using System.Reflection;
using Connected.Annotations;
using Connected.Services.Middleware;

namespace Connected.Services;

public static class ServicesExtensions
{
	public static List<Type> GetImplementedServices(this Type type)
	{
		var result = new List<Type>();
		var interfaces = type.GetInterfaces();

		foreach (var i in interfaces)
		{
			if (i.GetCustomAttribute<ServiceAttribute>() is not null)
				result.Add(i);
		}

		return result;
	}

	public static bool IsService(this Type type)
	{
		var interfaces = type.GetInterfaces();

		foreach (var i in interfaces)
		{
			if (i.GetCustomAttribute<ServiceAttribute>() is not null)
				return true;
		}

		return false;
	}

	public static bool IsServiceMiddleware(this Type type)
	{
		return type.GetInterface(typeof(IServiceMiddleware<>).FullName) is not null;
	}

	public static bool IsServiceOperation(this Type type)
	{
		return type.GetInterface(typeof(IServiceOperation<>).FullName) is not null;
	}

	public static bool IsServiceFunction(this Type type)
	{
		var nf = typeof(INullableFunction<,>).FullName;
		var f = typeof(IFunction<,>).FullName;

		return (f is not null && type.GetInterface(f) is not null)
			|| (nf is not null && type.GetInterface(nf) is not null);
	}
}