using Xunit;
using System;
using QuanTAlib;

namespace Basics;
#nullable disable
public class Indicators
{
  private static Type[] maSeriesTypes = new Type[]
  {
    typeof(SMA_Series),
    typeof(EMA_Series),
    typeof(DEMA_Series),
    typeof(TEMA_Series),
    typeof(WMA_Series),
    typeof(ALMA_Series),
    typeof(DWMA_Series),
    typeof(FWMA_Series),
    typeof(HMA_Series),
    typeof(ZLEMA_Series),
    typeof(RMA_Series),
    typeof(HEMA_Series),
    typeof(JMA_Series),
    typeof(CUSUM_Series),
    typeof(SMMA_Series),
    typeof(T3_Series),
    typeof(KAMA_Series),
    typeof(TRIMA_Series),
};

  [Theory]
  [MemberData(nameof(MASeriesData))]
  public void Name_exists(Type classType)
  {
    TSeries data = new("Data") {1,2,3};

    var MA_Series = Activator.CreateInstance(classType, data, 5, false) as TSeries;
    Assert.NotEmpty(MA_Series.Name);
  }

  [Theory]
  [MemberData(nameof(MASeriesData))]
  public void Series_Length(Type classType)
  {
    GBM_Feed feed = new(1000);
    TSeries data = feed.OHLC4;

    var MA_Series = Activator.CreateInstance(classType, data, 5, false) as TSeries;
    Assert.Equal(1000, MA_Series.Count);
  }

  [Theory]
  [MemberData(nameof(MASeriesData))]
  public void Return_data(Type classType)
  {
    TSeries data = new() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

    var MA_Series = Activator.CreateInstance(classType, data, 5, false) as TSeries;
    var result = MA_Series.Add(20);
    Assert.Equal(result.v, MA_Series.Last.v);
  }

  [Theory]
  [MemberData(nameof(MASeriesData))]
  public void Update(Type classType)
  {
    TSeries data = new() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

    var MA_Series = Activator.CreateInstance(classType, data, 5, false) as TSeries;
    var pre_update = MA_Series.Last.v;

    double pre_data = data.Last.v;
    data.Add(20, true);
    data.Add(pre_data, true);

    Assert.Equal(pre_update, MA_Series.Last.v);
    Assert.Equal(data.Count, MA_Series.Count);
}

  [Theory]
  [MemberData(nameof(MASeriesData))]
  public void Period_zero(Type classType)
  {
    GBM_Feed feed = new(100);
    TSeries data = feed.OHLC4;

    var MA_Series = Activator.CreateInstance(classType, data, 0, false) as TSeries;
    Assert.Equal(data.Count, MA_Series.Count);
    Assert.False(double.IsNaN(MA_Series.Last.v));
  }

	[Theory]
  [MemberData(nameof(MASeriesData))]
  public void Reset(Type classType)
  {
    GBM_Feed feed = new(10);
    TSeries data = feed.OHLC4;
    var MA_Series = Activator.CreateInstance(classType, data, 10, false) as TSeries;
    MA_Series.Reset();
    data.Add(0);
    Assert.Equal(data.Last.v, MA_Series.Last.v);
  }

  [Theory]
  [MemberData(nameof(MASeriesData))]
	public void Period_one(Type classType)
  {
    GBM_Feed feed = new(100);
    TSeries data = feed.OHLC4;

    var MA_Series = Activator.CreateInstance(classType, data, 1, false) as TSeries;
    Assert.InRange(MA_Series.Last.v - data.Last.v, -10e-6, 10e-6);
  }

  [Theory]
  [MemberData(nameof(MASeriesData))]
  public void NaN_test(Type classType)
  {
    GBM_Feed feed = new(100);
    TSeries data = feed.OHLC4;

    var MA_Series = Activator.CreateInstance(classType, data, 10, true) as TSeries;
    Assert.True(double.IsNaN(MA_Series[0].v));
    Assert.True(double.IsNaN(MA_Series[8].v));
    Assert.False(double.IsNaN(MA_Series[9].v));
  }

  [Theory]
  [MemberData(nameof(MASeriesData))]
  public void Edge_numbers(Type classType)
  {
    TSeries data = new() { double.Epsilon, double.PositiveInfinity, double.MaxValue, double.NegativeInfinity };
    var MA_Series = Activator.CreateInstance(classType, data, 10, true) as TSeries;
    Assert.Equal(4, MA_Series.Count);
  }

  [Theory]
  [MemberData(nameof(MASeriesData))]
  public void handling_NaN(Type classType) {
	  TSeries data = new("Name") { 1, 2, 3, 4, 5, 6, double.NaN, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 };
var MA_Series = Activator.CreateInstance(classType, data, 10, true) as TSeries;
	  Assert.False(double.IsNaN(MA_Series.Last.v));
  }

public static IEnumerable<object[]> MASeriesData()
  {
    foreach (var type in maSeriesTypes)
    {
      yield return new object[] { type };
    }
  }
}
#nullable restore