/**
 * DC-167: default-namespace multistatus parsing (Radicale compatibility).
 * Judge-lesson class: the parser required a namespace prefix on <response>,
 * which Radicale (default DAV ns, bare <response>) never emits — result was
 * a silent zero events, ok:true. Real-server XML style is now covered.
 */
'use strict';

const { extractCalendarsAndEvents } = require('../../src/calendar/caldav-client');

const BARE = '<?xml version="1.0"?><multistatus xmlns="DAV:" xmlns:d="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">' +
  '<response><href>/sami7777/calendar/a.ics</href><propstat><prop>' +
  '<getetag>"aa"</getetag>' +
  '<calendar-data xmlns:C="urn:ietf:params:xml:ns:caldav">BEGIN:VCALENDAR&#13;&#10;END:VCALENDAR</calendar-data>' +
  '</prop></propstat></response>' +
  '<response><href>/sami7777/calendar/b.ics</href><propstat><prop>' +
  '<getetag>"bb"</getetag>' +
  '<calendar-data>BEGIN:VCALENDAR</calendar-data>' +
  '</prop></propstat></response></multistatus>';

const PREFIXED = BARE
  .replace(/<response>/g, '<d:response>')
  .replace(/<\/response>/g, '</d:response>')
  .replace('<calendar-data', '<d:calendar-data')
  .replace('</calendar-data>', '</d:calendar-data>');

describe('DC-167 default-namespace multistatus (Radicale)', () => {
  test('bare <response> entries are extracted (Radicale style)', () => {
    const out = extractCalendarsAndEvents(BARE);
    expect(out).toHaveLength(2);
    expect(out[0].href).toBe('/sami7777/calendar/a.ics');
    expect(out[0].calendarData).toContain('BEGIN:VCALENDAR');
    expect(out[1].href).toBe('/sami7777/calendar/b.ics');
  });

  test('prefixed <d:response> entries still extract (back-compat)', () => {
    const out = extractCalendarsAndEvents(PREFIXED);
    expect(out).toHaveLength(2);
    expect(out[0].href).toBe('/sami7777/calendar/a.ics');
    expect(out[0].calendarData).toContain('BEGIN:VCALENDAR');
    expect(out[1].href).toBe('/sami7777/calendar/b.ics');
    expect(out[1].calendarData).toContain('BEGIN:VCALENDAR');
  });

  test('mixed styles in one document: two well-formed entries, no drop/dup', () => {
    // Valid XML: first response bare-style, second prefixed-style.
    const mixed = '<?xml version="1.0"?><multistatus xmlns="DAV:" xmlns:d="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">' +
      '<response><href>/sami7777/calendar/a.ics</href><propstat><prop>' +
      '<getetag>"aa"</getetag>' +
      '<calendar-data>BEGIN:VCALENDAR</calendar-data>' +
      '</prop></propstat></response>' +
      '<d:response><d:href>/sami7777/calendar/b.ics</d:href><d:propstat><d:prop>' +
      '<d:getetag>"bb"</d:getetag>' +
      '<calendar-data>BEGIN:VCALENDAR</calendar-data>' +
      '</d:prop></d:propstat></d:response></multistatus>';
    const out = extractCalendarsAndEvents(mixed);
    expect(out).toHaveLength(2);
    expect(out.map(e => e.href)).toEqual(['/sami7777/calendar/a.ics', '/sami7777/calendar/b.ics']);
  });

  test('empty multistatus yields zero entries (no throw)', () => {
    const out = extractCalendarsAndEvents("<?xml version='1.0'?><multistatus xmlns='DAV:' />");
    expect(out).toEqual([]);
  });
});

describe('DC-167 fixture validity (namespace-aware parse, mandatory)', () => {
  // fail-closed: if the parser is unavailable the suite FAILS (no skip),
  // because fixture validity is part of this change's acceptance criteria.
  let XMLParser;
  beforeAll(() => {
    ({ XMLParser } = require('fast-xml-parser'));
    expect(typeof XMLParser).toBe('function');
  });

  test('all fixtures are well-formed, namespace-aware parseable', () => {
    const parser = new XMLParser({ preserveOrder: true, removeNSPrefix: false, ignoreAttributes: false });
    const mixed = '<?xml version="1.0"?><multistatus xmlns="DAV:" xmlns:d="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">' +
      '<response><href>/sami7777/calendar/a.ics</href><propstat><prop>' +
      '<getetag>"aa"</getetag><calendar-data>BEGIN:VCALENDAR</calendar-data>' +
      '</prop></propstat></response>' +
      '<d:response><d:href>/sami7777/calendar/b.ics</d:href><d:propstat><d:prop>' +
      '<d:getetag>"bb"</d:getetag><calendar-data>BEGIN:VCALENDAR</calendar-data>' +
      '</d:prop></d:propstat></d:response></multistatus>';
    for (const [name, xml] of [['BARE', BARE], ['PREFIXED', PREFIXED], ['MIXED', mixed]]) {
      const doc = parser.parse(xml);
      expect(Array.isArray(doc)).toBe(true);
      const ms = doc.find(n => 'multistatus' in n);
      expect(ms).toBeDefined();
      const texts = JSON.stringify(ms);
      expect(texts).toContain('a.ics');
      expect(texts).toContain('b.ics');
    }
  });
});