using Android.Content;
using Android.Views;
using AndroidX.RecyclerView.Widget;
using NotesApp.Adapters;
using NotesApp.Auth;
using NotesApp.Graph;
using NotesApp.Models;

namespace NotesApp.Activities;

[Activity(Label = "@string/choose_folder_title", Exported = false)]
public class FolderPickerActivity : Activity
{
    private const int SelectFolderRequestCode = 100;
    public const string ExtraFolderId = "folder_id";
    public const string ExtraFolderPath = "folder_path";

    private ProgressBar _progressBar = null!;
    private FolderListAdapter _adapter = null!;
    private GraphService _graphService = null!;

    private string? _folderId;
    private string _folderPath = "/";

    protected override void OnCreate(Bundle? savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.activity_folder_picker);

        _folderId = Intent?.GetStringExtra(ExtraFolderId);
        _folderPath = Intent?.GetStringExtra(ExtraFolderPath) ?? "/";

        FindViewById<TextView>(Resource.Id.folder_path_label)!.Text = _folderPath;

        _progressBar = FindViewById<ProgressBar>(Resource.Id.folder_progress)!;

        var recyclerView = FindViewById<RecyclerView>(Resource.Id.folder_recycler_view)!;
        recyclerView.SetLayoutManager(new LinearLayoutManager(this));

        _adapter = new FolderListAdapter(OnFolderTapped);
        recyclerView.SetAdapter(_adapter);

        FindViewById<Button>(Resource.Id.select_folder_button)!.Click += (_, _) =>
            SelectThisFolder();

        _graphService = new GraphService(this);

        _ = LoadFoldersAsync();
    }

    protected override void OnActivityResult(int requestCode, Result resultCode, Intent? data)
    {
        base.OnActivityResult(requestCode, resultCode, data);
        AuthService.HandleActivityResult(requestCode, resultCode, data);

        if (requestCode == SelectFolderRequestCode && resultCode == Result.Ok && data != null)
        {
            // A nested picker (a subfolder browsed into) selected a folder; forward the
            // result up the recursive chain and close this level too.
            SetResult(Result.Ok, data);
            Finish();
        }
    }

    private async Task LoadFoldersAsync()
    {
        _progressBar.Visibility = ViewStates.Visible;
        try
        {
            var folders = await _graphService.ListChildFoldersAsync(_folderId);
            _adapter.SetItems(folders);
        }
        catch (Exception ex)
        {
            Toast.MakeText(this, ex.Message, ToastLength.Long)?.Show();
        }
        finally
        {
            _progressBar.Visibility = ViewStates.Gone;
        }
    }

    private void OnFolderTapped(DriveFolderItem folder)
    {
        var intent = new Intent(this, typeof(FolderPickerActivity));
        intent.PutExtra(ExtraFolderId, folder.Id);
        intent.PutExtra(ExtraFolderPath, _folderPath.TrimEnd('/') + "/" + folder.Name);
        StartActivityForResult(intent, SelectFolderRequestCode);
    }

    private void SelectThisFolder()
    {
        var data = new Intent();
        data.PutExtra(ExtraFolderId, _folderId ?? "root");
        data.PutExtra(ExtraFolderPath, _folderPath);
        SetResult(Result.Ok, data);
        Finish();
    }
}