namespace MessagingToolkit.QRCode.Codec.Util;

public class ContentConverter
{
	internal static char n = '\n';

	public static string convert(string targetString)
	{
		if (targetString == null)
		{
			return targetString;
		}
		if (targetString.IndexOf("MEBKM:") > -1)
		{
			targetString = convertDocomoBookmark(targetString);
		}
		if (targetString.IndexOf("MECARD:") > -1)
		{
			targetString = convertDocomoAddressBook(targetString);
		}
		if (targetString.IndexOf("MATMSG:") > -1)
		{
			targetString = convertDocomoMailto(targetString);
		}
		if (targetString.IndexOf("http\\://") > -1)
		{
			targetString = replaceString(targetString, "http\\://", "\nhttp://");
		}
		return targetString;
	}

	private static string convertDocomoBookmark(string targetString)
	{
		targetString = removeString(targetString, "MEBKM:");
		targetString = removeString(targetString, "TITLE:");
		targetString = removeString(targetString, ";");
		targetString = removeString(targetString, "URL:");
		return targetString;
	}

	private static string convertDocomoAddressBook(string targetString)
	{
		targetString = removeString(targetString, "MECARD:");
		targetString = removeString(targetString, ";");
		targetString = replaceString(targetString, "N:", "NAME1:");
		targetString = replaceString(targetString, "SOUND:", n + "NAME2:");
		targetString = replaceString(targetString, "TEL:", n + "TEL1:");
		targetString = replaceString(targetString, "EMAIL:", n + "MAIL1:");
		targetString += n;
		return targetString;
	}

	private static string convertDocomoMailto(string s)
	{
		string s2 = s;
		char c = '\n';
		s2 = removeString(s2, "MATMSG:");
		s2 = removeString(s2, ";");
		s2 = replaceString(s2, "TO:", "MAILTO:");
		s2 = replaceString(s2, "SUB:", c + "SUBJECT:");
		s2 = replaceString(s2, "BODY:", c + "BODY:");
		return s2 + c;
	}

	private static string replaceString(string s, string s1, string s2)
	{
		string text = s;
		for (int num = text.IndexOf(s1, 0); num > -1; num = text.IndexOf(s1, num + s2.Length))
		{
			text = text.Substring(0, num) + s2 + text.Substring(num + s1.Length);
		}
		return text;
	}

	private static string removeString(string s, string s1)
	{
		return replaceString(s, s1, "");
	}
}