module AbiCoderRb
  def decode_array(type, data)
    l = decode_uint256(data[0, 32])
    raise DecodingError, "Too long length: #{l}" if l > 100_000

    subtype = type.subtype

    if subtype.dynamic?
      raise DecodingError, "Not enough data for head" unless data.size >= 32 + 32 * l

      start_positions = (1..l).map { |i| 32 + decode_uint256(data[32 * i, 32]) }
      start_positions.push(data.size)

      outputs = (0...l).map { |i| data[start_positions[i]...start_positions[i + 1]] }

      outputs.map { |out| decode_type(subtype, out) }
    else
      (0...l).map { |i| decode_type(subtype, data[(32 + subtype.size * i)..]) }
    end
  end
end