export function byteStringResponseHeaders(headers: Record<string, string | string[]> = {}) {
  return Object.fromEntries(Object.entries(headers).map(([name, values]) => [
    name,
    (Array.isArray(values) ? values : [values]).map((value) => value.replace(/[^\x00-\xff]+/gu, encodeURIComponent)),
  ]))
}

export function prepareFetchHeaders(target: Electron.Session) {
  // Electron net.fetch throws outside its promise when a response header contains Unicode.
  target.webRequest.onHeadersReceived((details, callback) => {
    callback({
      responseHeaders: byteStringResponseHeaders(details.responseHeaders),
      statusLine: asciiStatusLine(details.statusLine),
    })
  })
}

export function asciiStatusLine(line: string) {
  return /[^\x20-\x7e]/.test(line) ? line.replace(/^(HTTP\/\S+\s+\d{3}).*$/, '$1 ') : line
}