using System;
using System.Collections.Generic;
using Kreta.BusinessLogic.Classes;

namespace Kreta.BusinessLogic.HelperClasses
{
    public class TanuloOsztalyTantargyiAtlagCoComparer : IEqualityComparer<TanuloOsztalyTantargyiAtlagCo>
    {
        public bool Equals(TanuloOsztalyTantargyiAtlagCo lhs, TanuloOsztalyTantargyiAtlagCo rhs) => lhs.TantargyId == rhs.TantargyId;

        public int GetHashCode(TanuloOsztalyTantargyiAtlagCo obj) => obj.TantargyId.GetHashCode();
    }

    public class TanuloOsztalyTantargyiAtlagCo
    {
        public bool HasAtlag { get; set; } = true;

        public int TantargyId { get; set; }

        public string TantargyNev { get; set; }

        public List<(int Osztalyzat, int? Suly)> TanuloErtekelesOsztalyzatList { get; set; }

        public List<(int Osztalyzat, int? Suly)> OsztalyErtekelesOsztalyzatList { get; set; }

        public double? TanuloAtlag => HasAtlag ? TanuloErtekelesOsztalyzatList.Count > 0 ? TanuloErtekelesOsztalyzatList.WeightedAverage(x => x.Osztalyzat, x => x.Suly ?? 100, 2) : 0.00 : default(double?);

        public double? OsztalyAtlag => HasAtlag ? OsztalyErtekelesOsztalyzatList.Count > 0 ? OsztalyErtekelesOsztalyzatList.WeightedAverage(x => x.Osztalyzat, x => x.Suly ?? 100, 2) : 0.00 : default(double?);

        public double? AtlagKulonbseg => HasAtlag ? Math.Round(TanuloAtlag.Value - OsztalyAtlag.Value, 2) : default(double?);

        //NOTE: A tantárgyak sorrendezéséhez kellenek ezek az adatok!
        public int? FotargyId { get; set; }

        public string FotargyNev { get; set; }

        public int? TantargyKategoriaId { get; set; }

        public string TantargyKategoriaNev { get; set; }

        public string IsMagatartasSzorgalom { get; set; }

        public int? FotargyTantargyKategoriaId { get; set; }

        public string FotargyTantargyKategoriaNev { get; set; }
    }
}