using System;
using Microsoft.Extensions.Options;
using Azure.Storage.Blobs;
using Landmark.OLA.Application.Configuration;
using Landmark.OLA.Models.Loan;

namespace Landmark.OLA.Application.DataAccess
{
    public class BlobStorageAccess : IBlobStorageAccess
    {
        readonly BlobServiceClient _blobServiceClient;
        readonly string _containerName;
        readonly BlobContainerClient _containerClient;
        readonly BlobStorageConnectionSettings _settings;
        
        public BlobStorageAccess(IOptions<BlobStorageConnectionSettings> settings) 
        {
            _settings = settings.Value;

            _blobServiceClient = new BlobServiceClient($"AccountName={_settings.AccountName};AccountKey={_settings.AccountKey}");
            _containerName = "documents";
            _containerClient = _blobServiceClient.GetBlobContainerClient(_containerName);
        }

        public byte[] GetBlobAsBytes(LoanApplicationFile file)
        {
            if (file == null)
            {
                return [];
            }

            var blob = _containerClient.GetBlobClient(file.GetBlobPath());

            var fileContent = blob.DownloadContent();
            var fileBytes = fileContent.Value.Content.ToArray();

            return fileBytes;
        }

        public string GetBlobAsBase64(LoanApplicationFile file)
        {
            var fileBytes = GetBlobAsBytes(file);

            return Convert.ToBase64String(fileBytes);
        }

        public bool SaveBlob(LoanApplicationFile file, byte[] fileBytes)
        {
            if(file == null || fileBytes == null || fileBytes.Length == 0)
            {
                return false;
            }

            BlobClient blobClient = _containerClient.GetBlobClient(file.GetBlobPath());
            blobClient.Upload(new BinaryData(fileBytes));
            blobClient.SetMetadata(file.GetMetadata());
            return true;
        }

        public bool DeleteBlob(LoanApplicationFile file)
        {
            if (file == null)
            {
                return false;
            }

            BlobClient blobClient = _containerClient.GetBlobClient(file.GetBlobPath());
            return blobClient.DeleteIfExists();
        }

    }
}