import { Worker } from 'worker_threads'

let workerFarm = []

export function initWorkers(threads) {
    for (let i = 0;  i < threads; ++i) {
        workerFarm.push(new Worker('./libs/utils/multithread/genericWorker.js'))
    }

    for (const i in workerFarm) {
        const worker = workerFarm[i]
        worker.postMessage({
            type: 'setName',
            name: `Worker ${parseInt(i) + 1}`
        })
    }
}

export function spread(threads, script, data, shouldEval) {
    return new Promise((resolve, reject) => {
        const worker = new Worker(
            script,
            {
                workerData: data,
                eval: shouldEval ?? false
            }
        )

        worker.on('message', resolve)
        worker.on('error', reject)
        worker.on('exit', (code) => {
            if (code !== 0)
                reject(new Error(`Process stopped with code: ${code}`))
        })
    })
}