import { transformSync } from 'esbuild';
import { readFileSync, writeFileSync } from 'fs';
import { pathToFileURL } from 'url';

function build(src, out) {
  let js = transformSync(readFileSync(src, 'utf8'), { loader: 'ts', format: 'esm', target: 'node20' }).code;
  js = js.replace(/from\s+['"]\.\/chart['"]/g, "from './chart.js'");
  writeFileSync(out, js);
}
build('src/lib/wifi/chart.ts', '/tmp/chart.js');
build('src/lib/wifi/recommend.ts', '/tmp/recommend.js');
const { recommend24GhzChannels } = await import(pathToFileURL('/tmp/recommend.js').href);

function alt(nets) {
  const w = (c, n) => {
    const d = Math.abs(c - n.channel);
    if (d >= 5) return 0;
    return (1 - d / 5) * Math.min(1, Math.max(0.1, (n.rssi + 90) / 60));
  };
  return [1, 6, 11].map((channel) => ({
    channel, load: Math.round(nets.reduce((s, n) => s + w(channel, n), 0) * 100) / 100,
  })).sort((a, b) => a.load - b.load);
}

const FAELLE = [
  {
    name: 'Demo-Lage (wie im Screenshot)',
    nets: [
      { channel: 6,  frequency: 2437, rssi: -53, band: '2.4 GHz', widthMhz: 20 },
      { channel: 11, frequency: 2462, rssi: -61, band: '2.4 GHz', widthMhz: 20 },
      { channel: 1,  frequency: 2412, rssi: -75, band: '2.4 GHz', widthMhz: 40, centerFreq0: 2422 },
      { channel: 11, frequency: 2462, rssi: -77, band: '2.4 GHz', widthMhz: 20 },
      { channel: 13, frequency: 2472, rssi: -85, band: '2.4 GHz', widthMhz: 20 },
    ],
  },
  {
    name: 'STARKES 40-MHz-Netz auf Kanal 1, schwache Nachbarn auf 6 und 11',
    nets: [
      { channel: 1,  frequency: 2412, rssi: -45, band: '2.4 GHz', widthMhz: 40, centerFreq0: 2422 },
      { channel: 6,  frequency: 2437, rssi: -85, band: '2.4 GHz', widthMhz: 20 },
      { channel: 11, frequency: 2462, rssi: -80, band: '2.4 GHz', widthMhz: 20 },
    ],
  },
  {
    name: 'Starkes 40-MHz-Netz auf Kanal 9 (überdeckt 6 UND 11)',
    nets: [
      { channel: 9,  frequency: 2452, rssi: -50, band: '2.4 GHz', widthMhz: 40, centerFreq0: 2442 },
      { channel: 1,  frequency: 2412, rssi: -70, band: '2.4 GHz', widthMhz: 20 },
    ],
  },
];

for (const f of FAELLE) {
  const neu = recommend24GhzChannels(f.nets);
  const a = alt(f.nets);
  const kippt = neu[0].channel !== a[0].channel;
  console.log(`\n${f.name}`);
  console.log(`  ALT: ${a.map(r => `K${r.channel}=${r.load}`).join('  ')}   -> empfiehlt Kanal ${a[0].channel}`);
  console.log(`  NEU: ${neu.map(r => `K${r.channel}=${r.load}`).join('  ')}   -> empfiehlt Kanal ${neu[0].channel}`);
  console.log(`  ${kippt ? '>>> EMPFEHLUNG KIPPT — alte Formel hätte den falschen Kanal genannt' : '    (gleiche Empfehlung, nur andere Bewertung)'}`);
}