package requests

import (
	"strings"

	"github.com/samber/lo"
)

// SortQueryFilter defines common query sorting parameters used by list endpoints.
type SortQueryFilter struct {
	Asc  *string `json:"asc" form:"asc"`
	Desc *string `json:"desc" form:"desc"`
}

func (filter *SortQueryFilter) AscFields() []string {
	if filter.Asc == nil {
		return nil
	}

	return strings.Split(*filter.Asc, ",")
}

func (filter *SortQueryFilter) DescFields() []string {
	if filter.Desc == nil {
		return nil
	}

	return strings.Split(*filter.Desc, ",")
}

func (filter *SortQueryFilter) DescID() *SortQueryFilter {
	if filter.Desc == nil {
		filter.Desc = lo.ToPtr("id")
	}

	items := filter.DescFields()
	if lo.Contains(items, "id") {
		return filter
	}

	items = append(items, "id")
	filter.Desc = lo.ToPtr(strings.Join(items, ","))

	return filter
}