using Godot;
using System;
 
public partial class TestPerfectPixelScene : Node2D
{
    public enum HandlerType
    {
        UnHandler,
        NormalHandler,
        OffsetHandler
    }
 
    [Export]
    public CharacterBody2D Player;
 
    [Export]
    public Label FpsLabel;
    
    [Export]
    public Camera2D Camera2D;
 
    [Export]
    public float Speed = 50;
 
    [Export]
    public float CameraRecoveryScale = 5;
 
    [Export]
    public SubViewportContainer SubViewportContainer;
 
    [Export]
    public HandlerType Type;
    
    private ShaderMaterial _shaderMaterial;
    private Vector2 _cameraPos;
 
    public override void _Ready()
    {
        if (SubViewportContainer != null)
        {
            _shaderMaterial = (ShaderMaterial)SubViewportContainer.Material;
        }
    }
 
    public override void _Process(double delta)
    {
        InputManager.Update((float)delta);
 
        
    }
 
    public override void _PhysicsProcess(double delta)
    {
        FpsLabel.Text = "FPS: " + Engine.GetFramesPerSecond();
        Player.Velocity = InputManager.MoveAxis * Speed;
        Player.MoveAndSlide();
 
        var playerPos = Player.GlobalPosition;
        //_cameraPos = playerPos;
        _cameraPos = _cameraPos.MoveToward(playerPos, playerPos.DistanceTo(_cameraPos) * (float)delta * CameraRecoveryScale);
 
        if (Type == HandlerType.UnHandler)
        {
            Camera2D.GlobalPosition = _cameraPos;
        }
        else if (Type == HandlerType.NormalHandler)
        {
            Camera2D.GlobalPosition = _cameraPos.Round();
        }
        else if (Type == HandlerType.OffsetHandler)
        {
            if (_shaderMaterial != null)
            {
                var cameraPosition = _cameraPos;
                var offset = cameraPosition.Round() - cameraPosition;
                _shaderMaterial.SetShaderParameter("offset", offset);
                Camera2D.GlobalPosition = cameraPosition.Round();
            }
        }
    }
}