using Godot;
using System.Collections.Generic;
using System.Linq;

namespace TheGame
{
    public partial class InstanceSelectionMenu : AcceptDialog
    {
        private SaveData _saveData;
        private VBoxContainer _instanceList;
        private Button _cancelButton;
        
        public override void _Ready()
        {
            ProcessMode = ProcessModeEnum.Always;
            Title = "Select Save Instance";
            
            var vbox = new VBoxContainer();
            
            // Header info
            var headerLabel = new Label();
            headerLabel.Text = $"Game Seed: {_saveData?.GameSeed?.ToString() ?? "Unknown"}";
            headerLabel.AddThemeStyleboxOverride("normal", new StyleBoxFlat());
            vbox.AddChild(headerLabel);
            
            var separator = new HSeparator();
            vbox.AddChild(separator);
            
            // Scroll container för instanser
            var scrollContainer = new ScrollContainer();
            scrollContainer.CustomMinimumSize = new Vector2(0, 300);
            
            _instanceList = new VBoxContainer();
            scrollContainer.AddChild(_instanceList);
            vbox.AddChild(scrollContainer);
            
            // Cancel button
            var buttonContainer = new HBoxContainer();
            buttonContainer.Alignment = BoxContainer.AlignmentMode.End;
            
            _cancelButton = new Button();
            _cancelButton.Text = "Cancel";
            _cancelButton.Pressed += OnCancelPressed;
            buttonContainer.AddChild(_cancelButton);
            
            vbox.AddChild(buttonContainer);
            
            AddChild(vbox);
            
            PopulateInstanceList();
        }
        
        public void Initialize(SaveData saveData)
        {
            _saveData = saveData;
        }
        
        private void PopulateInstanceList()
        {
            if (_saveData?.Instances == null) return;
            
            // Sortera instances efter save date (nyast först)
            var sortedInstances = _saveData.Instances.OrderByDescending(i => i.SaveDate).ToList();
            
            foreach (var instance in sortedInstances)
            {
                var instanceButton = new Button();
                instanceButton.CustomMinimumSize = new Vector2(0, 60);
                instanceButton.SizeFlagsHorizontal = Control.SizeFlags.ExpandFill;
                
                // Skapa text med formatering
                var instanceText = $"{instance.DisplayName}\n";
                instanceText += $"Game Time: {instance.GetFormattedGameTime()}\n";
                instanceText += $"Saved: {instance.SaveDate:yyyy-MM-dd HH:mm:ss}";
                
                instanceButton.Text = instanceText;
                instanceButton.Pressed += () => OnInstanceSelected(instance);
                
                _instanceList.AddChild(instanceButton);
            }
        }
        
        private void OnInstanceSelected(SaveInstance instance)
        {
            var saveManager = new SaveManager();
            if (saveManager.LoadGame(_saveData, instance))
            {
                GetTree().ChangeSceneToFile("res://scenes/Game.tscn");
            }
            else
            {
                GD.PrintErr("Failed to load selected game instance");
                // Visa error message till användaren
                var errorDialog = new AcceptDialog();
                errorDialog.DialogText = "Failed to load the selected save instance.";
                errorDialog.Title = "Load Error";
                GetTree().Root.AddChild(errorDialog);
                errorDialog.PopupCentered();
            }
            
            QueueFree();
        }
        
        private void OnCancelPressed()
        {
            QueueFree();
        }
        
        public override void _Input(InputEvent @event)
        {
            if (@event is InputEventKey keyEvent && keyEvent.Pressed)
            {
                if (keyEvent.Keycode == Key.Escape)
                {
                    OnCancelPressed();
                    GetViewport().SetInputAsHandled();
                }
            }
        }
    }
}