using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.SceneManagement;


/* 本文件二次封装Web request
 * 不需要客户端确认是否需要提交accss_token，access_token白名单在EnviromentSetting里面
 * PostRequest 需要提交url, wwwForm, 上传附件path, 回调函数
 */

public class WebController : MonoBehaviour
{

    // Start is called before the first frame update
    //void Start()
    //{

    //}

    // Update is called once per frame
    //void Update()
    //{

    //}

    public static IEnumerator PostRequest(string url, WWWForm wwwForm, string filePath = null, System.Action<string> callback = null)
    {
        while (string.IsNullOrEmpty(EnviromentSetting.serverIP))
        {
            // 等待服务器IP被设置
            yield return new WaitForSeconds(0.1f);
        }
        // 检测是否需要添加access_token
        bool accessTokenReq = true;
        if (EnviromentSetting.accessTokenWhiteList.Contains<string>(url))
        {
            accessTokenReq = false;
        }

        // 添加access token
        if (accessTokenReq)
        {
            // 如果access token过期，跳转登录场景
            TimeSpan ts = DateTime.Now - EnviromentSetting.accessTokenReceivedTime;
            if (ts.TotalHours >= 24)
            {
                GameData.subScene = null;
                SceneManager.LoadScene("Login");
            }
            else
            {
                wwwForm.AddField("access_token", EnviromentSetting.accessToken);
            }
        }

        // 添加文件
        if (filePath != null)
        {
            byte[] fileData = System.IO.File.ReadAllBytes(filePath);
            wwwForm.AddBinaryData(Path.GetFileNameWithoutExtension(filePath), fileData);
        }

        wwwForm.AddField("date_time", DateTime.Now.ToString());        // 可选项，以服务器时间为准

        // 创建 UnityWebRequest 对象
        url = EnviromentSetting.serverIP + url;
        using (UnityWebRequest request = UnityWebRequest.Post(url, wwwForm))
        {
            // 发送请求并等待响应
            yield return request.SendWebRequest();

            // 检查是否有错误
            if (request.result == UnityWebRequest.Result.ConnectionError || request.result == UnityWebRequest.Result.ProtocolError)
            {
                Debug.Log("上传失败: " + request.error);
                if (request.error == "Cannot connect to destination host")
                {
                    string msg = GameTool.GetValueAtPath(EnviromentSetting.languageData, new string[] { "game_message", "network_error", EnviromentSetting.languageCode });
                    MessageBoxController.ShowMessage(msg, () => Application.Quit());
                }
                Debug.Log("上传失败信息: " + request.downloadHandler.text);
            }
            else
            {
                // 上传成功，获取服务器响应
                string responseText = request.downloadHandler.text;
                callback?.Invoke(responseText);
                Debug.Log("上传成功！服务器响应: " + responseText);
            }
        }
    }

    public static IEnumerator ServerAliveCheck()
    {
        string url = "/api/server/alive/";
        int serverIPIndex = 0;
        foreach (string serverIP in EnviromentSetting.serverIPs)
        {
            string fullUrl = serverIP + url;
            using (UnityWebRequest request = UnityWebRequest.Get(fullUrl))
            {
                yield return request.SendWebRequest();

                if (request.result == UnityWebRequest.Result.ConnectionError || request.result == UnityWebRequest.Result.ProtocolError)
                {
                    Debug.Log("服务器不可用: " + fullUrl + ": " + request.error);
                    serverIPIndex++;
                }
                else
                {
                    Debug.Log("服务器可用: " + fullUrl);
                    EnviromentSetting.serverIP = serverIP; // 更新当前使用的服务器IP
                    yield break; // 如果有一个服务器可用，直接返回
                }
            }
        }

        if (serverIPIndex >= EnviromentSetting.serverIPs.Length)
        {
            string msg = GameTool.GetValueAtPath(EnviromentSetting.languageData, new string[] { "game_message", "network_error", EnviromentSetting.languageCode });
            MessageBoxController.ShowMessage(msg, () => Application.Quit());
            Application.Quit();
            Debug.LogError("所有服务器都不可用，退出游戏");
        }
    }
}