/**
 * @file sessionChange.test.ts
 * @description Unit tests for `sessionChangeMatcher`: fires on a new session
 * and on a change of the keyed columns, never on a re-broadcast that moved none.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, expect, it } from "vitest";
import { sessionChangeMatcher } from "../sessionChange";
import type { WSMessage } from "../types";

const msg = (type: string, data: unknown) => ({ type, data, timestamp: "" }) as WSMessage;

describe("sessionChangeMatcher", () => {
  it("fires on a new session and on a state change, not on a same-state re-broadcast", () => {
    const m = sessionChangeMatcher();
    expect(m(msg("session_created", { id: "a", status: "active" }))).toBe(true);
    expect(m(msg("session_updated", { id: "a", status: "active", name: "x" }))).toBe(false);
    expect(
      m(msg("session_updated", { id: "a", status: "active", awaiting_input_since: "t" }))
    ).toBe(true);
    expect(m(msg("session_updated", { id: "a", status: "completed" }))).toBe(true);
    expect(m(msg("session_updated", { id: "a", status: "completed", archived_at: "t" }))).toBe(
      true
    );
  });

  it("takes an unseen or unkeyable session as a change, and ignores other types", () => {
    const m = sessionChangeMatcher();
    expect(m(msg("session_updated", { id: "b", status: "active" }))).toBe(true);
    expect(m(msg("session_updated", null))).toBe(true);
    expect(m(msg("new_event", { session_id: "b" }))).toBe(false);
  });
});