// Services.UserLoginHelper
using System;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Security;
using Models;
using Models.ModelItems;
using Models.View;
using Services.Cache;
using Services.Extensions;
using Services.Manager;
using Services.Tool;

public class UserLoginHelper
{
    private static string CookieName_User = (ConfigHelper.GetConfigString("DBName") + "_UserInfo").ToMD5();

    private static string CookieName_Token = (ConfigHelper.GetConfigString("DBName") + "_TokenInfo").ToMD5();

    /// <summary>
    /// ....
    /// </summary>
    /// <returns></returns>
    public static View_UserInfo CurrentUser()
    {
        View_UserInfo user = HttpContext.Current.Session[CookieName_User] as View_UserInfo;
        if (user != null && CacheHelp.cacheSysUserInfo.FirstOrDefault(a => a.Pwd == user.Pwd && a.Uid == user.Uid && a.IsValid >=2 ) != null)
        {
            Logs.WriteLog("user值" + user.Uid);
            return user;
        }
        if (HttpContext.Current.Session["ras"] != null && HttpContext.Current.Request.Cookies[CookieName_User] != null && HttpContext.Current.Request.Cookies[CookieName_Token] != null)
        {
            RSA rSA = HttpContext.Current.Session["ras"] as RSA;
            string keyword = HttpUtility.UrlDecode(HttpContext.Current.Request.Cookies[CookieName_User].Value).Trim().ToLower();
            Logs.WriteLog("keyword" + keyword);
            string value = HttpUtility.UrlDecode(HttpContext.Current.Request.Cookies[CookieName_Token].Value);
            Logs.WriteLog("value"+value);
            string pwd = (string.IsNullOrEmpty(rSA.DecodeOrNull(value)) ? "" : rSA.DecodeOrNull(value));
            View_UserInfo view_UserInfo =  CacheHelp.cacheSysUserInfo.First(a => a.Uid == keyword);
            UserInfo usernew = new UserInfo() { Uid = keyword.Trim().ToLower(), Pwd = pwd, CreateTime = view_UserInfo.CreateTime };
            usernew = usernew.ComputePasswordHash();
            if (view_UserInfo == null || view_UserInfo.Pwd != usernew.Pwd || view_UserInfo.IsValid == 1)
            {
                return null;
            }
            else
            {
                Logs.WriteLog("view_UserInfo" + view_UserInfo);
                return view_UserInfo;
            }

        }
        return null;
    }

    public static UserInfo CurrentUserAsync(HttpContext context)
    {
        //未使用 不可用
        UserInfo userInfo = context.Session[CookieName_User] as UserInfo;
        if (userInfo != null)
        {
            return userInfo;
        }
        if (context.Request.Cookies[CookieName_User] != null && context.Request.Cookies[CookieName_Token] != null)
        {
            RSA rSA = HttpContext.Current.Session["ras"] as RSA;
            string keyword = context.Request.Cookies[CookieName_User].Value;
            string pwd = (string.IsNullOrEmpty(rSA.DecodeOrNull(context.Request.Cookies[CookieName_Token].Value)) ? "" : rSA.DecodeOrNull(context.Request.Cookies[CookieName_Token].Value));
            var user = SqlSugarBase.Db.Queryable<UserInfo>().First(x => x.Uid == keyword.Trim());
            UserInfo usernew = user.Clones();
            usernew.Pwd = pwd;
            usernew = usernew.ComputePasswordHash();
            return user;
        }
        return null;
    }

    public static View_UserInfo GetUserLoginBy(string keyword, string password, int tYPE = 0)
    {
        string pwd = password;
        if (tYPE == 0) { 
            RSA rSA = HttpContext.Current.Session["ras"] as RSA;
        if (rSA == null)
        {
            throw new CustomException("秘钥过期，请刷新界面!");
        }
        UserLogout();
        if (string.IsNullOrEmpty(rSA.DecodeOrNull(password)))
        {
            throw new CustomException("秘钥过期，请刷新界面!");
        }
         pwd = rSA.DecodeOrNull(password);
        }
        keyword = keyword.Trim().ToLower();
        View_UserInfo view_UserInfo = CacheHelp.cacheSysUserInfo.FirstOrDefault( a => a.Uid.Trim().ToLower() == keyword);
        if (view_UserInfo == null)
        {
            throw new CustomException("账号密码有误!");
        }
        UserInfo usernew = new UserInfo() { Uid = keyword.Trim(), Pwd = pwd, CreateTime = view_UserInfo == null ? DateTime.Now : view_UserInfo.CreateTime };
            usernew = usernew.ComputePasswordHash();

       string str  =  usernew.HashCode(view_UserInfo.Uid.ToUpper() + pwd +( view_UserInfo == null ? DateTime.Now : view_UserInfo.CreateTime).ToString("yyyy-MM-dd HH:mm:ss"));
        if (view_UserInfo == null || usernew.Pwd != view_UserInfo.Pwd)
            {
                throw new CustomException("账号密码有误!");
            }


            if (view_UserInfo.IsValid == 1)
                throw new CustomException("账号冻结!");
            else
            {
                if (view_UserInfo.IsValid < 2)
                    throw new CustomException("禁止访问!");
            }
            HttpContext.Current.Session[CookieName_User] = view_UserInfo;
            CookieExtensions.WriteCookie(CookieName_User, HttpUtility.UrlEncode(keyword, Encoding.GetEncoding("UTF-8")), 60);
            CookieExtensions.WriteCookie(CookieName_Token, HttpUtility.UrlEncode(password, Encoding.GetEncoding("UTF-8")), 60);
            return view_UserInfo;
    }

    public static void UserLogout()
    {
        if (CheckUserLogin())
        {
            string name = HttpContext.Current.User.Identity.Name;
            FormsAuthentication.SignOut();
            RemoveUser(name);
        }
    }
    public static void RemoveUser(string ID)
    {
        HttpContext.Current.Session.Clear();//删除所有Session
        //HttpContext.Current.Response.Cookies.Clear();//删除所有Cookies
        HttpCookie httpCookie = HttpContext.Current.Request.Cookies[CookieName_User];
        httpCookie.Expires = DateTime.Now.AddDays(-1.0);
        HttpContext.Current.Response.Cookies.Add(httpCookie);
        HttpCookie httpCookie2 = HttpContext.Current.Request.Cookies[CookieName_Token];
        httpCookie2.Expires = DateTime.Now.AddDays(-1.0);
        HttpContext.Current.Response.Cookies.Add(httpCookie2);
    }

    public static bool CheckUserLogin()
    {
        try
        {
            if (HttpContext.Current.Request.Cookies[CookieName_User] != null && HttpContext.Current.Request.Cookies[CookieName_Token] != null)
            {
                string keyword = HttpUtility.UrlDecode(HttpContext.Current.Request.Cookies[CookieName_User].Value);
                RSA rSA = HttpContext.Current.Session["ras"] as RSA ?? throw new CustomException("ras解析出错~");
                string pwd = (string.IsNullOrEmpty(rSA.DecodeOrNull(HttpUtility.UrlDecode(HttpContext.Current.Request.Cookies[CookieName_Token].Value))) ? "" : rSA.DecodeOrNull(HttpUtility.UrlDecode(HttpContext.Current.Request.Cookies[CookieName_Token].Value)));
                View_UserInfo view_UserInfo = CacheHelp.cacheSysUserInfo.Single((View_UserInfo a) => a.Uid == keyword);
                UserInfo usernew = new UserInfo() { Uid = keyword.Trim(), Pwd = pwd, CreateTime = view_UserInfo == null ? DateTime.Now : view_UserInfo.CreateTime };
                usernew = usernew.ComputePasswordHash();
                if (view_UserInfo == null || view_UserInfo.Pwd != usernew.Pwd)
                    return false;
                else
                    return true;
            }
            return false;
        }
        catch (Exception ex)
        {
            Logs.WriteLog("进入退出报错"+ ex.Message);
            return false;
        }
    }
}