using System;
using UnityEngine;
using UnityEngine.Networking;
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using Newtonsoft.Json;
using UnityEngine.SceneManagement;
using UnityEditor;
using Cinemachine;

/* 使用login token进行登录和数据读取保存
 * TestDataInjection 是测试用的假数据注入
 * LoginTokenCheck 验证login token是否有效，和服务器比对
 */
public class LoginController : MonoBehaviour
{
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    private GameObject canvasPlaceholder, regCanvas, initDogCanvas, loginCanvas;

    void Start()
    {
        //启动自动采用Login Token 登录。其他登录方式为手动登录。
        StartCoroutine(LoginTokenPost());
        canvasPlaceholder = GameObject.Find("Canvas Placeholder");
        regCanvas = canvasPlaceholder.transform.Find("Register Canvas").gameObject;
        initDogCanvas = canvasPlaceholder.transform.Find("Init Dog Canvas").gameObject;
        loginCanvas = canvasPlaceholder.transform.Find("Login Canvas").gameObject;

        // 判断是否要切换到注册狗的子场景
        if ( GameData.subScene == "Login_InitDog")
        {
            SwitchToInitDogScene();
            GameData.subScene = null;
        }
    }

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



    // LoginToken登录方法
    IEnumerator LoginTokenPost()
    {
        //yield return null;      // 跳过第一帧（可以考虑去掉，数据加载已经移到awake()了。
        string UUID = SystemInfo.deviceUniqueIdentifier; // 这里需要考虑这段代码执行在Enviroment Controller之前
        string LoginToken = PlayerPrefs.GetString("LoginToken", null);
        string LoginTokenTime = PlayerPrefs.GetString("LoginTokenTime", null);

        // todo 比较LoginTokenTime 如果超时直接放弃后面代码。比较UUID是否是null如果是直接放弃后面代码
        if (LoginToken == null) { yield break; };
        if (LoginTokenTime == null) { yield break; };
        DateTime tokenTime;
        DateTime now = DateTime.Now;
        if (DateTime.TryParse(LoginTokenTime, out tokenTime))
        {
            TimeSpan span = now - tokenTime;
            if (span.TotalHours > 7 * 24)
            {
                yield break;
            }
        }
        else { yield break; }

        // 提交POST
        string url = "/api/login/token/";
        WWWForm form = new();
        form.AddField("login_token", LoginToken);
        form.AddField("UUID", UUID);

        StartCoroutine(WebController.PostRequest(url, form, callback:LoginTokenCallback));
    }

    // Post之后callback的函数
    void LoginTokenCallback(string json)
    {
        var data = JsonConvert.DeserializeObject<Dictionary<string, string>>(json);
        if (data != null && data["status"] == "success") {
            PlayerPrefs.SetString("LoginToken", data["login_token"]);
            PlayerPrefs.SetString("LoginTokenTime", DateTime.Now.ToString());
            EnviromentSetting.accessToken = data["access_token"];
            EnviromentSetting.accessTokenReceivedTime = DateTime.Now;
            UserProperty.userId = data["user_id"];
            // todo 用user id 获取用户数据并保存
        }
        if (UserProperty.userId != null && EnviromentSetting.accessToken != null)
        { 
            // 判断用户狗的数量，如果为0就跳转用户创建狗。
            if (UserProperty.dogs.Count < 1)
            {
                SwitchToInitDogScene();
            }
             else
            {
                SceneManager.LoadScene("Home");
                
            }
        }
    }

    // Quick Start 登录方式，用UUID换取Login Token
    public void QuickStart()
    {
        string url = "/api/game/quick_start/";
        Dictionary<string, string> formData = new();
        WWWForm form = new();
        form.AddField("UUID", EnviromentSetting.UUID);
        StartCoroutine(WebController.PostRequest(url, form, callback: QuickStartCallback));
    }

    void QuickStartCallback(string json)
    {
        var data = JsonConvert.DeserializeObject<Dictionary<string, string>>(json);
        if (data != null && data["status"] == "success")
        {
            PlayerPrefs.SetString("LoginToken", data["login_token"]);
            UserProperty.userId = data["user_id"];
            StartCoroutine(LoginTokenPost());
        }
    }

    // 切换到生成狗的子场景
    void SwitchToInitDogScene()
    {
        initDogCanvas.SetActive(true);
        loginCanvas.SetActive(false);
        regCanvas.SetActive(false);
        var loginCam = GameObject.Find("V Cam Login").GetComponent<CinemachineVirtualCamera>();
        var initDogCam = GameObject.Find("V Cam Init Dog").GetComponent<CinemachineVirtualCamera>();
        loginCam.Priority = 0;
        initDogCam.Priority = 10;
    }
}