using System;
using System.Drawing;
using System.Net;

namespace DutyContent.ThirdParty
{
	static class Converter
	{
		public static bool TryLong(string s, out long ret)
		{
			ret = 0;

			for (int i = 0; i < s.Length; i++)
			{
				var n = s[i] - '0';
				if (n < 0 || n > 9)
					return false;

				ret = ret * 10 + n;
			}

			return true;
		}

		public static long ToLong(string s, long failret = 0)
		{
			long ret = 0;

			for (int i = 0; i < s.Length; i++)
			{
				var n = s[i] - '0';
				if (n < 0 || n > 9)
					return failret;

				ret = ret * 10 + n;
			}

			return ret;
		}

		public static bool TryInt(string s, out int ret)
		{
			ret = 0;

			for (int i = 0; i < s.Length; i++)
			{
				var n = s[i] - '0';
				if (n < 0 || n > 9)
					return false;

				ret = ret * 10 + n;
			}

			return true;
		}

		public static int ToInt(string s, int failret = 0)
		{
			int ret = 0;

			for (int i = 0; i < s.Length; i++)
			{
				var n = s[i] - '0';
				if (n < 0 || n > 9)
					return failret;

				ret = ret * 10 + n;
			}

			return ret;
		}

		public static bool TryUshort(string s, out ushort ret)
		{
			ret = 0;

			for (int i = 0; i < s.Length; i++)
			{
				var n = s[i] - '0';
				if (n < 0 || n > 9)
					return false;

				ret = (ushort)(ret * 10 + n);
			}

			return true;
		}

		public static ushort ToUshort(string s, ushort failret = 0)
		{
			int ret = 0;

			for (int i = 0; i < s.Length; i++)
			{
				var n = s[i] - '0';
				if (n < 0 || n > 9)
					return failret;

				ret = ret * 10 + n;
			}

			return (ushort)ret;
		}

		public static bool ToBool(string s)
		{
			return s.ToUpper().Equals("TRUE");
		}

		public static bool ToBool(string s, bool failret)
		{
			return string.IsNullOrEmpty(s) ? failret : s.ToUpper().Equals("TRUE");
		}

		public static float ToFloat(string s, float failret = 0.0f)
		{
			return float.TryParse(s, out float v) ? v : failret;
		}

		public static Color ToColorArgb(string s, Color failret)
		{
			try
			{
				var i = Convert.ToInt32(s, 16);
				var r = Color.FromArgb(i);
				return r;
			}
			catch
			{
				return failret;
			}
		}

		public static Color ToColorArgb(string s)
		{
			return ToColorArgb(s, Color.Transparent);
		}

		public static IPAddress ToIPAddressFromIPV4(string ipstr)
		{
			try
			{
				var sa = ipstr.Trim().Split('.');
				if (sa.Length == 4)
				{
					if (sa[3].Contains(":"))
						sa[3] = sa[3].Substring(0, sa[3].IndexOf(":"));

					var ivs = new byte[4];
					for (var i = 0; i < 4; i++)
						ivs[i] = byte.Parse(sa[i]);

					return new IPAddress(ivs);
				}
			}
			catch { }

			return IPAddress.None;
		}
	}
}