const connection = require('../conf/connection.js');
const express = require('express');
const fs = require('fs');

var app = express()

function query(consulta) {
    return new Promise(function(resolve, reject) {
        connection.query(`${consulta}`, (error, results, files) => {
            if (error) reject(error);
            resolve(results);
        });
    })
}



app.get('/eliminar_persona', async(req, res) => {
    try {
        let id = req.query.id_persona;
        let cad = `select * from asistencia where id_persona=${id};`;
        let ans = await query(cad);
        for (let i = 0; i < ans.length; i++) {
            let n_cad = `update evento set cupo=cupo+1 where id_evento=${ans[i].id_evento};`;
            let n_ans = await query(n_cad);
        }
        cad = `delete from asistencia where id_persona=${id};`;
        ans = await query(cad);
        cad = `delete from alumno where id_persona=${id};`;
        ans = await query(cad);
        cad = `delete from academico where id_persona=${id};`;
        ans = await query(cad);
        cad = `delete from factura where id_persona=${id};`;
        ans = await query(cad);
        cad = `delete from persona where id_persona=${id};`;
        ans = await query(cad);


        if (fs.existsSync(`./files/carta_aceptacion-${id}.docx`)) {
            fs.unlinkSync(`./files/carta_aceptacion-${id}.docx`);

        }


        if (fs.existsSync(`./files/comprobante_pago-${id}.docx`)) {
            fs.unlinkSync(`./files/comprobante_pago-${id}.docx`);
        }



        res.status(200).json({ error: false, msj: "exito" });

        return;
    } catch (err) {
        console.log(err);
        return res.status(400).json({ error: true, msj: "Error al eliminar los datos" });
    }

});

module.exports = app;