using Google.Apis.Auth.OAuth2;
using Google.Apis.Auth.OAuth2.Flows;
using Google.Apis.Auth.OAuth2.Responses;
using Google.Apis.Drive.v3;
using Google.Apis.Services;
using Google.Apis.Util.Store;
using Google.Apis.Drive.v3.Data;
using System.IO;
using System.Collections.Generic;

// usage example at the very bottom
namespace ConsoleApp1
{
    public class GoogleDriveFilesService
    {
        private static DriveService GetService()
        {   // ключи для почты asbautodrilling@gmail.com.
            var tokenResponse = new TokenResponse
            {
                AccessToken = "ya29.a0ARrdaM-lM7q0TIC_DXixR4oW63QUftjSPHl-8nIdvZwtqA8Z1bXtlYpDrQXj9UFTjW8FW8uqPMrdamUSp4kO4a9JX7FddkBWxaJ_omSJpqzDfnHTHA_7-zGMUohaAsmPLsQtFz_GUmB5ZoVLmA8xWdbJxVxU",
                RefreshToken = "1//04FeDguc19IfgCgYIARAAGAQSNwF-L9Ir8U7wX2seanUzsxXXGgFzOYQqjbtN9O27ZZybbOobZjVAo_4_eFNLMX1ElPKOFVWsrJQ"
            };

            var applicationName = "Files"; // Use the name of the project in Google Cloud
            var username = "asbautodrilling@gmail.com"; // Use your email

            var apiCodeFlow = new GoogleAuthorizationCodeFlow(new GoogleAuthorizationCodeFlow.Initializer
            {
                ClientSecrets = new ClientSecrets
                {
                    ClientId = "1020584579240-f7amqg35qg7j94ta1ntgitajq27cgh49.apps.googleusercontent.com",
                    ClientSecret = "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"
                },
                Scopes = new[] {DriveService.Scope.Drive},
                DataStore = new FileDataStore(applicationName)
            });

            var credential = new UserCredential(apiCodeFlow, username, tokenResponse);

            var service = new DriveService(new BaseClientService.Initializer
            {
                HttpClientInitializer = credential,
                ApplicationName = applicationName
            });
            return service;
        }

        //public string CreateFolder(string parent, string folderName)
        public string CreateFolder(string folderName) // Это fileName. У гугла почему-то все называется folder: и папка, и файл.
        {                                             // С parent почему-то не дружит, выкидывает Exception.
            var service = GetService();
            var driveFolder = new Google.Apis.Drive.v3.Data.File();
            driveFolder.Name = folderName;
            driveFolder.MimeType = "application/vnd.google-apps.folder";
            //driveFolder.Parents = new string[] { parent };
            var command = service.Files.Create(driveFolder);
            var file = command.Execute();
            return file.Id;
        }
        
        //public string UploadFile(Stream file, string fileName, string fileMime, string folder, string fileDescription)
        public string UploadFile(Stream file, string fileName, string fileMime, string fileDescription)
        {
            DriveService service = GetService();
    
            var driveFile = new Google.Apis.Drive.v3.Data.File();
            driveFile.Name = fileName;
            driveFile.Description = fileDescription;
            driveFile.MimeType = fileMime;
            //driveFile.Parents = new [] {folder};
    
            var request = service.Files.Create(driveFile, file, fileMime);
            request.Fields = "id";
    
            var response = request.Upload();
            if (response.Status != Google.Apis.Upload.UploadStatus.Completed)
                throw response.Exception;
    
            return request.ResponseBody.Id;
        }
        
        //public IEnumerable<Google.Apis.Drive.v3.Data.File> GetFiles(string folder)
        public IEnumerable<Google.Apis.Drive.v3.Data.File> GetFiles()
        {
            var service = GetService();
    
            var fileList = service.Files.List();
            // Это выражение ниже тоже чот не работает, выкидывает Exception. Без них выгружаются все файлы и
            // папки водин список.
            //fileList.Q =$"mimeType!='application/vnd.google-apps.folder' and '{folder}' in parents";
            //fileList.Fields = "nextPageToken, files(id, name, size, mimeType)";
    
            var result = new List<Google.Apis.Drive.v3.Data.File>();
            string pageToken = null;
            do
            {
                fileList.PageToken = pageToken;
                var filesResult = fileList.Execute();
                var files = filesResult.Files;
                pageToken = filesResult.NextPageToken;
                result.AddRange(files);
            } while (pageToken != null);
    
            return result;
        }
        
        public void DeleteFile(string fileId)
        {
            var service = GetService();
            var command = service.Files.Delete(fileId);
            var result = command.Execute();
        }
    }
}

// usage example:

// var service = new GoogleDriveFilesService();
//
// var files = service.GetFiles();
// Console.WriteLine(files);
//             
// var newFolderId = service.CreateFolder("testText.txt");
// Console.WriteLine(newFolderId);
//
// var path = "/home/vladimir/TestUploadFile.txt";
// var fileInfo = new FileInfo(path);
// var fileStream = File.Open(path, FileMode.Open);
// var uploadedFileId = service.UploadFile(fileStream, fileInfo.Name, "", "uploaded");
// Console.WriteLine(uploadedFileId);