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

using SixLabors.ImageSharp.Drawing.PolygonGeometry;
using SixLabors.ImageSharp.Drawing.Processing;
using System.Collections.Generic;

namespace SixLabors.ImageSharp.Drawing {
  /// <summary>
  /// Provides extension methods to <see cref="IPath"/> that allow the clipping of shapes.
  /// </summary>
  public static class ClipPathExtensions
  {
      private static readonly ShapeOptions DefaultOptions = new();

      /// <summary>
      /// Clips the specified subject path with the provided clipping paths.
      /// </summary>
      /// <param name="subjectPath">The subject path.</param>
      /// <param name="clipPaths">The clipping paths.</param>
      /// <returns>The clipped <see cref="IPath"/>.</returns>
      public static IPath Clip(this IPath subjectPath, params IPath[] clipPaths)
          => subjectPath.Clip(DefaultOptions, clipPaths);

      /// <summary>
      /// Clips the specified subject path with the provided clipping paths.
      /// </summary>
      /// <param name="subjectPath">The subject path.</param>
      /// <param name="options">The shape options.</param>
      /// <param name="clipPaths">The clipping paths.</param>
      /// <returns>The clipped <see cref="IPath"/>.</returns>
      public static IPath Clip(
          this IPath subjectPath,
          ShapeOptions options,
          params IPath[] clipPaths)
          => ClippedShapeGenerator.GenerateClippedShapes(options.BooleanOperation, subjectPath, clipPaths);

      /// <summary>
      /// Clips the specified subject path with the provided clipping paths.
      /// </summary>
      /// <param name="subjectPath">The subject path.</param>
      /// <param name="clipPaths">The clipping paths.</param>
      /// <returns>The clipped <see cref="IPath"/>.</returns>
      public static IPath Clip(this IPath subjectPath, IEnumerable<IPath> clipPaths)
          => subjectPath.Clip(DefaultOptions, clipPaths);

      /// <summary>
      /// Clips the specified subject path with the provided clipping paths.
      /// </summary>
      /// <param name="subjectPath">The subject path.</param>
      /// <param name="options">The shape options.</param>
      /// <param name="clipPaths">The clipping paths.</param>
      /// <returns>The clipped <see cref="IPath"/>.</returns>
      public static IPath Clip(
          this IPath subjectPath,
          ShapeOptions options,
          IEnumerable<IPath> clipPaths)
          => ClippedShapeGenerator.GenerateClippedShapes(options.BooleanOperation, subjectPath, clipPaths);
  }
}