const express = require('express');
const bodyParser = require('body-parser');
const cors = require('cors');
const app = express();
const templates = require('./templates');
const renderer = require('./renderer');

const {getPdfPath} = require('./utils');

app.use(bodyParser.json());

app.options('/pdf/generate/:template', cors());
app.post('/pdf/generate/:template', cors(), (req, res) => {

    const templateName = req.params.template;
    const options = req.body;

    templates.get(templateName, options, (err, texDocument) => {
        if (err) {
            console.error('Error:', err.code, 'for', req.url);
            res.sendStatus(500).end('Something went wrong while generating Tex source');
            return;
        }

        renderer(texDocument, (err, pdfFilePath) => {
            if (err) {
                console.error('Error:', err.code, 'for', req.url);
                res.sendStatus(500).end('Something went wrong while baking the PDF');
                return;
            }
            const id = pdfFilePath.replace('/tmp/', '');
            res.send({id: id});
            res.end();
        });
    });
});

app.options('/pdf/:id', cors());
app.get('/pdf/:id', cors(), (req, res) => {
    const {id} = req.params;
    res.sendFile(getPdfPath(id));
});

app.use(express.static('dist'));

app.listen(5000);