require('dotenv').config();
const express = require('express');
const cors = require('cors');
const mime = require('mime');
const database = require("./config/database");
const media = require("./models/Media");
const app = express();

database.authenticate()
    .then(() => console.log("Connected to " + process.env.MYSQL_HOSTNAME + " with user " + process.env.MYSQL_USERNAME))
    .catch(err => console.log("An error occurred while connecting to database: " + err));

app.use(cors());

app.get("/:resourceID", (req, res) => {
    const resource = req.params.resourceID.split(".")
    if (resource.length < 2)
        return res.status(400).json({message: "The specified URL is not in the correct format"});
    media.findOne({where: {assetID: resource[0], assetEnding: resource[resource.length - 1]}})
        .then(r  => {
            require('fs').readFile(process.env.CDN_MEDIA_PATH+"/"+r.assetID, (err, data) =>
                res.header("Content-Type", mime.lookup(r.assetEnding)).send(data)
            );
        })
        .catch(() => res.status(404).json({message: "The specified file was not found."}));
});

app.get('*', (req, res) => {
    res.status(400).json({message: "The specified URL is not in the correct format"});
});

app.listen(process.env.SERVER_PORT || 3000);