import dotenv from 'dotenv';
import * as fs from 'node:fs';
import { fileURLToPath } from 'url';
import { dirname } from 'path';
import { execSync } from "child_process";

dotenv.config({path: ['.env','.env.local'], debug: false, quiet: true});

export const environment = {
    config: process.env.CONFIG || 'config.json',
    hostname: process.env.HOSTNAME || execSync('hostname', { encoding: "utf-8" }) || 'localhost',
    gpsd: process.env.GPSD || 2947,
    port: process.env.PORT || 80,
    root: dirname(dirname(fileURLToPath(import.meta.url))),
    settings: {},
}

if(!environment.config.startsWith('/')) environment.config = `${environment.root}/${environment.config}`;

export function loadSettings() {
    if(!fs.existsSync(environment.config)) fs.writeFileSync(environment.config, '', { flag: 'a' });
    const value = fs.readFileSync(environment.config, 'utf-8');
    try { return JSON.parse(value); }
    catch (e) {
        return {
            lora: {
                mode: 'MESH',
                telemetry: true,
            }
        };
    }
}

export function saveSettings() {
    fs.writeFileSync(environment.config, JSON.stringify(environment.settings, null, 4));
}

loadSettings();