using Godot;

namespace TheGame
{
    public partial class AdvancedSaveDialog : AcceptDialog
    {
        private LineEdit _nameInput;
        private CheckBox _newInstanceCheck;
        private Label _infoLabel;
        private Game _gameController;
        private SaveData _existingSaveData;
        
        public override void _Ready()
        {
            // Sätt process mode så att dialogen fungerar när spelet är pausat
            ProcessMode = ProcessModeEnum.WhenPaused;
            
            var loc = LocalizationManager.Instance;
            Title = loc.GetText("save_dialog_title");
            
            // Kontrollera om det finns befintlig save för denna seed
            var saveManager = new SaveManager();
            if (GameState.CurrentGameSeed != null)
            {
                _existingSaveData = saveManager.FindSaveDataBySeed(GameState.CurrentGameSeed);
            }
            
            CreateDialogContent();
            
            // Sätt process mode på alla child nodes
            SetProcessModeRecursive(this, ProcessModeEnum.WhenPaused);
        }
        
        private void CreateDialogContent()
        {
            var vbox = new VBoxContainer();
            
            if (_existingSaveData == null || _existingSaveData.Instances.Count == 0)
            {
                // Första gången man sparar detta spel - bara namn input
                CreateFirstTimeSaveUI(vbox);
            }
            else
            {
                // Det finns befintliga saves - visa alternativ
                CreateExistingSaveUI(vbox);
            }
            
            AddChild(vbox);
        }
        
        private void CreateFirstTimeSaveUI(VBoxContainer vbox)
        {
            var loc = LocalizationManager.Instance;
            
            var infoLabel = new Label();
            infoLabel.Text = "This is your first save for this game.";
            infoLabel.AutowrapMode = TextServer.AutowrapMode.WordSmart;
            vbox.AddChild(infoLabel);
            
            var separator = new HSeparator();
            vbox.AddChild(separator);
            
            // Save name input
            var nameLabel = new Label();
            nameLabel.Text = loc.GetText("save_dialog_enter_name");
            vbox.AddChild(nameLabel);
            
            _nameInput = new LineEdit();
            _nameInput.PlaceholderText = loc.GetText("save_dialog_placeholder");
            _nameInput.Text = $"Save {System.DateTime.Now:HH:mm:ss}";
            vbox.AddChild(_nameInput);
            
            // Anslut signaler
            Confirmed += OnSaveConfirmed;
            
            // Fokusera på text input
            _nameInput.GrabFocus();
            _nameInput.SelectAll();
        }
        
        private void CreateExistingSaveUI(VBoxContainer vbox)
        {
            var latestInstance = _existingSaveData.GetLatestInstance();
            
            var infoLabel = new Label();
            infoLabel.Text = $"Game Seed: {_existingSaveData.GameSeed.ToString()}\nExisting saves: {_existingSaveData.Instances.Count}\nLatest: {latestInstance.DisplayName} ({latestInstance.GetFormattedGameTime()})";
            infoLabel.AutowrapMode = TextServer.AutowrapMode.WordSmart;
            vbox.AddChild(infoLabel);
            
            var separator = new HSeparator();
            vbox.AddChild(separator);
            
            // Button för att skriva över senaste save
            var overwriteButton = new Button();
            overwriteButton.Text = "Save over the last save point";
            overwriteButton.CustomMinimumSize = new Vector2(0, 40);
            overwriteButton.Pressed += OnOverwriteLatestPressed;
            vbox.AddChild(overwriteButton);
            
            // Button för att skapa ny save point
            var newSaveButton = new Button();
            newSaveButton.Text = "Save a new save point";
            newSaveButton.CustomMinimumSize = new Vector2(0, 40);
            newSaveButton.Pressed += OnNewSavePressed;
            vbox.AddChild(newSaveButton);
            
            // Dölj standard OK-knappen
            GetOkButton().Visible = false;
        }
        
        public void Initialize(Game gameController)
        {
            _gameController = gameController;
        }
        
        private void ShowErrorDialog(string message)
        {
            var errorDialog = new AcceptDialog();
            errorDialog.DialogText = message;
            errorDialog.Title = "Save Error";
            errorDialog.ProcessMode = ProcessModeEnum.WhenPaused;
            GetTree().Root.AddChild(errorDialog);
            errorDialog.PopupCentered();
        }
        
        private void OnOverwriteLatestPressed()
        {
            // Skriv över senaste save utan att fråga om namn
            if (_gameController != null)
            {
                var saveManager = new SaveManager();
                float currentTime = _gameController.GetGameTime();
                
                bool saveSuccess = saveManager.SaveGame(currentTime, "", GameState.CurrentGameSeed, true); // overwriteLatest = true
                
                if (saveSuccess)
                {
                    GameState.MarkProgressAsSaved(currentTime);
                    _gameController.TogglePause();
                }
                else
                {
                    ShowErrorDialog("Failed to save the game. Please try again.");
                    return;
                }
            }
            
            QueueFree();
        }
        
        private void OnNewSavePressed()
        {
            // Visa namn-input dialog för ny save point
            ShowNameInputDialog();
        }
        
        private void ShowNameInputDialog()
        {
            // Rensa nuvarande innehåll
            foreach (Node child in GetChildren())
            {
                if (child != GetOkButton())
                {
                    child.QueueFree();
                }
            }
            
            var vbox = new VBoxContainer();
            
            var loc = LocalizationManager.Instance;
            
            var nameLabel = new Label();
            nameLabel.Text = loc.GetText("save_dialog_enter_name");
            vbox.AddChild(nameLabel);
            
            _nameInput = new LineEdit();
            _nameInput.PlaceholderText = loc.GetText("save_dialog_placeholder");
            _nameInput.Text = $"Save {System.DateTime.Now:HH:mm:ss}";
            vbox.AddChild(_nameInput);
            
            AddChild(vbox);
            
            // Visa OK-knappen igen och anslut till ny save
            GetOkButton().Visible = true;
            
            // Ta bort tidigare signaler och lägg till ny
            if (IsConnected("confirmed", new Callable(this, nameof(OnSaveConfirmed))))
            {
                Disconnect("confirmed", new Callable(this, nameof(OnSaveConfirmed)));
            }
            Confirmed += OnNewSaveConfirmed;
            
            // Fokusera på text input
            _nameInput.GrabFocus();
            _nameInput.SelectAll();
        }
        
        private void OnNewSaveConfirmed()
        {
            if (_gameController != null)
            {
                string saveName = _nameInput.Text.Trim();
                if (string.IsNullOrEmpty(saveName))
                {
                    saveName = $"Save {System.DateTime.Now:HH:mm:ss}";
                }
                
                var saveManager = new SaveManager();
                float currentTime = _gameController.GetGameTime();
                
                bool saveSuccess = saveManager.SaveGame(currentTime, saveName, GameState.CurrentGameSeed, false); // overwriteLatest = false (ny instans)
                
                if (saveSuccess)
                {
                    GameState.MarkProgressAsSaved(currentTime);
                    _gameController.TogglePause();
                }
                else
                {
                    ShowErrorDialog("Failed to save the game. Please try again.");
                    return;
                }
            }
            
            QueueFree();
        }
        
        private void OnSaveConfirmed()
        {
            // För första gången man sparar
            if (_gameController != null)
            {
                string saveName = _nameInput.Text.Trim();
                if (string.IsNullOrEmpty(saveName))
                {
                    saveName = $"Save {System.DateTime.Now:HH:mm:ss}";
                }
                
                var saveManager = new SaveManager();
                float currentTime = _gameController.GetGameTime();
                
                bool saveSuccess = saveManager.SaveGame(currentTime, saveName, GameState.CurrentGameSeed, false); // Första save är alltid ny instans
                
                if (saveSuccess)
                {
                    GameState.MarkProgressAsSaved(currentTime);
                    _gameController.TogglePause();
                }
                else
                {
                    ShowErrorDialog("Failed to save the game. Please try again.");
                    return;
                }
            }
            
            QueueFree();
        }
        
        private void SetProcessModeRecursive(Node node, ProcessModeEnum mode)
        {
            if (node is Control control)
            {
                control.ProcessMode = mode;
            }
            
            foreach (Node child in node.GetChildren())
            {
                SetProcessModeRecursive(child, mode);
            }
        }
        
        public override void _Input(InputEvent @event)
        {
            if (@event is InputEventKey keyEvent && keyEvent.Pressed)
            {
                if (keyEvent.Keycode == Key.Enter || keyEvent.Keycode == Key.KpEnter)
                {
                    // Hantera Enter baserat på nuvarande state
                    if (_nameInput != null && _nameInput.Visible)
                    {
                        if (IsConnected("confirmed", new Callable(this, nameof(OnNewSaveConfirmed))))
                        {
                            OnNewSaveConfirmed();
                        }
                        else
                        {
                            OnSaveConfirmed();
                        }
                    }
                    GetViewport().SetInputAsHandled();
                }
                else if (keyEvent.Keycode == Key.Escape)
                {
                    Hide();
                    QueueFree();
                    GetViewport().SetInputAsHandled();
                }
            }
        }
    }
}