import { describe, expect, it } from "vitest";

import { parseICalendarBytes } from "@/worker/caldav/ical/parse";
import { parseVCardBytes } from "@/worker/carddav/vcard";
import { utf8ArrayBuffer } from "@tests/worker/helpers/bytes";
import { extractDeadPropertyFragment } from "@/worker/xml/dead-props";
import { parseSafeXml } from "@/worker/xml/parser";

describe("parser compatibility checks", () => {
  it("preserves namespace URI and local name for dead property fragments", () => {
    const fragment = extractDeadPropertyFragment('<x:favorite xmlns:x="urn:example:test">blue</x:favorite>');
    expect(fragment).toEqual({
      nsUri: "urn:example:test",
      localName: "favorite",
      xmlValue: '<x:favorite xmlns:x="urn:example:test">blue</x:favorite>',
    });
  });

  it("rejects unsafe entity declarations", () => {
    expect(() => parseSafeXml("<!DOCTYPE x [<!ENTITY y 'z'>]><x>&y;</x>")).toThrow(
      "Unsafe XML entity declarations are not accepted",
    );
  });

  it("rejects structurally hostile XML below the byte limit", () => {
    const deep = `${"<x>".repeat(129)}${"</x>".repeat(129)}`;
    expect(() => parseSafeXml(deep)).toThrow();

    const many = `<root>${"<x/>".repeat(50_001)}</root>`;
    expect(() => parseSafeXml(many, 1_000_000)).toThrow("element count limit");
  });

  it("imports bounded calendar and contact parsers in the Worker runtime", () => {
    const calendar = [
      "BEGIN:VCALENDAR",
      "VERSION:2.0",
      "PRODID:-//dab//parser-check//EN",
      "BEGIN:VEVENT",
      "UID:calendar-parser-check",
      "DTSTAMP:20260521T000000Z",
      "DTSTART:20260521T000000Z",
      "END:VEVENT",
      "END:VCALENDAR",
    ].join("\r\n");
    const contact = ["BEGIN:VCARD", "VERSION:4.0", "UID:contact-parser-check", "FN:Parser Check", "END:VCARD"].join(
      "\r\n",
    );

    expect(parseICalendarBytes(utf8ArrayBuffer(calendar), 4096, { maxYears: 1, maxInstances: 10 }).uid).toBe(
      "calendar-parser-check",
    );
    expect(parseVCardBytes(utf8ArrayBuffer(contact), 4096).uid).toBe("contact-parser-check");
  });
});