import { describe, expect, test } from "bun:test";
import { formatRole, getUserInitials } from "./user.js";

describe("getUserInitials", () => {
  test("returns '??' for null", () => {
    expect(getUserInitials(null)).toBe("??");
  });

  test("returns '??' for undefined", () => {
    expect(getUserInitials(undefined)).toBe("??");
  });

  test("returns initials from display name with two words", () => {
    expect(
      getUserInitials({ displayName: "John Doe", email: "john@example.com" }),
    ).toBe("JD");
  });

  test("returns initials from display name with multiple words", () => {
    expect(
      getUserInitials({
        displayName: "John Michael Doe",
        email: "john@example.com",
      }),
    ).toBe("JD");
  });

  test("returns first two characters for single word display name", () => {
    expect(
      getUserInitials({ displayName: "John", email: "john@example.com" }),
    ).toBe("JO");
  });

  test("returns uppercase initials", () => {
    expect(
      getUserInitials({
        displayName: "john doe",
        email: "john@example.com",
      }),
    ).toBe("JD");
  });

  test("falls back to email when no display name", () => {
    expect(getUserInitials({ email: "john@example.com" })).toBe("JO");
  });

  test("handles null display name", () => {
    expect(
      getUserInitials({ displayName: null, email: "alice@example.com" }),
    ).toBe("AL");
  });

  test("handles empty display name", () => {
    expect(getUserInitials({ displayName: "", email: "bob@example.com" })).toBe(
      "BO",
    );
  });
});

describe("formatRole", () => {
  test("capitalizes 'admin'", () => {
    expect(formatRole("admin")).toBe("Admin");
  });

  test("capitalizes 'member'", () => {
    expect(formatRole("member")).toBe("Member");
  });

  test("capitalizes 'owner'", () => {
    expect(formatRole("owner")).toBe("Owner");
  });

  test("handles already capitalized roles", () => {
    expect(formatRole("Admin")).toBe("Admin");
  });

  test("handles single character", () => {
    expect(formatRole("a")).toBe("A");
  });

  test("handles empty string", () => {
    expect(formatRole("")).toBe("");
  });
});