/**
 * 
 */
package com.permission.dao.impl;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.permission.dao.IUserFunctionDAO;
import com.permission.sys.BaseDAO;
import com.permission.sys.PageRoll;
import com.permission.utils.common.PermissionException;
import com.permission.utils.db.DBUtil;
import com.permission.vo.UserFunction;

/**
 * @author Jack
 * 
 */
public class UserFunctionDAOImpl extends BaseDAO implements IUserFunctionDAO {

	@Override
	public UserFunction findByFunctionID(Integer functionID)
			throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		UserFunction userFunction = null;
		String sql = "select FunctionID,FunctionCode,FunctionName from UserFunction where FunctionID=?";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			ps.setInt(1, functionID);
			rs = ps.executeQuery();
			if (rs.next()) {
				userFunction = new UserFunction();
				userFunction.setFunctionID(rs.getInt(1));
				userFunction.setFunctionCode(rs.getString(2));
				userFunction.setFunctionName(rs.getString(3));
			}
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("查询功能失败");
		} finally {
			DBUtil.close(rs, ps, conn);
		}
		return userFunction;
	}

	// 分页查询功能列表
	@Override
	public List<UserFunction> list(PageRoll pageRoll) throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		List<UserFunction> list = new ArrayList<UserFunction>();
		String sql = "select u.FunctionID,u.FunctionCode,u.FunctionName from userfunction u limit ?,?";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			ps.setInt(1, (pageRoll.getCurrPage() - 1) * pageRoll.getPageSize());
			ps.setInt(2, pageRoll.getPageSize());
			rs = ps.executeQuery();
			while (rs.next()) {
				UserFunction userFunction = new UserFunction();
				userFunction.setFunctionID(rs.getInt(1));
				userFunction.setFunctionCode(rs.getString(2));
				userFunction.setFunctionName(rs.getString(3));
				list.add(userFunction);
			}
			sql = "select count(*) from userfunction";
			ps = conn.prepareStatement(sql);
			rs = ps.executeQuery();
			rs.next();
			pageRoll.setCountSize(rs.getInt(1));
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("查询功能列表失败");
		} finally {
			DBUtil.close(rs, ps, conn);
		}
		return list;
	}

	//查询该角色已授权的功能
	@Override
	public List<UserFunction> functions(Integer roleID)
			throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		List<UserFunction> list = new ArrayList<UserFunction>();
		String sql = "select f.functionID,f.functionCode,f.functionName from UserFunction f,RoleAndFunction rf where rf.functionID=f.functionID and rf.roleID=?";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			ps.setInt(1, roleID);
			rs = ps.executeQuery();
			while (rs.next()) {
				UserFunction userFunction = new UserFunction();
				userFunction.setFunctionID(rs.getInt(1));
				userFunction.setFunctionCode(rs.getString(2));
				userFunction.setFunctionName(rs.getString(3));
				list.add(userFunction);
			}
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("根据角色ID查询该角色已有的功能列表失败");
		} finally {
			DBUtil.close(rs, ps, conn);
		}
		return list;
	}

	//查询该角色未授权的功能
	@Override
	public List<UserFunction> notFunctions(Integer roleID)
			throws PermissionException {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		List<UserFunction> list = new ArrayList<UserFunction>();
		String sql = "select u.functionID,u.functionCode,u.functionName from userFunction u where not exists (select 1 from roleandfunction rf where roleID=? and rf.functionID=u.functionID)";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			ps.setInt(1, roleID);
			rs = ps.executeQuery();
			while (rs.next()) {
				UserFunction userFunction = new UserFunction();
				userFunction.setFunctionID(rs.getInt(1));
				userFunction.setFunctionCode(rs.getString(2));
				userFunction.setFunctionName(rs.getString(3));
				list.add(userFunction);
			}
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("根据角色ID查询该角色没有的功能列表失败");
		} finally {
			DBUtil.close(rs, ps, conn);
		}
		return list;
	}

	// 项目启动时，加载系统功能列表
	@Override
	public List<UserFunction> list() throws PermissionException {
		// TODO Auto-generated method stub
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		List<UserFunction> list = new ArrayList<UserFunction>();
		String sql = "select FunctionID,FunctionCode,FunctionName from UserFunction";
		try {
			conn = DBUtil.getConnection();
			ps = conn.prepareStatement(sql);
			rs = ps.executeQuery();
			while (rs.next()) {
				UserFunction userFunction = new UserFunction();
				userFunction.setFunctionID(rs.getInt(1));
				userFunction.setFunctionCode(rs.getString(2));
				userFunction.setFunctionName(rs.getString(3));
				list.add(userFunction);
			}
		} catch (SQLException e) {
			e.printStackTrace();
			throw new PermissionException("查询功能列表失败");
		} finally {
			DBUtil.close(rs, ps, conn);
		}
		return list;
	}
	

}