using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore;
namespace Admin.NET.Core;
public class CustomFormFile : IFormFile
{
    private readonly Stream _stream;

    public CustomFormFile(byte[] fileContents, string fileName, string contentType, string name)
    {
        _stream = new MemoryStream(fileContents);
        FileName = fileName;
        ContentType = contentType;
        Length = fileContents.Length;
        Name = name;
        Headers = new HeaderDictionary(); // 初始化 Headers
        ContentDisposition = $"form-data; name=\"{name}\"; filename=\"{fileName}\""; // 初始化 ContentDisposition
    }

    public string ContentDisposition { get; }

    public string ContentType { get; }

    public string FileName { get; }

    public bool Exists => true;

    public long Length { get; }

    public string Name { get; }

    public IHeaderDictionary Headers { get; }

    public Stream OpenReadStream() => _stream;

    public Task CopyToAsync(Stream target, CancellationToken cancellationToken = default)
    {
        _stream.Seek(0, SeekOrigin.Begin); // Reset the stream position
        return _stream.CopyToAsync(target, 81920, cancellationToken);
    }

    public void CopyTo(Stream target)
    {
        _stream.Seek(0, SeekOrigin.Begin); // Reset the stream position
        _stream.CopyTo(target);
    }
}