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

namespace SixLabors.ImageSharp.Drawing.Processing {
  /// <summary>
  /// Provides a set of configurations options for pens.
  /// </summary>
  public struct PenOptions
  {
      /// <summary>
      /// Initializes a new instance of the <see cref="PenOptions"/> struct.
      /// </summary>
      /// <param name="strokeWidth">The stroke width in the path's local coordinate space before any drawing transform is applied.</param>
      public PenOptions(float strokeWidth)
          : this(Color.Black, strokeWidth)
      {
      }

      /// <summary>
      /// Initializes a new instance of the <see cref="PenOptions"/> struct.
      /// </summary>
      /// <param name="color">The color.</param>
      /// <param name="strokeWidth">The stroke width in the path's local coordinate space before any drawing transform is applied.</param>
      public PenOptions(Color color, float strokeWidth)
          : this(color, strokeWidth, null)
      {
      }

      /// <summary>
      /// Initializes a new instance of the <see cref="PenOptions"/> struct.
      /// </summary>
      /// <param name="color">The color.</param>
      /// <param name="strokeWidth">The stroke width in the path's local coordinate space before any drawing transform is applied.</param>
      /// <param name="strokePattern">The stroke pattern.</param>
      public PenOptions(Color color, float strokeWidth, float[]? strokePattern)
          : this(new SolidBrush(color), strokeWidth, strokePattern)
      {
      }

      /// <summary>
      /// Initializes a new instance of the <see cref="PenOptions"/> struct.
      /// </summary>
      /// <param name="strokeFill">The brush used to fill the stroke outline.</param>
      /// <param name="strokeWidth">The stroke width in the path's local coordinate space before any drawing transform is applied.</param>
      /// <param name="strokePattern">The stroke pattern.</param>
      public PenOptions(Brush strokeFill, float strokeWidth, float[]? strokePattern)
      {
          Guard.MustBeGreaterThan(strokeWidth, 0, nameof(strokeWidth));

          this.StrokeFill = strokeFill;
          this.StrokeWidth = strokeWidth;
          this.StrokePattern = strokePattern ?? Pens.EmptyPattern;
          this.StrokeOptions = new StrokeOptions();
      }

      /// <summary>
      /// Gets the brush used to fill the stroke outline. Defaults to <see cref="SolidBrush"/>.
      /// </summary>
      public Brush StrokeFill { get; }

      /// <summary>
      /// Gets the stroke width in the path's local coordinate space before any drawing transform is applied. Defaults to 1.
      /// </summary>
      public float StrokeWidth { get; }

      /// <summary>
      /// Gets the stroke pattern.
      /// </summary>
      public float[] StrokePattern { get; }

      /// <summary>
      /// Gets or sets the stroke geometry options used to stroke paths drawn with this pen.
      /// </summary>
      public StrokeOptions? StrokeOptions { get; set; }
  }
}