using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.Script.Serialization;
using System.Xml.Serialization;
using NewLife;
using NewLife.Data;
using NewLife.Log;
using NewLife.Model;
using NewLife.Reflection;
using NewLife.Security;
using NewLife.Threading;
using NewLife.Web;
using XCode;
using XCode.Cache;
using XCode.Configuration;
using XCode.DataAccessLayer;
using XCode.Membership;
using XCode.Shards;

namespace Stardust.Data.Platform;

public partial class McpToken : Entity<McpToken>
{
    #region 对象操作
    // 控制最大缓存数量，Find/FindAll查询方法在表行数小于该值时走实体缓存
    private static Int32 MaxCacheCount = 1000;

    static McpToken()
    {
        // 累加字段，生成 Update xx Set Count=Count+1234 Where xxx
        //var df = Meta.Factory.AdditionalFields;
        //df.Add(nameof(CallCount));

        // 拦截器 UserInterceptor、TimeInterceptor、IPInterceptor
        Meta.Interceptors.Add(new UserInterceptor { AllowEmpty = false });
        Meta.Interceptors.Add<TimeInterceptor>();
        Meta.Interceptors.Add(new IPInterceptor { AllowEmpty = false });
        Meta.Interceptors.Add<TraceInterceptor>();

        // 实体缓存
        // var ec = Meta.Cache;
        // ec.Expire = 60;
    }

    /// <summary>验证并修补数据，返回验证结果，或者通过抛出异常的方式提示验证失败。</summary>
    /// <param name="method">添删改方法</param>
    public override Boolean Valid(DataMethod method)
    {
        //if (method == DataMethod.Delete) return true;
        // 如果没有脏数据，则不需要进行任何处理
        if (!HasDirty) return true;

        // 这里验证参数范围，建议抛出参数异常，指定参数名，前端用户界面可以捕获参数异常并聚焦到对应的参数输入框
        if (Name.IsNullOrEmpty()) throw new ArgumentNullException(nameof(Name), L.T("Name cannot be empty."));
        if (Token.IsNullOrEmpty()) throw new ArgumentNullException(nameof(Token), L.T("Token string cannot be empty."));

        // 建议先调用基类方法，基类方法会做一些统一处理
        if (!base.Valid(method)) return false;

        // 在新插入数据或者修改了指定字段时进行修正

        // 处理当前已登录用户信息，可以由UserInterceptor拦截器代劳
        /*var user = ManageProvider.User;
        if (user != null)
        {
            if (method == DataMethod.Insert && !Dirtys[nameof(CreateUserId)]) CreateUserId = user.ID;
            if (!Dirtys[nameof(UpdateUserId)]) UpdateUserId = user.ID;
        }*/
        //if (method == DataMethod.Insert && !Dirtys[nameof(CreateTime)]) CreateTime = DateTime.Now;
        //if (!Dirtys[nameof(UpdateTime)]) UpdateTime = DateTime.Now;
        //if (method == DataMethod.Insert && !Dirtys[nameof(CreateIP)]) CreateIP = ManageProvider.UserHost;
        //if (!Dirtys[nameof(UpdateIP)]) UpdateIP = ManageProvider.UserHost;

        // 检查唯一索引
        // CheckExist(method == DataMethod.Insert, nameof(Token));

        return true;
    }

    ///// <summary>首次连接数据库时初始化数据，仅用于实体类重载，用户不应该调用该方法</summary>
    //[EditorBrowsable(EditorBrowsableState.Never)]
    //protected override void InitData()
    //{
    //    // InitData一般用于当数据表没有数据时添加一些默认数据，该实体类的任何第一次数据库操作都会触发该方法，默认异步调用
    //    if (Meta.Session.Count > 0) return;

    //    if (XTrace.Debug) XTrace.WriteLine("开始初始化McpToken[MCP令牌]数据……");

    //    var entity = new McpToken();
    //    entity.Name = "abc";
    //    entity.Token = "abc";
    //    entity.Enable = true;
    //    entity.ExpireTime = DateTime.Now;
    //    entity.LastTime = DateTime.Now;
    //    entity.LastIP = "abc";
    //    entity.CallCount = 0;
    //    entity.Insert();

    //    if (XTrace.Debug) XTrace.WriteLine("完成初始化McpToken[MCP令牌]数据！");
    //}

    ///// <summary>已重载。基类先调用Valid(true)验证数据，然后在事务保护内调用OnInsert</summary>
    ///// <returns></returns>
    //public override Int32 Insert()
    //{
    //    return base.Insert();
    //}

    ///// <summary>已重载。在事务保护范围内处理业务，位于Valid之后</summary>
    ///// <returns></returns>
    //protected override Int32 OnDelete()
    //{
    //    return base.OnDelete();
    //}
    #endregion

    #region 扩展属性
    #endregion

    #region 高级查询

    // Select Count(Id) as Id,Category From McpToken Where CreateTime>'2020-01-24 00:00:00' Group By Category Order By Id Desc limit 20
    //static readonly FieldCache<McpToken> _CategoryCache = new(nameof(Category))
    //{
    //Where = _.CreateTime > DateTime.Today.AddDays(-30) & Expression.Empty
    //};

    ///// <summary>获取类别列表，字段缓存10分钟，分组统计数据最多的前20种，用于魔方前台下拉选择</summary>
    ///// <returns></returns>
    //public static IDictionary<String, String> GetCategoryList() => _CategoryCache.FindAllName();
    #endregion

    #region 业务操作

    /// <summary>生成Token字符串。sdmcp_前缀+32位Base62随机字符</summary>
    public static String GenerateToken() => "sdmcp_" + Rand.NextString(32, true);

    /// <summary>重置Token字符串</summary>
    public void Reset()
    {
        Token = GenerateToken();
        Update();
    }

    /// <summary>校验Token是否有效（启用且未过期）</summary>
    public Boolean IsValid()
    {
        if (!Enable) return false;
        if (ExpireTime > DateTime.MinValue && ExpireTime < DateTime.Now) return false;
        return true;
    }

    /// <summary>记录调用（更新调用统计）</summary>
    public void RecordCall(String ip)
    {
        CallCount++;
        LastTime = DateTime.Now;
        LastIP = ip;
        Update();
    }

    /// <summary>恒定时间比较Token字符串，防止时序攻击</summary>
    public static Boolean SafeEquals(String a, String b)
    {
        if (a == null || b == null || a.Length != b.Length) return false;
        var result = 0;
        for (var i = 0; i < a.Length; i++) result |= (Byte)a[i] ^ (Byte)b[i];
        return result == 0;
    }
    #endregion
}