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

public class SetChoiceEffect : MonoBehaviour
{

    [SerializeField]
    public RawImage rawImage;

    Material material;

    public float FlashDuration = 0.1f; // Duration for the flash effect
    public float FadeDuration = 1.0f; // Duration for the fade effect

    public float MinFadeAmount = 0.2f; // Minimum fade amount for discard effect
    public int FlashCount = 3; // Number of flashes for discard effect
    public float ShortFadeDuration = 0.1f; // Duration for short fade effect

    public float ImageOffsetY = 0.05f; // Offset for the image in the shader

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

        if (rawImage == null)
        {
            rawImage = GetComponentInChildren<RawImage>();
        }

        if (rawImage != null)
        {
            material = rawImage.material;
            // material = rawImage.GetComponent<Renderer>().material;
            setChoice("reset"); // Set default effect
        }
        else
        {
            Debug.LogError("RawImage component not found on this GameObject.");
        }
    }

    // Update is called once per frame
    void Update()
    {
        material.SetFloat("_OffsetY", ImageOffsetY);

    }


    private IEnumerator FadeCoroutine(string name, float from, float to, float duration, Action onComplete = null, float delay = 0f)
    {
        if (delay > 0f)
            yield return new WaitForSeconds(delay);

        float elapsedTime = 0f;
        while (elapsedTime < duration)
        {
            float t = elapsedTime / duration;
            // Ease in-out (smoothstep)
            float easeT = t * t * (3f - 2f * t);
            float value = Mathf.Lerp(from, to, easeT);

            material.SetFloat(name, value);
            elapsedTime += Time.deltaTime;
            yield return null;
        }
        material.SetFloat(name, to); // Ensure final value is set
        
        onComplete?.Invoke(); // Invoke the callback if provided
    }
    public void Reset()
    {
        if (material != null)
        {
            // material.SetFloat("_BloomIntensity", MinBloomAmount);
            // material.SetFloat("_BloomThreshold", MaxBloomThreshold);
            material.SetFloat("_FadeAmount", 1.0f);
            material.SetFloat("_FlashAmount", 0.0f);
        }
        else
        {
            Debug.LogError("Material is not assigned.");
        }
    }
    public void setChoice(string type)
    {
        switch (type)
        {
            case "save":

                material.SetFloat("_FadeAmount", 1.0f);

                StartCoroutine(FadeCoroutine("_FlashAmount", 0.0f, 1.0f, FlashDuration / 2,
                    () =>
                    {
                         StartCoroutine(FadeCoroutine("_FlashAmount", material.GetFloat("_FlashAmount"), 0.0f, FlashDuration / 2, () =>
                        {
                            StartCoroutine(FadeCoroutine("_FadeAmount", material.GetFloat("_FadeAmount"), 0.0f, FadeDuration));
                        }, FlashDuration));

                    }
                ));


                break;
            case "discard":
                                
                for (int i = 0; i < FlashCount; ++i)
                {
                    StartCoroutine(FadeCoroutine("_FadeAmount", 1.0f, MinFadeAmount, ShortFadeDuration, () =>
                    {
                        StartCoroutine(FadeCoroutine("_FadeAmount", MinFadeAmount, 1.0f, ShortFadeDuration));
                    }, i * ShortFadeDuration * 2));

                }
                StartCoroutine(FadeCoroutine("_FadeAmount", material.GetFloat("_FadeAmount"), 0.0f, FadeDuration, null, ShortFadeDuration * FlashCount * 2));

                break;
            case "reset":
                Reset();
                break;
            default:
                Debug.LogWarning("Unknown effect type: " + type);

                break;
        }
    }
}