using System;
using System.Collections.Generic;
using System.Linq;
using YLErp.BLL;

namespace YLErp.Modules.MarginModule
{
    public class eod_commodity_future_priceBLLBak
    {
        private readonly YLContext db = new YLContext();

        public static List<string> DataSources = new List<string> { "系统", "人工" };

        /// <summary>
        /// 获取指定日期的收盘价或结算价
        /// </summary>
        /// <param name="codes">标的代码</param>
        /// <param name="date">日期</param>
        /// <param name="priceType">
        /// 价格类型:
        /// <para>0:最高价;</para>
        /// <para>1:最低价;</para>
        /// <para>2:收盘价;</para>
        /// <para>3:结算价;</para>
        /// </param>
        /// <returns></returns>
        public Dictionary<string, double> GetEodPrice(IEnumerable<string> codes, DateTime date, int priceType)
        {
            if (priceType < 0 || priceType > 3) { throw new ArgumentOutOfRangeException("priceType"); }
            var result = new Dictionary<string, double>();
            #region 商品期货
            var futurePirce =
                (from priceDb in db.eod_commodity_future_price
                 where priceDb.ValueDate == date
                 && codes.Contains(priceDb.UnderlyingCode)
                 select new { priceDb.UnderlyingCode, priceDb.HighPrice, priceDb.LowPrice, priceDb.ClosePrice, priceDb.SettlePrice })
                 .ToDictionary(
                    K => K.UnderlyingCode,
                    V => { switch (priceType) { case 0: return V.HighPrice ?? 0; case 1: return V.LowPrice ?? 0; case 2: return V.ClosePrice; case 3: return V.SettlePrice; default: return 0; } }
                    , StringComparer.OrdinalIgnoreCase);
            #endregion
            #region 股票
            var stockPirce =
                (from priceDb in db.eod_stock_price
                 where priceDb.ValueDate == date
                 && codes.Contains(priceDb.UnderlyingCode)
                 select new { priceDb.UnderlyingCode, priceDb.HighPrice, priceDb.LowPrice, priceDb.ClosePrice })
                 .ToDictionary(
                    K => K.UnderlyingCode,
                    V => { switch (priceType) { case 0: return V.HighPrice ?? 0; case 1: return V.LowPrice ?? 0; case 2: return V.ClosePrice; case 3: return V.ClosePrice; default: return 0; } }
                    , StringComparer.OrdinalIgnoreCase);
            #endregion
            #region 场内期权
            var exchangePirce =
                (from priceDb in db.eod_exchange_option_price
                 where priceDb.ValueDate == date
                 && codes.Contains(priceDb.UnderlyingCode)
                 select new { priceDb.UnderlyingCode, priceDb.HighPrice, priceDb.LowPrice, priceDb.ClosePrice, priceDb.SettlePrice })
                 .ToDictionary(
                    K => K.UnderlyingCode,
                    V => { switch (priceType) { case 0: return V.HighPrice ?? 0; case 1: return V.LowPrice ?? 0; case 2: return V.ClosePrice; case 3: return V.SettlePrice; default: return 0; } }
                    , StringComparer.OrdinalIgnoreCase);
            #endregion
            var errorCode = new List<string>();
            foreach (var item in codes)
            {
                if (!futurePirce.ContainsKey(item) &&
                    !stockPirce.ContainsKey(item) &&
                    !exchangePirce.ContainsKey(item))
                { errorCode.Add(item); }
                if (futurePirce.ContainsKey(item))
                { result[item] = futurePirce[item]; }
                else if (stockPirce.ContainsKey(item))
                { result[item] = stockPirce[item]; }
                else if (exchangePirce.ContainsKey(item))
                { result[item] = exchangePirce[item]; }
                else { result[item] = 0; }
            }
            if (errorCode.Count > 0)
            { throw new Exception($"{string.Join(",", errorCode)} 价格缺失"); }

            return result;
        }

        /// <summary>
        /// 获取指定日期的收盘价或结算价
        /// </summary>
        /// <param name="codes">标的代码</param>
        /// <param name="date">日期</param>
        /// <param name="priceType">
        /// 价格类型:
        /// <para>0:最高价;</para>
        /// <para>1:最低价;</para>
        /// <para>2:收盘价;</para>
        /// <para>3:结算价;</para>
        /// </param>
        /// <returns></returns>
        public Dictionary<int, double> GetEodPriceToId(IEnumerable<string> codes, DateTime date, int priceType)
        {
            var result = new Dictionary<int, double>();
            var dict = GetEodPrice(codes, date, priceType);
            foreach (var item in dict)
            {
                var um = DataCacheProvider.GetUnderlyingDataSource().GetData(item.Key);
                if (um == null)
                {
                    continue;
                }
                result[um.id] = item.Value;
            }
            return result;
        }
    }
}