package love.sola.netsupport.util;

import love.sola.netsupport.enums.Attribute;
import love.sola.netsupport.enums.Block;
import love.sola.netsupport.enums.ISP;
import love.sola.netsupport.wechat.Command;
import love.sola.netsupport.wechat.WechatSession;
import me.chanjar.weixin.common.session.WxSession;

import javax.servlet.http.HttpServletRequest;

/**
 * ***********************************************
 * Created by Sola on 2015/12/12.
 * Don't modify this source without my agreement
 * ***********************************************
 */
public class Checker {

	public static final String STUDENT_ID_REGEX = "^(2010|2012|2013|2014|2015)[0-9]{9}$";
	public static final String PHONE_NUMBER_REGEX = "^1[34578][0-9]{9}$";

	public static boolean hasNull(Object... v) {
		for (Object o : v) if (o == null) return true;
		return false;
	}

	public static WxSession isAuthorized(HttpServletRequest r, Command c) {
		String t = r.getParameter("token");
		if (t == null || t.isEmpty()) return null;
		WxSession s = WechatSession.get(t, false);
		return s == null ? null : s.getAttribute(Attribute.AUTHORIZED) == c ? s : null;
	}

	public static long checkStudentId(String studentId) {
		if (studentId == null) return -1;
		if (studentId.matches(STUDENT_ID_REGEX)) {
			try {
				return Long.parseLong(studentId);
			} catch (NumberFormatException ignored) {
			}
		}
		return -1;
	}

	public static long checkPhoneNumber(String phone) {
		if (phone == null) return -1;
		if (!phone.matches(PHONE_NUMBER_REGEX)) return -1;
		try {
			return Long.parseLong(phone);
		} catch (NumberFormatException ignored) { }
		return -1;
	}

	public static ISP checkISP(String isp) {
		if (isp == null) return null;
		try {
			return ISP.fromId(Integer.parseInt(isp));
		} catch (NumberFormatException ignored) { }
		return null;
	}

	public static String checkNetAccount(String account, ISP isp) {
		if (isp == null) return null;
		if (account == null) return null;
		if (!account.matches(isp.accountRegex)) return null;
		return account;
	}

	public static int checkBlock(String block) {
		if (block == null) return -1;
		try {
			int b = Integer.parseInt(block);
			if (Block.inverseMap.containsKey(b))
				return b;
			else
				return -1;
		} catch (NumberFormatException ignored) { }
		return -1;
	}

	public static int checkRoom(String room, int block) {
		if (block == -1) return -1;
		if (room == null) return -1;
		try {
			Integer i = Integer.parseInt(room);
			if (Block.checkRoom(block, i))
				return i;
			else
				return -1;
		} catch (NumberFormatException ignored) { }
		return -1;
	}

}