class MySQLEncryptor
  include MySQLEncryption
  include Singleton

  def encrypt(encrypt_options)
    value_to_encrypt = encrypt_options[:value].nil? ? nil : encrypt_options[:type] == 'date' ? encrypt_date(encrypt_options[:value]) : encrypt_options[:value].to_s
    mysql_encrypt(value_to_encrypt, encrypt_options[:key])
  end

  def decrypt(encrypt_options)
    decrypted_value = mysql_decrypt(encrypt_options[:value], encrypt_options[:key])
    return decrypted_value if decrypted_value.nil?

    case encrypt_options[:type]
    when 'text'
      decrypted_value.force_encoding('utf-8')
    when 'date'
      Date.parse(decrypted_value)
    when 'datetime'
      DateTime.parse(decrypted_value)
    when 'binary'
      decrypted_value # no processing
    else
      raise "Invalid type specified for post-processing decrypted value"
    end
  end

  def encrypt_date(value)
    dt = value.is_a?(String) ? Date.safe_parse(value) : value
    dt.strftime("%Y%m%d") if dt.present?
  end

end