using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;
using AIPagedLod;
using UnityEngine.Networking;
using LitJson;

public class DownloadTileFileManager : MonoBehaviour
{
    public static DownloadTileFileManager mInstance;
    public List<UnityWebRequest> mDownloadWWWList = new List<UnityWebRequest>();
    public int mMaxCoroutineCount = 2;
    public int mCurrentCoroutineCount = 0;
    void Awake()
    {
        mInstance = this;
    }

    void Update()
    {
        mDownloadWWWList.RemoveAll(item => item.isDone);
        mCurrentCoroutineCount = mDownloadWWWList.Count;
    }

    public bool CanDownload()
    {
        return mDownloadWWWList.Count < mMaxCoroutineCount;
    }

    public void StartDownloadTileFile(LoadDataFromUrl loader,TileUrlInfo info)
    {
        StartCoroutine(DownloadTileFile(loader,info));
    }

    public IEnumerator DownloadTileFile(LoadDataFromUrl loadDataFromUrl, TileUrlInfo info)
    {
        string url = info.mTileFileUrl;
        UnityWebRequest www = UnityWebRequest.Get(url);
        www.timeout = 10;
        yield return www.SendWebRequest();
        if (www.isHttpError || www.isNetworkError)
        {
            Debug.Log(www.error + " " + url);
        }
        else
        {
            B3dmFileLoader loader = new B3dmFileLoader();
            loader.LoadObjectMeshInfoFromData(www.downloadHandler.data);
            loader.mTileName = info.mBasicInfo.mContent;
            loader.mTileDirPath = info.mBasicInfo.mContent;
            PagedLod pagedLod = LoadPagedLodFromFileManager.LoadPagedLod(loader, loadDataFromUrl.mCurrentLoadManager.transform);
            pagedLod.mBasicInfo = info.mBasicInfo;
            pagedLod.mBasicInfoDict = info.mBasicInfoDict;
            pagedLod.LoadB3dmBasicInfo(loader);
            pagedLod.GetMeshRenders();
            pagedLod.mIsRootTile = true;
            pagedLod.mSelfLevel = 14;
            LoadPagedLodFromFileManager.GenerateColliderObject(pagedLod);
            loadDataFromUrl.DoLoadTileFileFinished();
        }
    }

}