AwsSnapshotScheduler.Program.GetExpireHours C# (CSharp) Method

        public static int GetExpireHours(string[] p, int def = 0)
        {
            int ah = def;

            for (int x = 0; x < p.Length; x++)
            {
                string r = p[x];
                if (r.StartsWith("x"))
                {

                    MatchCollection mc = Regex.Matches(r.Substring(1), @"(\d*)(d|day|days|h|hour|hours|w|week|weeks)?", RegexOptions.IgnoreCase);
                    if (mc.Count > 0)
                    {
                        if (mc[0].Groups.Count >= 2)
                        {
                            ah = Convert.ToInt32(mc[0].Groups[1].Value);
                        }
                        if (mc[0].Groups.Count >= 3)
                        {
                            switch (mc[0].Groups[2].Value.ToLower())
                            {
                                case "d":
                                case "days":
                                case "day":
                                    ah = ah * 24;
                                    break;
                                case "w":
                                case "weeks":
                                case "week":
                                    ah = ah * 24 * 7;
                                    break;
                                case "m":
                                case "months":
                                case "month":
                                    ah = ah * 24 * 30;
                                    break;

                            }
                        }

                    }

                    break;
                }
            }

            return ah;
        }