// Serves the fixture feeds so the daemon under test has something real to scan.
const http = require('http');
const fs = require('fs');
const path = require('path');

const dir = __dirname;
const port = Number(process.env.FIXTURE_PORT || 8792);

http.createServer((req, res) => {
  // Jev, for Signals (#254): sure of an item whose text has a question's keyword in it. Refuses
  // a request in the shape TypeSafe refuses, as it does (#257).
  if (req.method === 'POST' && req.url === '/jev') {
    let body = '';
    req.on('data', c => { body += c; });
    req.on('end', () => {
      const { state, questions } = JSON.parse(body);
      if (Object.values(questions).some(q => typeof q.criteria !== 'object')) {
        res.writeHead(422, { 'content-type': 'application/json' }).end('{"detail":"criteria should be an object"}');
        return;
      }
      const title = String(state).toLowerCase();
      const answers = {};
      for (const [id, q] of Object.entries(questions)) {
        const words = /described by these words: ([^.]*)\./.exec(q.instructions)[1].split(', ');
        answers[id] = { noul: words.some(w => title.includes(w.toLowerCase())) ? 0.9 : 0.1 };
      }
      res.writeHead(200, { 'content-type': 'application/json' }).end(JSON.stringify({ answers }));
    });
    return;
  }
  // Dated today, since a Signal looks at the last 30 days only.
  if (req.url === '/signal.xml') {
    const now = new Date().toUTCString();
    const item = (guid, title) => `<item><guid>${guid}</guid><title>${title}</title><pubDate>${now}</pubDate></item>`;
    res.writeHead(200, { 'content-type': 'application/xml' }).end(`<?xml version="1.0"?><rss version="2.0"><channel>
      <title>Signal Show</title>${item('sig-1', 'Monaco qualifying')}${item('sig-2', 'Baking bread')}</channel></rss>`);
    return;
  }
  const name = decodeURIComponent(req.url.split('?')[0].replace(/^\//, '')) || 'index';
  const file = path.join(dir, path.basename(name));
  fs.readFile(file, (err, body) => {
    if (err) { res.writeHead(404).end('no'); return; }
    const type = file.endsWith('.mp3') ? 'audio/mpeg'
      : file.endsWith('.opml') ? 'text/x-opml'
      // Artwork as an image, or /api/art refuses it as not one.
      : file.endsWith('.jpg') ? 'image/jpeg'
      : file.endsWith('.html') ? 'text/html' : 'application/xml';
    res.writeHead(200, { 'content-type': type, 'content-length': body.length });
    res.end(body);
  });
}).listen(port, '127.0.0.1', () => console.log(`fixtures on ${port}`));