using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.Linq;
using YLErp.DBModels;
using YLErp.Modules.DataProviderModule;

namespace YLErp.Modules.VolatilityModule
{
    [TestClass]
    public class VarietyVolServiceTest : YLUnitTestBase
    {
        [ClassInitialize]
        public static void Init(TestContext context)
        {
            using (var db = DbContextFactory.GetYLDbContext())
            {
                db.OptUser = new OptUserInfo(0, "UnitTest");

                db.Database.ExecuteSqlCommand("truncate table variety_vol;");

                var datas = new[] {
                new VarietyVol{ VarietyId = 1,ValueDate = new DateTime(2020,9,1),Vol = 0.301 },
                new VarietyVol{ VarietyId = 1,ValueDate = new DateTime(2020,9,3),Vol = 0.311 },
                new VarietyVol{ VarietyId = 1,ValueDate = new DateTime(2020,9,13),Vol = 0.331 },

                new VarietyVol{ VarietyId = 2,ValueDate = new DateTime(2020,9,21),Vol = 0.401 },
                new VarietyVol{ VarietyId = 2,ValueDate = new DateTime(2020,9,22),Vol = 0.501 },
                new VarietyVol{ VarietyId = 2,ValueDate = new DateTime(2020,10,10),Vol = 0.601 },
            };

                foreach (var data in datas)
                {
                    data.OptId = 0;
                    data.OptName = "UnitTest";
                    data.OptDate = DateTime.Now;
                }

                db.variety_vol.AddRange(datas);
                db.SaveChanges();
            }
        }

        [TestMethod]
        public void TestGetVols()
        {
            var dates = new[] { new DateTime(2020, 9, 10), new DateTime(2020, 9, 22) };
            var check = new[] {
                new Action<VarietyVolDto[]>(n=>{
                    Assert.IsTrue(n.Length == 1);
                    Assert.IsTrue(n[0].Vol == 0.311);
                    Assert.IsTrue(n[0].ValueDate == new DateTime(2020, 9, 3));
                }),
                new Action<VarietyVolDto[]>(n=>{
                    Assert.IsTrue(n.Length == 2);
                    Assert.IsTrue(n[0].Vol == 0.331);
                    Assert.IsTrue(n[0].ValueDate == new DateTime(2020, 9, 13));

                    Assert.IsTrue(n[1].Vol == 0.501);
                    Assert.IsTrue(n[1].ValueDate == new DateTime(2020, 9, 22));
                }),
            };

            for (var i = 0; i < dates.Length; i++)
            {
                var date = dates[i];

                var grpQry = from vol in DbContext.variety_vol
                             where vol.ValueDate <= date
                             group vol by vol.VarietyId into grp
                             select new
                             {
                                 VarietyId = grp.Key,
                                 ValueDate = grp.Max(n => n.ValueDate)
                             };

                var qry = from gv in grpQry
                          join vol in DbContext.variety_vol on gv equals new { vol.VarietyId, vol.ValueDate }
                          orderby gv.VarietyId
                          select new VarietyVolDto
                          {
                              VarietyId = vol.VarietyId,
                              ValueDate = vol.ValueDate,
                              Vol = vol.Vol
                          };

                var qryDatas = qry.ToArray();

                check[i](qryDatas);
            }
        }

        [TestMethod]
        public void TestGetVols2()
        {
            var dates = new[] { new DateTime(2020, 9, 10), new DateTime(2020, 9, 22) };
            var check = new[] {
                new Action<VarietyVolDto[]>(n=>{
                    Assert.IsTrue(n.Length == 3);
                    Assert.IsTrue(n[0].Vol == 0.311);
                    Assert.IsTrue(n[0].ValueDate == new DateTime(2020, 9, 3));

                    Assert.IsTrue(n[1].Vol == 0.3);
                    Assert.IsTrue(n[1].ValueDate == new DateTime(2020, 9, 10));

                    Assert.IsTrue(n[2].Vol == 0.3);
                    Assert.IsTrue(n[2].ValueDate == new DateTime(2020, 9, 10));
                }),
                new Action<VarietyVolDto[]>(n=>{
                    Assert.IsTrue(n.Length == 3);
                    Assert.IsTrue(n[0].Vol == 0.331);
                    Assert.IsTrue(n[0].ValueDate == new DateTime(2020, 9, 13));

                    Assert.IsTrue(n[1].Vol == 0.501);
                    Assert.IsTrue(n[1].ValueDate == new DateTime(2020, 9, 22));

                     Assert.IsTrue(n[2].Vol == 0.3);
                    Assert.IsTrue(n[2].ValueDate == new DateTime(2020, 9, 22));
                }),
            };

            for (var i = 0; i < dates.Length; i++)
            {
                var date = dates[i];

                var qryDatas = new VarietyVolService(this).GetVols(date, new[] { 1, 2, 3 });

                check[i](qryDatas.ToArray());
            }
        }

        [TestMethod]
        public void TestGetVols3()
        {
            var provider = new VarietyVolProvider(new DateTime(2020, 9, 22));

            Assert.IsTrue(provider.TryGetVol(1, out var vol1)&&vol1 == 0.331);

            Assert.IsTrue(provider.TryGetVol(5, out var vol11)&&vol11 == 0.3);

            Assert.IsTrue(provider.TryGetVol("RB00", out var vol2) && vol2 == 0.501);

            Assert.IsTrue(provider.TryGetVol("ceshi1", out var vol3) && vol3 == 0.3);
        }
    }
}