using System.Linq;
using Babushka.scripts.CSharp.Common.Services;
using Babushka.scripts.CSharp.Low_Code.Variables;
using Godot;

namespace Babushka.scripts.CSharp.Common.CharacterControls;

public partial class InteractionArea2D : Node2D
{
    [ExportGroup("Settings")] 
    [Export] private VariableListener _selectionChangeListener;
    [Export] private Area2D _area;
    [Export] private Label _label;
    [Export] private bool _active = true;
    [Export] private bool _useOutline = true;
    [Export] private ShaderMaterial _outlineMaterial;
    [Export] private CanvasItem[] _spritesToOutline = [];
    [Export] private bool _showLabel = true;
    [Export] private int _id = -1; // TODO: remove

    private Material[] _backupMaterials;
    private bool _initializationComplete;

    [Signal] public delegate void InteractedToolEventHandler(int id); // TODO: remove

    [Signal] public delegate void InteractedEventHandler();

    public bool IsActive
    {
        get => _active;
        set
        {
            ProcessMode = value ? ProcessModeEnum.Inherit : ProcessModeEnum.Disabled;
            Visible = value;
            _selectionChangeListener.ProcessMode = value ? ProcessModeEnum.Inherit : ProcessModeEnum.Disabled;
            _active = value;
            if(!_active && _initializationComplete)
                ResetHighlight();
        } 
    }

    public bool IsSelectedByDetector { get; set; } = false;

    public void SetActiveInverse(bool active)
    {
        IsActive = !active;
    }

    public override void _Ready()
    {
        if (_useOutline)
        {
            _backupMaterials = _spritesToOutline.Select(s => s.Material).ToArray();
            _initializationComplete = true;
        }
    }

    public void HighlightInteractable()
    {
        IsSelectedByDetector = true;
        
        if (!_active || !InputService.Instance.InputEnabled)
            return;

        if (_showLabel)
            _label.Show();

        if (!_useOutline)
            return;
        
        foreach (var sprite in _spritesToOutline)
        {
            sprite.Material = _outlineMaterial;
        }
    }

    public void ResetHighlight()
    {
        IsSelectedByDetector = false;
        _label.Hide();

        if (!_useOutline)
            return;

        for (var i = 0; i < _spritesToOutline.Length; i++)
        {
            var sprite = _spritesToOutline[i];
            sprite.Material = _backupMaterials[i];
        }
    }

    public override void _Input(InputEvent @event)
    {
        if (!_active || !InputService.Instance.InputEnabled)
            return;
        
        if(!IsSelectedByDetector)
            return;

        if (@event.IsAction("interact") && @event.IsPressed())
        {
            TryInteract();
        }

        if (@event.IsActionPressed("click") && @event.IsPressed())
        {
            TryInteract();
        }
    }

    private void TryInteract()
    {
        if (_area.HasOverlappingAreas())
        {
            ResetHighlight();
            Interact();
        }
    }

    private void Interact()
    {
        EmitSignal(SignalName.InteractedTool, _id);
        EmitSignal(SignalName.Interacted);
    }

    public void SetSpriteActiveState(bool success, int id) // TODO: remove
    {
        if (!_active)
            return;
    }

    public void ToggleActive()
    {
        _active = !_active;
        _label.Hide();
    }


}