using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.Serialization;

public class ShaderControlValue : MonoBehaviour
{
    [Space(10)]
    public List<string> nameOn;
    public List<ShaderValue> values_Init;
    public List<ShaderValue> values_Play;
    [Space(10)]
    public bool isPlay = false;
    public bool LOOP = false;
    [Space(10)]
    [Range(0, 5)]
    public float duration = 3f;

    Material material;
    float durationSum = 0;
    float timeCurve;

    [Space(10)]
    public Material mat;
    Material matCopy;
    public Material InitPlay()
    {
        if (matCopy == null && mat != null)
            matCopy = new Material(mat);

        if (matCopy)
        {
            InitPlay(matCopy);
            return matCopy;
        }
        return null;
    }
    public void InitPlay(Material mat)
    {
        material = mat;
        Play();
    }
    public void Init(Material mat, bool PLAY = false, bool LOOP = false)
    {
        material = mat;

        if (PLAY)
        {
            this.LOOP = LOOP;
            Play();
        }
    }
    void Update()
    {
        if (isPlay && material != null)
        {
            durationSum += Time.deltaTime;
            timeCurve = durationSum / duration;

            for (int i = 0; i < values_Play.Count; i++)
                material.SetFloat($"{values_Play[i].name}", values_Play[i].value * values_Play[i].curve.Evaluate(timeCurve));

            if (isPlay && duration < durationSum)
            {
                durationSum = 0;

                if (!LOOP)
                {
                    if (OnEnd != null)
                        OnEnd();

                    if (KEEP)
                    {
                        isPlay = false;
                        enabled = isPlay;
                    }
                    else
                    {
                        Play(false, false, null);

                        OnEndPlay();
                    }
                }
            }
        }
    }

    System.Action OnEnd;
    bool KEEP = false;
    public void Play(bool isPlay, bool LOOP, System.Action OnEnd, bool KEEP = false)
    {
        this.isPlay = isPlay;
        this.LOOP = LOOP;
        this.OnEnd = OnEnd;
        this.KEEP = KEEP;

        enabled = isPlay;
    }
    public void Play()
    {
        isPlay = true;

        enabled = isPlay;
    }
    public void Stop()
    {
        if (isPlay)
        {
            if (OnEnd != null)
                OnEnd();

            isPlay = false;
            enabled = isPlay;
        }
    }

    [Serializable]
    public class EndEvent : UnityEvent { }
    [FormerlySerializedAs("onEnd")]
    [SerializeField]
    private EndEvent m_OnEnd = new EndEvent();
    public EndEvent OnPlayEnd
    {
        get { return m_OnEnd; }
        set { m_OnEnd = value; }
    }
    public void OnEndPlay()
    {
        OnPlayEnd.Invoke();
    }
}