package sitebuilder

import (
	"context"
	"errors"
	"gopkg.in/yaml.v3"
	"lmika.dev/lmika/hugo-crm/models"
	"lmika.dev/lmika/hugo-crm/providers/git"
	"lmika.dev/lmika/hugo-crm/providers/hugo"
	"lmika.dev/lmika/hugo-crm/providers/themes"
	"log"
	"os"
	"path/filepath"
	"time"
)

type Service struct {
	themes *themes.Provider
	git    *git.Provider
	hugo   *hugo.Provider
}

func New(
	themes *themes.Provider,
	git *git.Provider,
	hugo *hugo.Provider,
) *Service {
	return &Service{
		themes: themes,
		git:    git,
		hugo:   hugo,
	}
}

func (s *Service) CreateNewSite(site models.Site) models.Job {
	return models.Job{
		Do: func(ctx context.Context) error {
			themeMeta, ok := s.themes.Lookup(site.Theme)
			if !ok {
				return errors.New("theme not found")
			}

			// Build the site
			log.Printf(" .. build")
			if err := s.hugo.NewSite(ctx, site); err != nil {
				return err
			}

			// Setup the theme
			log.Printf(" .. theme")
			if err := s.git.Clone(ctx, themeMeta.URL, s.hugo.SiteStagingDir(site, hugo.ThemeSiteDir)); err != nil {
				return err
			}

			if err := s.hugo.ReconfigureSite(ctx, site); err != nil {
				return err
			}
			return nil
		},
	}
}

func (s *Service) WritePost(site models.Site, post models.Post) models.Job {
	return models.Job{
		Do: func(ctx context.Context) error {
			themeMeta, ok := s.themes.Lookup(site.Theme)
			if !ok {
				return errors.New("theme not found")
			}

			postFilename := filepath.Join(s.hugo.SiteStagingDir(site, hugo.ContentSiteDir), themeMeta.PostDir, post.CreatedAt.Format("2006-01-02-150405.md"))

			log.Printf(" .. post %v", postFilename)

			if err := os.MkdirAll(filepath.Dir(postFilename), 0755); err != nil {
				return err
			}

			frontMatter := map[string]string{
				"date": post.PostDate.Format(time.RFC3339),
			}
			if post.Title != "" {
				frontMatter["title"] = post.Title
			} else if themeMeta.PreferTitle {
				frontMatter["title"] = post.PostDate.Format(time.ANSIC)
			}

			fmBytes, err := yaml.Marshal(frontMatter)
			if err != nil {
				return err
			}

			f, err := os.Create(postFilename)
			if err != nil {
				return err
			}
			defer f.Close()

			if _, err := f.WriteString("---\n"); err != nil {
				return err
			}
			if _, err := f.Write(fmBytes); err != nil {
				return err
			}
			if _, err := f.WriteString("---\n"); err != nil {
				return err
			}
			if _, err := f.WriteString(post.Body); err != nil {
				return err
			}

			return nil
		},
	}
}