using MasstransferCommon.Model.Entity;
using MasstransferInfrastructure.Database.Sqlite;
using Minio;
using Minio.DataModel.Args;

namespace MasstransferCommunicate.Minio;

/// <summary>
/// Minio工具类
/// </summary>
public class MinioHelper
{
    private readonly IMinioClient _client;

    private static MinioHelper? _instance;

    private static readonly object Lock = new();

    private static SqliteHelper _sqliteHelper = SqliteHelper.GetInstance();

    private MinioHelper(string endpoint, string accessKey, string secretKey)
    {
        _client = new MinioClient()
            .WithSSL()
            .WithEndpoint(endpoint)
            .WithCredentials(accessKey, secretKey)
            .Build();
    }

    public static MinioHelper GetInstance()
    {
        lock (Lock)
        {
            var minio = _sqliteHelper.Query<MinioParams>("select * from minio_params limit 1").FirstOrDefault();
            _instance ??= new MinioHelper(minio.MinioEndpoint, minio.MinioAccessKey, minio.MinioSecretKey);
            return _instance;
        }
    }

    /// <summary>
    /// 判断bucket 是否存在
    /// </summary>
    /// <param name="bucketName"></param>
    /// <returns></returns>
    public async Task<bool> BucketExistsAsync(string bucketName)
    {
        return await _client.BucketExistsAsync(new BucketExistsArgs().WithBucket(bucketName));
    }

    /// <summary>
    /// 上传文件
    /// </summary>
    /// <param name="bucketName"></param>
    /// <param name="fileName"></param>
    /// <param name="filePath"></param>
    /// <returns></returns>
    public async Task<string> UploadFileAsync(string bucketName, string fileName, string filePath)
    {
        try
        {
            if (!await BucketExistsAsync(bucketName))
            {
                await _client.MakeBucketAsync(new MakeBucketArgs().WithBucket(bucketName));
            }

            await _client.PutObjectAsync(new PutObjectArgs()
                .WithBucket(bucketName)
                .WithObject(fileName)
                .WithFileName(filePath));

            Console.WriteLine("文件上传成功");

            return $"{bucketName}/{fileName}";
        }
        catch (Exception e)
        {
            Console.WriteLine($"文件上传失败: {e}");
            return "";
        }
    }

    /// <summary>
    /// 下载文件
    /// </summary>
    /// <param name="bucketName"></param>
    /// <param name="fileName"></param>
    /// <param name="filePath"></param>
    public async Task DownloadFileAsync(string bucketName, string fileName, string filePath)
    {
        if (!await BucketExistsAsync(bucketName))
        {
            await _client.MakeBucketAsync(new MakeBucketArgs().WithBucket(bucketName));
        }

        await _client.GetObjectAsync(new GetObjectArgs()
            .WithBucket(bucketName)
            .WithObject(fileName)
            .WithFile(filePath));
    }

    /// <summary>
    /// 删除文件
    /// </summary>
    /// <param name="bucketName"></param>
    /// <param name="fileName"></param>
    public async Task DeleteFileAsync(string bucketName, string fileName)
    {
        if (!await BucketExistsAsync(bucketName))
        {
            await _client.MakeBucketAsync(new MakeBucketArgs().WithBucket(bucketName));
        }

        await _client.RemoveObjectAsync(new RemoveObjectArgs()
            .WithBucket(bucketName)
            .WithObject(fileName));
    }
}