/* Pellet Stove Control Panel
 * Web Configuration Server
 * v0.0.0 by Skylar Grant
 * 
 * TODOs: 
    * Implement Express to make it easier
    * Add actual data into the responses
 */

// Modules
const express = require('express');
const http = require('http');
const fs = require('fs');
const fn = require('./functions.js').functions;
const { dbfn } = require('./functions.js');

// Grab the current configuration settings from the database to display
var config;
fn.commands.refreshConfig().then(newConfig => {
    config = newConfig.config;
});

// Create the server
const app = express();
const server = http.createServer(app);
app.use(express.urlencoded());
// Our root directory for the public web files
app.use(express.static(__dirname + '/../www/public'));
// Our directory for views used to render the pages
app.set('views', __dirname + '/../www/views');
// Set .html as the file extension for views
app.engine('html', require('ejs').renderFile);
app.set('view engine', 'html');

// A normal load of the root page
app.get('/', (req, res) => {
    // Render the page, passing the config along for the front end to use
    res.render('index', { config: JSON.stringify(config) });
});

// A POST form submission to the root page
app.post('/', (req, response) => {
    if (req.body.augerOn != undefined) {
        fn.commands.augerOn();
        fn.commands.refreshConfig().then(res => {
            config = res.config;
            response.render('index', { config: JSON.stringify(config) });
            return;
        });
        return;
    }
    if (req.body.augerOff != undefined) {
        fn.commands.augerOff();
        fn.commands.refreshConfig().then(res => {
            config = res.config;
            response.render('index', { config: JSON.stringify(config) });
            return;
        });
        return;
    }

    if (req.body.igniterOn != undefined) {
        fn.commands.igniterOn();
        fn.commands.refreshConfig().then(res => {
            config = res.config;
            response.render('index', { config: JSON.stringify(config) });
            return;
        });
        return;
    }
    if (req.body.igniterOff != undefined) {
        fn.commands.igniterOff();
        fn.commands.refreshConfig().then(res => {
            config = res.config;
            response.render('index', { config: JSON.stringify(config) });
            return;
        });
        return;
    }

    if (req.body.exhaustOn != undefined) {
        fn.commands.exhaustOn();
        fn.commands.refreshConfig().then(res => {
            config = res.config;
            response.render('index', { config: JSON.stringify(config) });
            return;
        });
        return;
    }
    if (req.body.exhaustOff != undefined) {
        fn.commands.exhaustOff();
        fn.commands.refreshConfig().then(res => {
            config = res.config;
            response.render('index', { config: JSON.stringify(config) });
            return;
        });
        return;
    }


    if (req.body.reload != undefined) {
        const updateAugerOffIntervalQuery = `UPDATE intervals SET value = '${2000 - req.body.feedRate}' WHERE key = 'auger_off'`;
        const updateAugerOnIntervalQuery = `UPDATE intervals SET value = '${req.body.feedRate}' WHERE key = 'auger_on'`;
        dbfn.run(updateAugerOffIntervalQuery).then(res => {
            if (process.env.DEBUG) console.log(`[${(Date.now() - config.timestamps.procStart)/1000}] I: Auger off interval updated: ${res.data.changes}`);
            dbfn.run(updateAugerOnIntervalQuery).then(res => {
                if (process.env.DEBUG) console.log(`[${(Date.now() - config.timestamps.procStart)/1000}] I: Auger on interval updated: ${res.data.changes}`);
                fn.commands.refreshConfig().then(res => {
                    config = res.config;
                    response.render('index', { config: JSON.stringify(config) });
                    return;
                });
            }).catch(err => console.log(`E: ${err}`));
        }).catch(err => console.log(`E: ${err}`));
        return;
    }
    if (req.body.quit != undefined) {
        fs.appendFile('quit', ".", err => {
            if (err) console.error(err);
        });
        fn.commands.refreshConfig().then(res => {
            config = res.config;
            response.render('index', { config: JSON.stringify(config) });
            return;
        });
        return;
    }
    fn.commands.refreshConfig().then(res => {
        config = res.config;
        response.render('index', { config: JSON.stringify(config) });
        return;
    });
});

module.exports = {
    start: () => {
        server.listen(8080, "0.0.0.0");
    }
};