// Copyright (c) Six Labors.
// Licensed under the Six Labors Split License.

using System.Numerics;

namespace SixLabors.ImageSharp.Drawing.Processing {
  /// <summary>
  /// Provides options for influencing drawing operations, combining graphics rendering settings,
  /// shape fill-rule behavior, and an optional coordinate transform.
  /// </summary>
  public class DrawingOptions
  {
      private GraphicsOptions graphicsOptions;
      private ShapeOptions shapeOptions;

      /// <summary>
      /// Initializes a new instance of the <see cref="DrawingOptions"/> class.
      /// </summary>
      public DrawingOptions()
      {
          this.graphicsOptions = new GraphicsOptions();
          this.shapeOptions = new ShapeOptions();
          this.Transform = Matrix4x4.Identity;
      }

      internal DrawingOptions(
          GraphicsOptions graphicsOptions,
          ShapeOptions shapeOptions,
          Matrix4x4 transform)
      {
          DebugGuard.NotNull(graphicsOptions, nameof(graphicsOptions));
          DebugGuard.NotNull(shapeOptions, nameof(shapeOptions));

          this.graphicsOptions = graphicsOptions;
          this.shapeOptions = shapeOptions;
          this.Transform = transform;
      }

      /// <summary>
      /// Gets or sets the graphics rendering options that control antialiasing, blending, alpha composition,
      /// and coverage thresholding for the drawing operation.
      /// </summary>
      public GraphicsOptions GraphicsOptions
      {
          get => this.graphicsOptions;
          set
          {
              Guard.NotNull(value, nameof(this.GraphicsOptions));
              this.graphicsOptions = value;
          }
      }

      /// <summary>
      /// Gets or sets the shape options that control fill-rule intersection mode and boolean clipping behavior.
      /// </summary>
      public ShapeOptions ShapeOptions
      {
          get => this.shapeOptions;
          set
          {
              Guard.NotNull(value, nameof(this.ShapeOptions));
              this.shapeOptions = value;
          }
      }

      /// <summary>
      /// Gets or sets the transform matrix applied to vector output before rasterization.
      /// For strokes, the pen is expanded in local geometry space and the resulting outline is transformed before rasterization.
      /// Defaults to <see cref="Matrix4x4.Identity"/>.
      /// </summary>
      public Matrix4x4 Transform { get; set; }
  }
}