using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using UnityEngine;
using UnityEngine.AddressableAssets;
using UnityEngine.AddressableAssets.ResourceLocators;
using UnityEngine.Events;
using UnityEngine.ResourceManagement.AsyncOperations;

public class AddressableManager : MonoBehaviour
{
    [SerializeField]
    string preloadLabelName = "preload";

    public UnityAction OnInitialized;
    public UnityAction<bool> NotifiyCatalogUpdated;
    public UnityAction<long> NotifiySizeDownloaded;
    public UnityAction<bool> NotifiyDownloadFinished;
    public UnityAction<bool> OnSucceedLoadOutGameObject;
    public UnityAction<bool> OnSucceedLoadOutGameImage;
    public UnityAction<bool> OnSucceedLoadInGameObject;
    public UnityAction<bool> OnSucceedLoadInGameImage;

    private AsyncOperationHandle DownloadHandle;
    private bool isInitialized = false;
    private long totalDownloadSize;

    private float dataLoadPercent;
    public float DataLoadPercent
    {
        get { return dataLoadPercent; }
    }

    private void Start()
    {
        Addressables.InitializeAsync().Completed += Initialized;
    }

    public void DownloadData()
    {
        Debug.Log("base: AddressableManager: DownloadData");

        if (isInitialized == false)
        {
            Addressables.InitializeAsync().Completed += (result) =>
            {
                isInitialized = true;

                UpdateCatalog();
                OnInitialized?.Invoke();
            };
        }
        else
        {
            UpdateCatalog();
        }
    }

    public float GetDownloadDataPercent()
    {
        return DownloadHandle.IsValid() ? DownloadHandle.PercentComplete : 0.0f;
    }

    public bool IsDownloadValid()
    {
        return DownloadHandle.IsValid();
    }

    private void Initialized(AsyncOperationHandle<IResourceLocator> result)
    {
        Debug.Log("base: AddressableManager: OnInitialized");

        isInitialized = true;
        OnInitialized?.Invoke();
    }

    private void UpdateCatalog()
    {
        Debug.Log("base: AddressableManager: UpdateCatalog");

        Addressables.CheckForCatalogUpdates().Completed += (result) =>
        {
            Debug.Log("base: AddressableManager: CheckForCatalogUpdates");

            var catalogToUpdate = result.Result;
            if (catalogToUpdate.Count > 0)
            {
                Addressables.UpdateCatalogs(catalogToUpdate).Completed += OnCatalogUpdated;
            }
            else
            {
                StartDownloadData();
                NotifiyCatalogUpdated?.Invoke(true);
            }
        };
    }

    private void OnCatalogUpdated(AsyncOperationHandle<List<IResourceLocator>> result)
    {
        Debug.Log("base: AddressableManager: OnCatalogUpdated");

        if (result.Status == AsyncOperationStatus.Succeeded)
        {
            DownloadSize();

            NotifiyCatalogUpdated?.Invoke(true);
        }
        else
        {
            NotifiyCatalogUpdated?.Invoke(false);
        }
    }

    private void DownloadSize()
    {
        Debug.Log("base: AddressableManager: DownloadSize");

        Addressables.GetDownloadSizeAsync(preloadLabelName).Completed += OnSizeDownloaded;
    }

    private void OnSizeDownloaded(AsyncOperationHandle<long> result)
    {
        Debug.Log("base: AddressableManager: OnSizeDownloaded");

        totalDownloadSize = result.Result;
        StartDownloadData();

        NotifiySizeDownloaded?.Invoke(totalDownloadSize);
    }

    private void StartDownloadData()
    {
        Debug.Log("base: AddressableManager: StartDownloadData");

        DownloadHandle = Addressables.DownloadDependenciesAsync(preloadLabelName);
        DownloadHandle.Completed += OnDependenciesDownloaded;
        
        Addressables.Release(DownloadHandle);
    }

    private void OnDependenciesDownloaded(AsyncOperationHandle result)
    {
        Debug.Log("base: AddressableManager: OnDependenciesDownloaded");

        switch (result.Status)
        {
            case AsyncOperationStatus.Succeeded:
                Debug.Log("base: AddressableManager: OnDependenciesDownloaded: Succeeded");
                NotifiyDownloadFinished?.Invoke(true);
                break;

            case AsyncOperationStatus.Failed:
                Debug.Log("base: AddressableManager: OnDependenciesDownloaded: Failed");
                NotifiyDownloadFinished?.Invoke(false);
                break;

            case AsyncOperationStatus.None:
                Debug.Log("base: AddressableManager: OnDependenciesDownloaded: None");
                NotifiyDownloadFinished?.Invoke(false);
                break;
        }

    }
}