package root

import (
	"embed"
	"html/template"
	"io/fs"
	"log"
	"path/filepath"
)

//go:embed templates static/*
var webAssetsFS embed.FS

var WebTemplates *template.Template

// InitializeWebTemplates parses all HTML templates in the embedded filesystem
func InitializeWebTemplates() error {
	var err error
	WebTemplates, err = parseWebTemplates()
	return err
}

func parseWebTemplates() (*template.Template, error) {
	tmpl := template.New("")

	err := fs.WalkDir(webAssetsFS, "templates", func(path string, d fs.DirEntry, err error) error {
		if err != nil {
			return err
		}

		if d.IsDir() {
			return nil
		}

		if filepath.Ext(path) != ".html" {
			return nil
		}

		log.Printf("Parsing template: %s", path)

		content, err := webAssetsFS.ReadFile(path)
		if err != nil {
			return err
		}

		_, err = tmpl.New(filepath.Base(path)).Parse(string(content))
		return err
	})

	if err != nil {
		return nil, err
	}

	return tmpl, nil
}

// GetStaticFS provides access to the static assets filesystem for serving CSS and other static files
func GetStaticFS() (fs.FS, error) {
	return fs.Sub(webAssetsFS, "static")
}