function normalizeSplatLabel(label: string) {
  return String(label || "").trim().toLowerCase();
}

function parseResolutionScore(label: string) {
  const normalized = normalizeSplatLabel(label);
  if (!normalized) return 0;

  if (
    normalized.includes("full") ||
    normalized.includes("origin") ||
    normalized.includes("source") ||
    normalized.includes("max")
  ) {
    return Number.MAX_SAFE_INTEGER;
  }

  const match = normalized.match(/(\d+(?:\.\d+)?)\s*([km]?)/);
  if (!match) return 0;

  const value = Number(match[1]);
  if (!Number.isFinite(value)) return 0;

  const unit = match[2];
  if (unit === "m") return Math.round(value * 1_000_000);
  if (unit === "k") return Math.round(value * 1_000);
  return Math.round(value);
}

function compareSplatEntries(
  a: [string, string],
  b: [string, string]
) {
  const scoreDelta = parseResolutionScore(b[0]) - parseResolutionScore(a[0]);
  if (scoreDelta !== 0) return scoreDelta;
  return a[0].localeCompare(b[0], "en");
}

export function getSortedWorldLabsSplatEntries(
  spzUrls?: Record<string, string> | null
) {
  return Object.entries(spzUrls || {})
    .filter(
      (entry): entry is [string, string] =>
        Boolean(entry[0]) && typeof entry[1] === "string" && entry[1].trim().length > 0
    )
    .sort(compareSplatEntries);
}

export function pickBestWorldLabsSplatEntry(
  spzUrls?: Record<string, string> | null
) {
  return getSortedWorldLabsSplatEntries(spzUrls)[0] || null;
}

export function pickBestWorldLabsSplatUrl(
  spzUrls?: Record<string, string> | null
) {
  return pickBestWorldLabsSplatEntry(spzUrls)?.[1] || null;
}