// Generated by SecretKey.swift.gyb
%{
import os

secrets = ['MERCURY_CLIENT_ID', 'MERCURY_CLIENT_SECRET', 'FEEDLY_CLIENT_ID', 'FEEDLY_CLIENT_SECRET', 'INOREADER_APP_ID', 'INOREADER_APP_KEY']

def chunks(seq, size):
  return (seq[i:(i + size)] for i in range(0, len(seq), size))

def encode(string, salt):
  bytes_ = string.encode("UTF-8")
  return [bytes_[i] ^ salt[i % len(salt)] for i in range(0, len(bytes_))]

def snake_to_camel(snake_str):
  components = snake_str.split('_')
  components = [components[0].lower()] + [x.title() if x != 'ID' else x for x in components[1:]]
  camel_case_str = ''.join(components)
  return camel_case_str

salt = [byte for byte in os.urandom(64)]
}%
import Foundation

public struct SecretKey {
  % for secret in secrets:

  public static let ${snake_to_camel(secret)}: String = {
     let encoded: [UInt8] = [
      % for chunk in chunks(encode(os.environ.get(secret) or "", salt), 8):
          ${"".join(["0x%02x, " % byte for byte in chunk])}
      % end
      ]

      return decode(encoded)
  }()
  % end
}

private let salt: [UInt8] = [
% for chunk in chunks(salt, 8):
  ${"".join(["0x%02x, " % byte for byte in chunk])}
% end
]

private func decode(_ encoded: [UInt8]) -> String {
  String(decoding: encoded.enumerated().map { (offset, element) in
      element ^ salt[offset % salt.count]
  }, as: UTF8.self)
}