using System.Collections.Generic;
using System.IO;

namespace TakeoutSaaS.Module.Storage.Models;

/// <summary>
/// 对象存储上传请求参数。
/// </summary>
public sealed class StorageUploadRequest
{
    /// <summary>
    /// 初始化上传请求。
    /// </summary>
    /// <param name="objectKey">对象键（含路径）。</param>
    /// <param name="content">文件流。</param>
    /// <param name="contentType">内容类型。</param>
    /// <param name="contentLength">内容长度。</param>
    /// <param name="generateSignedUrl">是否返回签名访问链接。</param>
    /// <param name="signedUrlExpires">签名有效期。</param>
    /// <param name="metadata">附加元数据。</param>
    public StorageUploadRequest(
        string objectKey,
        Stream content,
        string contentType,
        long contentLength,
        bool generateSignedUrl,
        TimeSpan signedUrlExpires,
        IDictionary<string, string>? metadata = null)
    {
        ObjectKey = objectKey;
        Content = content;
        ContentType = contentType;
        ContentLength = contentLength;
        GenerateSignedUrl = generateSignedUrl;
        SignedUrlExpires = signedUrlExpires;
        Metadata = metadata == null
            ? new Dictionary<string, string>()
            : new Dictionary<string, string>(metadata);
    }

    /// <summary>
    /// 对象键。
    /// </summary>
    public string ObjectKey { get; }

    /// <summary>
    /// 文件流。
    /// </summary>
    public Stream Content { get; }

    /// <summary>
    /// 内容类型。
    /// </summary>
    public string ContentType { get; }

    /// <summary>
    /// 内容长度。
    /// </summary>
    public long ContentLength { get; }

    /// <summary>
    /// 是否需要签名访问链接。
    /// </summary>
    public bool GenerateSignedUrl { get; }

    /// <summary>
    /// 签名有效期。
    /// </summary>
    public TimeSpan SignedUrlExpires { get; }

    /// <summary>
    /// 元数据集合。
    /// </summary>
    public IReadOnlyDictionary<string, string> Metadata { get; }
}