package com.projectsacrifice.game;

import java.util.Arrays;

/** Small deterministic variant chooser with independent no-repeat history per cue. */
public final class AudioCueSequencer {
    private final int[] previous = new int[AudioCue.values().length];
    private long state;

    public AudioCueSequencer(long seed) {
        Arrays.fill(previous, -1);
        state = seed == 0L ? 0x6d2b79f5L : seed;
    }

    public int nextVariant(AudioCue cue) {
        if (cue == null || cue.variants() <= 1) return 0;
        state = state * 6364136223846793005L + 1442695040888963407L;
        int candidate = (int) Math.floorMod(state >>> 24, cue.variants());
        int index = cue.ordinal();
        if (candidate == previous[index]) candidate = (candidate + 1) % cue.variants();
        previous[index] = candidate;
        return candidate;
    }
}