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import { normalizeFilesPath, type NormalizedDavPath } from "@/worker/dav/paths";
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export type DestinationResult = { ok: true; path: NormalizedDavPath } | { ok: false; status: number; message: string };
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export function parseDestination(headerValue: string | null, requestUrl: URL): DestinationResult {
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  if (!headerValue) return { ok: false, status: 400, message: "Missing Destination header" };
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  let destinationUrl: URL;
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  try {
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    destinationUrl = headerValue.startsWith("/") ? new URL(headerValue, requestUrl) : new URL(headerValue);
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  } catch {
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    return { ok: false, status: 400, message: "Invalid Destination header" };
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  }
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  if (destinationUrl.host.toLowerCase() !== requestUrl.host.toLowerCase()) {
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    return { ok: false, status: 502, message: "Cross-host COPY and MOVE are not supported" };
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  }
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  const normalized = normalizeFilesPath(destinationUrl.pathname);
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  if (!normalized.ok) return normalized;
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  return { ok: true, path: normalized.path };
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}
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export function overwriteAllowed(headerValue: string | null): boolean | null {
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  if (headerValue === null || headerValue === "") return true;
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  const value = headerValue.toUpperCase();
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  if (value === "T") return true;
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  if (value === "F") return false;
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  return null;
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}