using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;

using Google.Apis.Auth.OAuth2;
using Google.Apis.Drive.v3;
using Google.Apis.Drive.v3.Data;
using Google.Apis.Services;
using Google.Apis.Util.Store;
using System;
using System.IO;
using Google.Apis.Upload;
using System.Threading.Tasks;
using System.Threading;


public class GoogleDriveUtils
{

    static string[] Scopes = { DriveService.Scope.Drive }; // or DriveService.Scope.Drive for full access
    static string ApplicationName = "MyDriveUploader";
    // static string GoogleRawFileUrl = "https://drive.google.com/uc?id=";
    static string GoogleRawFileUrl = "https://drive.usercontent.google.com/download?id=";

    public static DriveService service;

    public static void setupService()
    {
        UserCredential credential;
        using (var stream = new FileStream("./Material/client_secret_30989913678-hk8sipecu98lp5vdsk0ictf5gufmn33p.apps.googleusercontent.com.json", FileMode.Open, FileAccess.Read))
        {
            // credential = GoogleCredential.FromStream(stream)
            //     .CreateScoped(Scopes);
             string credPath = "./Material/token.json";
             credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                GoogleClientSecrets.FromStream(stream).Secrets,
                Scopes,
                "user",
                CancellationToken.None,
                new FileDataStore(credPath, true)).Result;
        }

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


    public static string getFolder(DriveService service, string path, string parentFolderId)
    {
        Debug.Log("Getting/Creating folder path: " + path);

        List<string> folders = new List<string>(path.Split('/'));
        string currentFolderId = parentFolderId;

        foreach (string folder in folders)
        {
            var request = service.Files.List();
            request.Q = $"mimeType='application/vnd.google-apps.folder' and name='{folder}' and '{currentFolderId}' in parents and trashed=false";
            request.Fields = "files(id, name)";
            request.SupportsAllDrives = true;
            request.IncludeItemsFromAllDrives = true;

            var result = request.Execute();
            if (result.Files.Count > 0)
            {
                currentFolderId = result.Files[0].Id;
                Debug.Log("Found folder: " + folder + " with ID: " + currentFolderId);
            }
            else
            {
                // Folder does not exist, create it
                var fileMetadata = new Google.Apis.Drive.v3.Data.File()
                {
                    Name = folder,
                    MimeType = "application/vnd.google-apps.folder",
                    Parents = new List<string> { currentFolderId }
                };
                var createRequest = service.Files.Create(fileMetadata);
                createRequest.Fields = "id";
                createRequest.SupportsAllDrives = true;

                var file = createRequest.Execute();
                currentFolderId = file.Id;
            }
        }

        return currentFolderId;
    }

     public static IEnumerator UploadCoroutine(DriveService service, string _uploadFile, string folderId, string _fileId, string type, System.Action<string> onComplete)
    {
        Debug.Log("Uploading file to Google Drive: " + _uploadFile);

        if (!System.IO.File.Exists(_uploadFile))
        {
            Debug.LogError("File does not exist: " + _uploadFile);
            onComplete?.Invoke(null);
            yield break;
        }

        Google.Apis.Drive.v3.Data.File fileMetadata = new Google.Apis.Drive.v3.Data.File()
        {
            Name = Path.GetFileName(_uploadFile),
            Parents = new List<string> { folderId }
        };

        Debug.Log("Metadata prepared: " + fileMetadata.Name);

        using (var stream = new FileStream(_uploadFile, FileMode.Open))
        {
            var request = service.Files.Create(fileMetadata, stream, "image/png");
            request.Fields = "id, name";
            request.SupportsAllDrives = true;

            request.ProgressChanged += (progress) =>
            {
                Debug.Log($"Upload Progress: {progress.Status} - Bytes Sent: {progress.BytesSent} {progress.Exception?.Message}");
            };

            request.ResponseReceived += (file) =>
            {
                Debug.Log($"File uploaded successfully: {file.Name} (ID: {file.Id})");
            };

            var uploadTask = request.UploadAsync();

            // Wait for the upload to complete
            while (!uploadTask.IsCompleted)
            {
                yield return null; // pause and continue next frame
            }

            if (uploadTask.IsFaulted || uploadTask.IsCanceled)
            {
                Debug.LogError("Upload failed: " + uploadTask.Exception?.Message);
                onComplete?.Invoke(null);
                yield break;
            }

            var fileResult = request.ResponseBody;

            if (fileResult == null)
            {
                Debug.LogError("Upload failed, file is null.");
                onComplete?.Invoke(null);
                yield break;
            }

            string fileUrl = $"{GoogleRawFileUrl}{fileResult.Id}";
            onComplete?.Invoke(fileUrl);
        }
    }
}