import { apiGet, apiPost } from "@/lib/api/client";
import { hasLiveSession } from "@/lib/api/mode";
import type { Phase3Activity } from "@/lib/phase3-learning";

/**
 * Backend persistence for the learning-support activity aggregate (PYQ result,
 * weak topics, revision saves, recovery actions). localStorage stays the
 * offline source of truth; this makes the data survive login / device change.
 * Best-effort, no-op when logged out.
 */

type Phase3ActivityRemote = { data: Phase3Activity; updated_at: string };

export async function savePhase3ActivityRemote(data: Phase3Activity): Promise<boolean> {
  if (!hasLiveSession()) return false;
  try {
    await apiPost<Phase3ActivityRemote, { data: Phase3Activity }>("/phase3-activity", { data });
    return true;
  } catch {
    return false;
  }
}

export async function getPhase3ActivityRemote(): Promise<Phase3Activity | null> {
  if (!hasLiveSession()) return null;
  try {
    const remote = await apiGet<Phase3ActivityRemote | null>(
      "/phase3-activity/me?optional=true",
    );
    return remote?.data ?? null;
  } catch {
    return null;
  }
}