Swarm/DysonNetwork.Drive/Clients/FileServiceClient.cs

using System;
using System.IO;
using System.Net.Http;
using System.Text.Json;
using System.Threading.Tasks;
using DysonNetwork.Common.Interfaces;
using DysonNetwork.Common.Models;
using Microsoft.Extensions.Logging;

namespace DysonNetwork.Drive.Clients
{
    public class FileServiceClient : IFileServiceClient, IDisposable
    {
        private readonly HttpClient _httpClient;
        private readonly ILogger<FileServiceClient> _logger;
        private readonly JsonSerializerOptions _jsonOptions;

        public FileServiceClient(HttpClient httpClient, ILogger<FileServiceClient> logger)
        {
            _httpClient = httpClient ?? throw new ArgumentNullException(nameof(httpClient));
            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
            _jsonOptions = new JsonSerializerOptions { PropertyNameCaseInsensitive = true };
        }

        public async Task<CloudFile> GetFileAsync(string fileId)
        {
            var response = await _httpClient.GetAsync($"api/files/{fileId}");
            response.EnsureSuccessStatusCode();
            
            await using var stream = await response.Content.ReadAsStreamAsync();
            return await JsonSerializer.DeserializeAsync<CloudFile>(stream, _jsonOptions) 
                   ?? throw new InvalidOperationException("Failed to deserialize file response");
        }

        public async Task<Stream> GetFileStreamAsync(string fileId)
        {
            var response = await _httpClient.GetAsync($"api/files/{fileId}/download");
            response.EnsureSuccessStatusCode();
            return await response.Content.ReadAsStreamAsync();
        }

        public async Task<CloudFile> UploadFileAsync(Stream fileStream, string fileName, string? contentType = null)
        {
            using var content = new MultipartFormDataContent
            {
                { new StreamContent(fileStream), "file", fileName }
            };

            var response = await _httpClient.PostAsync("api/files/upload", content);
            response.EnsureSuccessStatusCode();
            
            await using var responseStream = await response.Content.ReadAsStreamAsync();
            return await JsonSerializer.DeserializeAsync<CloudFile>(responseStream, _jsonOptions) 
                   ?? throw new InvalidOperationException("Failed to deserialize upload response");
        }

        public async Task DeleteFileAsync(string fileId)
        {
            var response = await _httpClient.DeleteAsync($"api/files/{fileId}");
            response.EnsureSuccessStatusCode();
        }

        public async Task<CloudFile> ProcessImageAsync(Stream imageStream, string fileName, string? contentType = null)
        {
            using var content = new MultipartFormDataContent
            {
                { new StreamContent(imageStream), "image", fileName }
            };

            var response = await _httpClient.PostAsync("api/files/process-image", content);
            response.EnsureSuccessStatusCode();
            
            await using var responseStream = await response.Content.ReadAsStreamAsync();
            return await JsonSerializer.DeserializeAsync<CloudFile>(responseStream, _jsonOptions) 
                   ?? throw new InvalidOperationException("Failed to deserialize image processing response");
        }

        public async Task<string> GetFileUrl(string fileId, bool useCdn = false)
        {
            var url = $"api/files/{fileId}/url";
            if (useCdn)
            {
                url += "?useCdn=true";
            }
            
            var response = await _httpClient.GetAsync(url);
            response.EnsureSuccessStatusCode();
            
            var result = await response.Content.ReadAsStringAsync();
            return JsonSerializer.Deserialize<string>(result, _jsonOptions) ?? string.Empty;
        }

        public void Dispose()
        {
            _httpClient?.Dispose();
            GC.SuppressFinalize(this);
        }
    }
}