import { describe, expect, it } from "vitest";
import { parseMentions } from "./mentions.js";

const U1 = "user-abcdefgh1234";
const U2 = "user-ijklmnop5678";
const T1 = "team-eng-abcdefgh";
const P1 = "page-pqrs-uvwxyz";
const D1 = "db-abcdef0123456789";

describe("parseMentions (TASK-0094 R3/R4)", () => {
  it("parses one token per kind", () => {
    const r = parseMentions(`hello @user:${U1} and @team:${T1} see @page:${P1} + @database:${D1}`);
    expect(r).toEqual({ users: [U1], teams: [T1], pages: [P1], databases: [D1] });
  });

  it("dedupes per kind (same token twice → once)", () => {
    const r = parseMentions(`@user:${U1} again @user:${U1} @user:${U2}`);
    expect(r.users).toEqual([U1, U2]);
  });

  it("does NOT match a plain @Name (no recognized prefix)", () => {
    const r = parseMentions("@Ana ship it @teamwork @database!");
    expect(r).toEqual({ users: [], teams: [], pages: [], databases: [] });
  });

  it("requires ids of at least 8 chars (uuid/cuid-shaped)", () => {
    const r = parseMentions("@user:short @team:abc");
    expect(r.users).toHaveLength(0);
    expect(r.teams).toHaveLength(0);
  });

  it("handles empty / no-mention bodies", () => {
    expect(parseMentions("")).toEqual({ users: [], teams: [], pages: [], databases: [] });
    expect(parseMentions("just text")).toEqual({ users: [], teams: [], pages: [], databases: [] });
  });

  it("keeps first-seen order", () => {
    const r = parseMentions(`@user:${U2} @user:${U1}`);
    expect(r.users).toEqual([U2, U1]);
  });
});