flags, candles, petals, embers, bats. An unread
 * value lights none, never a made-up amount. Android-free and unit-tested.
 */
final class Tally {

    private Tally() {}

    /** One thing per {@code step} of the value, rounded, from 0 to {@code max}; null or NaN is 0. */
    static int lit(Float value, float step, int max) {
        if (value == null || value.isNaN() || step <= 0f || value <= 0f) return 0;
        return Math.min(max, Math.round(value / step));
    }

    /**
     * Of {@code count} things round a gauge, how many the power lights: all of them at
     * {@code fullDraw} kW drawn, or at {@code fullRegen} kW regenerated (negative power).
     * Any real power lights at least one, so the gauge never looks idle while it is not.
     */
    static int ofPower(Float kw, float fullDraw, float fullRegen, int count) {
        if (kw == null || kw.isNaN() || Math.abs(kw) < 0.1f) return 0;
        float share = Math.abs(kw) / (kw < 0f ? fullRegen : fullDraw);
        return Math.max(1, Math.min(count, Math.round(share * count)));
    }
}