using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics.CodeAnalysis;
using ProjectGasolineTanker.Drawings;
using ProjectGasolineTanker.Entities;

namespace ProjectGasolineTanker.Generics
{
    internal class DrawingTruckEqutables : IEqualityComparer<DrawingTruck?>
    {
        public bool Equals(DrawingTruck? x, DrawingTruck? y)
        {
            if (x == null && x.EntityTruck == null)
                throw new ArgumentNullException(nameof(x));

            if (y == null && y.EntityTruck == null)
                throw new ArgumentNullException(nameof(y));

            if ((x.GetType().Name != y.GetType().Name))
                return false;

            if (x.EntityTruck.Speed != y.EntityTruck.Speed)
                return false;

            if (x.EntityTruck.Weight != y.EntityTruck.Weight)
                return false;

            if (x.EntityTruck.BodyColor != y.EntityTruck.BodyColor)
                return false;

            if (x is DrawingGasolineTanker && y is DrawingGasolineTanker)
            {
                var xGasTruck = (EntityGasolineTanker)x.EntityTruck;
                var yGasTruck = (EntityGasolineTanker)y.EntityTruck;
                
                if (xGasTruck.Add_Color != yGasTruck.Add_Color)
                    return false;

                if (xGasTruck.IsTank != yGasTruck.IsTank)
                    return false;

                if (xGasTruck.IsWheel != yGasTruck.IsWheel)
                    return false;
            }
            return true;
        }

        public int GetHashCode([DisallowNull] DrawingTruck? obj)
        {
            return obj.GetHashCode();
        }

    }
}