import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";

import { describe, expect, it, vi } from "vitest";

import { saveSessionStore } from "../../config/sessions.js";
import { getSessionSnapshot } from "./session-snapshot.js";

describe("getSessionSnapshot", () => {
  it("uses heartbeat idle override while daily reset still applies", async () => {
    vi.useFakeTimers();
    vi.setSystemTime(new Date(2026, 0, 18, 5, 0, 0));
    try {
      const root = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-snapshot-"));
      const storePath = path.join(root, "sessions.json");
      const sessionKey = "agent:main:whatsapp:dm:S1";

      await saveSessionStore(storePath, {
        [sessionKey]: {
          sessionId: "snapshot-session",
          updatedAt: new Date(2026, 0, 18, 3, 30, 0).getTime(),
        },
      });

      const cfg = {
        session: {
          store: storePath,
          reset: { mode: "daily", atHour: 4, idleMinutes: 240 },
          heartbeatIdleMinutes: 30,
        },
      } as Parameters<typeof getSessionSnapshot>[0];

      const snapshot = getSessionSnapshot(cfg, "whatsapp:+15550001111", true, {
        sessionKey,
      });

      expect(snapshot.resetPolicy.idleMinutes).toBe(30);
      expect(snapshot.fresh).toBe(false);
      expect(snapshot.dailyResetAt).toBe(new Date(2026, 0, 18, 4, 0, 0).getTime());
    } finally {
      vi.useRealTimers();
    }
  });
});