import { localStorageNamespace } from "../constants";

function hashScope(scope: string): string {
  let hash = 2166136261;

  for (let index = 0; index < scope.length; index += 1) {
    hash ^= scope.charCodeAt(index);
    hash = Math.imul(hash, 16777619);
  }

  return (hash >>> 0).toString(36);
}

export function normalizeHistoryScope(scope?: string | null): string | null {
  const trimmed = scope?.trim();

  if (!trimmed) {
    return null;
  }

  return hashScope(trimmed);
}

export function getHistoryActiveSessionKey(scope: string): string {
  return `${localStorageNamespace}/history/${scope}/activeSessionId`;
}

export function getHistoryConversationsKey(scope: string): string {
  return `${localStorageNamespace}/history/${scope}/conversations`;
}