// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX - License - Identifier: Apache - 2.0

using Amazon;
using Amazon.Runtime;
using Amazon.S3;
using Amazon.S3.Model;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace S3Demo.Helper
{
    // This example uses the AWS SDK for .NET to check isExist the Amazon Simple Storage
    // Service (Amazon S3) buckets belonging to the default account. This code
    // was written using AWS SDK for .NET v3.5 and .NET Core 5.0.
    class BucketModel
    {
        private static IAmazonS3 _s3Client;

        private static bool bucketFlag;

        #region 判断是否存在
        /// <summary>
        /// 判断存储桶是否存在
        /// </summary>
        /// <param name="bucketName">传入bucketName为 "test" , 而不是 "minio/test"</param>
        /// <param name="credentials"></param>
        /// <param name="conf"></param>
        /// <returns></returns>
        public static async Task<bool> isExistBucket(string bucketName, BasicAWSCredentials credentials, AmazonS3Config conf)
        {
            try
            {
                _s3Client = new AmazonS3Client(credentials, conf);
                var response = await _s3Client.ListBucketsAsync();
                List<S3Bucket> bucketList = response.Buckets;
                //bucketList.ForEach(b => Console.WriteLine($"Bucket name: {b.BucketName}, created on: {b.CreationDate}"));
                foreach (var item in bucketList)
                {
                    if (item.BucketName == bucketName)
                    {
                        bucketFlag = true;
                    }
                }
            }
            catch (AmazonS3Exception ex)
            {
                Console.WriteLine($"Error isExist bucket: '{ex.Message}'");
            }
            return bucketFlag;
        }
        #endregion

        #region 创建存储桶
        /// <summary>
        /// Uses Amazon SDK for .NET PutBucketAsync to create a new
        /// Amazon S3 bucket.
        /// </summary>
        /// <param name="client">The client object used to connect to Amazon S3.</param>
        /// <param name="bucketName">完整的桶路径,如: "minio/test"</param>
        public static async Task CreateBucket(string bucketName, BasicAWSCredentials credentials, AmazonS3Config conf)
        {
            try
            {
                _s3Client = new AmazonS3Client(credentials, conf);
                var putBucketRequest = new PutBucketRequest
                {
                    BucketName = bucketName
                    //UseClientRegion = true
                };

                var putBucketResponse = await _s3Client.PutBucketAsync(putBucketRequest);
                Console.WriteLine("Create bucket " + bucketName + " successffl!");
            }
            catch (AmazonS3Exception ex)
            {
                Console.WriteLine($"Error creating bucket: '{ex.Message}'");
            }
        }
        #endregion
    }
}