module AccomTravelUrl

# File lib/accom_travel_url.rb, line 21
def build_search_url(location:, check_in:, check_out:, nights:)
  query = "Hotels in #{location.to_s.strip}"
  ts = build_ts_param(check_in, check_out, nights: nights)
  params = {
    "q" => query,
    "qs" => "CAE4AA",
    "ts" => ts,
    "ap" => "MAE"
  }
  "#{BASE_URL}?#{params.map { |key, value| "#{key}=#{CGI.escape(value)}" }.join('&')}"
end

# File lib/accom_travel_url.rb, line 13
def build_ts_param(check_in, check_out, nights: nil)
  _ = nights
  check_in_str = check_in.strftime("%Y-%m-%d")
  check_out_str = check_out.strftime("%Y-%m-%d")
  payload = encode_length_delimited(1, check_in_str) + encode_length_delimited(2, check_out_str)
  Base64.urlsafe_encode64(payload).delete("=")
end

# File lib/accom_travel_url.rb, line 33
def encode_length_delimited(field_number, value)
  tag = (field_number << 3) | 2
  bytes = value.to_s.b
  encode_varint(tag) + encode_varint(bytes.bytesize) + bytes
end

# File lib/accom_travel_url.rb, line 39
def encode_varint(value)
  buffer = +""
  n = value.to_i
  loop do
    byte = n & 0x7F
    n >>= 7
    byte |= 0x80 if n.positive?
    buffer << byte.chr
    break unless n.positive?
  end
  buffer
end