using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class FlakeIcon : SnowFlake
{

    public enum IconState
    {
        Spwan,
        SpwanFinished,
        Disappear,
        DisappearFinished,
        Video,
        End,
        Reset,
    }

    public IconState State;
    public AnimationCurve SpawnCurve;
    public AnimationCurve DisappearCurve;
    public float SpwanSpeed = 1;
    public float DisappearSpeed = 1;
    private RawImage Img;
    private RectTransform rectTransform;
    public float FlakeWaitTime = 1;

    private new void Awake()
    {
        base.Awake();
        Img = GetComponent<RawImage>();
        rectTransform = GetComponent<RectTransform>();
    }

    // Start is called before the first frame update
    void Start()
    {

    }

    public void Update()
    {
        if (_animator.GetCurrentAnimatorStateInfo(0).IsName(End) && State == IconState.Video)
        {
            State = IconState.End;
            StartCoroutine(EndFade());
        }

        if (State == IconState.SpwanFinished || State == IconState.Spwan)
        {
            PerlinPos();
        }

    }

    [Range(1, 30)] public float perlinPosScale = 1;
    [Range(0,2)] public float TimeScale = 1;
    [Range(0, 1)] public float smooth = 0.1f;
    private void PerlinPos()
    {
        
        float perlinValueX = Mathf.PerlinNoise((Time.time + _snowFlakeBehaviour._rectTransform.anchoredPosition.x) * TimeScale, 0);
        float perlinValueY = Mathf.PerlinNoise(0, (Time.time + _snowFlakeBehaviour._rectTransform.anchoredPosition.y) * TimeScale);
        float valueX = Mathf.Lerp(-perlinPosScale, perlinPosScale, perlinValueX);
        float valueY = Mathf.Lerp(-perlinPosScale, perlinPosScale, perlinValueY);
        float Xvalue = rectTransform.anchoredPosition.x + rectTransform.anchoredPosition.y;
        rectTransform.anchoredPosition += (new Vector2(valueX, valueY) - rectTransform.anchoredPosition) * smooth;
    }


    IEnumerator EndFade()
    {
        float time = 1;
        Color color = Img.color;
        while (time > 0)
        {
            time = Mathf.Max(0, time - Time.deltaTime);
            color.a = time;
            Img.color = color;
            yield return null;
        }
        Reset();
    }


    public override void PlayAnimation()
    {
        State = IconState.Spwan;
        rectTransform.anchoredPosition = Vector2.zero;
        StartCoroutine(GoSpawn());
    }

    IEnumerator GoSpawn()
    {
        _animator.SetTrigger("Play");
        rectTransform.sizeDelta = Vector2.one * _snowFlakeBehaviour.IconSize;
        float time = 0;
        float value = SpawnCurve.Evaluate(time);

        rectTransform.localScale = Vector3.one * value;
        var color = Img.color;
        color.a = value;
        Img.color = color;
        while (time < 1)
        {
            time = Mathf.Min(1, time + SpwanSpeed * Time.deltaTime);
            value = SpawnCurve.Evaluate(time);
            rectTransform.localScale = Vector3.one * value;
            color.a = value;
            Img.color = color;
            yield return null;
        }
        State = IconState.SpwanFinished;
    }

    public override void Trigger()
    {
        if (State != IconState.SpwanFinished)
            return;
        State = IconState.Disappear;
        StartCoroutine(GoDisappear());
    }

    IEnumerator GoDisappear()
    {
        float time = 1;
        float value = SpawnCurve.Evaluate(time);

        rectTransform.localScale = Vector3.one * value;
        var color = Img.color;
        color.a = value;
        Img.color = color;
        while (time > 0)
        {
            time = Mathf.Max(0, time - DisappearSpeed * Time.deltaTime);
            value = SpawnCurve.Evaluate(time);
            rectTransform.localScale = Vector3.one * value;
            color.a = value;
            Img.color = color;
            yield return null;
        }

        State = IconState.DisappearFinished;
        rectTransform.sizeDelta = Vector2.one * _snowFlakeBehaviour.FlakeSize;
        _animator.SetTrigger("Flake");

        yield return null;

        State = IconState.Video;

        Img.color = Color.white;
        rectTransform.localScale = Vector3.one;

        yield return new WaitForSeconds(FlakeWaitTime);
    }

    public override void Reset()
    {
        State = IconState.Reset;
        _snowFlakeBehaviour.ResetFlake();
        _animator.SetTrigger("Play");
    }



}