using System.Collections.Concurrent;
using YLErp.Abstract;

namespace YLErp.Modules.TradeRiskCalcModule.TaskRunner
{
    /// <summary>
    /// [线程安全]凤凰期权票息累积数据源
    /// </summary>
    class AutocallObservationDataSource : ITradeExtendUpdater, IDataUpdater
    {
        readonly Guid _eventGuid;
        readonly ConcurrentDictionary<int, autocall_observation[]> _dic;

        private AutocallObservationDataSource()
        {
            _dic = new ConcurrentDictionary<int, autocall_observation[]>();
            _eventGuid = Events.EventBus.Subscribe<OtcTradeUpdateEvent>(t =>
            {
                UpdateData(t.TradeIds);
            });
        }

        ~AutocallObservationDataSource()
        {
            Events.EventBus.Unsubscribe(_eventGuid);
        }

        public List<autocall_observation> GetDatas(int tradId)
        {
            if (!_dic.TryGetValue(tradId, out var datas))
            {
                using (var db = DbContextFactory.GetYLDbContext())
                {
                    _dic[tradId] = datas = db.autocall_observation.AsNoTracking()
                        .Where(n => n.TradeId == tradId).OrderBy(n => n.PaymentDate).ToArray();
                }
            }
            return datas.Select(t => t.Clone()).ToList();
        }

        /// <summary>
        /// 跟随trade更新
        /// </summary>
        public void UpdateData(IEnumerable<int> tradeIds)
        {
            if (_dic.Count > 5000)
            {
                _dic.Clear();
                return;
            }

            if (tradeIds == null || !tradeIds.Any())
            {
                return;
            }

            foreach (var tradId in tradeIds)
            {
                _dic.TryRemove(tradId, out _);
            }
        }

        public void UpdateData(IEnumerable<string> updateKeyIds)
        {
            var tradeIds = DataConvert.ConvertToInt32Array(updateKeyIds);
            this.UpdateData(tradeIds);
        }

        /// <summary>
        /// 偷个懒使用这个
        /// </summary>
        public static readonly AutocallObservationDataSource Default;

        public string TableName => "autocall_observation";

        static AutocallObservationDataSource()
        {
            Default = new AutocallObservationDataSource();
        }
    }
}