type OrganizationSelectorFields = {
  _id?: string;
  id?: string;
  name: string;
  slug: string;
};

export function normalizeOrganizationSelector(input: string | undefined | null) {
  const trimmed = input?.trim();
  if (!trimmed) return undefined;
  return trimmed.slice(0, 160);
}

function organizationId(organization: OrganizationSelectorFields) {
  return String(organization._id ?? organization.id ?? "");
}

export function organizationMatchesSelector(
  organization: OrganizationSelectorFields | null | undefined,
  selector: string | null | undefined,
) {
  const normalizedSelector =
    normalizeOrganizationSelector(selector)?.toLowerCase();
  if (!organization || !normalizedSelector) return false;
  return (
    organizationId(organization).toLowerCase() === normalizedSelector ||
    organization.slug.toLowerCase() === normalizedSelector ||
    organization.name.trim().toLowerCase() === normalizedSelector
  );
}

export function resolveOrganizationBySelector<
  T extends OrganizationSelectorFields,
>(organizations: T[], selector: string | null | undefined): T | null {
  const normalizedSelector =
    normalizeOrganizationSelector(selector)?.toLowerCase();
  if (!normalizedSelector) return null;

  const slugMatch = organizations.find(
    (organization) =>
      organization.slug.toLowerCase() === normalizedSelector,
  );
  if (slugMatch) return slugMatch;

  const idMatch = organizations.find(
    (organization) =>
      organizationId(organization).toLowerCase() === normalizedSelector,
  );
  if (idMatch) return idMatch;

  const nameMatches = organizations.filter(
    (organization) =>
      organization.name.trim().toLowerCase() === normalizedSelector,
  );
  if (nameMatches.length === 1) return nameMatches[0];

  return null;
}