using Robust.Client.UserInterface.CustomControls;
using Robust.Client.AutoGenerated;
using Robust.Client.UserInterface.XAML;
using Robust.Client.UserInterface.Controls; // Starlight
using Robust.Shared.Configuration; // Starlight
using Content.Shared.Starlight.CCVar; // Starlight

namespace Content.Client.Labels.UI
{
    [GenerateTypedNameReferences]
    public sealed partial class HandLabelerWindow : DefaultWindow
    {
        [Dependency] private readonly IConfigurationManager _cfg = default!; // Starlight

        public event Action<string>? OnLabelChanged;
        public event Action<string>? OnLabelSelected; // Starlight

        /// <summary>
        /// Is the user currently entering text into the control?
        /// </summary>
        private bool _focused;
        // TODO LineEdit Make this a bool on the LineEdit control

        private string _label = string.Empty;
        private string _initialLabel = string.Empty;
        private bool _deleteMode = false; // Starlight
        private List<string> _savedLabels = []; // Starlight

        public HandLabelerWindow()
        {
            RobustXamlLoader.Load(this);
            IoCManager.InjectDependencies(this); // Starlight
            LoadSavedLabelsFromCVar(); // Starlight

            LabelLineEdit.OnTextChanged += e =>
            {
                _label = e.Text;
                OnLabelChanged?.Invoke(_label);
                UpdateButtons();
            };

            LabelLineEdit.OnFocusEnter += _ => _focused = true;
            LabelLineEdit.OnFocusExit += _ =>
            {
                _focused = false;
                LabelLineEdit.Text = _label;
            };
            ResetLabelButton.OnPressed += _ => LabelLineEdit.SetText(_initialLabel, true);
            ClearLabelButton.OnPressed += _ => LabelLineEdit.SetText("", true);

            // Starlight Begin
            SaveLabelButton.OnPressed += _ =>
            {
                if (!string.IsNullOrWhiteSpace(_label) && !_savedLabels.Contains(_label))
                {
                    _savedLabels.Add(_label);
                    SaveSavedLabelsToCVar();
                    UpdateSavedLabels(_savedLabels);
                }
            };

            DeleteLabelButton.OnPressed += _ =>
            {
                _deleteMode = !_deleteMode;
                DeleteLabelButton.Pressed = _deleteMode;
                UpdateButtons();
            };

            SavedLabelsList.OnItemSelected += args =>
            {
                if (_deleteMode)
                {
                    _savedLabels.RemoveAt(args.ItemIndex);
                    SaveSavedLabelsToCVar();
                    UpdateSavedLabels(_savedLabels);
                    UpdateButtons();
                }
                else
                {
                    if (SavedLabelsList[args.ItemIndex].Metadata is string label)
                    {
                        OnLabelSelected?.Invoke(label);
                    }
                }
            }; // Starlight End
        }

        protected override void Opened()
        {
            base.Opened();

            // Give the editor keyboard focus, since that's the only
            // thing the user will want to be doing with this UI
            LabelLineEdit.GrabKeyboardFocus();
        }

        public void SetCurrentLabel(string label)
        {
            if (label == _label)
                return;

            _label = label;
            if (!_focused)
            {
                LabelLineEdit.Text = label;
                UpdateButtons();
            }
        }

        public void SetInitialLabelState()
        {
            LabelLineEdit.Text = _label;
            LabelLineEdit.CursorPosition = _label.Length;
            LabelLineEdit.SelectionStart = 0;
            _initialLabel = _label;
            UpdateButtons();
        }

        // Starlight begin
        public void UpdateSavedLabels(List<string> labels)
        {
            var items = new List<ItemList.Item>();
            foreach (var label in labels)
            {
                var item = new ItemList.Item(SavedLabelsList)
                {
                    Text = label,
                    Metadata = label
                };
                items.Add(item);
            }
            SavedLabelsList.SetItems(items);
            UpdateButtons();
        }
        // Starlight end

        public void UpdateButtons()
        {
            ResetLabelButton.Disabled = (LabelLineEdit.Text == _initialLabel);
            ClearLabelButton.Disabled = (LabelLineEdit.Text == "");

            // Starlight begin
            var labelExists = false;
            foreach (var item in SavedLabelsList)
            {
                if ((item.Metadata as string) == _label.Trim())
                {
                    labelExists = true;
                    break;
                }
            }
            SaveLabelButton.Disabled = string.IsNullOrWhiteSpace(_label) || labelExists;

            DeleteLabelButton.Text = _deleteMode
                ? Loc.GetString("hand-labeler-delete-mode-text")
                : Loc.GetString("hand-labeler-delete-label-text");

            // Starlight end
        }
        public void SetMaxLabelLength(int maxLength)
        {
            LabelLineEdit.IsValid = s => s.Length <= maxLength;
        }
        // Starlight begin
        private void LoadSavedLabelsFromCVar()
        {
            var savedLabelsStr = _cfg.GetCVar(StarlightCCVars.HandLabelerSavedLabels);
            if (!string.IsNullOrEmpty(savedLabelsStr))
            {
                _savedLabels = new List<string>(savedLabelsStr.Split('\n', StringSplitOptions.RemoveEmptyEntries));
                UpdateSavedLabels(_savedLabels);
            }
        }

        private void SaveSavedLabelsToCVar()
        {
            var savedLabelsStr = string.Join('\n', _savedLabels);
            _cfg.SetCVar(StarlightCCVars.HandLabelerSavedLabels, savedLabelsStr);
            _cfg.SaveToFile();
        }
         // Starlight end
    }
}