using System.Collections.Concurrent;
using System.Reflection;
using AyCode.Services.SignalRs;

namespace TIAMWebApp.Server.Services;

public class DynamicMethodCallModel<TAttribute> where TAttribute : TagAttribute
{
    public object InstanceObject { get; init; }
    public ConcurrentDictionary<int, MethodInfoModel<TAttribute>> MethodsByMessageTag { get; init; } = new();


    public DynamicMethodCallModel(Type instanceObjectType) : this(instanceObjectType, null!)
    {
    }

    public DynamicMethodCallModel(Type instanceObjectType, params object[] constructorParams) : this(Activator.CreateInstance(instanceObjectType, constructorParams)!)
    {
    }

    public DynamicMethodCallModel(object instanceObject)
    {
        InstanceObject = instanceObject;

        foreach (var methodInfo in instanceObject.GetType().GetMethods())
        {
            if (methodInfo.GetCustomAttribute(typeof(TAttribute)) is not TAttribute attribute) continue;

            if (MethodsByMessageTag.ContainsKey(attribute.MessageTag))
                throw new Exception($"Multiple SignaRMessageTag! messageTag: {attribute.MessageTag}; methodName: {methodInfo.Name}");

            MethodsByMessageTag[attribute.MessageTag] = new MethodInfoModel<TAttribute>(attribute, methodInfo!);
        }
    }
}