using System;
using System.IO;
using System.Threading.Tasks;
using Azure;
using Azure.Storage.Blobs;
using Azure.Storage.Blobs.Models;

namespace LCU.API.Internal.DocumentLib.DataAccess;

public class BlobApiDao : IBlobApiDao
{
    private readonly BlobContainerClient _client;

    public BlobApiDao(IBlobStorageClient storageClient)
    {
        _client = storageClient.GetClient();
    }

    public async Task<Guid> SaveDocumentToBlob(byte[] fileData)
    {
        var blobDocumentId = Guid.NewGuid();

        using var stream = new MemoryStream(fileData, false);
        await _client.GetBlobClient(blobDocumentId.ToString()).UploadAsync(stream);
        return blobDocumentId;
    }

    public async Task UpdateDocumentInBlob(Guid blobDocumentId, byte[] fileData)
    {
        using var stream = new MemoryStream(fileData, false);
        await _client.GetBlobClient(blobDocumentId.ToString()).UploadAsync(stream, true);
    }

    public async Task<Response> RemoveDocumentFromBlob(Guid blobDocumentId)
    {
        return await _client.GetBlobClient(blobDocumentId.ToString())
            .DeleteAsync(DeleteSnapshotsOption.IncludeSnapshots);
    }

    public async Task<Response<BlobDownloadStreamingResult>> GetDocumentFromBlob(Guid blobDocumentId)
    {
        return await _client.GetBlobClient(blobDocumentId.ToString()).DownloadStreamingAsync();
    }
}