using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using SqlSugar;

namespace IStation.DAL
{
    /// <summary>
    /// 数据库访问基类
    /// </summary>
    /// <typeparam name="T">实体类类型</typeparam>
    public partial class BaseDAL<T> where T :  Entity.BaseEntity, new()
    {

        /// <summary>
        /// 连接配置
        /// </summary>
        public virtual ConnectionConfig ConnectionConfig
        {
            get
            {
                return default;
            }
        } 

        #region Insert

        /// <summary>
        /// 插入指定对象到数据库中
        /// </summary>
        public virtual long Insert(T entity) 
        {
            if (entity == null)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
               return db.Insertable(entity).ExecuteReturnSnowflakeId();
            }
        }

        /// <summary>
        /// 插入指定对象集合到数据库中
        /// </summary>
        public virtual bool Inserts(List<T> list)
        {
            if (list == null || list.Count < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Insertable(list).ExecuteReturnSnowflakeIdList().Count()>0;
            }
        }

        /// <summary>
        /// 插入并返回
        /// </summary>
        public virtual List<long> InsertsR(List<T> list)
        {
            if (list == null || list.Count < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Insertable(list).ExecuteReturnSnowflakeIdList();
            }
        }

        /// <summary>
        /// 大批量插入
        /// </summary>
        public virtual bool BulkInserts(List<T> list)
        {
            if (list == null || list.Count < 1)
                return default;
            list.ForEach(x=>x.ID=SnowFlakeSingle.instance.NextId());
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
              return  db.Fastest<T>().BulkCopy(list)>0;
            }
        }

        #endregion

        #region Update

        /// <summary>
        /// 更新对象属性到数据库中
        /// </summary>
        public virtual bool Update(T entity)
        {
            if (entity == null)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Updateable(entity).ExecuteCommand()>0;
            }
        }

        /// <summary>
        /// 更新部分
        /// </summary>
        public virtual bool UpdatePart(T entity, List<string> pros)
        {
            if (entity == null)
                return default;
            if (pros == null || pros.Count < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Updateable(entity).UpdateColumns(pros.ToArray()).ExecuteCommand()>0;
            }
        }

        /// <summary>
        /// 更新指定对象集合到数据库中
        /// </summary>
        public virtual bool Updates(List<T> list)
        {
            if (list == null || list.Count < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Updateable(list).ExecuteCommand() > 0;
            }
        }

        /// <summary>
        /// 批量更新部分
        /// </summary>
        public virtual bool UpdatesPart(List<T> list, List<string> pros)
        {
            if (list == null || list.Count() < 1)
                return default;
            if (pros == null || pros.Count < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Updateable(list).UpdateColumns(pros.ToArray()).ExecuteCommand() > 0;
            }
        }

        /// <summary>
        /// 大批量更新
        /// </summary>
        public virtual bool BulkUpdates(List<T> list)
        {
            if (list == null || list.Count < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Fastest<T>().BulkUpdate(list) > 0;
            }
        }

        #endregion

        #region Delete

        /// <summary>
        /// 从数据库中删除指定对象
        /// </summary>
        public virtual bool Delete(T entity)
        {
            if (entity == null)
                return default;
            if (entity.ID < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Deleteable<T>().Where(entity).ExecuteCommand() > 0;   
            }
        }

        /// <summary>
        /// 从数据库中删除指定对象集合
        /// </summary>
        public virtual bool Deletes(List<T> list)
        {
            if (list == null || list.Count < 1)
                return default;
            if (list.Exists(x => x.ID < 1))
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Deleteable<T>().Where(list).ExecuteCommand() > 0;
            }
        }

        /// <summary>
        /// 根据指定对象的ID,从数据库中删除指定对象
        /// </summary>
        public virtual bool DeleteByID(long ID)
        {
            if (ID < 1)
                return default;

            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Deleteable<T>().Where(x=>x.ID==ID).ExecuteCommand() > 0;
            }
        }

        /// <summary>
        /// 通过id列表删除
        /// </summary>
        public virtual bool DeleteByIds(List<long> ids)
        {
            if (ids == null || ids.Count < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Deleteable<T>().Where(x => ids.Contains(x.ID)).ExecuteCommand() > 0;
            }
        }

        /// <summary>
        /// 从数据库中删除所有对象
        /// </summary>
        public virtual bool DeleteAll()
        {
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.DbMaintenance.TruncateTable<T>();
            }
        }

        #endregion

        #region Query

        /// <summary>
        /// 返回数据库所有的对象集合
        /// </summary>
        public virtual List<T> GetAll()
        {
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Queryable<T>().ToList();
            }
        }

        /// <summary>
        /// 查询数据库,返回指定ID的对象
        /// </summary>
        public virtual T GetByID(long id)
        {
            if (id < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Queryable<T>().First(x => x.ID == id);
            }
        }

        /// <summary>
        /// 通拓id列表获取
        /// </summary>
        /// <returns></returns>
        public virtual List<T> GetByIds(List<long> ids)
        {
            if (ids == null || ids.Count < 1)
                return default;
            using (SqlSugarClient db = new SqlSugarClient(ConnectionConfig))
            {
                return db.Queryable<T>().OrderBy(x=>x.ID).Where(x =>ids.Contains(x.ID)).ToList();
            }
        }

        #endregion




    }
}