import fs from 'fs';
import { exec, execSync } from 'child_process';
import { promisify } from 'util';

const execPromise = promisify(exec);

export function installDeps() {
    // check if node_modules exists
    if (fs.existsSync('./node_modules')) {
        return;
    }

    // install dependencies
    console.log('Installing mandatory dependencies...');
    execSync('npm install --omit=dev', { stdio: 'inherit' });
    console.log('Mandatory dependencies installed');

    // install dev dependencies (in the background)
    console.log(); console.log(); console.log();
    console.log('Installing dev dependencies...');
    installDevDeps();
}

async function installDevDeps(attempt = 1) {
    try {
        await execPromise('npm install', { stdio: 'inherit' });
        console.log('Dev dependencies installed');
    } catch (error) {
        console.error('Error installing dev dependencies:', error.message);

        if (attempt < 3) {
            const retryDelay = 5000 * attempt;
            console.log(`Retrying in ${Math.round(retryDelay / 1000)} seconds...`);
            setTimeout(() => installDevDeps(attempt + 1), retryDelay);
        } else {
            console.error('Failed to install dev dependencies.');
            console.error('Please try again manually, by running "npm install" in the project directory.');
        }
    }
}