using OSCADSharp.Spatial;
using OSCADSharp.Utility;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OSCADSharp
{
    public abstract partial class OSCADObject
    {
        #region ColoredObject
        /// <summary>
        /// An OSCADObject that has color and/or opacity applied to it
        /// </summary>
        private class ColoredObject : SingleStatementObject
        {
            #region Attributes
            internal string ColorName { get; set; } = "Yellow";
            internal double Opacity { get; set; } = 1.0;
            #endregion

            /// <summary>
            /// Creates a colorized object
            /// </summary>
            /// <param name="obj">The object(s) to which color will be applied</param>
            /// <param name="color">The string-wise name of the color to be applied</param>
            /// <param name="opacity">Opacity from 0.0 to 1.0 </param>
            internal ColoredObject(OSCADObject obj, string color = "Yellow", double opacity = 1.0) : base(obj)
            {
                this.ColorName = color;
                this.Opacity = opacity;
            }            

            public override string ToString()
            {
                string colorName;
                if (!this.ColorName.StartsWith("["))
                {
                    colorName =  "\"" + this.ColorName + "\"";
                }
                else {
                    colorName = this.ColorName;
                }                
                string opacity = this.Opacity.ToString();

                string colorCommand = String.Format("color({0}, {1})", colorName, opacity);
                var formatter = new SingleBlockFormatter(colorCommand, this.obj.ToString());
                return formatter.ToString();
            }

            public override OSCADObject Clone()
            {
                return new ColoredObject(this.obj.Clone(), this.ColorName, this.Opacity)
                {
                    Name = this.Name
                };
            }

            public override Vector3 Position()
            {
                return this.obj.Position();
            }

            public override Bounds Bounds()
            {
                return this.obj.Bounds();
            }
            
        }
        #endregion

        #region ResizedObject
        /// <summary>
        /// An OSCADObject that's been resized to a specified set of X/Y/Z dimensions
        /// </summary>
        private class ResizedObject : SingleStatementObject
        {
            /// <summary>
            /// Size of the object in terms of X/Y/Z
            /// </summary>
            internal Vector3 Size { get; set; }
            
            internal ResizedObject(OSCADObject obj) : base(obj)
            {
            }

            /// <summary>
            /// Creates a resized object
            /// </summary>
            /// <param name="obj">The object(s) to be resized</param>
            /// <param name="size">The size to resize to, in terms of x/y/z dimensions</param>
            internal ResizedObject(OSCADObject obj, Vector3 size) : base(obj)
            {
                Size = size;
            }

            public override string ToString()
            {
                string size = this.Size.ToString();

                string resizeCommand = String.Format("resize({0})", size);
                var formatter = new SingleBlockFormatter(resizeCommand, this.obj.ToString());
                return formatter.ToString();
            }

            public override OSCADObject Clone()
            {

                return new ResizedObject(this.obj.Clone())
                {
                    Name = this.Name,
                    Size =  this.Size.Clone()
                };
            }

            public override Vector3 Position()
            {
                var bounds = this.Bounds();
                return Vector3.Average(bounds.BottomLeft, bounds.TopRight);
            }

            public override Bounds Bounds()
            {
                var oldBounds = obj.Bounds();

                double xScaleFactor = this.Size.X > 0 ? this.Size.X / Math.Abs(oldBounds.XMax - oldBounds.XMin) : 1;
                double yScaleFactor = this.Size.Y > 0 ? this.Size.Y / Math.Abs(oldBounds.YMax - oldBounds.YMin) : 1;
                double zScaleFactor = this.Size.Z > 0 ? this.Size.Z / Math.Abs(oldBounds.ZMax - oldBounds.ZMin) : 1;
                Vector3 scaleMultiplier = new Vector3(xScaleFactor, yScaleFactor, zScaleFactor);

                return new Bounds(oldBounds.BottomLeft * scaleMultiplier, oldBounds.TopRight * scaleMultiplier);
            }
        }
        #endregion

        #region RotatedObject
        /// <summary>
        /// An OSCADObject with rotation applied
        /// </summary>
        private class RotatedObject : SingleStatementObject
        {
            /// <summary>
            /// The angle to rotate, in terms of X/Y/Z euler angles
            /// </summary>
            internal Vector3 Angle { get; set; } = new Vector3();

            /// <summary>
            /// Creates an object with rotation applied
            /// </summary>
            /// <param name="obj">The object being rotated</param>
            /// <param name="angle">The angle to rotate</param>
            internal RotatedObject(OSCADObject obj, Vector3 angle) : base(obj)
            {
                this.Angle = angle;
            }

            public override string ToString()
            {
                string angle = this.Angle.ToString();

                string rotateCommand = String.Format("rotate({0})", angle.ToString());
                var formatter = new SingleBlockFormatter(rotateCommand, this.obj.ToString());
                return formatter.ToString();
            }

            public override OSCADObject Clone()
            {
                return new RotatedObject(this.obj.Clone(), this.Angle)
                {
                    Name = this.Name
                };
            }

            public override Vector3 Position()
            {
                return Matrix.GetRotatedPoint(this.obj.Position(), this.Angle.X, this.Angle.Y, this.Angle.Z);
            }

            public override Bounds Bounds()
            {
                var oldBounds = obj.Bounds();
                return new Bounds(Matrix.GetRotatedPoint(oldBounds.BottomLeft, this.Angle.X, this.Angle.Y, this.Angle.Z),
                                  Matrix.GetRotatedPoint(oldBounds.TopRight, this.Angle.X, this.Angle.Y, this.Angle.Z));
            }
        }

        #endregion

        #region ScaledObject
        /// <summary>
        /// An object that's been rescaled
        /// </summary>
        private class ScaledObject : SingleStatementObject
        {
            /// <summary>
            /// The scale factor to be applied
            /// </summary>
            internal Vector3 ScaleFactor { get; set; } = new Vector3(1, 1, 1);

            /// <summary>
            /// Creates a scaled object
            /// </summary>
            /// <param name="obj">Object(s) to be scaled</param>
            /// <param name="scale">Scale factor in x/y/z components</param>
            internal ScaledObject(OSCADObject obj, Vector3 scale) : base(obj)
            {
                this.ScaleFactor = scale;
            }

            public override string ToString()
            {
                string scale = this.ScaleFactor.ToString();

                string scaleCommand = String.Format("scale(v = {0})", scale);
                var formatter = new SingleBlockFormatter(scaleCommand, this.obj.ToString());
                return formatter.ToString();
            }

            public override OSCADObject Clone()
            {
                return new ScaledObject(this.obj.Clone(), this.ScaleFactor)
                {
                    Name = this.Name
                };
            }

            public override Vector3 Position()
            {
                return obj.Position() * this.ScaleFactor;
            }

            public override Bounds Bounds()
            {
                var oldBounds = obj.Bounds();
                return new Bounds(oldBounds.BottomLeft * this.ScaleFactor, oldBounds.TopRight * this.ScaleFactor);
            }
        }


        #endregion

        #region TranslatedObject
        /// <summary>
        /// An OSCADObject or objects that have been moved along the specified vector
        /// </summary>
        private class TranslatedObject : SingleStatementObject
        {
            internal Vector3 Vector { get; set; }

            /// <summary>
            /// Creates a translated object
            /// </summary>
            /// <param name="obj">Object(s) to translate</param>
            /// <param name="vector">Amount to translate by</param>
            internal TranslatedObject(OSCADObject obj, Vector3 vector) : base(obj)
            {
                this.Vector = vector;
            }
            
            internal TranslatedObject(OSCADObject obj) : base(obj)
            {
            }

            public override string ToString()
            {
                string translation = this.Vector.ToString();

                string translateCommmand = String.Format("translate(v = {0})", translation);
                var formatter = new SingleBlockFormatter(translateCommmand, this.obj.ToString());
                return formatter.ToString();
            }

            public override OSCADObject Clone()
            {
                var clone = new TranslatedObject(this.obj.Clone())
                {
                    Name = this.Name,
                    Vector = this.Vector.Clone()
                };

                return clone;
            }

            public override Vector3 Position()
            {
                return this.obj.Position() + this.Vector;
            }

            public override Bounds Bounds()
            {
                var oldBounds = obj.Bounds();
                return new Bounds(oldBounds.BottomLeft + this.Vector, oldBounds.TopRight + this.Vector);
            }
        }
        #endregion
    }
}