using Godot;
using System.Collections.Generic;

namespace TheGame
{
    public partial class LoadGameMenu : Control
    {
        private VBoxContainer _saveList;
        private SaveManager _saveManager;
        private Label _titleLabel;
        private Button _backButton;
        
        public override void _Ready()
        {
            // Lägg till i localized_ui gruppen
            AddToGroup("localized_ui");
            
            _saveList = GetNode<VBoxContainer>("VBoxContainer/ScrollContainer/SaveList");
            _titleLabel = GetNode<Label>("VBoxContainer/TitleLabel");
            _backButton = GetNode<Button>("VBoxContainer/BackButton");
            _saveManager = new SaveManager();
            
            UpdateLocalization();
            PopulateSaveList();
        }
        
        public void UpdateLocalization()
        {
            var loc = LocalizationManager.Instance;
            _titleLabel.Text = loc.GetText("load_game_title");
            _backButton.Text = loc.GetText("load_game_back");
        }
        
        public override void _Notification(int what)
        {
            if (what == NotificationWMCloseRequest)
            {
                // I load game menyn kan vi avsluta direkt
                GetTree().Quit();
            }
        }
        
        private void PopulateSaveList()
        {
            // Rensa tidigare innehåll
            foreach (Node child in _saveList.GetChildren())
            {
                child.QueueFree();
            }
            
            var savedGames = _saveManager.GetSavedGames();
            
            if (savedGames.Count == 0)
            {
                var noSavesLabel = new Label();
                var loc = LocalizationManager.Instance;
                noSavesLabel.Text = loc.GetText("load_game_no_saves");
                noSavesLabel.HorizontalAlignment = HorizontalAlignment.Center;
                _saveList.AddChild(noSavesLabel);
                return;
            }
            
            foreach (var saveData in savedGames)
            {
                var gameContainer = new VBoxContainer();
                gameContainer.AddThemeConstantOverride("separation", 5);
                
                // Header med seed info
                var seedLabel = new Label();
                seedLabel.Text = $"Game: {saveData.GameSeed.ToString()}";
                seedLabel.AddThemeStyleboxOverride("normal", new StyleBoxFlat());
                gameContainer.AddChild(seedLabel);
                
                // Continue button (senaste instansen)
                var latestInstance = saveData.GetLatestInstance();
                if (latestInstance != null)
                {
                    var continueButton = new Button();
                    continueButton.Text = $"Continue: {latestInstance.DisplayName}\nTime: {latestInstance.GetFormattedGameTime()}\nSaved: {latestInstance.SaveDate:yyyy-MM-dd HH:mm}";
                    continueButton.Pressed += () => LoadGame(saveData, latestInstance);
                    gameContainer.AddChild(continueButton);
                }
                
                // Load Previous button (om det finns fler instanser)
                if (saveData.Instances.Count > 1)
                {
                    var loadPreviousButton = new Button();
                    loadPreviousButton.Text = $"Load Previous ({saveData.Instances.Count - 1} other saves)";
                    loadPreviousButton.Pressed += () => ShowInstanceSelection(saveData);
                    gameContainer.AddChild(loadPreviousButton);
                }
                
                // Separator mellan games
                var separator = new HSeparator();
                gameContainer.AddChild(separator);
                
                _saveList.AddChild(gameContainer);
            }
        }
        
        private void LoadGame(SaveData saveData, SaveInstance instance = null)
        {
            if (_saveManager.LoadGame(saveData, instance))
            {
                GetTree().ChangeSceneToFile("res://scenes/Game.tscn");
            }
            else
            {
                GD.PrintErr("Failed to load selected game");
                
                // Visa error message
                var errorDialog = new AcceptDialog();
                errorDialog.DialogText = "Failed to load the selected save.";
                errorDialog.Title = "Load Error";
                GetTree().Root.AddChild(errorDialog);
                errorDialog.PopupCentered();
            }
        }
        
        private void ShowInstanceSelection(SaveData saveData)
        {
            var instanceMenu = new InstanceSelectionMenu();
            instanceMenu.Initialize(saveData);
            GetTree().Root.AddChild(instanceMenu);
            instanceMenu.PopupCentered(new Vector2I(500, 400));
        }
        
        private void _on_back_button_pressed()
        {
            GetTree().ChangeSceneToFile("res://scenes/MainMenu.tscn");
        }
    }
}