using System;
using System.Collections.Generic;
using System.Reflection;
using NewLife.Data;
using XCode;
using XCode.Membership;

namespace NewLife.Cube.Entity
{
    /// <summary>定时作业。定时执行任务</summary>
    public partial class CronJob : Entity<CronJob>
    {
        #region 对象操作
        static CronJob()
        {
            // 累加字段，生成 Update xx Set Count=Count+1234 Where xxx
            //var df = Meta.Factory.AdditionalFields;
            //df.Add(nameof(Kind));

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

            // 单对象缓存
            var sc = Meta.SingleCache;
            sc.FindSlaveKeyMethod = k => Find(_.Name == k);
            sc.GetSlaveKeyMethod = e => e.Name;
        }

        /// <summary>验证并修补数据，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;

            // 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), "名称不能为空！");

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

        #region 扩展属性
        #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 CronJob FindById(Int32 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>根据名称查找</summary>
        /// <param name="name">名称</param>
        /// <returns>实体对象</returns>
        public static CronJob FindByName(String name)
        {
            // 实体缓存
            if (Meta.Session.Count < 1000) return Meta.Cache.Find(e => e.Name.EqualIgnoreCase(name));

            // 单对象缓存
            //return Meta.SingleCache.GetItemWithSlaveKey(name) as CronJob;

            return Find(_.Name == name);
        }
        #endregion

        #region 高级查询
        /// <summary>高级查询</summary>
        /// <param name="name">名称</param>
        /// <param name="start">更新时间开始</param>
        /// <param name="end">更新时间结束</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<CronJob> Search(String name, DateTime start, DateTime end, String key, PageParameter page)
        {
            var exp = new WhereExpression();

            if (!name.IsNullOrEmpty()) exp &= _.Name == name;
            exp &= _.UpdateTime.Between(start, end);
            if (!key.IsNullOrEmpty()) exp &= _.DisplayName.Contains(key) | _.Method.Contains(key) | _.Argument.Contains(key) | _.Remark.Contains(key) | _.CreateIP.Contains(key) | _.UpdateIP.Contains(key);

            return FindAll(exp, page);
        }
        #endregion

        #region 业务操作
        /// <summary>添加定时作业</summary>
        /// <param name="name"></param>
        /// <param name="method"></param>
        /// <param name="cron"></param>
        /// <param name="enable"></param>
        /// <returns></returns>
        public static CronJob Add(String name, MethodInfo method, String cron, Boolean enable = true)
        {
            if (method == null || !method.IsStatic) throw new ArgumentOutOfRangeException(nameof(method), "定时作业执行方法必须是带有单个String参数的静态方法。");

            if (name.IsNullOrEmpty()) name = method.Name;
            var job = FindByName(name);
            if (job != null) return job;

            job = new CronJob
            {
                Name = name,
                DisplayName = method.GetDisplayName(),
                Method = $"{method.DeclaringType.FullName}.{method.Name}",
                Cron = cron,
                Enable = enable,
                Remark = method.GetDescription(),
            };

            job.Insert();

            return job;
        }

        /// <summary>添加定时作业</summary>
        /// <param name="name"></param>
        /// <param name="action"></param>
        /// <param name="cron"></param>
        /// <param name="enable"></param>
        /// <returns></returns>
        public static CronJob Add(String name, Action<String> action, String cron, Boolean enable = true) => Add(name, action.Method, cron, enable);

        ///// <summary>添加定时作业</summary>
        ///// <param name="name"></param>
        ///// <param name="action"></param>
        ///// <param name="cron"></param>
        ///// <param name="enable"></param>
        ///// <returns></returns>
        //public static CronJob Add(String name, Action<CronJob> action, String cron, Boolean enable = true) => Add(name, action.Method, cron, enable);
        #endregion
    }
}