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

namespace UltraCombos.Marvel.DrawHeroes
{
    public class SceneLoader : MonoBehaviour
    {
        [Configuration.Config]
        [Range(0, 300)]
        public float duration = 0.0f;
        float duration_stamp;
        
        public string scenePath = "MainScene";

        bool is_scene_loading = false;
        ImageFader fader;

        [System.Serializable]
        public class CountdownEvent : UnityEvent<float, float> { }
        [Space(10)]
        public CountdownEvent onCountdown = new CountdownEvent();
        public UnityEvent onLoadScene = new UnityEvent();

        private void Start()
        {
            Configuration.GrpcServer.Instance.LoadSettings();

            duration_stamp = Time.time;
            fader = GetComponent<ImageFader>();
            if (fader == null) fader = gameObject.AddComponent<ImageFader>();

        }

        private void Update()
        {
            if (duration > 0.0f && is_scene_loading == false)
            {
                float elapsed_time = Time.time - duration_stamp;
                if (elapsed_time > duration)
                {
                    LoadScene();
                }
                else
                {
                    onCountdown.Invoke(duration, elapsed_time);
                }
            }
        }

        public void LoadScene()
        {
            if (is_scene_loading)
                return;
            is_scene_loading = true;
            fader.SetActive(true);
            //onLoadScene.Invoke();
            //UnityEngine.SceneManagement.SceneManager.LoadScene(scenePath);
            StartCoroutine(OnLoadSceneAsync());
        }

        private IEnumerator OnLoadSceneAsync()
        {
            onLoadScene.Invoke();

            yield return new WaitForSeconds(1.0f);
            yield return UnityEngine.SceneManagement.SceneManager.LoadSceneAsync(scenePath);
        }
    }

}