using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PMS.Plugins.Common
{
    public static class HashtableHelper
    {

        private static Hashtable ht = Hashtable.Synchronized(new Hashtable());
        private static object obj = new object();

        /// <summary>
        /// 添加一个缓存项
        /// </summary>
        /// <param name="key">关键字 Key</param>
        /// <param name="data">数据值</param>
        public static void AddCacheIitems(string key, object data)
        {
            try
            {
                if (key != "")
                {
                    lock (ht.SyncRoot)  //zxm20140212添加
                    {
                        if (ht[key] != null)
                            ht.Remove(key);
                        ht.Add(key, data);
                    }
                }
            }
            catch (Exception)
            {

            }
        }
        /// <summary>
        /// 获取Hashtable键值
        /// </summary>
        /// <param name="key">key</param>
        /// <returns></returns>
        public static object GetCacheIitems(string key)
        {
            if (key != "")
            {
                lock (ht.SyncRoot)
                {
                    return ht[key];
                }
            }
            else
            {
                return null;
            }
        }
        /// <summary>
        /// 移除Hashtable键值
        /// </summary>
        /// <param name="key">key</param>
        public static void RemoveCacheItems(string key)
        {
            if (key != "")
            {
                lock (ht.SyncRoot)
                {
                    ht.Remove(key);
                }
            }
        }


        /// <summary>
        /// 移除所有缓存值
        /// </summary>
        public static void RemoveAllCacheItems()
        {
            lock (ht.SyncRoot)
            {
                ht.Clear();
            }
        }

        public static string GetHashtableCount(string key)
        {
            string r = "【insureSys:" + ht[key];
            return r + "|Hashtable键值总和：" + ht.Count + "】";
        }

        /// <summary>
        /// 批量移除缓存
        /// </summary>
        /// <param name="key"></param>
        public static void BatchRemoveCacheItems(string key)
        {
            lock (ht.SyncRoot)
            {
                foreach (DictionaryEntry h in ht)
                {
                    string keyName = h.Key.ToStringEx();
                    if (keyName.Contains(key))
                    {
                        ht.Remove(keyName);
                    }
                }
            }
        }

        /// <summary>
        /// 将DataTable 转换hashTable
        /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static Hashtable DataTableToHashTable(DataTable dt)
        {
            DataRow row = dt.Rows[0];
            Hashtable hash = new Hashtable();
            for (int i = 0; i < row.Table.Columns.Count; i++)
            {
                if (row[row.Table.Columns[i].ColumnName].ToStringEx() != "")
                    hash.Add(row.Table.Columns[i].ColumnName, row[row.Table.Columns[i].ColumnName].ToStringEx());
            }
            return hash;
        }
        /// <summary>
        /// 获取一个6位验证码随机数
        /// </summary>
        /// <returns></returns>
        private static int NewRandom()
        {
            lock (obj)
            {
                Random r = new Random(System.Environment.TickCount);
                int i = r.Next(100000, 999999);
                return i;
            }
        }
        /// <summary>
        /// 新生成一个Key
        /// </summary>
        /// <returns></returns>
        public static string NewKey()
        {
            string guid = NewRandom().ToStringEx();//Guid.NewGuid().ToString().ToUpper();
            return guid;
        }
    }
}