package handlers

import (
	"html/template"
	"net/http"

	"git.vbrandl.net/vbrandl/go-web-template/assets"
	"github.com/rs/zerolog/hlog"
)

var indexTemplate *template.Template
var notFoundTemplate *template.Template

type templateData struct {
	RequestID string
}

func (app *Application) ParseTemplates() error {
	t, err := template.ParseFS(assets.Templates, "public/html/index.html", "public/html/navbar.tmpl", "public/html/footer.tmpl")
	if err != nil {
		return err
	}
	indexTemplate = t

	t, err = template.ParseFS(assets.Templates, "public/html/notFound.html", "public/html/navbar.tmpl", "public/html/footer.tmpl")
	if err != nil {
		return err
	}
	notFoundTemplate = t

	return nil
}

func renderTemplate(template template.Template, data map[any]any, additionalHandling http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		l := hlog.FromRequest(r)

		if data == nil {
			data = make(map[any]any)
		}

		reqId := RequestID(r)
		data["RequestID"] = reqId

		if additionalHandling != nil {
			additionalHandling(w, r)
		}

		err := template.Execute(w, data)
		if err != nil {
			l.Error().Err(err).Msg("error rendering template")
			http.Error(w, "Internal Server Error", http.StatusInternalServerError)
		}
	}
}