// Archive for ended Test Bench sessions. Persisted to the browser's
// localStorage — this is single-browser, client-side retention, not a
// shared server database. A "session" is every run since the last time
// the user pressed End Session; nothing is written until that deliberate
// action, so the record reflects a documented decision, not a side effect
// of each individual run.

export type ArchiveStatus = "done" | "blocked" | "expired";

export type ArchiveEntry = {
  id: string;
  timestamp: number;
  pipelineName: string;
  targetLabel: string;
  status: ArchiveStatus;
  checksum: string;
  byteSize: number;
  loc: number;
  nodeCount: number;
  runsInSession: number;
  performanceSummary: string;
  log: string[];
};

const STORAGE_KEY = "layer.testbench.archive";
const MAX_ENTRIES = 200;

export function loadArchive(): ArchiveEntry[] {
  if (typeof window === "undefined") return [];
  try {
    const raw = window.localStorage.getItem(STORAGE_KEY);
    if (!raw) return [];
    const parsed = JSON.parse(raw);
    return Array.isArray(parsed) ? (parsed as ArchiveEntry[]) : [];
  } catch {
    return [];
  }
}

export function saveArchiveEntry(entry: ArchiveEntry): void {
  if (typeof window === "undefined") return;
  const next = [entry, ...loadArchive()].slice(0, MAX_ENTRIES);
  try {
    window.localStorage.setItem(STORAGE_KEY, JSON.stringify(next));
  } catch {
    // Storage full or unavailable — the run itself already succeeded, so
    // fail the archive write silently rather than blocking the user.
  }
}