using System;
using System.IO;
using System.Net.Http;
using System.Threading.Tasks;
using System.Text;
using System.Text.Json;

namespace ActivityRecorder
{
    public class DataUploader
    {
        private readonly string dataDirectory;
        private readonly string uploadUrl;
        private readonly HttpClient httpClient;
       
        public DataUploader(string directory, string url = "https://webhook.site/9f6aa227-0391-4254-9cac-2bc45ebc0705")
            // For the specific url above, only I (anika) can see request details
            // If you would like to see POST requests and content to verify uploads, go to Webhook.site and replace my url
            // with the automatic one generated for you
            // Alternatively, see the demo video attached to my email!
        {
            dataDirectory = directory;
            uploadUrl = url;
            httpClient = new HttpClient();
        }
       
        public async Task UploadAllData()
        {
            try
            {
                // Find all JSON file 
                string[] jsonFiles = Directory.GetFiles(dataDirectory, "*.json", SearchOption.AllDirectories);
                string[] imageFiles = Directory.GetFiles(dataDirectory, "*.jpg", SearchOption.TopDirectoryOnly);
                Console.WriteLine($"Found {jsonFiles.Length} JSON files and {imageFiles.Length} image files to upload.");       
                if (jsonFiles.Length == 0 && imageFiles.Length == 0)
                {
                    Console.WriteLine("No files to upload yet - please record first!");
                    return;
                }
               
                // Upload JSON files then image files (separate uploads)
                foreach (string file in jsonFiles)
                {
                    await UploadFileSimple(file);
                }
                foreach (string file in imageFiles)
                {
                    await UploadFileSimple(file);
                }     
                Console.WriteLine($"Upload complete: {jsonFiles.Length} JSON files and {imageFiles.Length} image files.");

            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error uploading data: {ex.Message}");
            }
        }
       
        private async Task UploadFileSimple(string filePath)
        {
            try
            {
                // Console.WriteLine($"attempting to upload: {filePath}");               
                // Create JSON object
                var fileInfo = new
                {
                    Filename = Path.GetFileName(filePath),
                    Timestamp = DateTime.Now,
                    FileType = Path.GetExtension(filePath),
                    Content = Convert.ToBase64String(File.ReadAllBytes(filePath))
                };
               
                string jsonContent = JsonSerializer.Serialize(fileInfo);
                var content = new StringContent(jsonContent, Encoding.UTF8, "application/json");
               
                // Console.WriteLine($"sending simplified JSON request to: {uploadUrl}");
               
                // Send POST request
                var response = await httpClient.PostAsync(uploadUrl, content);

                // Console.WriteLine($"Response status: {response.StatusCode}");
               
                // Check if successful
                if (response.IsSuccessStatusCode)
                {
                    Console.WriteLine($"Successfully uploaded: {filePath}");                  
                    // Move file to "uploaded" subfolder
                    string uploadedDir = Path.Combine(Path.GetDirectoryName(filePath), "uploaded");
                    Directory.CreateDirectory(uploadedDir);
                    string destFile = Path.Combine(uploadedDir, Path.GetFileName(filePath));
                    File.Move(filePath, destFile, true);
                }
                else
                {
                    string responseContent = await response.Content.ReadAsStringAsync();
                    Console.WriteLine($"Failed to upload {filePath}: {response.StatusCode}");
                    Console.WriteLine($"Response content: {responseContent}");
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error uploading {filePath}: {ex.Message}");
                Console.WriteLine($"Stack trace: {ex.StackTrace}");
            }
        }
    }
}