using Longbow.Caching;
using Longbow.Caching.Configuration;
using Longbow.ExceptionManagement;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Globalization;
using System.Linq;

namespace Bootstrap.DataAccess
{
    public class DictHelper
    {
        private const string DictDataKey = "DictData-CodeDictHelper";

        /// <summary>
        /// 查询所有字典信息
        /// </summary>
        /// <param name="tId"></param>
        /// <returns></returns>
        public static IEnumerable<Dict> RetrieveDicts(string tId = null)
        {
            string sql = "select * from Dicts";
            var ret = CacheManager.GetOrAdd(DictDataKey, CacheSection.RetrieveIntervalByKey(DictDataKey), key =>
            {
                List<Dict> Dicts = new List<Dict>();
                DbCommand cmd = DBAccessManager.SqlDBAccess.CreateCommand(CommandType.Text, sql);
                try
                {
                    using (DbDataReader reader = DBAccessManager.SqlDBAccess.ExecuteReader(cmd))
                    {
                        while (reader.Read())
                        {
                            Dicts.Add(new Dict()
                            {
                                ID = (int)reader[0],
                                Category = (string)reader[1],
                                Name = (string)reader[2],
                                Code = (string)reader[3]
                            });
                        }
                    }
                }
                catch (Exception ex) { ExceptionManager.Publish(ex); }
                return Dicts;
            }, CacheSection.RetrieveDescByKey(DictDataKey));
            return string.IsNullOrEmpty(tId) ? ret : ret.Where(t => tId.Equals(t.ID.ToString(), StringComparison.OrdinalIgnoreCase));
        }

        /// <summary>
        /// 删除字典中的数据
        /// </summary>
        /// <param name="ids">需要删除的IDs</param>
        /// <returns></returns>
        public static bool DeleteDict(string ids)
        {
            var ret = false;
            if (string.IsNullOrEmpty(ids) || ids.Contains("'")) return ret;
            try
            {
                string sql = string.Format(CultureInfo.InvariantCulture, "Delete from Dicts where ID in ({0})", ids);
                using (DbCommand cmd = DBAccessManager.SqlDBAccess.CreateCommand(CommandType.Text, sql))
                {
                    DBAccessManager.SqlDBAccess.ExecuteNonQuery(cmd);
                    ClearCache();
                    ret = true;
                }
            }
            catch (Exception ex)
            {
                ExceptionManager.Publish(ex);
            }
            return ret;
        }

        /// <summary>
        /// 保存新建/更新的字典信息
        /// </summary>
        /// <param name="p"></param>
        /// <returns></returns>
        public static bool SaveDict(Dict p)
        {
            if (p == null) throw new ArgumentNullException("p");
            bool ret = false;
            if (p.Category.Length > 50) p.Category.Substring(0, 50);
            if (p.Name.Length > 50) p.Name.Substring(0, 50);
            if (p.Code.Length > 50) p.Code.Substring(0, 50);
            string sql = p.ID == 0 ?
                "Insert Into Dicts (Category, Name, Code) Values (@Category, @Name, @Code)" :
                "Update Dicts set Category = @Category, Name = @Name, @Code = Code where ID = @ID";
            try
            {
                using (DbCommand cmd = DBAccessManager.SqlDBAccess.CreateCommand(CommandType.Text, sql))
                {
                    cmd.Parameters.Add(DBAccessManager.SqlDBAccess.CreateParameter("@ID", p.ID, ParameterDirection.Input));
                    cmd.Parameters.Add(DBAccessManager.SqlDBAccess.CreateParameter("@Category", p.Category, ParameterDirection.Input));
                    cmd.Parameters.Add(DBAccessManager.SqlDBAccess.CreateParameter("@Name", p.Name, ParameterDirection.Input));
                    cmd.Parameters.Add(DBAccessManager.SqlDBAccess.CreateParameter("@Code", p.Code, ParameterDirection.Input));
                    DBAccessManager.SqlDBAccess.ExecuteNonQuery(cmd);
                }
                ret = true;
                ClearCache();
            }
            catch (DbException ex)
            {
                ExceptionManager.Publish(ex);
            }
            return ret;
        }

        /// <summary>
        /// 更新缓存
        /// </summary>
        private static void ClearCache()
        {
            CacheManager.Clear(key => key == DictDataKey);
        }
    }
}