import { describe, expect, it } from "vitest";
import { decodeEmailPayload, displayEmail, encodeEmailPayload, normalizeContactEmail, protectEmail } from "./contact-email";

describe("normalizeContactEmail", () => {
  it.each([
    ["info@wabenhain.com", "info@wabenhain.com"],
    ["  info@wabenhain.com ", "info@wabenhain.com"],
    ["info [á] wabenhain.com", "info@wabenhain.com"],
    ["info [at] wabenhain.com", "info@wabenhain.com"],
    ["info(at)wabenhain(dot)com", "info@wabenhain.com"],
    ["info {ät} wabenhain [punkt] com", "info@wabenhain.com"],
    ["info [AT] wabenhain [DOT] com", "info@wabenhain.com"],
    ["hallo<@>wabenhain.com", "hallo@wabenhain.com"],
  ])("turns %j into a usable address", (input, expected) => {
    expect(normalizeContactEmail(input)).toBe(expected);
  });

  it.each(["", "hallo", "info [á] ", "info @ wabenhain", "a@b@c.de", "info [á] wabenhain.com <script>"])("rejects %j", (input) => {
    expect(normalizeContactEmail(input)).toBeNull();
  });
});

describe("displayEmail", () => {
  it("shows a readable, not directly harvestable form", () => {
    expect(displayEmail("info@wabenhain.com")).toBe("info [at] wabenhain.com");
  });
});

describe("email payload", () => {
  it("round-trips and never contains the address in clear text", () => {
    const payload = encodeEmailPayload("info@wabenhain.com", new Uint8Array([7, 42, 199, 3]));
    expect(payload).not.toContain("@");
    expect(payload).not.toContain("wabenhain");
    expect(payload).not.toContain("info");
    expect(decodeEmailPayload(payload)).toBe("info@wabenhain.com");
  });

  it("supports non-ASCII addresses", () => {
    const payload = encodeEmailPayload("jürgen@bienen.de", new Uint8Array([1, 2, 3]));
    expect(decodeEmailPayload(payload)).toBe("jürgen@bienen.de");
  });

  it("returns null for damaged payloads", () => {
    expect(decodeEmailPayload("kaputt")).toBeNull();
    expect(decodeEmailPayload("0102.zz")).toBeNull();
    expect(decodeEmailPayload("")).toBeNull();
  });

  it("uses a fresh key per call", () => {
    const a = protectEmail("info@wabenhain.com");
    const b = protectEmail("info@wabenhain.com");
    expect(a.payload).not.toBe(b.payload);
    expect(decodeEmailPayload(a.payload)).toBe("info@wabenhain.com");
    expect(a.fallback).toBe("info [at] wabenhain.com");
  });
});