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

public class LoadingScreen : MonoBehaviour
{
    private string text = "Chargement des videos";
    [SerializeField] private TMPro.TextMeshProUGUI loadingText;

    [SerializeField] private Slider loadingBar;
    [SerializeField] private TMPro.TextMeshProUGUI loadingBarText;

    [SerializeField] private float loadingBarSpeed = 1;

    [SerializeField] private float hideAtPercent = 0.3f;

    private float loadingBarValue = 0;

    void Start()
    {
        loadingBar.gameObject.SetActive(false);
        loadingBar.value = 0;
        loadingBarText.text = "";
    }

    void Update()
    {
        loadingBar.value = loadingBarValue;
    }

    IEnumerator ShowLoadingScreen()
    {
        float delay = 0.4f;
        while (true)
        {
            loadingText.text = text;
            yield return new WaitForSeconds(delay);
            loadingText.text = text + ".";
            yield return new WaitForSeconds(delay);
            loadingText.text = text + "..";
            yield return new WaitForSeconds(delay);
            loadingText.text = text + "...";
            yield return new WaitForSeconds(delay);
        }
    }

    IEnumerator SmoothLoadingBar()
    {
        while (true)
        {
            loadingBarValue = Mathf.Lerp(loadingBarValue, loadingBar.value, Time.deltaTime * loadingBarSpeed);
            yield return null;
        }
    }

    public void Show(int total)
    {
        gameObject.SetActive(true);
        StartCoroutine(ShowLoadingScreen());
        StartCoroutine(SmoothLoadingBar());
        loadingBarValue = 0;
        loadingBarText.text = "0 / " + total;
    }

    public void Hide()
    {
        StopAllCoroutines();
        gameObject.SetActive(false);
    }

    private int TotalVideos => GameManager.singleton.VideoDownloader.VideoAssets.Count;

    public void ProgressCallback(int current, int total)
    {
        if (!gameObject.activeSelf) return;
        loadingBar.gameObject.SetActive(true);
        float progress = (float)current / total;
        loadingBarValue = progress;
        loadingBarText.text = $"{current} / {TotalVideos}";
        Debug.Log($"Progress: {progress} ({current} / {total}) percentAt: {hideAtPercent}");
        if (progress > hideAtPercent)
        {
            Hide();
        }
    }
}