const execQuery = require('../connector');
const express = require('express');
const router = express.Router();
const fileUtils = require('../utils/fileUtils');
const formUtils = require('../utils/formUtils');
const formidable = require("formidable");

const routes = function () {

    router.get('/list', (req, res) => {
        execQuery('SELECT * FROM listcourses;', [], req, res);
    });

    router.get('/get/:id', (req, res) => {
        const id = req.params.id;
        execQuery('SELECT * FROM courses WHERE id = ?;', [id], req, res);
    });

    router.post('/create', (req, res) => {
        let body = new formidable.IncomingForm();
        body.maxFileSize = 1024 * 1024 * 1024;
        body.parse(req, function (err, fields, files) {
            const pdf = files.pdf;
            const form = formUtils.normalizarFormulario(fields);
            const query = 'INSERT INTO courses (description, enabled, duration, ext) VALUES (?, ?, ?, ?);';
            execQuery(
                query, 
                [form.description, form.enabled, form.duration, ".pdf"], 
                req, 
                res, 
                async (results, callback) => {
                    const courseId = results["insertId"];

                    if (pdf && pdf.length > 0) {
                        await fileUtils.salvarPDF(pdf[0], "course_" + courseId);
                    }

                    callback(results);
                }
            );
        });
    });

    router.post('/update', (req, res) => {
        let body = new formidable.IncomingForm();
        body.maxFileSize = 1024 * 1024 * 1024;
        body.parse(req, function (err, fields, files) {
            const pdf = files.pdf;
            const form = formUtils.normalizarFormulario(fields);
            const query = 'UPDATE courses SET description = ?, enabled = ?, duration = ? WHERE id = ?;';
            execQuery(
                query, 
                [form.description, form.enabled, form.duration, form.id], 
                req, 
                res, 
                async (results, callback) => {
                    const courseId = form.id;

                    if (pdf && pdf.length > 0) {
                        await fileUtils.salvarPDF(pdf[0], "course_" + courseId);
                    }

                    callback(results);
                }
            );
        });
    });

    router.delete('/delete/:id', (req, res) => {
        const id = req.params.id;
        execQuery('DELETE FROM courses WHERE id = ?;', [id], req, res, async (results, callback) => {
            const diretorioParaExcluir = './pdfs/course_' + id.toString() + ".pdf";
            await fileUtils.excluirArquivo(diretorioParaExcluir);

            callback(results);
        });
    });

    return router;
}

module.exports = routes;