const gulp = require('gulp');
const log = require('gulplog');
const { spawn } = require('child_process');
const package = require('./package.json');

gulp.task('dev', (cb) => {
    log.info('Running in development mode');

    /** @type {import('child_process').ChildProcessWithoutNullStreams} */
    let node = null;

    async function spawnNode(cb){
        log.info('Spawning node');
        if (node !== null) {
            node.kill(9);
            console.log('----- END PROCESS LOG -----')
            // grace period
            await new Promise(r => {setTimeout(r, 100)});
        }


        log.info(`Command: \x1b[35mnode  "${package.main}"`);
        console.log('----- BEGIN PROCESS LOG -----');
        node = spawn('node', [ package.main ], { stdio: 'inherit' });
        if (typeof cb == 'function')
            cb();
    }

    gulp.watch('**', { events: 'all' }, spawnNode);
    spawnNode();
    // cb();
})