package dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Vector;

import entity.Product;

/**
 * 商品数据库操作类
 * @author xujinnan
 *
 */
public class ProductDao {
	private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

	/**
	 * 查找所有商品（默认排序）
	 * @return
	 */
	public Vector<Product> findAllProduct(){
		Vector<Product> ret = new Vector<Product>();
		
		Connection conn = DataBaseUtil.getConnection();
		try {
			PreparedStatement pstmt = conn.prepareStatement("select * from product");
			ResultSet rs = pstmt.executeQuery();
			while(rs.next()){
				Product p = new Product();
				p.setCatogery(rs.getInt("catogery"));
				p.setName(rs.getString("name"));
				p.setPrice(rs.getDouble("price"));
				p.setProductId(rs.getInt("product_id"));
				p.setProductNo(rs.getString("product_no"));
				p.setPurPrice(rs.getDouble("pur_price"));
				p.setStockDate(sdf.parse(rs.getString("stock_date")));
				p.setStorage(rs.getInt("storage"));
				p.setAlarmStorage(rs.getInt("alarm_storage"));
				ret.add(p);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return ret;
	}
	
	/**
	 * 根据分类查找商品
	 * @param cid
	 * @return
	 */
	public Vector<Product> findProductByCategory(int cid){
		Vector<Product> ret = new Vector<Product>();
		
		Connection conn = DataBaseUtil.getConnection();
		try {
			PreparedStatement pstmt = conn.prepareStatement("select * from product where catogery=?");
			pstmt.setInt(1, cid);
			ResultSet rs = pstmt.executeQuery();
			while(rs.next()){
				Product p = new Product();
				p.setCatogery(rs.getInt("catogery"));
				p.setName(rs.getString("name"));
				p.setPrice(rs.getDouble("price"));
				p.setProductId(rs.getInt("product_id"));
				p.setProductNo(rs.getString("product_no"));
				p.setPurPrice(rs.getDouble("pur_price"));
				p.setStockDate(sdf.parse(rs.getString("stock_date")));
				p.setStorage(rs.getInt("storage"));
				p.setAlarmStorage(rs.getInt("alarm_storage"));
				ret.add(p);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return ret;
	}
	
	/**
	 * 按分类排序查看
	 * @param cid
	 * @param order
	 * @return
	 */
	public Vector<Product> findProductByCategory(int cid, String order){
		Vector<Product> ret = new Vector<Product>();
		
		Connection conn = DataBaseUtil.getConnection();
		try {
			PreparedStatement pstmt = conn.prepareStatement("select * from product where catogery=? order by storage "+order);
			pstmt.setInt(1, cid);
			ResultSet rs = pstmt.executeQuery();
			while(rs.next()){
				Product p = new Product();
				p.setCatogery(rs.getInt("catogery"));
				p.setName(rs.getString("name"));
				p.setPrice(rs.getDouble("price"));
				p.setProductId(rs.getInt("product_id"));
				p.setProductNo(rs.getString("product_no"));
				p.setPurPrice(rs.getDouble("pur_price"));
				p.setStockDate(sdf.parse(rs.getString("stock_date")));
				p.setStorage(rs.getInt("storage"));
				p.setAlarmStorage(rs.getInt("alarm_storage"));
				ret.add(p);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return ret;
	}
	
	/**
	 * 根据商品编号查找商品
	 * @param no
	 * @return
	 */
	public Product findProductByNo(String no){
		Connection conn = DataBaseUtil.getConnection();
		try {
			PreparedStatement pstmt = conn.prepareStatement("select * from product where product_no=?");
			Product p = null;
			pstmt.setString(1, no);
			ResultSet rs = pstmt.executeQuery();
			while(rs.next()){
				p = new Product();
				p.setCatogery(rs.getInt("catogery"));
				p.setName(rs.getString("name"));
				p.setPrice(rs.getDouble("price"));
				p.setProductId(rs.getInt("product_id"));
				p.setProductNo(rs.getString("product_no"));
				p.setPurPrice(rs.getDouble("pur_price"));
				p.setStockDate(sdf.parse(rs.getString("stock_date")));
				p.setStorage(rs.getInt("storage"));
				p.setAlarmStorage(rs.getInt("alarm_storage"));
			}
			return p;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * 查找所有商品（指定排序）
	 * @param order
	 * @return
	 */
	public Vector<Product> findAllProduct(String order){
		Vector<Product> ret = new Vector<Product>();
		
		Connection conn = DataBaseUtil.getConnection();
		try {
			PreparedStatement pstmt = conn.prepareStatement("select * from product order by storage "+order);
			ResultSet rs = pstmt.executeQuery();
			while(rs.next()){
				Product p = new Product();
				p.setCatogery(rs.getInt("catogery"));
				p.setName(rs.getString("name"));
				p.setPrice(rs.getDouble("price"));
				p.setProductId(rs.getInt("product_id"));
				p.setProductNo(rs.getString("product_no"));
				p.setPurPrice(rs.getDouble("pur_price"));
				p.setStockDate(sdf.parse(rs.getString("stock_date")));
				p.setStorage(rs.getInt("storage"));
				p.setAlarmStorage(rs.getInt("alarm_storage"));
				ret.add(p);
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return ret;
	}
	
	/**
	 * 新商品入库
	 * @param product
	 */
	public void saveProduct(Product product){
		Connection conn = DataBaseUtil.getConnection();
		String sql = "insert into product(product_no, name ,catogery,price, pur_price, stock_date, storage, alarm_storage) values(?,?,?,?,?,?,?,?)";
		try {
			PreparedStatement pstmt = conn.prepareStatement(sql);
			pstmt.setString(1, product.getProductNo());
			pstmt.setString(2, product.getName());
			pstmt.setInt(3, product.getCatogery());
			pstmt.setDouble(4, product.getPrice());
			pstmt.setDouble(5, product.getPurPrice());
			pstmt.setString(6, sdf.format(new Date()));
			pstmt.setInt(7, product.getStorage());
			pstmt.setInt(8, product.getAlarmStorage());
			pstmt.executeUpdate();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * 按ID查找商品
	 * @param pid
	 * @return
	 */
	public Product findProduct(int pid){
		Connection conn = DataBaseUtil.getConnection();
		try {
			PreparedStatement pstmt = conn.prepareStatement("select * from product where product_id=?");
			pstmt.setInt(1, pid);
			ResultSet rs = pstmt.executeQuery();
			Product p = new Product();
			while(rs.next()){
				p.setCatogery(rs.getInt("catogery"));
				p.setName(rs.getString("name"));
				p.setPrice(rs.getDouble("price"));
				p.setProductId(rs.getInt("product_id"));
				p.setProductNo(rs.getString("product_no"));
				p.setPurPrice(rs.getDouble("pur_price"));
				p.setStockDate(sdf.parse(rs.getString("stock_date")));
				p.setStorage(rs.getInt("storage"));
				p.setAlarmStorage(rs.getInt("alarm_storage"));
			}
			return p;
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return null;
	}
	
	/**
	 * 删除产品信息
	 * @param pid
	 */
	public void deleteProduct(int pid){
		Connection conn = DataBaseUtil.getConnection();
		try {
			PreparedStatement pstmt = conn.prepareStatement("delete from product where product_id=?");
			pstmt.setInt(1, pid);
			pstmt.executeUpdate();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * 更新库存
	 * @param productId
	 * @param storage
	 */
	public void updateStorage(int productId, int storage){
		Product p = this.findProduct(productId);
		int ns = p.getStorage() + storage;
		Connection conn = DataBaseUtil.getConnection();
		String sql = "update product set storage=? where product_id=?";
		try {
			PreparedStatement pstmt = conn.prepareStatement(sql);
			pstmt.setInt(1, ns);
			pstmt.setInt(2, productId);
			pstmt.executeUpdate();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * 更新商品
	 * @param product
	 */
	public void updateProduct(Product product){
		Connection conn = DataBaseUtil.getConnection();
		String sql = "update product set product_no=?, name=? ,catogery=?, price=?, pur_price=?, stock_date=?, storage=?, alarm_storage=? where product_id=?";
		try {
			PreparedStatement pstmt = conn.prepareStatement(sql);
			pstmt.setString(1, product.getProductNo());
			pstmt.setString(2, product.getName());
			pstmt.setInt(3, product.getCatogery());
			pstmt.setDouble(4, product.getPrice());
			pstmt.setDouble(5, product.getPurPrice());
			pstmt.setString(6, sdf.format(new Date()));
			pstmt.setInt(7, product.getStorage());
			pstmt.setInt(8, product.getAlarmStorage());
			pstmt.setInt(9, product.getProductId());
			pstmt.executeUpdate();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
}