package sites

import (
	"context"
	"errors"
	"github.com/jackc/pgx/v5"
	"lmika.dev/lmika/hugo-cms/config"
	"lmika.dev/lmika/hugo-cms/models"
	"lmika.dev/lmika/hugo-cms/providers/db"
	"lmika.dev/lmika/hugo-cms/providers/themes"
	"lmika.dev/lmika/hugo-cms/services/jobs"
	"lmika.dev/lmika/hugo-cms/services/sitebuilder"
	"strings"
	"unicode"
)

type Service struct {
	cfg    config.Config
	db     *db.DB
	themes *themes.Provider
	sb     *sitebuilder.Service
	jobs   *jobs.Service
}

func NewService(
	cfg config.Config,
	db *db.DB,
	themes *themes.Provider,
	sb *sitebuilder.Service,
	jobs *jobs.Service,
) *Service {
	return &Service{
		cfg:    cfg,
		db:     db,
		themes: themes,
		sb:     sb,
		jobs:   jobs,
	}
}

func (s *Service) GetSite(ctx context.Context, id int) (models.Site, error) {
	return s.db.GetSite(ctx, int64(id))
}

func (s *Service) GetProdTargetOfSite(ctx context.Context, siteID int) (models.PublishTarget, error) {
	return s.db.GetPublishTargetBySiteRole(ctx, int64(siteID), models.TargetRoleProduction)
}

func (s *Service) SaveSettings(ctx context.Context, site models.Site, newSettings NewSettings) error {
	_, ok := s.themes.Lookup(newSettings.SiteTheme)
	if !ok {
		return errors.New("theme not found")
	}

	newSite := site
	newSite.Title = newSettings.SiteTitle
	newSite.Name = normaliseName(newSite.Title)
	newSite.Theme = newSettings.SiteTheme

	if err := s.db.UpdateSite(ctx, newSite); err != nil {
		return err
	}

	pubTarget, err := s.db.GetPublishTargetBySiteRole(ctx, newSite.ID, models.TargetRoleProduction)
	if err == nil {
		pubTarget.TargetRef = newSettings.TargetRef
		pubTarget.URL = newSettings.TargetURL
		if err := s.db.UpdatePublishTarget(ctx, pubTarget); err != nil {
			return err
		}
	} else if errors.Is(err, pgx.ErrNoRows) {
		pubTarget = models.PublishTarget{
			SiteID:    newSite.ID,
			Role:      models.TargetRoleProduction,
			Type:      models.TargetTypeNetlify,
			URL:       newSettings.TargetURL,
			TargetRef: newSettings.TargetRef,
		}
		if err := s.db.InsertPublishTarget(ctx, &pubTarget); err != nil {
			return err
		}
	} else {
		return err
	}

	return s.jobs.Queue(ctx, s.sb.RebuildSite(site, newSite))
}

type NewSettings struct {
	SiteTitle string `form:"site_title"`
	SiteTheme string `form:"site_theme"`

	TargetURL string `form:"target_url"`
	TargetRef string `form:"target_ref"`
}

func (s *Service) Rebuild(ctx context.Context, site models.Site) error {
	if site.ID == 0 {
		return errors.New("site id required")
	}

	return s.jobs.Queue(ctx, s.sb.RebuildSite(site, site))
}

func (s *Service) Themes() []models.ThemeMeta {
	return s.themes.Themes()
}

func normaliseName(name string) string {
	var sb strings.Builder

	seenDash := false
	for _, r := range strings.TrimSpace(name) {
		if unicode.IsLetter(r) || unicode.IsNumber(r) {
			sb.WriteRune(unicode.ToLower(r))
			seenDash = false
		} else if r == '_' || r == '-' || r == '.' || unicode.IsSpace(r) {
			if !seenDash {
				sb.WriteRune('-')
			}
			seenDash = true
		}
	}
	return sb.String()
}