const BASE = '/api'

async function req(method, path, body) {
  const opts = { method, headers: { 'Content-Type': 'application/json' } }
  if (body) opts.body = JSON.stringify(body)
  const r = await fetch(BASE + path, opts)
  if (!r.ok) throw new Error(`${method} ${path} → ${r.status}`)
  return r.json()
}

export const api = {
  health: () => req('GET', '/healthz'),
  peers: () => req('GET', '/peers'),
  routes: () => req('GET', '/routes'),
  scenarios: () => req('GET', '/scenarios'),
  loadScenario: name => req('POST', `/scenario/${name}`),
  unloadScenario: name => req('DELETE', `/scenario/${name}`),
  announce: payload => req('POST', '/announce', payload),
  withdraw: prefixes => req('POST', '/withdraw', { prefixes }),
  withdrawAll: () => req('POST', '/withdraw/all'),
}