using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics.CodeAnalysis;
using ContainerShip.Entities;
using ContainerShip.DrawningObjects;

namespace ContainerShip.Generic
{
    internal class DrawningShipEqutables : IEqualityComparer<DrawningShip?>
    {
        public bool Equals(DrawningShip? x, DrawningShip? y)
        {
            if (x == null && x.EntityShip == null)
                throw new ArgumentNullException(nameof(x));

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

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

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

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

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

            if (x is DrawingContainerShip && y is DrawingContainerShip)
            {
                var xPlane = (EntityContainerShip)x.EntityShip;
                var yPlane = (EntityContainerShip)y.EntityShip;

                if (xPlane.AdditionalColor != yPlane.AdditionalColor)
                    return false;

                if (xPlane.Load != yPlane.Load)
                    return false;

                if (xPlane.Crane != yPlane.Crane)
                    return false;
            }
            return true;
        }

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