using TMPro;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.UI;

[UnitCategory("Custom")]
public class FadeUIImageNode : Unit
{
    [DoNotSerialize]
    public ControlInput enter { get; private set; }

    [DoNotSerialize]
    public ControlOutput exit { get; private set; }

    [DoNotSerialize]
    public ControlOutput state2 { get; private set; }

    [DoNotSerialize]
    public ValueInput uiInput { get; private set; }

    [DoNotSerialize]
    public ValueInput imageInput { get; private set; }

    [DoNotSerialize]
    public ValueInput textInput { get; private set; }

    [DoNotSerialize]
    public ValueInput durationInput { get; private set; }

    [DoNotSerialize]
    public ValueInput resetInput { get; private set; }

    private Image image;
    private TextMeshProUGUI textMeshProUGUI;
    private float duration;
    private Canvas canvas;
    private int childIndex;
    private float childtimer;

    private float timer;
    private float timer2;
    private bool fadingIn;
    private bool textIn;
    private bool init = true;
    private bool reset;
    private bool loadOver;

    private RectTransform rectTransform;
    private Vector2 initialPosition;
    private Vector2 targetPosition = Vector2.zero;

    protected override void Definition()
    {
        enter = ControlInput("enter", (flow) =>
        {
            reset = flow.GetValue<bool>(resetInput);
            if (reset)
            {
                Reset(flow);
                return exit;
            }
            else if(!loadOver)
            {
                //Moving(flow);
                //Fading(flow);
                LoadUiFaded(flow);

            }
            else
            {
                Fading(flow);
            }
            return state2;
        });
        

        imageInput = ValueInput<Image>("image");
        durationInput = ValueInput<float>("duration",2.0f);
        textInput = ValueInput<TextMeshProUGUI>("text");
        resetInput = ValueInput<bool>("reset", false);
        uiInput = ValueInput<Canvas>("canvas");
        
        exit = ControlOutput("exit");
        state2 = ControlOutput("state");
        Succession(enter, exit);
    }

    private void Reset(Flow flow)
    {
        if(init)
        {
            init = false;
            image = flow.GetValue<Image>(imageInput);
            duration = flow.GetValue<float>(durationInput);
            textMeshProUGUI = flow.GetValue<TextMeshProUGUI>(textInput);
            rectTransform = textMeshProUGUI.GetComponent<RectTransform>();
            canvas = flow.GetValue<Canvas>(uiInput);
            targetPosition = rectTransform.anchoredPosition;
        }
        
        for (int i = 0; i < canvas.transform.childCount;i++ )
        {
            var child = canvas.transform.GetChild(i);
            var graphic = child.GetComponent<Graphic>();
            graphic.color = new Color(graphic.color.r, graphic.color.g, graphic.color.b, 0);
        }
        loadOver = false;
        childIndex = 0;
        childtimer = 0;
        timer = 0f;
        timer2 = 0f;
        childtimer = 0f;
        fadingIn = true;
        textIn = true;
        initialPosition = Vector2.zero;
        Debug.Log("s");
    }

    private void Moving(Flow flow)
    {
        if(textMeshProUGUI != null)
        {
            if(textIn)
            {
                timer2 += Time.deltaTime;
                float t = Mathf.Clamp01(timer2 / duration);
                Vector2 newPosition = Vector2.Lerp(initialPosition, targetPosition, t);
                rectTransform.anchoredPosition = newPosition;
                if (timer2 >= duration)
                {
                    textIn = false;
                }
            }
        }
    }

    private void Fading(Flow flow)
    {
        var child = canvas.transform.GetChild(childIndex);
        Graphic graphic = child.GetComponent<Graphic>();

        if (fadingIn)
        {
            childtimer += Time.deltaTime;
            if (childtimer >= duration)
            {
                fadingIn = false;
            }
        }
        else
        {
            childtimer -= Time.deltaTime;
            if (childtimer <= 0)
            {
                fadingIn = true;
            }
        }

        float alpha = Mathf.Clamp01(childtimer / duration);
        graphic.color = new Color(graphic.color.r, graphic.color.g, graphic.color.b, alpha);
    }

    private void LoadUiFaded(Flow flow)
    {
        if (childIndex >= canvas.transform.childCount - 1)
        {
            loadOver = true;
            return;
        }
        var child = canvas.transform.GetChild(childIndex);
        Graphic graphic = child.GetComponent<Graphic>();

        childtimer += Time.deltaTime;
        float alpha = Mathf.Clamp01(childtimer / duration);
        graphic.color = new Color(graphic.color.r, graphic.color.g, graphic.color.b, alpha);

        if (childtimer >= duration)
        {
            childIndex++;
            childtimer = 0;
        }
    }
}