namespace Bofa.Serialization;

using System;
using System.Reflection;

using Bofa;

[AttributeUsage(.Struct | .Class)]
struct BofaSerializeAttribute : Attribute, IOnTypeInit
{
	[Comptime]
	public void OnTypeInit(Type type, Self* prev)
	{
		String serializeString = scope .("public bool Serialize(Bofa b)\n{\n");
		String deserializeString = scope .("public bool Deserialize(Bofa b)\n{\n");

		serializeString.Append("""
				b.Type = .Object;
				b.Value.Object = new .();
				b.Typename = "Object";
				Bofa toAdd;

			""");

		deserializeString.Append("""
				if(b.Type != .Object)
					return false;

			""");


		var fields = type.GetFields();
		for(var f in fields)
		{
			if(!f.IsPublic && !f.HasCustomAttribute<BofaIncludeAttribute>())
				continue;

			bool hasIFace = false;
			for(var i in f.FieldType.Interfaces)
				if(i == typeof(IBofaParseable))
					hasIFace = true;

			//Hardcoded stuff
			if(f.FieldType == typeof(int))
				hasIFace = true;
			else if(f.FieldType == typeof(int8))
				hasIFace = true;
			else if(f.FieldType == typeof(int16))
				hasIFace = true;
			else if(f.FieldType == typeof(int32))
				hasIFace = true;
			else if(f.FieldType == typeof(int64))
				hasIFace = true;
			else if(f.FieldType == typeof(uint))
				hasIFace = true;
			else if(f.FieldType == typeof(uint8))
				hasIFace = true;
			else if(f.FieldType == typeof(uint16))
				hasIFace = true;
			else if(f.FieldType == typeof(uint32))
				hasIFace = true;
			else if(f.FieldType == typeof(uint64))
				hasIFace = true;
			else if(f.FieldType == typeof(char8))
				hasIFace = true;
			else if(f.FieldType == typeof(char16))
				hasIFace = true;
			else if(f.FieldType == typeof(char32))
				hasIFace = true;
			else if(f.FieldType == typeof(float))
				hasIFace = true;
			else if(f.FieldType == typeof(double))
				hasIFace = true;

			if(!hasIFace)
				continue;


			StringView name;
			name = f.Name;
			if(f.HasCustomAttribute<BofaIncludeAttribute>() && f.GetCustomAttribute<BofaIncludeAttribute>() case .Ok(let attr))
				name = attr.Name;

			serializeString.Append(scope $"""
					toAdd = new .();
					toAdd.Name = "{name}";
					if(!{f.Name}.Serialize(toAdd))
					\{
						delete toAdd;
						return false;
					\}
					else
						b.Value.Object.Add("{name}", toAdd);
				""");

			deserializeString.Append(scope $"""
					if(!b.Value.Object.ContainsKey("{name}"))
						return false;
					if(!{f.Name}.Deserialize(b.Value.Object["{name}"]))
						return false;
				""");

		}


		serializeString.Append("\n\treturn true;\n}\n");
		deserializeString.Append("\n\treturn true;\n}\n");
		Compiler.EmitTypeBody(type, serializeString);
		Compiler.EmitTypeBody(type, deserializeString);
		Compiler.EmitAddInterface(type, typeof(IBofaParseable));
	}
}