package com.jungmin;


import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
public class DBconnection {

	String id=null;
	String passwd=null;
	String name=null;
	
	
	private static final String URL="jdbc:oracle:thin@168.126.146.45:1521:orcl";
	private static final String DBID="20172296";
	private static final String DBPASSWD="980710";
	private static final String DRIVER="oracle.jdbc.driver.OracleDriver";
	
	
	private Connection con=null;
	private PreparedStatement pstmt=null;
	private ResultSet re=null;

	
	public void DBConnection(){
		try {
			Class.forName(DRIVER);
		}catch(Exception e) {
			e.printStackTrace();
		}
	}
	
	public void connect() {
		try {
			con=DriverManager.getConnection(URL,DBID,DBPASSWD);
		}catch(Exception e) {
			e.printStackTrace();
		}
	}
	
	public void disconnect() {
		if(pstmt !=null) {
			try{
				pstmt.close();
			}catch(Exception e) {
				e.printStackTrace();
			}
		}
		if(con !=null) {
			try {
				con.close();
			}catch(Exception e) {
				e.printStackTrace();	
			}
		}
	}
	
	public ArrayList<MemberEntity> getMemberList(){
		
		connect();
		ArrayList<MemberEntity> list=new ArrayList<MemberEntity>();
		
		String sql="select * from member";
		try {
			pstmt=con.prepareStatement(sql);
			re=pstmt.executeQuery();
			
			while(re.next()) {
				MemberEntity mem=new MemberEntity();
				
				mem.setId(re.getString("id"));
				mem.setPasswd(re.getString("passwd"));
				mem.setName(re.getString("name"));
				
				list.add(mem);
			}
			re.close();
		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			disconnect();
		}
		return list;
		}

/*°ú¸ñ¸®½ºÆ® °ü·Ã DBºÒ·¯¿À±â */
	
	public ArrayList<LectureEntity> getErollLecture(){
		
		connect();
		ArrayList<LectureEntity> list=new ArrayList<LectureEntity>();
		
		String sql="select * from enoll_Lec";
		try {
			pstmt=con.prepareStatement(sql);
			re=pstmt.executeQuery();
			
			while(re.next()) {
				LectureEntity lec=new LectureEntity();
				
				
				lec.setId(re.getString("id"));
				lec.setLecName(re.getString("lecName"));
				lec.setCount(re.getInt("count"));
				
				list.add(lec);
			}
			
			re.close();
		
		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			disconnect();
		}
		return list;
}
	
	/*·Î±×ÀÎ µÈ ÈÄ °ú¸ñ¸í ¼±ÅÃÈÄ ¼ö°­Àοø¿¡ ´ëÇÑ  count*/
	public boolean updateEnrollLecture(String[] selectCourse) {
		connect();
		
		String sql="update enroll_Lec set count=count+1 where lecName=?";
		try {
			pstmt=con.prepareStatement(sql);
			
			for(int i=0; i<selectCourse.length; i++) {
				pstmt.setString(1, selectCourse[i]);
				System.out.println(selectCourse[i]);
				pstmt.executeQuery();
			}
			re.close();
		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			disconnect();
			}
		return true;
	}
}