package classes

import (
	"context"
	"strconv"
	"strings"

	"git.golem15.com/golem15/sm-seo-plugin/classes/schema"
	"git.golem15.com/golem15/sm-seo-plugin/models"
	"git.golem15.com/golem15/summercms/modules/pact"
	"gorm.io/gorm"
)

// PhraseIn renders a phrase key in locale; the key itself when the
// application has no translator.
func (s *Service) PhraseIn(locale, key string, params map[string]string) string {
	tr := s.translator()
	if tr == nil {
		return key
	}
	return tr.GetIn(locale, key, params)
}

// SearchURL is the configured site search address, "" when unset.
func (s *Service) SearchURL() string {
	if cfg := s.Config(); cfg != nil {
		return strings.TrimSpace(cfg.String(SearchURLConfigKey))
	}
	return ""
}

// SameAsLines splits a sameAs list into its trimmed, non-empty lines.
func SameAsLines(list string) []string {
	var out []string
	for _, line := range strings.Split(strings.ReplaceAll(list, "\r\n", "\n"), "\n") {
		if v := strings.TrimSpace(line); v != "" {
			out = append(out, v)
		}
	}
	return out
}

// PublisherOf is the settings' publisher in locale (D-45): its name is the
// translated publisher name (empty: the site name, filled by the builder),
// URLs absolute on the site, and the local business data only for an
// organisation with the switch on.
func (s *Service) PublisherOf(ctx context.Context, db *gorm.DB, settings models.Settings, locale string) schema.Publisher {
	site := s.SiteURL()
	p := schema.Publisher{
		Type:  schema.PublisherOrganization,
		Name:  strings.TrimSpace(s.translatedSetting(ctx, db, &settings, "publisher_name", settings.PublisherName, locale)),
		Email: strings.TrimSpace(settings.PublisherEmail),
		Phone: strings.TrimSpace(settings.PublisherPhone),
	}
	if settings.PublisherType == models.PublisherPerson {
		p.Type = schema.PublisherPerson
	}
	if logo := strings.TrimSpace(settings.PublisherLogo); logo != "" {
		p.Logo = AbsoluteURL(site, logo)
	}
	if u := strings.TrimSpace(settings.PublisherURL); u != "" {
		p.URL = AbsoluteURL(site, u)
	}
	p.SameAs = SameAsLines(settings.PublisherSameAs)
	if settings.LocalEnabled && p.Type == schema.PublisherOrganization {
		l := &schema.Local{
			Type:       strings.TrimSpace(settings.LocalType),
			PriceRange: strings.TrimSpace(settings.LocalPriceRange),
			Street:     strings.TrimSpace(settings.LocalStreet),
			PostalCode: strings.TrimSpace(settings.LocalPostalCode),
			City:       strings.TrimSpace(settings.LocalCity),
			Region:     strings.TrimSpace(settings.LocalRegion),
			Country:    strings.TrimSpace(settings.LocalCountry),
		}
		if lat, err := strconv.ParseFloat(strings.TrimSpace(settings.LocalLatitude), 64); err == nil {
			if lng, err := strconv.ParseFloat(strings.TrimSpace(settings.LocalLongitude), 64); err == nil {
				l.Latitude, l.Longitude = &lat, &lng
			}
		}
		for _, h := range settings.Hours() {
			l.Hours = append(l.Hours, schema.Hours{Day: h.Day, Opens: h.Opens, Closes: h.Closes})
		}
		p.Local = l
	}
	return p
}

// pageVariant is the registry kind of a registry page, "" for other types.
func pageVariant(db *gorm.DB, key, id string) string {
	if key != PageTypeKey || id == "" {
		return ""
	}
	kinds, err := pageKinds(db, []string{id})
	if err != nil {
		return ""
	}
	return kinds[id]
}

// structuredIn holds what resolveAt hands to the structured data.
type structuredIn struct {
	key      string
	id       string
	rec      *pact.ContentRecord
	entry    models.Entry
	content  pact.ContentLocale
	locale   string
	path     string
	url      string
	home     bool
	siteName string
	seo      *SEO
}

// graphInput composes the builder's input of a page.
func (s *Service) graphInput(ctx context.Context, db *gorm.DB, settings models.Settings, in structuredIn, crumbs []schema.Crumb) schema.Input {
	site := s.SiteURL()
	name := strings.TrimSpace(in.content.Title)
	if name == "" && in.home {
		name = in.siteName
	}
	if name == "" && in.seo != nil {
		name = in.seo.Title
	}
	gi := schema.Input{
		Site:      site,
		URL:       in.url,
		Lang:      LangTag(in.locale),
		Home:      in.home,
		Name:      name,
		Headline:  strings.TrimSpace(in.content.Title),
		Crumbs:    crumbs,
		SiteName:  in.siteName,
		SearchURL: s.SearchURL(),
		Publisher: s.PublisherOf(ctx, db, settings, in.locale),
		Words:     in.content.Words,
	}
	if in.seo != nil {
		gi.Description = in.seo.Description
	}
	if in.key != "" {
		if typ, ok := s.Registry().ContentType(in.key); ok && typ.Content != nil {
			gi.Kind = typ.Content.Kind
		}
		gi.Variant = pageVariant(db, in.key, in.id)
	}
	seen := map[string]bool{}
	addImage := func(u string) {
		if u = strings.TrimSpace(u); u == "" {
			return
		}
		u = AbsoluteURL(site, u)
		if !seen[u] {
			seen[u] = true
			gi.Images = append(gi.Images, u)
		}
	}
	for _, img := range in.content.Images {
		if !img.Decorative {
			addImage(img.URL)
		}
	}
	addImage(in.content.Image)
	if len(gi.Images) == 0 && in.seo != nil {
		addImage(in.seo.OG.Image)
	}
	if rec := in.rec; rec != nil {
		gi.PublishedAt, gi.ModifiedAt = rec.PublishedAt, rec.LastMod
		for _, a := range rec.Authors {
			p := schema.Person{Name: a.Name}
			if a.Ref.Type != "" {
				if l, ok := s.describeLocale(ctx, a.Ref, in.locale); ok {
					p.URL = AbsoluteURL(site, l.URL)
				}
			}
			gi.Authors = append(gi.Authors, p)
		}
		for _, v := range in.content.Videos {
			gi.Videos = append(gi.Videos, schema.Video{Provider: v.Provider, ID: v.ID})
		}
	}
	if len(crumbs) >= 3 {
		gi.Section = crumbs[len(crumbs)-2].Name
	}
	return gi
}

// describeLocale describes a referenced record in locale.
func (s *Service) describeLocale(ctx context.Context, ref pact.ContentRef, locale string) (pact.ContentLocale, bool) {
	reg := s.Registry()
	if reg == nil {
		return pact.ContentLocale{}, false
	}
	rec, err := reg.Describe(ctx, ref.Type, ref.ID, s.UnprefixedLocale())
	if err != nil || rec == nil || !rec.Published {
		return pact.ContentLocale{}, false
	}
	return localeOf(rec, locale)
}

// structuredData fills the structured keys of an ok answer: html_lang,
// og:locale and its alternates, the hreflang alternates, the breadcrumb
// trail and the JSON-LD graph (D-43, D-55 to D-57, D-86).
func (s *Service) structuredData(ctx context.Context, db *gorm.DB, settings models.Settings, res *Result, in structuredIn) error {
	res.HTMLLang = LangTag(in.locale)
	if res.SEO != nil {
		res.SEO.OG.Locale = s.OGLocale(in.locale)
		res.SEO.OG.LocaleAlternates = s.OGLocaleAlternates(in.rec, in.locale)
	}
	res.Alternates = Alternates(s.SiteURL(), in.rec, s.DefaultLocale(ctx, db))
	name := strings.TrimSpace(in.content.Title)
	if name == "" && res.SEO != nil {
		name = res.SEO.Title
	}
	res.Breadcrumbs = s.Trail(ctx, db, settings, in.rec, entryData(in.entry, DataPrimaryParent), in.locale, in.path, name)
	graph, err := schema.Build(ctx, s.graphInput(ctx, db, settings, in, res.Breadcrumbs))
	if err != nil {
		return err
	}
	res.JSONLD = graph
	return nil
}