import { json, readJsonBody, requireAdmin } from "../../../_lib/auth";
import { syncAll } from "../../../_lib/photos";
import { listHistory, readHistorySnapshot, saveSettings } from "../../../_lib/store";

export const dynamic = "force-dynamic";

export async function GET(request: Request) {
  const denied = await requireAdmin(request);
  if (denied) return denied;
  return json({ history: await listHistory() });
}

/** Reverts calendars and photo settings to a snapshot. The current state is itself snapshotted first, so a revert can be undone. */
export async function POST(request: Request) {
  const denied = await requireAdmin(request, { mutating: true });
  if (denied) return denied;
  const body = await readJsonBody<{ id?: string }>(request);
  const snapshot = body?.id ? await readHistorySnapshot(body.id) : null;
  if (!snapshot) return json({ error: "That version no longer exists." }, 404);
  const saved = await saveSettings({ calendars: snapshot.calendars, photos: snapshot.photos }, `Reverted to version from ${snapshot.updatedAt}`);
  console.log(`[admin] settings reverted to ${body?.id}`);
  void syncAll(); // re-fetch any album the restored version brings back
  return json({ ok: true, updatedAt: saved.updatedAt });
}