using Amazon.Runtime;
using Amazon.S3;
using Amazon.S3.Model;

namespace qtc_api.Services.BucketService
{
    public class BucketService : IBucketService
    {
        public string ServiceUrl { get; private set; } = string.Empty;
        public string AccessKey { get; private set; } = string.Empty;
        public string SecretKey { get; private set; } = string.Empty;
        public string ProfileImagesBucketName { get; private set; } = string.Empty;
        public string CDNBucketName { get; private set; } = string.Empty;
        public string ImagesBucketName { get; private set; } = string.Empty;

        private static AmazonS3Client S3Client = new();
        private IConfiguration _config;
        private ILogger<BucketService> _logger;

        private bool Enabled { get; set; }
        public BucketService(IConfiguration config, ILogger<BucketService> logger)
        {
            _config = config;
            _logger = logger;

            var serviceUrl = _config["S3Config:S3ServiceUrl"];
            var accessKey = _config["S3Config:S3AccessKey"];
            var secretKey = _config["S3Config:S3SecretKey"];
            var profileImagesBucket = _config["S3Config:S3ProfileImagesBucket"];
            var cdnBucket = _config["S3Config:S3CDNBucket"];
            var imagesBucket = _config["S3Config:S3ImagesBucket"];
            var enabled = _config.GetValue<bool>("S3Config:S3Enabled");

            if (serviceUrl != null) ServiceUrl = serviceUrl;
            if (accessKey != null) AccessKey = accessKey;
            if (secretKey != null) SecretKey = secretKey;
            if (profileImagesBucket != null) ProfileImagesBucketName = profileImagesBucket;
            if (cdnBucket != null) CDNBucketName = cdnBucket;
            if (imagesBucket != null) ImagesBucketName = imagesBucket;

            Enabled = enabled;

            var credentials = new BasicAWSCredentials(AccessKey, SecretKey);
            S3Client = new AmazonS3Client(credentials, new AmazonS3Config
            {
                ServiceURL = ServiceUrl,
            });
            _logger = logger;
        }

        public async Task<bool> PutProfileImage(string userId, string imageName, byte[] imageBytes)
        {
            if (!Enabled)
            {
                _logger.LogWarning("Not Using S3 Bucket. Performance May Be Degraded.");
                return false;
            }

            try
            {
                using var stream = new MemoryStream(imageBytes);
                var request = new PutObjectRequest()
                {
                    Key = $@"{userId}/{imageName}",
                    BucketName = ProfileImagesBucketName,
                    InputStream = stream,
                    DisablePayloadSigning = true,
                    DisableDefaultChecksumValidation = true
                };

                var response = await S3Client.PutObjectAsync(request);
                return response.HttpStatusCode == System.Net.HttpStatusCode.OK || response.HttpStatusCode == System.Net.HttpStatusCode.Accepted;
            }
            catch (AmazonS3Exception ex)
            {
                _logger.LogError($"S3 Bucket Threw An Exception\n{ex.Message}\n{ex.StackTrace}");
                return false;
            }
        }

        public async Task<byte[]?> GetProfileImageBytes(string userId, string imageName)
        {
            if (!Enabled)
            {
                _logger.LogWarning("Not Using S3 Bucket. Performance May Be Degraded.");
                return default;
            }

            try
            {
                var response = await S3Client.GetObjectAsync(ProfileImagesBucketName, $@"{userId}/{imageName}");

                if (response != null)
                {
                    using var stream = response.ResponseStream;
                    using var ms = new MemoryStream();
                    stream.CopyTo(ms);
                    return ms.ToArray();
                }
                else return default;
            }
            catch (AmazonS3Exception ex)
            {
                _logger.LogError($"S3 Bucket Threw An Exception\n{ex.Message}\n{ex.StackTrace}");
                return default;
            }
        }

        public async Task<byte[]?> GetTagImageBytes(string tagName)
        {
            if (!Enabled)
            {
                _logger.LogWarning("Not Using S3 Bucket. Performance May Be Degraded.");
                return default;
            }

            try
            {
                var response = await S3Client.GetObjectAsync(CDNBucketName, $@"tags/{tagName}.png");

                if (response != null)
                {
                    using var stream = response.ResponseStream;
                    using var ms = new MemoryStream();
                    stream.CopyTo(ms);
                    return ms.ToArray();
                }
                else return default;
            }
            catch (AmazonS3Exception ex)
            {
                _logger.LogError($"S3 Bucket Threw An Exception\n{ex.Message}\n{ex.StackTrace}");
                return default;
            }
        }

        public async Task<bool> DeleteProfileImage(string userId, string imageName)
        {
            if (!Enabled)
            {
                _logger.LogWarning("Not Using S3 Bucket. Performance May Be Degraded.");
                return false;
            }

            try
            {
                var response = await S3Client.DeleteObjectAsync(ProfileImagesBucketName, $@"{userId}/{imageName}");
                return response.HttpStatusCode == System.Net.HttpStatusCode.OK || response.HttpStatusCode == System.Net.HttpStatusCode.Accepted;
            }
            catch (AmazonS3Exception ex)
            {
                _logger.LogError($"S3 Bucket Threw An Exception\n{ex.Message}\n{ex.StackTrace}");
                return false;
            }
        }
    }
}