import { describe, expect, test } from "bun:test";
import {
  GuestCommentValidationError,
  normalizeGuestDisplayName,
  validateGuestCommentEmail,
  validateGuestCommentBody,
} from "./post-comment-guest";

describe("normalizeGuestDisplayName", () => {
  test("trims and accepts valid name", () => {
    expect(normalizeGuestDisplayName("  ada  ")).toBe("ada");
  });

  test("rejects empty", () => {
    expect(() => normalizeGuestDisplayName("   ")).toThrow(GuestCommentValidationError);
  });

  test("rejects too long", () => {
    expect(() => normalizeGuestDisplayName("a".repeat(33))).toThrow(GuestCommentValidationError);
  });
});

describe("validateGuestCommentBody", () => {
  test("accepts plain text", () => {
    expect(validateGuestCommentBody("你好，世界")).toBe("你好，世界");
  });

  test("rejects http URL", () => {
    expect(() => validateGuestCommentBody("see http://x.com")).toThrow(GuestCommentValidationError);
  });

  test("rejects markdown link", () => {
    expect(() => validateGuestCommentBody("[a](http://b)")).toThrow(GuestCommentValidationError);
  });

  test("rejects too long", () => {
    expect(() => validateGuestCommentBody("z".repeat(501))).toThrow(GuestCommentValidationError);
  });
});

describe("validateGuestCommentEmail", () => {
  test("accepts empty email when anonymous", () => {
    expect(validateGuestCommentEmail("", true)).toBeNull();
  });

  test("requires email when not anonymous", () => {
    expect(() => validateGuestCommentEmail("", false)).toThrow(GuestCommentValidationError);
  });

  test("rejects invalid email when not anonymous", () => {
    expect(() => validateGuestCommentEmail("invalid-email", false)).toThrow(GuestCommentValidationError);
  });

  test("accepts valid email when not anonymous", () => {
    expect(validateGuestCommentEmail("  guest@example.com  ", false)).toBe("guest@example.com");
  });
});