using UnityEngine;
using WI;
using UnityEngine.UI;
using System.Collections;
using UnityEngine.SceneManagement;
using TMPro;

namespace Samkwang
{
    public class Panel_BranchLoading : MonoBehaviour
    {
        public TextMeshProUGUI Text_Branch;
        public Image Image_BranchThumbnail;
        public Slider Slider_LoadingProgress;
        public TextMeshProUGUI Text_Loading;

        public float progressSpeed;
        public string nextSceneName;

        public void Init()
        {
            var textDict = transform.GetChildComponentsByName<TextMeshProUGUI>();
            Text_Branch = textDict.GetOrNull(nameof(Text_Branch));

            var mask = transform.GetComponentInChildren<Mask>(true);
            Image_BranchThumbnail = mask.transform.Find("Image_BranchThumbnail").GetComponent<Image>();
            Slider_LoadingProgress = transform.GetComponentInChildren<Slider>(true);
            Text_Loading = Slider_LoadingProgress.transform.parent.GetComponentInChildren<TextMeshProUGUI>();
        }
        public void LoadBranch(UI_BranchLocation branchLocation)
        {
            transform.SetAsLastSibling();
            gameObject.SetActive(true);

            Text_Branch.SetText(branchLocation.BranchName.text);
            Image_BranchThumbnail.sprite = branchLocation.branchThumbnail;
            nextSceneName = branchLocation.sceneName;

            StopAllCoroutines();
            StartCoroutine(WaitAndLoad());
        }
        private IEnumerator WaitAndLoad()
        {
            yield return null;
            yield return StartCoroutine(LoadNextSceneAsync());
        }

        IEnumerator LoadNextSceneAsync()
        {
            AsyncOperation asyncOp = SceneManager.LoadSceneAsync(nextSceneName);
            asyncOp.allowSceneActivation = false;

            float displayedProgress = 0f;

            while (!asyncOp.isDone)
            {
                float targetProgress = Mathf.Clamp01(asyncOp.progress / 0.9f);
                displayedProgress = Mathf.MoveTowards(displayedProgress, targetProgress, Time.deltaTime * progressSpeed);

                Slider_LoadingProgress.value = displayedProgress;
                Text_Loading.SetText($"Loading..({(displayedProgress * 100f).ToString("F0")}%)");

                if (asyncOp.progress >= 0.9f && displayedProgress >= 0.99f)
                {
                    Slider_LoadingProgress.value = 1f;
                    Text_Loading.SetText($"Loading..(100%)");
                    yield return new WaitForSeconds(0.5f);
                    asyncOp.allowSceneActivation = true;
                }

                yield return null;
            }
        }
    }
}