// Hash-based router. Routes:
//   #/                      home
//   #/space/:id             space view
//   #/project/:id           project view
//   #/page/:id              page view
//   #/ref/:id               reference detail
//   #/resource/:id          resource detail
//   #/search?q=             search results
//   #/inbox                 pending changes
//   #/sacred-valley         dashboard placeholder
//   #/sentinel              Yerin security view
// Anything unrecognized falls through to the home handler.

const ROUTES = [
  { name: 'space',    re: /^\/space\/([^/]+)$/,    keys: ['id'] },
  { name: 'project',  re: /^\/project\/([^/]+)$/,  keys: ['id'] },
  { name: 'page',     re: /^\/page\/([^/]+)$/,     keys: ['id'] },
  { name: 'ref',      re: /^\/ref\/([^/]+)$/,      keys: ['id'] },
  { name: 'resource', re: /^\/resource\/([^/]+)$/, keys: ['id'] },
  { name: 'search',   re: /^\/search$/,            keys: [] },
  { name: 'inbox',    re: /^\/inbox$/,             keys: [] },
  { name: 'sacred-valley', re: /^\/sacred-valley$/, keys: [] },
  { name: 'sentinel', re: /^\/sentinel$/, keys: [] },
  { name: 'jobs', re: /^\/jobs$/, keys: [] },
  { name: 'home',     re: /^\/?$/,                 keys: [] }
];

export function current() {
  const raw = (location.hash || '#/').slice(1);
  const [path, queryString = ''] = raw.split('?');
  const query = Object.fromEntries(new URLSearchParams(queryString));
  for (const r of ROUTES) {
    const m = path.match(r.re);
    if (m) {
      const params = {};
      r.keys.forEach((k, i) => { params[k] = m[i + 1]; });
      return { name: r.name, params, query, hash: raw };
    }
  }
  return { name: 'home', params: {}, query: {}, hash: raw };
}

export function navigate(hash) {
  location.hash = hash.startsWith('#') ? hash : '#' + hash;
}

export function route(handler) {
  window.addEventListener('hashchange', () => handler(current()));
  handler(current());
}