import { validateEmail, validatePassword, validateUsername } from "../validation";

describe("validateEmail", () => {
  it.each(["a@b.co", "user.name+tag@example.com", "x@host.dev"])("accepts %s", (e) => {
    expect(validateEmail(e)).toBe(true);
  });

  it.each(["", "no-at", "a@b", "a@b.c", "a@@b.co", " a@b.co", "a@b.co "])("rejects %s", (e) => {
    expect(validateEmail(e)).toBe(false);
  });
});

describe("validatePassword", () => {
  it("accepts a strong password", () => {
    const r = validatePassword("Aa1!2345");
    expect(r.valid).toBe(true);
    expect(r.errors).toEqual([]);
  });

  it("collects every rule violation in a single pass", () => {
    const r = validatePassword("short");
    expect(r.valid).toBe(false);
    // length, upper, digit, symbol = 4 misses; lowercase is present.
    expect(r.errors.length).toBe(4);
  });

  it("flags missing symbol only", () => {
    const r = validatePassword("Aaaaaaa1");
    expect(r.valid).toBe(false);
    expect(r.errors).toHaveLength(1);
    expect(r.errors[0]).toMatch(/special/i);
  });
});

describe("validateUsername", () => {
  it("accepts 3..30 ascii alnum/underscore", () => {
    expect(validateUsername("abc")).toEqual({ valid: true });
    expect(validateUsername("a_1")).toEqual({ valid: true });
    expect(validateUsername("a".repeat(30))).toEqual({ valid: true });
  });

  it("rejects out-of-range length", () => {
    expect(validateUsername("ab").valid).toBe(false);
    expect(validateUsername("a".repeat(31)).valid).toBe(false);
  });

  it("rejects non-ascii / special chars", () => {
    expect(validateUsername("ab-c").valid).toBe(false);
    expect(validateUsername("ab c").valid).toBe(false);
    expect(validateUsername("ab.c").valid).toBe(false);
  });
});