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

namespace Babushka.scripts.CSharp.Common.CharacterControls;

public partial class InteractionArea2D : Node2D
{
    
    [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;

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

    [Signal] public delegate void InteractedEventHandler();

    public bool IsActive
    {
        get => _active;
        set => _active = value;
    }

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

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


    public void OnPlayerEntered(Node2D player)
    {
        if (!_active || !InputService.Instance.InputEnabled)
            return;

        if (_showLabel)
            _label.Show();

        if (!_useOutline)
            return;

        foreach (var sprite in _spritesToOutline)
        {
            sprite.Material = _outlineMaterial;
        }
    }

    public void OnPlayerExited(Node2D player)
    {
        _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 (@event.IsAction("interact") && @event.IsPressed())
        {
            TryInteract();
        }

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

    private void TryInteract()
    {
        if (_area.HasOverlappingAreas())
        {
            _label.Hide();

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

            EmitSignal(SignalName.InteractedTool, _id);
            EmitSignal(SignalName.Interacted);
        }
    }

    public void SetSpriteActiveState(bool success, int id) // TODO: remove
    {
        GD.PrintErr("SetSpriteActiveState is being called.");
        if (!_active)
            return;
    }

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