import test from 'node:test';
import assert from 'node:assert/strict';
import fs from 'node:fs/promises';
import vm from 'node:vm';
import { loadI18n } from '../test-support/i18n.js';

const sourcePath = new URL('../public/js/route-recorder.js', import.meta.url);
const tick = () => new Promise(resolve => setImmediate(resolve));

async function setup() {
  class Element extends EventTarget {
    constructor() { super(); this.children = []; this.value = ''; this.attributes = {}; }
    setAttribute(key, value) { this.attributes[key] = value; }
    appendChild(child) { this.children.push(child); }
    replaceChildren() { this.children = []; }
  }
  const ids = ['route-recording-control', 'route-recording-status', 'route-recording-pause', 'route-recording-stop', 'editor-recorded-positions', 'editor-add-position', 'route-recording-toggle'];
  const nodes = new Map(ids.map(id => [id, new Element()]));
  const document = new EventTarget();
  document.readyState = 'complete';
  document.getElementById = id => nodes.get(id);
  document.createElement = () => new Element();
  const intervals = new Map();
  const packages = new Map([['draft', { id: 'draft', route: { name: 'Entwurf' }, gpx: '[]', pois: [] }]]);
  const context = { document, Date, console,
    setInterval(callback, delay) { assert.equal(delay, 120000); intervals.set(1, callback); return 1; },
    clearInterval(id) { intervals.delete(id); },
    Wegwichtel: { Geo: { current: async () => ({ lat: 50, lon: 10, timestamp: Date.now() }) },
      LocalRoutes: {
        get: id => packages.get(id),
        save: value => packages.set(value.id, value),
        appendTrackPoint: (gpx, position) => JSON.stringify([...JSON.parse(gpx), position]),
        recordedPositions: JSON.parse,
        replaceRecordedPositions: (_gpx, positions) => JSON.stringify(positions)
      }
    }
  };
  context.globalThis = context;
  await loadI18n(context);
  vm.runInNewContext(await fs.readFile(sourcePath, 'utf8'), context, { filename: sourcePath.pathname });
  return { context, nodes, intervals, packages, recorder: context.Wegwichtel.RouteRecorder };
}

function activate(node, type = 'pointerup', key) {
  const event = new Event(type, { cancelable: true });
  if (key) Object.defineProperty(event, 'key', { value: key });
  node.dispatchEvent(event);
}

test('recording persists every two minutes during an editing session, pauses and finishes', async () => {
  const { recorder, packages, intervals, nodes } = await setup();
  recorder.start('draft'); await tick();
  assert.equal(recorder.status, 'recording');
  assert.equal(JSON.parse(packages.get('draft').gpx).length, 1);
  await intervals.get(1)();
  assert.equal(JSON.parse(packages.get('draft').gpx).length, 2);
  activate(nodes.get('route-recording-pause'));
  assert.equal(recorder.status, 'paused'); assert.equal(intervals.size, 0);
  activate(nodes.get('route-recording-pause'), 'keydown', 'Enter'); await tick();
  assert.equal(recorder.status, 'recording');
  activate(nodes.get('route-recording-stop'));
  assert.equal(recorder.status, 'idle'); assert.equal(intervals.size, 0);
  assert.equal(nodes.get('route-recording-control').hidden, true);
});

test('GPS failures remain as empty samples and late results after stopping are discarded', async () => {
  const { context, recorder, packages, intervals } = await setup();
  context.Wegwichtel.Geo.current = async () => { throw new Error('GPS fehlt'); };
  recorder.start('draft'); await tick();
  const samples = JSON.parse(packages.get('draft').gpx);
  assert.equal(samples.length, 1); assert.equal(samples[0].lat, undefined);
  let finish;
  context.Wegwichtel.Geo.current = () => new Promise(resolve => { finish = resolve; });
  const pending = intervals.get(1)();
  recorder.stop(); finish({ lat: 51, lon: 11 }); await pending;
  assert.equal(JSON.parse(packages.get('draft').gpx).length, 1);
});

test('storage errors pause recording and deleted drafts cannot be recreated by the recorder', async () => {
  const { context, recorder, packages, nodes } = await setup();
  context.Wegwichtel.LocalRoutes.save = () => { throw new Error('voll'); };
  recorder.start('draft'); await tick();
  assert.equal(recorder.status, 'paused');
  assert.match(nodes.get('route-recording-status').textContent, /Schaffe Platz/);
  packages.delete('draft');
  context.document.dispatchEvent(new Event('wegwichtel:local-routes-changed'));
  assert.equal(recorder.status, 'idle');
  recorder.resume(); assert.equal(recorder.status, 'idle');
});

test('missing recorded locations can be filled manually while newer samples remain intact', async () => {
  const { recorder, nodes } = await setup();
  const initial = JSON.stringify([{ lat: null, lon: null, timestamp: '2026-10-03T10:00:00Z' }]);
  recorder.renderPoints(initial);
  const row = nodes.get('editor-recorded-positions').children[0];
  row.children[2].value = '50'; row.children[4].value = '10';
  const latest = JSON.stringify([...JSON.parse(initial), { lat: 51, lon: 11 }]);
  const result = JSON.parse(recorder.editGpx(latest, 'Entwurf'));
  assert.equal(result[0].lat, 50); assert.equal(result[1].lat, 51);
  row.children[4].value = '';
  assert.throws(() => recorder.editGpx(latest, 'Entwurf'));
  recorder.renderPoints('[]');
  activate(nodes.get('editor-add-position'));
  assert.equal(JSON.parse(recorder.editGpx('[]', 'Entwurf')).length, 1);
});


test('ending editing stops sampling, reopening permits recording and a fresh app remains inactive', async () => {
  const { recorder, intervals, packages, nodes } = await setup();
  assert.equal(recorder.status, 'idle');
  recorder.beginEditing('draft');
  await tick();
  assert.equal(intervals.size, 0);
  nodes.get('route-recording-toggle').checked = true;
  nodes.get('route-recording-toggle').dispatchEvent(new Event('change'));
  await tick();
  assert.equal(intervals.size, 1);
  recorder.pause();
  recorder.beginEditing('draft');
  assert.equal(recorder.status, 'paused');
  recorder.endEditing();
  assert.equal(recorder.status, 'idle');
  assert.equal(recorder.routeId, null);
  assert.equal(intervals.size, 0);
  assert.equal(JSON.parse(packages.get('draft').gpx).length, 1);
  recorder.beginEditing('draft');
  await tick();
  assert.equal(recorder.status, 'idle');
  assert.equal(nodes.get('route-recording-toggle').checked, false);
  const fresh = await setup();
  assert.equal(fresh.recorder.status, 'idle');
  assert.equal(fresh.intervals.size, 0);
});


test('the switch can prepare a new draft and late GPS from an older session is ignored', async () => {
  const { context, recorder, nodes, packages, intervals } = await setup();
  const answers = [];
  context.Wegwichtel.Geo.current = () => new Promise(resolve => answers.push(resolve));
  const toggle = nodes.get('route-recording-toggle');
  toggle.checked = true; toggle.dispatchEvent(new Event('change'));
  assert.equal(answers.length, 0);
  recorder.beginEditing('draft');
  assert.equal(answers.length, 1);
  toggle.checked = false; toggle.dispatchEvent(new Event('change'));
  toggle.checked = true; toggle.dispatchEvent(new Event('change'));
  assert.equal(answers.length, 2);
  answers[1]({ lat: 52, lon: 12 }); await tick();
  answers[0]({ lat: 50, lon: 10 }); await tick();
  assert.equal(JSON.parse(packages.get('draft').gpx).length, 1);
  assert.equal(JSON.parse(packages.get('draft').gpx)[0].lat, 52);
  context.Wegwichtel.Geo.current = async () => ({ lat: 53, lon: 13 });
  context.document.visibilityState = 'visible';
  context.document.dispatchEvent(new Event('visibilitychange')); await tick();
  assert.equal(JSON.parse(packages.get('draft').gpx).length, 2);
  recorder.endEditing();
  assert.equal(intervals.size, 0);
  assert.equal(toggle.checked, false);
});

test('each crosshair fills only its own point without starting recording or saving', async () => {
  const { recorder, nodes, packages } = await setup();
  recorder.renderPoints('[{"lat":1,"lon":2},{"lat":3,"lon":4}]');
  const [first, second] = nodes.get('editor-recorded-positions').children;
  second.children[5].dispatchEvent(new Event('click')); await tick();
  assert.equal(first.children[2].value, '1');
  assert.equal(second.children[2].value, '50');
  assert.equal(second.children[4].value, '10');
  assert.equal(recorder.status, 'idle');
  assert.equal(packages.get('draft').gpx, '[]');
  assert.match(second.children[6].textContent, /Speichere/);
});

test('manual location errors preserve coordinates and stale or duplicate requests cannot overwrite points', async () => {
  const { context, recorder, nodes } = await setup();
  recorder.renderPoints('[{"lat":1,"lon":2}]');
  const row = nodes.get('editor-recorded-positions').children[0];
  context.Wegwichtel.Geo.current = async () => { throw new Error('denied'); };
  row.children[5].dispatchEvent(new Event('click')); await tick();
  assert.equal(row.children[2].value, '1');
  assert.match(row.children[6].textContent, /nicht gefunden/);
  let finish;
  let requests = 0;
  context.Wegwichtel.Geo.current = () => { requests++; return new Promise(resolve => { finish = resolve; }); };
  row.children[5].dispatchEvent(new Event('click'));
  row.children[5].dispatchEvent(new Event('click'));
  assert.equal(requests, 1);
  recorder.renderPoints('[]');
  finish({ lat: 51, lon: 11 }); await tick();
  assert.equal(row.children[2].value, '1');
  assert.equal(row.children[5].disabled, false);
});