using System;
using System.Drawing;

namespace BoxPacker3D
{
    public class Box
    {
        public double W { get; set; }
        public double H { get; set; }
        public double D { get; set; }
        /// <summary>Thickness of the cardboard/material wall in the same units (mm).</summary>
        public double WallThickness { get; set; }

        public Box(double w, double h, double d, double wallThickness = 0)
        {
            W = w; H = h; D = d; WallThickness = wallThickness;
        }

        /// <summary>Outer volume.</summary>
        public double Volume => W * H * D;
        /// <summary>Usable interior volume (after subtracting wall thickness on all 6 sides).</summary>
        public double InnerVolume
        {
            get
            {
                double iw = Math.Max(0, W - 2 * WallThickness);
                double ih = Math.Max(0, H - 2 * WallThickness);
                double id = Math.Max(0, D - 2 * WallThickness);
                return iw * ih * id;
            }
        }
    }

    public class Item
    {
        public string Name { get; set; }
        public double W { get; set; }
        public double H { get; set; }
        public double D { get; set; }
        public Color Color { get; set; }

        public Item(string name, double w, double h, double d, Color color)
        {
            Name = name; W = w; H = h; D = d; Color = color;
        }

        public double Volume => W * H * D;

        public bool FitsInBox(Box box)
        {
            // Check allowed rotations (horizontal only - height preserved)
            double[] dims = { W, H, D };
            var rotations = GetRotations();
            foreach (var r in rotations)
                if (r[0] <= box.W && r[1] <= box.H && r[2] <= box.D)
                    return true;
            return false;
        }

        public double[][] GetRotations(bool preferRotated = false)
        {
            var orig = new[] { W, H, D };
            var rot  = new[] { D, H, W };
            return preferRotated
                ? new double[][] { rot, orig }
                : new double[][] { orig, rot };
        }
    }

    public class ItemType
    {
        public string Name { get; set; }
        public double W { get; set; }
        public double H { get; set; }
        public double D { get; set; }
        public int Count { get; set; }
        public Color Color { get; set; }
    }

    public class PackedItem
    {
        public Item Item { get; set; }
        public double X { get; set; }
        public double Y { get; set; }
        public double Z { get; set; }
        // Actual dimensions used (after rotation)
        public double RW { get; set; }
        public double RH { get; set; }
        public double RD { get; set; }

        public PackedItem(Item item, double x, double y, double z, double rw, double rh, double rd)
        {
            Item = item; X = x; Y = y; Z = z; RW = rw; RH = rh; RD = rd;
        }
    }
}