package useCases

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

func eligibleSiblings(rows []localization.Row, versions []article.Article, served article.Article) []article.Article {
	defaultTag := localization.ConfirmedDefaultTag(rows)
	siblings := []article.Article{}
	for _, version := range versions {
		if version.ID == served.ID || version.SiteID != served.SiteID || !version.IsOnline {
			continue
		}
		if localization.PublicTag(rows, version.Lang) {
			siblings = append(siblings, version)
		}
	}
	slices.SortFunc(siblings, func(left article.Article, right article.Article) int {
		return localization.CompareTags(defaultTag, left.Lang, right.Lang)
	})
	return siblings
}

func storyVersions(repository article.Repository, art article.Article) ([]article.Article, error) {
	if art.StoryID == 0 {
		return []article.Article{}, nil
	}
	return repository.ListByStory(art.StoryID)
}

func alternatesOf(owner site.Site, siblings []article.Article) []article.Alternate {
	alternates := make([]article.Alternate, 0, len(siblings))
	for _, sibling := range siblings {
		alternates = append(alternates, article.Alternate{ID: sibling.ID, Lang: sibling.Lang, StoryID: sibling.StoryID, Slug: sibling.Slug, URL: owner.PublicURL(sibling.Lang, sibling.Slug)})
	}
	return alternates
}

func rowOf(rows []localization.Row, tag string) localization.Row {
	for _, row := range rows {
		if row.Tag == tag {
			return row
		}
	}
	return localization.Row{Tag: tag}
}

func socialLocaleOf(rows []localization.Row, tag string, siteLocale *string) string {
	if resolved := localization.EffectiveSocialLocale(rowOf(rows, tag), siteLocale); resolved != nil {
		return *resolved
	}
	return ""
}