using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.Networking;

/// <summary>
/// 数据加载器
/// </summary>
/// <typeparam name="T">数据类型</typeparam>
public class DataLoader<T>
{
    /// <summary>
    /// 数据对象列表
    /// </summary>
    public static List<T> DataList;

    public static Dictionary<string, T> DataDics;

    /// <summary>
    /// 加载数据
    /// </summary>
    /// <param name="dataFileName">数据文件名</param>
    /// <param name="DataLoaded">加载后处理程序</param>
    public static IEnumerator LoadDataDictionary(string dataFileName, UnityAction DataLoaded = null)
    {
        string filename = CommonData.DataFullPath + dataFileName;
        // Debug.Log(filename);
        UnityWebRequest www = UnityWebRequest.Get(filename);
        yield return www.SendWebRequest();
        if (www.result == UnityWebRequest.Result.ConnectionError)
        {
            Debug.Log(www.error);
        }

        if (www.isDone)
        {
            string data = www.downloadHandler.text;
            if (!string.IsNullOrEmpty(data))
            {
                if (DataDics != null)
                {
                    DataDics.Clear();
                }

                //Debug.Log(filename + ":" + data);
                DataDics = JsonTools.DicFromJson<string,T>(data);
            }
            if (DataLoaded != null)
            {
                DataLoaded();
            }
        }
    }

    /// <summary>
    /// 加载数据
    /// </summary>
    /// <param name="dataFileName">数据文件名</param>
    /// <param name="DataLoaded">加载后处理程序</param>
    public static IEnumerator LoadDataList(string dataFileName, UnityAction DataLoaded = null)
    {
        string filename = CommonData.DataFullPath + dataFileName;
        // Debug.Log(filename);
        UnityWebRequest www = UnityWebRequest.Get(filename);
        yield return www.SendWebRequest();
        if (www.result == UnityWebRequest.Result.ConnectionError)
        {
            Debug.Log(www.error);
        }

        if (www.isDone)
        {
            string data = www.downloadHandler.text;

            if (!string.IsNullOrEmpty(data))
            {
                if (DataList != null)
                {
                    DataList.Clear();
                }
                //Debug.Log(filename + ":" + data);
                DataList = JsonTools.ListFromJson<T>(data);

                //Dictionary<string, T> dt = new Dictionary<string, T>();
                //foreach (var item in DataList)
                //{
                //    if (item is Data)
                //    {
                //        dt.Add((item as Data).ObjectID, item);
                //    }
                //}
                // Debug.Log(JsonTools.DicToJson(dt));

                if (DataLoaded != null)
                {
                    DataLoaded();
                }
            }
        }
    }

    /// <summary>
    /// 加载数据
    /// </summary>
    /// <param name="dataFileName">数据文件名</param>
    /// <param name="DataLoaded">加载后处理程序</param>
    public static IEnumerator ListToDic(string dataFileName)
    {
        string filename = CommonData.DataFullPath + dataFileName;
        // Debug.Log(filename);
        UnityWebRequest www = UnityWebRequest.Get(filename);
        yield return www.SendWebRequest();
        if (www.result == UnityWebRequest.Result.ConnectionError)
        {
            Debug.Log(www.error);
        }

        if (www.isDone)
        {
            string data = www.downloadHandler.text;

            if (!string.IsNullOrEmpty(data))
            {
                List<T> DataList = JsonTools.ListFromJson<T>(data);
                Dictionary<string, T> dt = new Dictionary<string, T>();
                foreach (var item in DataList)
                {
                    if (item is Data)
                    {
                        dt.Add((item as Data).ObjectID, item);
                    }
                }
                Debug.Log(JsonTools.DicToJson(dt));
            }
        }
    }
}