const express = require('express');
const router = express.Router();
const multer = require('multer');
const path = require('path');
const fs = require('fs');
const authorize = require('../../../../middlewares/authorize-sapps');
const documentService = require('./document.service');

const storage = multer.diskStorage({
    destination: function (req, file, cb) {
        cb(null, './public/data/documents/');
    },
    filename: function (req, file, cb) {
        cb(null, Date.now() + '-' + file.originalname);
    }
});

const upload = multer({ storage: storage });

router.post('/create', authorize(), upload.single('filename'), create);
router.get('/', authorize(), getAll);
router.get('/filter', authorize(), filter);
router.get('/option', authorize(), option);
router.get('/count', authorize(), count);
router.get('/get-filename/:id', getFilename);
router.put('/:id', authorize(), upload.single('filename'), update);
router.put('/enabled/:id', authorize(), enabled);
router.delete('/:id', authorize(), _delete);

module.exports = router;

function create(req, res, next) {
    const userData = {
        ...req.body,
        filename: req.file ? req.file.filename : null
    };

    documentService.create(userData)
        .then(result => res.json(result))
        .catch(next);
}

function getAll(req, res, next) {
    documentService.getAll(req.query)
        .then(result => res.json(result))
        .catch(next);
}

function filter(req, res, next) {
    documentService.filter(req.query)
        .then(result => res.json(result))
        .catch(next);
}

function option(req, res, next) {
    documentService.option()
        .then(result => res.json(result))
        .catch(next);
}

function count(req, res, next) {
    documentService.count()
        .then(result => res.json(result))
        .catch(next);
}

function update(req, res, next) {
    const updateData = {
        ...req.body,
        filename: req.file ? req.file.filename : req.body.filename ? req.body.filename : null
    };

    documentService.update(req.params.id, updateData)
        .then(result => res.json(result))
        .catch(next);
}

function enabled(req, res, next) {
    documentService.enabled(req.params.id, req.body)
        .then(result => res.json(result))
        .catch(next);
}

function _delete(req, res, next) {
    documentService.delete(req.params.id)
        .then(result => res.json(result))
        .catch(next);
}

function getFilename(req, res, next) {
    try {
        const filePath = path.join(__dirname, `../../../../public/data/documents/${req.params.id}`);

        if (!fs.existsSync(filePath)) {
            return res.status(404).json({ message: 'File not found' });
        }

        res.setHeader('Content-Disposition', `inline; filename="${req.params.id}"`);
        res.setHeader('Content-Type', 'application/pdf');

        res.sendFile(filePath, (err) => {
            if (err) {
                console.error('Error sending file: ', err);
                return res.status(500).json({ message: 'Internal server error' });
            }
        });
    } catch (error) {
        console.error('Error in getFilename:', error);
        res.status(500).json({ message: 'Internal server error' });
    }
}
