using System.Collections.Concurrent;

namespace MP.IOC.Services
{

    public class InMemoryWeightProvider : IWeightProvider
    {
        private readonly ConcurrentDictionary<string, (int oldW, int newW)> _map = new();
        private readonly int _defaultOld;
        private readonly int _defaultNew;

        public InMemoryWeightProvider(IConfiguration config)
        {
            _defaultOld = config.GetValue<int>("RouteMan:DefaultWeightOld", 100);
            _defaultNew = config.GetValue<int>("RouteMan:DefaultWeightNew", 0);
        }

        public (int oldWeight, int newWeight) GetWeightsFor(string method)
        {
            if (string.IsNullOrEmpty(method)) method = "unknown";
            return _map.GetOrAdd(method, _ => (_defaultOld, _defaultNew));
        }

        public void SetWeights(string method, int oldWeight, int newWeight)
        {
            _map[method] = (Math.Clamp(oldWeight, 0, 100), Math.Clamp(newWeight, 0, 100));
        }
    }


}