/**
 * 
 */
package com.air.backend.util;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.air.exceptions.AirException;
import com.air.model.LoginUser;
import com.air.persistence.DataSrcUtil;
import com.air.persistence.IsqlDataSource;
import com.air.util.ValHelper;

/**
 * @author jelly_yang
 *
 */
public final class AuthUtil {
	
	private static Log log = LogFactory.getLog(AuthUtil.class);

	private AuthUtil(){
		
	}
	
	private static class AuthUtilHolder{
		static final AuthUtil authUtil = new AuthUtil();
	}
	
	public static AuthUtil getInstance(){
		return AuthUtilHolder.authUtil;
	}
	
	public LoginUser login(String loginname,String pwd) throws AirException
	{
		LoginUser user = null;
		Map<String, String> result = new HashMap<String, String>();
		String sSql = "select username,pwd,name,sex,certification_type,certification_code,question,answer from users where username='"+loginname+"' and pwd='"+pwd+"'";
		   
		IsqlDataSource src = DataSrcUtil.getInstance().getDataSource();
		Connection conn = null;
		try
		{
			conn = src.getConnection();
			result = src.retrieveSingleRow(conn, sSql);
		}
		catch(SQLException se)
		{
			se.printStackTrace();
			log.error("login() caught SQLException: " + se);
		}
		catch(Exception ex)
		{
			ex.printStackTrace();
			log.error("login() caught Exception: " + ex);
		}
		finally
		{
			src.closeConn(conn);
		}
		if(!result.isEmpty())
		{
			String username = ValHelper.getInstance().getValue(result, "username");
			String password = ValHelper.getInstance().getValue(result, "pwd");
			String name = ValHelper.getInstance().getValue(result, "name");
			String sex = ValHelper.getInstance().getValue(result, "sex");
			String certificationType = ValHelper.getInstance().getValue(result, "certification_type");
			String certificationCode = ValHelper.getInstance().getValue(result, "certification_code");
			String question = ValHelper.getInstance().getValue(result, "question");
			String answer = ValHelper.getInstance().getValue(result, "answer");
			user = new LoginUser(username, password,name,sex,certificationType,certificationCode,question,answer);
		}
		return user;
	}

}