using System;
using System.Collections.Generic;
using System.Linq;
using Code.Example.Race.Track;
using Code.Infrastructure.EventBus;

namespace Code.Example.Race
{
    public class RaceScores : IRacerPassedCheckpointHandler, IDisposable
    {
        private Dictionary<Racer.AI.Racer, int> _scores = new();
        private EventBus _eventBus;

        public RaceScores(EventBus eventBus)
        {
            _eventBus = eventBus;
            _eventBus.Subscribe(this);
        }
        public void SubscribeRacer(Racer.AI.Racer racer)
        {
            _scores.Add(racer, 0);
        }

        public void ChangeScore(Racer.AI.Racer racer, int additionalScore)
        {
            _scores[racer] += additionalScore;
            _eventBus.RaiseEvent<IScoreChangedHandle>(x=> x.ScoreChanged(racer,additionalScore, GetScores()));
        }
        
        public void UnsubscribeRacer(Racer.AI.Racer racer)
        {
            _scores.Remove(racer);
        }

        public List<KeyValuePair<Racer.AI.Racer, int>> GetScores()
        {
            return _scores.OrderByDescending(x => x.Value).ToList();
        }

        public void OnRacerPassedCheckpoint(Racer.AI.Racer racer) => ChangeScore(racer,1);

        public void Dispose()
        {
            _eventBus.Unsubscribe(this);
        }
    }

    public interface IScoreChangedHandle : IGlobalSubscriber
    {
        void ScoreChanged(Racer.AI.Racer racer, int additionalScore, List<KeyValuePair<Racer.AI.Racer, int>> scores);
    }
}