import type { AetherShipKind } from "../game/aetherAssault";

export const AETHER_STANDARD_SHIP_COLORS = [
  "#20c8e8",
  "#8a5cff",
  "#f044b5",
  "#31cf74",
  "#f06b3c",
  "#d6b91c",
] as const;

export const AETHER_ARMORED_SHIP_COLORS = [
  "#9ef5ff",
  "#d0b8ff",
  "#ff9bdc",
  "#9af0b8",
  "#ffb088",
  "#ffe976",
] as const;

export function aetherShipColorIndex(seed: number, wave: number, shipIndex: number) {
  const normalizedSeed = Math.floor(Number.isFinite(seed) ? seed : 0) >>> 0;
  const mixedSeed = (normalizedSeed ^ (normalizedSeed >>> 16)) >>> 0;
  const normalizedWave = Math.max(1, Math.floor(Number.isFinite(wave) ? wave : 1));
  const normalizedIndex = Math.max(0, Math.floor(Number.isFinite(shipIndex) ? shipIndex : 0));
  return (mixedSeed + (normalizedWave - 1) * 3 + normalizedIndex * 5) % AETHER_STANDARD_SHIP_COLORS.length;
}

export function aetherShipColor(seed: number, wave: number, shipIndex: number, kind: AetherShipKind) {
  const palette = kind === "armored" ? AETHER_ARMORED_SHIP_COLORS : AETHER_STANDARD_SHIP_COLORS;
  return palette[aetherShipColorIndex(seed, wave, shipIndex)];
}