package calc

import (
	"gitea.zaclys.com/bvaudour/gob/number"
	"gitea.zaclys.com/bvaudour/gob/option"
)

type Registry map[string]Stack

func (r Registry) Exists(k string) (ok bool) {
	_, ok = r[k]
	return
}

func (r Registry) Set(k string, numbers ...number.Number) {
	r[k] = numbers
}

func (r Registry) Get(k string) (result option.Result[Stack]) {
	if s, ok := r[k]; ok {
		result = option.Ok(s.Clone())
	} else {
		result = option.Err[Stack](ErrNotExist(reg(k)))
	}

	return
}

func (r Registry) Reset(k string) (err option.Option[error]) {
	if r.Exists(k) {
		delete(r, k)
	} else {
		err = option.Some(ErrNotExist(reg(k)))
	}

	return
}

func (r Registry) ResetAll() (err option.Option[error]) {
	if len(r) > 0 {
		for k := range r {
			delete(r, k)
		}
	} else {
		err = option.Some(ErrIsEmpty(errMemory))
	}

	return
}

func (r Registry) Clone() Registry {
	out := make(Registry)
	for k, s := range r {
		out[k] = s.Clone()
	}

	return out
}