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;
}

function compareInlineSplatEntries(
  left: [string, string],
  right: [string, string]
) {
  // World Labs exposes multiple SPZ tiers; the canvas should show the highest
  // quality available first and keep lower tiers only as load fallbacks.
  return compareSplatEntries(left, right);
}

const KNOWN_ARCHIVED_ASSET_HOSTS = [
  "blob.vercel-storage.com",
  "s3.1080p.hk",
  "img.yydd.ai",
];

function isKnownArchivedAssetHost(hostname: string) {
  return KNOWN_ARCHIVED_ASSET_HOSTS.some(
    (host) => hostname === host || hostname.endsWith(`.${host}`)
  );
}

export function isLikelyWorldLabsTemporaryAssetUrl(value?: string | null) {
  const raw = String(value || "").trim();
  if (!raw) return false;
  if (raw.startsWith("/") || raw.startsWith("blob:") || raw.startsWith("data:")) {
    return false;
  }

  try {
    const parsed = new URL(raw);
    const hostname = parsed.hostname.toLowerCase();
    const pathname = parsed.pathname.toLowerCase();

    if (isKnownArchivedAssetHost(hostname)) {
      return false;
    }

    if (hostname.includes("worldlabs") || hostname.includes("marble")) {
      return true;
    }

    const likelyWorldAsset =
      pathname.includes("worldlabs") ||
      pathname.includes("marble") ||
      pathname.includes("spz") ||
      pathname.includes("splat") ||
      pathname.includes("mesh") ||
      pathname.endsWith(".glb") ||
      pathname.endsWith(".gltf");

    return (
      likelyWorldAsset &&
      (hostname.includes("googleapis.com") ||
        hostname.includes("googleusercontent.com") ||
        hostname.includes("cloudfront.net"))
    );
  } catch {
    return false;
  }
}

export function isArchivedWorldLabsAssetUrl(value?: string | null) {
  const raw = String(value || "").trim();
  return Boolean(raw) && !isLikelyWorldLabsTemporaryAssetUrl(raw);
}

export function getArchivedWorldLabsSplatEntries(
  spzUrls?: Record<string, string> | null
) {
  return getSortedWorldLabsSplatEntries(spzUrls).filter(([, url]) =>
    isArchivedWorldLabsAssetUrl(url)
  );
}

export function pickBestArchivedWorldLabsSplatUrl(
  spzUrls?: Record<string, string> | null
) {
  return getArchivedWorldLabsSplatEntries(spzUrls)[0]?.[1] || null;
}

export function pickPreferredInlineWorldLabsSplatEntry(
  spzUrls?: Record<string, string> | null
) {
  const archivedEntries = getArchivedWorldLabsSplatEntries(spzUrls);
  const sourceEntries =
    archivedEntries.length > 0
      ? archivedEntries
      : getSortedWorldLabsSplatEntries(spzUrls);
  return sourceEntries.slice().sort(compareInlineSplatEntries)[0] || null;
}

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

export function getPreferredInlineWorldLabsSplatUrls(
  spzUrls?: Record<string, string> | null
) {
  const archivedEntries = getArchivedWorldLabsSplatEntries(spzUrls);
  const sourceEntries =
    archivedEntries.length > 0
      ? archivedEntries
      : getSortedWorldLabsSplatEntries(spzUrls);
  const orderedEntries = sourceEntries.slice().sort(compareInlineSplatEntries);
  const seen = new Set<string>();

  return orderedEntries
    .map(([, url]) => url)
    .filter((url) => {
      const normalized = String(url || "").trim();
      if (!normalized || seen.has(normalized)) return false;
      seen.add(normalized);
      return true;
    });
}