using System;
using System.Collections.Generic;
using System.Runtime.Serialization;
using System.Web.Script.Serialization;
using System.Xml.Serialization;
using NewLife;
using NewLife.Data;
using NewLife.Log;
using Stardust.Data.Nodes;
using XCode;
using XCode.Shards;

namespace Stardust.Data.Monitors;

/// <summary>跟踪数据。应用定时上报采样得到的埋点跟踪原始数据</summary>
public partial class TraceData : Entity<TraceData>
{
    #region 对象操作
    static TraceData()
    {
        // 配置自动分表策略，一般在实体类静态构造函数中配置
        Meta.ShardPolicy = new TimeShardPolicy(nameof(Id), Meta.Factory)
        {
            ConnPolicy = "{0}",
            TablePolicy = "{0}_{1:yyyyMMdd}",
            Step = TimeSpan.FromDays(1),
        };

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

        // 过滤器 UserModule、TimeModule、IPModule
        Meta.Modules.Add<TimeModule>();
    }

    /// <summary>验证数据，通过抛出异常的方式提示验证失败。</summary>
    /// <param name="isNew">是否插入</param>
    public override void Valid(Boolean isNew)
    {
        // 如果没有脏数据，则不需要进行任何处理
        if (!HasDirty) return;

        var len = _.Name.Length;
        if (Name.Length > len) Name = Name.Cut(len);

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

        //StatDate = StartTime.ToDateTime().ToLocalTime().Date;
        if (TotalCost < 0) TotalCost = 0;
        if (!Dirtys[nameof(Cost)])
        {
            // 为了让平均值逼近TP99，避免毛刺干扰，减去最大值再取平均
            if (Total >= 50)
                Cost = (Int32)Math.Round((Double)(TotalCost - MaxCost) / (Total - 1));
            else
                Cost = Total == 0 ? 0 : (Int32)Math.Round((Double)TotalCost / Total);
        }
    }
    #endregion

    #region 扩展属性
    /// <summary>应用</summary>
    [XmlIgnore, IgnoreDataMember]
    public AppTracer App => Extends.Get(nameof(App), k => AppTracer.FindByID(AppId));

    /// <summary>应用</summary>
    [Map(nameof(AppId))]
    public String AppName => App + "";

    /// <summary>节点</summary>
    [XmlIgnore, ScriptIgnore, IgnoreDataMember]
    public Node Node => Extends.Get(nameof(Node), k => Node.FindByID(NodeId));

    /// <summary>节点</summary>
    [Map(__.NodeId)]
    public String NodeName => Node?.Name;

    /// <summary>关联项</summary>
    [XmlIgnore, IgnoreDataMember]
    public TraceData Link => Extends.Get(nameof(TraceData), k => FindById(LinkId));

    /// <summary>开始时间</summary>
    [Map(nameof(StartTime))]
    public DateTime Start => StartTime.ToDateTime().ToLocalTime();

    /// <summary>结束时间</summary>
    [Map(nameof(EndTime))]
    public DateTime End => EndTime.ToDateTime().ToLocalTime();
    #endregion

    #region 扩展查询
    /// <summary>根据编号查找</summary>
    /// <param name="id">编号</param>
    /// <returns>实体对象</returns>
    public static TraceData FindById(Int64 id)
    {
        if (id <= 0) return null;

        //// 实体缓存
        //if (Meta.Session.Count < 1000) return Meta.Cache.Find(e => e.Id == id);

        // 单对象缓存
        return Meta.SingleCache[id];

        //return Find(_.Id == id);
    }

    ///// <summary>根据应用、操作名查找</summary>
    ///// <param name="appId">应用</param>
    ///// <param name="name">操作名</param>
    ///// <returns>实体列表</returns>
    //public static IList<TraceData> FindAllByAppIdAndName(Int32 appId, String name)
    //{
    //    //// 实体缓存
    //    //if (Meta.Session.Count < 1000) return Meta.Cache.FindAll(e => e.AppId == appId && e.Name == name);

    //    return FindAll(_.AppId == appId & _.Name == name);
    //}

    /// <summary>根据应用、实例查找</summary>
    /// <param name="appId">应用</param>
    /// <param name="clientId">实例</param>
    /// <returns>实体列表</returns>
    public static IList<TraceData> FindAllByAppIdAndClientId(Int32 appId, String clientId)
    {
        // 实体缓存
        if (Meta.Session.Count < 1000) return Meta.Cache.FindAll(e => e.AppId == appId && e.ClientId.EqualIgnoreCase(clientId));

        return FindAll(_.AppId == appId & _.ClientId == clientId);
    }

    /// <summary>根据统计小时、应用、跟踪项查找</summary>
    /// <param name="statHour">统计小时</param>
    /// <param name="appId">应用</param>
    /// <param name="itemId">跟踪项</param>
    /// <returns>实体列表</returns>
    public static IList<TraceData> FindAllByStatHourAndAppIdAndItemId(DateTime statHour, Int32 appId, Int32 itemId)
    {
        // 实体缓存
        if (Meta.Session.Count < 1000) return Meta.Cache.FindAll(e => e.StatHour == statHour && e.AppId == appId && e.ItemId == itemId);

        return FindAll(_.StatHour == statHour & _.AppId == appId & _.ItemId == itemId);
    }

    /// <summary>根据统计分钟、应用、跟踪项查找</summary>
    /// <param name="statMinute">统计分钟</param>
    /// <param name="appId">应用</param>
    /// <param name="itemId">跟踪项</param>
    /// <returns>实体列表</returns>
    public static IList<TraceData> FindAllByStatMinuteAndAppIdAndItemId(DateTime statMinute, Int32 appId, Int32 itemId)
    {
        // 实体缓存
        if (Meta.Session.Count < 1000) return Meta.Cache.FindAll(e => e.StatMinute == statMinute && e.AppId == appId && e.ItemId == itemId);

        return FindAll(_.StatMinute == statMinute & _.AppId == appId & _.ItemId == itemId);
    }

    /// <summary>根据应用、统计分钟查找</summary>
    /// <param name="appId">应用</param>
    /// <param name="statMinute">统计分钟</param>
    /// <returns>实体列表</returns>
    public static IList<TraceData> FindAllByAppIdAndStatMinute(Int32 appId, DateTime statMinute)
    {
        // 实体缓存
        if (Meta.Session.Count < 1000) return Meta.Cache.FindAll(e => e.AppId == appId && e.StatMinute == statMinute);

        return FindAll(_.AppId == appId & _.StatMinute == statMinute);
    }
    #endregion

    #region 高级查询
    /// <summary>高级查询</summary>
    /// <param name="appId">应用</param>
    /// <param name="itemId">跟踪项</param>
    /// <param name="clientId">客户端实例</param>
    /// <param name="name">操作名。接口名或埋点名</param>
    /// <param name="kind">时间种类。day/hour/minute</param>
    /// <param name="minError">最小错误数。指定后，只返回错误数大于等于该值的数据</param>
    /// <param name="start">创建时间开始</param>
    /// <param name="end">创建时间结束</param>
    /// <param name="key">关键字</param>
    /// <param name="page">分页参数信息。可携带统计和数据权限扩展查询等信息</param>
    /// <returns>实体列表</returns>
    public static IList<TraceData> Search(Int32 appId, Int32 itemId, String clientId, String name, String kind, Int32 minError, DateTime start, DateTime end, String key, PageParameter page)
    {
        var exp = new WhereExpression();

        if (appId >= 0) exp &= _.AppId == appId;
        if (itemId > 0) exp &= _.ItemId == itemId;
        if (!clientId.IsNullOrEmpty()) exp &= _.ClientId == clientId;
        if (!name.IsNullOrEmpty()) exp &= _.Name == name;
        if (!key.IsNullOrEmpty()) exp &= _.ClientId == key | _.Name == key;
        if (minError > 0) exp &= _.Errors >= minError;

        if (appId > 0 && start.Year > 2000)
        {
            var fi = kind switch
            {
                "day" => _.StatDate,
                "hour" => _.StatHour,
                "minute" => _.StatMinute,
                _ => _.StatDate,
            };

            if (start == end)
                exp &= fi == start;
            else
                exp &= fi.Between(start, end);
        }
        else
            exp &= _.Id.Between(start, end, Meta.Factory.Snow);

        using var split = Meta.CreateShard(start);

        return FindAll(exp, page);
    }

    /// <summary>根据时间类型搜索</summary>
    /// <param name="appId"></param>
    /// <param name="itemId"></param>
    /// <param name="kind"></param>
    /// <param name="time"></param>
    /// <param name="count"></param>
    /// <returns></returns>
    public static IList<TraceData> Search(Int32 appId, Int32 itemId, String kind, DateTime time, Int32 count)
    {
        var exp = new WhereExpression();

        if (appId >= 0) exp &= _.AppId == appId;
        if (itemId > 0) exp &= _.ItemId == itemId;

        var fi = kind switch
        {
            "day" => _.StatDate,
            "hour" => _.StatHour,
            "minute" => _.StatMinute,
            _ => _.StatDate,
        };
        exp &= fi == time;

        using var split = Meta.CreateShard(time);

        return FindAll(exp, new PageParameter { PageSize = count });
    }

    /// <summary>根据应用接口分组统计</summary>
    /// <param name="kind"></param>
    /// <param name="time"></param>
    /// <param name="appIds"></param>
    /// <returns></returns>
    public static IList<TraceData> SearchGroupAppAndName(String kind, DateTime time, Int32[] appIds)
    {
        var exp = new WhereExpression();
        var selects = _.Total.Sum() & _.Errors.Sum() & _.TotalCost.Sum() & _.MaxCost.Max() & _.MinCost.Min() & _.TotalValue.Sum() & _.AppId & _.Name;

        var fi = kind switch
        {
            "day" => _.StatDate,
            "hour" => _.StatHour,
            "minute" => _.StatMinute,
            _ => _.StatDate,
        };
        exp &= fi == time;

        if (appIds != null && appIds.Length > 0) exp &= _.AppId.In(appIds);

        return FindAll(exp.GroupBy(_.AppId, _.Name), null, selects);
    }

    /// <summary>查询指定应用根据操作名分组统计</summary>
    /// <param name="appId"></param>
    /// <param name="start"></param>
    /// <param name="end"></param>
    /// <returns></returns>
    public static IList<TraceData> SearchGroupAppAndName(Int32 appId, DateTime start, DateTime end)
    {
        var selects = _.Total.Sum() & _.Errors.Sum() & _.TotalCost.Sum() & _.MaxCost.Max() & _.MinCost.Min() & _.TotalValue.Sum() & _.AppId & _.Name & _.StatMinute;

        var exp = new WhereExpression();
        exp &= _.AppId == appId;
        exp &= _.StatMinute >= start & _.StatMinute <= end;

        using var split = Meta.CreateShard(start);

        return FindAll(exp.GroupBy(_.AppId, _.Name, _.StatMinute), null, selects);
    }

    /// <summary>根据应用分组统计</summary>
    /// <param name="date"></param>
    /// <param name="appIds"></param>
    /// <returns></returns>
    public static IList<TraceData> SearchGroupApp(DateTime date, Int32[] appIds)
    {
        var selects = _.Total.Sum() & _.Errors.Sum() & _.TotalCost.Sum() & _.MaxCost.Max() & _.MinCost.Min() & _.TotalValue.Sum() & _.AppId;
        var where = new WhereExpression() & _.StatDate == date;
        if (appIds != null && appIds.Length > 0) where &= _.AppId.In(appIds);

        return FindAll(where.GroupBy(_.AppId), null, selects);
    }

    /// <summary>修正当天数据</summary>
    /// <param name="date"></param>
    /// <returns></returns>
    public static Int32 FixStatDate(DateTime date)
    {
        return Update(_.StatDate == date, _.Id.Between(date, date, Meta.Factory.Snow));
    }
    #endregion

    #region 业务操作
    /// <summary>根据跟踪数据创建对象</summary>
    /// <param name="builder"></param>
    /// <returns></returns>
    public static TraceData Create(ISpanBuilder builder)
    {
        var time = builder.StartTime.ToDateTime().ToLocalTime();

        var td = new TraceData
        {
            Id = Meta.Factory.Snow.NewId(),
            StatDate = time.Date,
            StatHour = time.Date.AddHours(time.Hour),
            StatMinute = time.Date.AddHours(time.Hour).AddMinutes(time.Minute / 5 * 5),
            Name = builder.Name.Cut(_.Name.Length),
            StartTime = builder.StartTime,
            EndTime = builder.EndTime,

            Total = builder.Total,
            Errors = builder.Errors,
            TotalCost = builder.Cost,
            MaxCost = builder.MaxCost,
            MinCost = builder.MinCost,

            TotalValue = builder.Value,
        };

        if (builder.Samples != null) td.Samples = builder.Samples.Count;
        if (builder.ErrorSamples != null) td.ErrorSamples = builder.ErrorSamples.Count;

        // 清空异常耗时数据
        if (td.TotalCost < 0) td.TotalCost = 0;

        return td;
    }

    /// <summary>删除指定日期之前的数据</summary>
    /// <param name="date"></param>
    /// <returns></returns>
    public static Int32 DeleteBefore(DateTime date)
    {
        //Delete(_.Id < Meta.Factory.Snow.GetId(date));

        var snow = Meta.Factory.Snow;
        var whereExp = _.Id < snow.GetId(date);

        // 使用底层接口，加大执行时间
        var session = Meta.Session;
        using var cmd = session.Dal.Session.CreateCommand($"Delete From {session.FormatedTableName} Where {whereExp}");
        cmd.CommandTimeout = 5 * 60;
        return session.Dal.Session.Execute(cmd);
    }
    #endregion
}