const fs = require('fs');
const express = require('express');
const pug = require('pug');
const app = express();
const port = 8000;

function parse(data) {
    let content = JSON.parse(data);
    let parsed = {ais: [], battles: {}};
    for (let ai of content.ais) {
        parsed.ais.push({
            name: ai,
            victories: 0,
            defeats: 0,
        });
    }

    for (let key in content.battles) {
        let battlers = key.split('/');
        let ai1 = battlers[0];
        let ai2 = battlers[1];
        parsed.battles[ai1 + '/' + ai2] = Math.floor(100 * content.battles[key]);
        parsed.battles[ai2 + '/' + ai1] = 100 - parsed.battles[ai1 + '/' + ai2];
    }
    parsed.sortedAis = parsed.ais.slice(0);

    parsed.sortedAis.sort((a, b) => {
        if (a.victories < b.victories) {
            return -1;
        } else if (a.victories > b.victories) {
            return 1;
        } else {
            if (a.defeats > b.defeats) {
                return -1;
            } else if (a.defeats < b.defeats) {
                return 1;
            } else {
                return 0;
            }
        }
    });

    return parsed;
}

app.set('view engine', 'pug');

app.get('/', (req, res) => {
    fs.readFile('assets/data.json', 'utf-8', (err, data) => {
        if (err != null) {
            console.log("Error: " + e);
        }
        let parsed = parse(data);
        res.render('index', parsed);
    });
});

app.use('/static', express.static('static'));

app.listen(port, () => {
    console.log(`Example app listening on port ${port}!`)
})