using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EMIS.DataLogic.SystemDAL;

namespace EMIS.CommonLogic.SystemServices
{
    public class SerialNumberServices : BaseServices, ISerialNumberServices
    {
        public SerialNumberDAL SerialNumberDAL { get; set; }

        /// <summary>
        /// 获取下一个序列号带key（可指定序列号位数）
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public string GetSN(string key, int postfixLength = 2)
        {
            if (key == null)
            {
                throw new ArgumentNullException("key");
            }
            postfixLength = postfixLength < 0 ? 0 : postfixLength;
            var result = 1;
            var entity = SerialNumberDAL.SerialNumberRepository.GetSingle(w => w.ID == key);

            if (entity != null)
            {
                result = entity.Number + 1;
            }

            return key + result.ToString().PadLeft(postfixLength, '0');
        }

        /// <summary>
        /// 获取下一个序列号带key同时更新（可指定序列号位数）
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public string SetSN(string key, int postfixLength = 2)
        {
            if (key == null)
            {
                throw new ArgumentNullException("key");
            }

            postfixLength = postfixLength < 0 ? 0 : postfixLength;

            var result = 1;

            var entity = SerialNumberDAL.SerialNumberRepository.GetSingle(w => w.ID == key);

            if (entity != null)
            {
                result = entity.Number + 1;
            }
            else
            {
                entity = new Entities.Sys_SerialNumber();
                entity.ID = key;

                UnitOfWork.Add(entity);
            }

            entity.Number = result;
            entity.ResetTime = DateTime.Now;

            UnitOfWork.Commit();

            return key + result.ToString().PadLeft(postfixLength, '0');
        }

        /// <summary>
        /// 获取下一位序列号不带key
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public int GetSNValue(string key)
        {
            if (key == null)
            {
                throw new ArgumentNullException("key");
            }
            var result = 1;
            var entity = SerialNumberDAL.SerialNumberRepository.GetSingle(w => w.ID == key);

            if (entity != null)
            {
                result = entity.Number + 1;
            }

            return result;
        }

        /// <summary>
        /// 设置下一个序列号，同时更新（带skip）
        /// </summary>
        /// <param name="key"></param>
        /// <param name="skipCount"></param>
        public void SkipSN(string key, int skipCount)
        {
            if (key == null)
            {
                throw new ArgumentNullException("key");
            }

            var entity = SerialNumberDAL.SerialNumberRepository.GetSingle(w => w.ID == key);

            var result = 1;
            if (entity != null)
            {
                result = entity.Number;
            }
            else
            {
                entity = new Entities.Sys_SerialNumber();
                entity.ID = key;

                UnitOfWork.Add(entity);
            }

            entity.Number = result + skipCount;
            entity.ResetTime = DateTime.Now;

            UnitOfWork.Commit();
        }

    }
}