package cyutils

import (
	"sync"
)

func WithWorkers[T any](workers int, arr []T, fn func(worker int, item T)) {
	workersChan := make(chan struct{}, workers)
	ingestChan := make(chan T, len(arr))

	for _, item := range arr {
		ingestChan <- item
	}
	close(ingestChan)

	wg := sync.WaitGroup{}
	for i := 0; i < workers; i++ {
		workersChan <- struct{}{}
		wg.Add(1)
		go func(worker int) {
			defer wg.Done()
			defer func() { <-workersChan }()
			for {
				item, ok := <-ingestChan
				// We're done processing totally
				if !ok {
					return
				}
				fn(worker, item)
			}
		}(i)
	}
	wg.Wait()
}
func Batched[T any](arr []T, batchSize int, fn func(batch []T)) {
	for i := 0; i < len(arr); i += batchSize {
		start := i
		end := min(i+batchSize, len(arr))
		batch := arr[start:end]
		fn(batch)
	}
}