using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;

namespace LSA.Core.Dapper.Service.Caching
{
    public static class CacheKeyHelper
    {
        public static string GenerateCacheKey(object instance, string methodName, params object[] parameters)
        {
            var className = instance.GetType().Name;
            var keyBuilder = new StringBuilder($"{className}.{methodName}");

            foreach (var param in parameters)
            {
                string normalizedParam = NormalizeParameter(param);
                keyBuilder.Append($".{normalizedParam}");
            }

            return keyBuilder.ToString();
        }

        private static string NormalizeParameter(object param)
        {
            if (param == null)
            {
                return "null";
            }

            string paramString;

            if (param is DateTime dateTime)
            {
                paramString = dateTime.ToString("yyyyMMdd");
            }
            else
            {
                paramString = param.ToString();
            }

            // Replace special characters with an underscore
            string normalizedParam = Regex.Replace(paramString, @"[^a-zA-Z0-9]", "_");

            return normalizedParam;
        }
    }
}