package com.evsuite.abrp;

import java.util.Locale;

/**
 * The unit tyre pressures are shown in. The car reports kPa; this only changes the display.
 * Android-free, unit-tested.
 */
enum PressureUnit {
    BAR("bar", "%.1f bar", 0.01),
    KPA("kPa", "%.0f kPa", 1.0),
    PSI("psi", "%.1f psi", 0.145038);

    static final String PREF_KEY = "tire_pressure_unit";
    static final PressureUnit DEFAULT = BAR;

    final String label;
    private final String pattern;
    private final double perKpa;

    PressureUnit(String label, String pattern, double perKpa) {
        this.label = label;
        this.pattern = pattern;
        this.perKpa = perKpa;
    }

    /** A reading in this unit, or a dash for none. */
    String format(Float kpa) {
        if (kpa == null || kpa.isNaN() || kpa.isInfinite()) return "—";
        return String.format(Locale.US, pattern, kpa * perKpa);
    }

    /** The stored choice; anything unknown falls back to bar. */
    static PressureUnit fromPref(String name) {
        for (PressureUnit u : values()) {
            if (u.name().equals(name)) return u;
        }
        return DEFAULT;
    }
}