using System;
using System.Collections.Generic;
using System.Text;
using Model;
using IDDal;
/************菜肴的業(yè)務(wù)邏輯層***********
 * 關(guān)于菜肴的增加,刪除,修改,查詢
 * 類設(shè)計(jì)者:魏瑩
 * 設(shè)計(jì)時(shí)間5月30日
 ***************************************/
namespace Business
{
    /// <summary>
    /// 菜肴操作的業(yè)務(wù)邏輯層
    /// </summary>
    public class BItem
    {
        ItemDal<Item> itemop = new ImpDDal.ImpItemDal();
        /// <summary>
        /// 增加一個(gè)菜肴
        /// </summary>
        /// <param name="item">菜肴對(duì)象</param>
        /// <returns>1成功增加,0增加失敗</returns>
        public int AddItem(Item item)
        {
            try
            {
                
                return itemop.AddItem(item);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 修改一個(gè)菜肴信息
        /// </summary>
        /// <param name="item">菜肴對(duì)象</param>
        /// <returns>1成功修改,0修改失敗</returns>
        public int ModifyItem(Item item)
        {
            try
            {   
                return itemop.EditItem(item);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }
        /// <summary>
        /// 修改一個(gè)菜肴的分類信息
        /// </summary>
        /// <param name="item">菜肴對(duì)象</param>
        /// <returns>1成功修改,0修改失敗</returns>
        public int ModifyItemType(Item item)
        {
            try
            {
                return itemop.EditItemType(item);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }
        /// <summary>
        /// 刪除一個(gè)菜肴
        /// </summary>
        /// <param name="item">菜肴對(duì)象</param>
        /// <returns>1成功刪除,0刪除失敗</returns>
        public int DeleteItem(Item item)
        {
            try
            {
                return itemop.DeleteItem(item);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 根據(jù)菜肴類別查詢菜肴
        /// </summary>
        /// <param name="type">類別編號(hào)</param>
        /// <returns>菜肴集合</returns>
        public IList<Item> Select(int type)
        {
            try
            {
                return itemop.SelectItem(type);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 根據(jù)菜肴名模糊查詢
        /// </summary>
        /// <param name="itemName">菜肴名稱</param>
        /// <returns>菜肴集合</returns>
        public IList<Item> Select(string itemName)
        {
            try
            {
                return itemop.SelectItem(itemName);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 查詢新加入的菜肴,提供主頁(yè)瀏覽
        /// </summary>
        /// <returns>菜肴集合</returns>
        public IList<Item> SelectNewItem()
        {
            try
            {
                return itemop.SelectNewItemByIndex();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 查詢某種菜肴的前幾條記錄
        /// </summary>
        /// <param name="type">菜肴類型</param>
        /// <param name="top">前幾條記錄</param>
        /// <returns>菜肴集合</returns>
        public IList<Item> SelectSubItem(int type,int top)
        {
            try
            {
                return itemop.SelectItem(type,top);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 根據(jù)菜肴編號(hào)返回一個(gè)菜肴信息
        /// </summary>
        /// <param name="systemId">菜肴編號(hào)</param>
        /// <returns>菜肴對(duì)象</returns>
        public Item SelectOneItem(long systemId)
        {
            try
            {
                return itemop.SelectOneItem(systemId);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 隨機(jī)讀取前TOP個(gè)菜肴
        /// </summary>
        /// <param name="top">前幾個(gè)</param>
        /// <returns>菜肴集合</returns>
        public IList<Item> SelectRandom(int top)
        {
            try
            {
                return itemop.SelectItemTop(top);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public IList<Item> SelectHotItems()
        {
            try
            {
                return itemop.SelectHotItems();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
        }

    }
}