import RandExp from "randexp";

const randomCodeTableB = async (ctx) => {
  try {
    const { id } = ctx.user;
    
    //Generate random code (5 characters) - Current Table(B)
    const code = new RandExp(/^[0-9]{5}$/).gen();

    //check duplicate current table(B)
    const tableB = await TableB.findAll({
      where: {
        code: {
          [Op.ne]: null,
        },
      },
      attributes: ["code"],
    });

    for (let i = 0; i < tableB.length; i++) {
      if (tableB[i].code === code) {
        return await randomCodeTableB(ctx); //Rerandom if duplicate
      }
    }

    //check duplicate with Table A
    const tableA = await TableA.findAll({
      where: {
        code: {
          [Op.ne]: null,
        },
      },
      attributes: ["code"],
    });

    for (let i = 0; i < tableA.length; i++) {
      if (tableA[i].code === code) {
        return await randomCodeTableB(ctx); //Rerandom if duplicate
      }
    }

    //Update code into current lecturer
    const currentUser = await TableB.findByPk(id);

    const updatedCode = await currentUser.update({
      code: code,
    });

    return (ctx.body = {
      msg: "success",
      data: { code: updatedCode.code },
    });
  } catch (error) {
    ctx.response.status = 500;

    return (ctx.body = {
      error: "Internal Server Error",
    });
  }
};