using System;
using Org.BouncyCastle.Utilities;

namespace Org.BouncyCastle.Asn1;

public class DerVisibleString : DerStringBase
{
	private readonly string str;

	public static DerVisibleString GetInstance(object obj)
	{
		if (obj == null || obj is DerVisibleString)
		{
			return (DerVisibleString)obj;
		}
		if (obj is Asn1OctetString)
		{
			return new DerVisibleString(((Asn1OctetString)obj).GetOctets());
		}
		if (obj is Asn1TaggedObject)
		{
			return GetInstance(((Asn1TaggedObject)obj).GetObject());
		}
		throw new ArgumentException("illegal object in GetInstance: " + Platform.GetTypeName(obj));
	}

	public static DerVisibleString GetInstance(Asn1TaggedObject obj, bool explicitly)
	{
		return GetInstance(obj.GetObject());
	}

	public DerVisibleString(byte[] str)
		: this(Strings.FromAsciiByteArray(str))
	{
	}

	public DerVisibleString(string str)
	{
		if (str == null)
		{
			throw new ArgumentNullException("str");
		}
		this.str = str;
	}

	public override string GetString()
	{
		return str;
	}

	public byte[] GetOctets()
	{
		return Strings.ToAsciiByteArray(str);
	}

	internal override void Encode(DerOutputStream derOut)
	{
		derOut.WriteEncoded(26, GetOctets());
	}

	protected override bool Asn1Equals(Asn1Object asn1Object)
	{
		if (!(asn1Object is DerVisibleString derVisibleString))
		{
			return false;
		}
		return str.Equals(derVisibleString.str);
	}

	protected override int Asn1GetHashCode()
	{
		return str.GetHashCode();
	}
}