package vector

import (
	"mal-go/list"
	"mal-go/utils"
	"strings"
)

// TODO: replace COW with proper HashArrayMappedTrie impelmentation of PersistentVector

type Vector struct {
	_slice []any
}

func New() *Vector {
	return new(Vector).Init()
}

func (this *Vector) Init() *Vector {
	this._slice = make([]any, 0)
	return this
}

func Conj(this *Vector, data any) *Vector {
	newVec := New()
	for _, el := range this._slice {
		newVec._slice = append(newVec._slice, el)
	}
	newVec._slice = append(newVec._slice, data)
	return newVec
}

func (this *Vector) Conj(data any) *Vector {
	return Conj(this, data)
}

func String(this *Vector) string {
	if this == nil {
		return "[]"
	}
	var sb strings.Builder
	sb.WriteRune('[')
	for _, el := range this._slice {
		sb.WriteString(utils.Stringify(el))
		sb.WriteRune(' ')
	}
	return sb.String()[:sb.Len()-1] + "]"
}

func (this *Vector) String() string {
	return String(this)
}

func ToList(this *Vector) list.IList {
	l := list.Empty()
	for i := len(this._slice) - 1; i >= 0; i-- {
		l = list.Conj(l, this._slice[i])
	}
	return l
}

func (this *Vector) ToList() list.IList {
	return ToList(this)
}