package ring

import "fmt"

const DefaultGrowthFactor = 2

const DefaultCapacity = 16

type config struct {
	capacity     uint64
	growthFactor uint64
}

type Option func(*config)

func GrowthFactor(value int) Option {
	if value <= 1 {
		panic(fmt.Errorf("go-ring: growth factor must be greater than 1, got %d", value))
	}

	return func(c *config) {
		c.growthFactor = uint64(value)
	}
}

func Capacity(value int) Option {
	if value < 0 {
		panic(fmt.Errorf("go-ring: starting capacity must be non-negative, got %d", value))
	}

	return func(c *config) {
		c.capacity = uint64(value)
	}
}