package redis

import (
	"context"
	"time"

	"github.com/pkg/errors"
	"gitlab.com/wpetit/goweb/logger"
)

const (
	baseWatchBackoffDelay = time.Millisecond * 500
	maxDelay              = time.Minute * 10
)

func retryWithBackoff(ctx context.Context, attempts int, fn func(ctx context.Context) error) error {
	backoffDelay := baseWatchBackoffDelay
	count := 0

	for {
		err := fn(ctx)
		if err == nil {
			return nil
		}

		err = errors.WithStack(err)

		count++
		if count >= attempts {
			return errors.Wrapf(err, "execution failed after %d attempts", attempts)
		}

		logger.Error(ctx, "error while executing func, retrying with backoff", logger.E(err), logger.F("backoffDelay", backoffDelay), logger.F("remainingAttempts", attempts-count))

		time.Sleep(backoffDelay)

		backoffDelay *= 2
		if backoffDelay > maxDelay {
			backoffDelay = maxDelay
		}
	}
}