class SecureWebToken

# File lib/secure_web_token.rb, line 18
def decode(payload, sig_key = nil, enc_key = nil)
  sig_key ||= signing_key
  enc_key ||= encryption_key
  decrypted = ::JWE.decrypt(payload, enc_key)

  ::JWT.decode(decrypted, sig_key, true, algorithm: 'HS512')[0]
end

# File lib/secure_web_token.rb, line 29
def default_encryption_key
  if defined?(@default_enc_key) && is_present?(@default_enc_key)
    if @default_enc_key.respond_to? :call then
      get_presence(@default_enc_key.call) || gen_encryption_key
    else
      @default_enc_key
    end
  else
    gen_encryption_key
  end
end

# File lib/secure_web_token.rb, line 41
def default_encryption_key=(value_or_callable)
  @default_enc_key = value_or_callable
end

# File lib/secure_web_token.rb, line 45
def default_signing_key
  if defined?(@default_sig_key) && is_present?(@default_sig_key)
    if @default_sig_key.respond_to? :call then
      get_presence(@default_sig_key.call) || gen_signing_key
    else
      @default_sig_key
    end
  else
    gen_signing_key
  end
end

# File lib/secure_web_token.rb, line 57
def default_signing_key=(value_or_callable)
  @default_sig_key = value_or_callable
end

# File lib/secure_web_token.rb, line 61
def encode(payload, sig_key = nil, enc_key = nil, options = nil)
  sig_key ||= signing_key
  enc_key ||= encryption_key
  options ||= encrypt_options
  encoded = ::JWT.encode(payload, sig_key, 'HS512')

  ::JWE.encrypt(encoded, enc_key, **options)
end

# File lib/secure_web_token.rb, line 73
def encrypt_options
  @encrypt_options ||= DEFAULT_OPTIONS
end

# File lib/secure_web_token.rb, line 77
def encrypt_options=(options)
  @encrypt_options = (options || DEFAULT_OPTIONS)
end

# File lib/secure_web_token.rb, line 81
def encryption_key
  @encryption_key ||= default_encryption_key
end

# File lib/secure_web_token.rb, line 85
def encryption_key=(key)
  @encryption_key = (key || gen_encryption_key)
end

# File lib/secure_web_token.rb, line 89
def gen_encryption_key
  SecureRandom.random_bytes(32)
end

# File lib/secure_web_token.rb, line 93
def gen_signing_key(length = 50)
  (0...length).map { CHARACTERS[rand(CHARACTERS.length)] }.join
end

# File lib/secure_web_token.rb, line 97
def signing_key
  @signing_key ||= default_signing_key
end

# File lib/secure_web_token.rb, line 101
def signing_key=(key)
  @signing_key = (key || gen_signing_key)
end

# File lib/secure_web_token.rb, line 120
def get_presence(object)
  if object.respond_to?(:presence)
    object.presence
  elsif is_present?(object)
    object
  end
end

# File lib/secure_web_token.rb, line 106
def is_blank?(object)
  object.respond_to?(:blank?) ?
    object.blank? :
    is_empty?(object)
end

# File lib/secure_web_token.rb, line 112
def is_empty?(object)
  object.respond_to?(:empty?) ? !!object.empty? : !object
end

# File lib/secure_web_token.rb, line 116
def is_present?(object)
  object.respond_to?(:present?) ? object.present? : !is_blank?(object)
end