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

using System.Diagnostics;
using System.Text;

namespace SixLabors.Fonts.Utilities {
  [DebuggerDisplay("Offset: {Offset}, Length: {Length}, Value: {Value}")]
  internal class StringLoader
  {
      public StringLoader(ushort length, ushort offset, Encoding encoding)
      {
          this.Length = length;
          this.Offset = offset;
          this.Encoding = encoding;
          this.Value = string.Empty;
      }

      public ushort Length { get; }

      public ushort Offset { get; }

      public string Value { get; private set; }

      public Encoding Encoding { get; }

      public static StringLoader Create(BigEndianBinaryReader reader)
          => Create(reader, Encoding.BigEndianUnicode);

      public static StringLoader Create(BigEndianBinaryReader reader, Encoding encoding)
          => new StringLoader(reader.ReadUInt16(), reader.ReadUInt16(), encoding);

      public void LoadValue(BigEndianBinaryReader reader)
          => this.Value = reader.ReadString(this.Length, this.Encoding).Replace("\0", string.Empty);
  }
}