package useCases

import (
	"RenewCMS/internal/domain/localization"
	"RenewCMS/internal/domain/site"
	"cmp"
	"slices"
)

type GetLanguageSetupUseCase struct {
	sites        site.Repository
	localization localization.Repository
}

func NewGetLanguageSetupUseCase(sites site.Repository, localization localization.Repository) *GetLanguageSetupUseCase {
	return &GetLanguageSetupUseCase{sites, localization}
}

func (g *GetLanguageSetupUseCase) Get() (localization.SetupView, error) {
	pending, err := pendingSites(g.sites, g.localization)
	if err != nil {
		return localization.SetupView{}, err
	}
	view := localization.SetupView{Sites: []localization.PendingSite{}, Available: localization.Available()}
	for _, found := range pending {
		view.Sites = append(view.Sites, localization.NewPendingSite(found))
	}
	return view, nil
}

func pendingSites(sites site.Repository, repository localization.Repository) ([]site.Site, error) {
	all, err := sites.List()
	if err != nil {
		return nil, err
	}
	confirmed, err := repository.ConfirmedSites()
	if err != nil {
		return nil, err
	}
	pending := []site.Site{}
	for _, candidate := range all {
		if !confirmed[candidate.ID] {
			pending = append(pending, candidate)
		}
	}
	slices.SortFunc(pending, func(left site.Site, right site.Site) int { return cmp.Compare(left.ID, right.ID) })
	return pending, nil
}