using System;
using System.IO;
using UnityEngine;

namespace YooAsset
{
    // 文件偏移加密方式的示例代码
    public class FileOffsetEncryption : IEncryptionServices
    {
        public EncryptResult Encrypt(EncryptFileInfo fileInfo)
        {
            if (fileInfo.BundleName.Contains("dressup")
                || fileInfo.BundleName.Contains("dll")
                || fileInfo.BundleName.Contains("card"))
            {
                Debug.Log($"Encrypt {fileInfo.BundleName}");
                int offset = 30;
                byte[] fileData = File.ReadAllBytes(fileInfo.FilePath);
                var encryptedData = new byte[fileData.Length + offset];
                Buffer.BlockCopy(fileData, 0, encryptedData, offset, fileData.Length);

                EncryptResult result = new EncryptResult();
                result.LoadMethod = EBundleLoadMethod.LoadFromFileOffset;
                result.EncryptedData = encryptedData;
                return result;
            }
            else
            {
                EncryptResult result = new EncryptResult();
                result.LoadMethod = EBundleLoadMethod.Normal;
                return result;
            }
        }
    }
}