using System;
using System.Collections.Generic;
using System.Text;
using HTB.DevFx.Core;
using System.Configuration;
using HTB.DevFx.Utils;
using HTB.DevFx.OnlineManagement;

namespace HTB.DevFx.Security
{
    /// <summary>
    /// 权限检测类
    /// </summary>
    public class PermissionHelper
    {

        /// <summary>
        /// 检测权限
        /// </summary>
        private bool CheckPermission()
        {
            //获取当前访问的页面文件目录下的权限配置文件
            Permission Pis = GetModulePermission();
            
            //如果未配置权限集合则直接返回true
            if (Pis == null)
                return true;

            //如果用户已经经过认证
            if (Authenticator.IsAuthenticated)
            {
                int UserID = Authenticator.UserID;

                //从缓存中检查当前用户是否为超级用户
                //如果是管理员则直接返回true
                OnlineUser<string> _curUserOnlineInfo = OnlineUserHelper.UserOnlineList.GetValue(UserID);
                if (_curUserOnlineInfo.U_Super_Flag)
                    return true;

                //检测页面文件名访问权限
                PermissionItem PsItem = GetPermissionItem(Pis.ItemList);
                if (PsItem == null)
                    return false;

                if (string.IsNullOrEmpty(WebHelper.GetScriptNameQueryString()))
                    return UserData.CheckPageCode(UserID, Pis.module_id, Pis.PageCode, PsItem.Item_Value);
                else
                {
                    if (!UserData.CheckPageCode(UserID, Pis.module_id, Pis.PageCode, PsItem.Item_Value))
                    {
                        return false;
                    }
                    else
                    {
                        //检测页面文件url权限
                        PsItem = GetUrlPermissionItem(Pis.ItemList);
                        if (PsItem == null)
                            return true;
                        return UserData.CheckPageCode(UserID, Pis.module_id, Pis.PageCode, PsItem.Item_Value);
                    }
                }
            }
            else
            {
                return true;
            }
        }

        /// <summary>
        /// 获取当前目录下权限配置集合
        /// </summary>
        public static Permission GetModulePermission()
        {
            return (Permission)ConfigurationManager.GetSection("Permission");
        }

        /// <summary>
        /// 获取当前面页所属的PermissionItem
        /// </summary>
        /// <param name="List">权限列表</param>
        /// <returns></returns>
        public static PermissionItem GetPermissionItem(List<PermissionItem> List)
        {
            PermissionItem PI = null;
            string curUrlFileName =WebHelper.GetScriptNameWithDot();
            foreach (PermissionItem var in List)
            {
                if (var.Item_FileList.IndexOf(WebHelper.GetScriptName().ToLower()) >= 0)
                {
                    return var;
                }
            }
            return PI;
        }


        /// <summary>
        /// 获取当前面页Url所属的PermissionItem
        /// </summary>
        /// <param name="List">权限</param>
        /// <returns>权限值</returns>
        public static PermissionItem GetUrlPermissionItem(List<PermissionItem> List)
        {
            PermissionItem PI = null;
            foreach (PermissionItem var in List)
            {
                if (var.Item_FileList.IndexOf("," + WebHelper.GetScriptNameUrl().ToLower() + ",") >= 0)
                {
                    return var;
                }
            }
            return PI;
        }

        /// <summary>
        /// 检测按钮权限
        /// </summary>
        /// <param name="PT"></param>
        /// <returns></returns>
        public static bool CheckButtonPermission(int PermissionId)
        {
            Permission Pis = GetModulePermission();
            if (Pis == null)
                return true;
            return UserData.CheckPageCode(Authenticator.UserID, Pis.ApplicationID, Pis.PageCode, PermissionId);

        }

        /// <summary>
        /// 检测权限，如果无操作权限则直接返回
        /// </summary>
        /// <param name="PT"></param>
        public static void CheckPermissionVoid(int PermissionId)
        {
            if (!CheckButtonPermission(PermissionId))
            {
                //发送无权限操作提示

            }
        }


    }
}