using IM_API.Dtos;
using IM_API.Models.Upload;
using IM_API.VOs;

namespace IM_API.Interface.Services
{
    public interface IStorageService
    {
        string ProviderName { get; }
        UploadMode Mode { get; }
        /// <summary>
        /// 初始化上传任务
        /// </summary>
        /// <param name="dto"></param>
        /// <returns></returns>
        Task<CreateUploadTaskVo> InitTaskAsync(CreateUploadTaskDto dto);
        /// <summary>
        /// 创建分片任务
        /// </summary>
        /// <param name="taskId">文件上传任务ID</param>
        /// <param name="partNumer"></param>
        /// <returns></returns>
        Task<UploadPartInstructionVo> CreatePartInstructionAsync(Guid taskId, int partNumer);
        Task<Guid> CompleteAsync(
        Guid taskId,
        List<UploadPartDto> parts
    );

        Task MergeAsync(Guid taskId, string objectName, int totalChunks, List<UploadPartDto> parts);

        Task<UploadTask> UploadSmallFileAsync(Stream stream, string fileName, string fileType, long size, string hash);
        string GetDownloadUrl(string objectname); 
    }
    public enum UploadMode
    {
        Proxy,   // 本地 / 后端中转
        Direct   // 云直传
    }

}