module ForemanOpenscap::PolicyCommon

def cron_line_split
  cron_line.to_s.split(' ')
end

def erase_period_attrs(attrs)
  attrs.each { |attr| self.public_send("#{attr}=", nil) }
end

def period_enc
  # get crontab expression as an array (minute hour day_of_month month day_of_week)
  cron_parts = case period
               when 'weekly'
                 ['0', '1', '*', '*', weekday_number.to_s]
               when 'monthly'
                 ['0', '1', day_of_month.to_s, '*', '*']
               when 'custom'
                 cron_line_split
               else
                 raise 'invalid period specification'
               end
  {
    'minute' => cron_parts[0],
    'hour' => cron_parts[1],
    'monthday' => cron_parts[2],
    'month' => cron_parts[3],
    'weekday' => cron_parts[4],
  }
end

def update_period_attrs
  case period
  when 'monthly'
    erase_period_attrs(%w[cron_line weekday])
  when 'weekly'
    erase_period_attrs(%w[cron_line day_of_month])
  when 'custom'
    erase_period_attrs(%w[weekday day_of_month])
  end
end

def valid_cron_line
  if period == 'custom'
    errors.add(:cron_line, _("does not consist of 5 parts separated by space")) unless cron_line_split.size == 5
  end
end

def valid_day_of_month
  if period == 'monthly'
    errors.add(:day_of_month, _("must be between 1 and 31")) if !day_of_month || (day_of_month < 1 || day_of_month > 31)
  end
end

def valid_weekday
  if period == 'weekly'
    errors.add(:weekday, _("is not a valid value")) unless Date::DAYNAMES.map(&:downcase).include? weekday
  end
end

def weekday_number
  # 0 is sunday, 1 is monday in cron, while DAYS_INTO_WEEK has 0 as monday, 6 as sunday
  (Date::DAYS_INTO_WEEK.with_indifferent_access[weekday]) % 7
end