package main

import (
	"embed"
	"html/template"
	"log"
	"net/http"
)

//go:embed static
var staticFiles embed.FS

type Guestbook struct {
	Comments []string
	Count    int
}

func indexHandler(writer http.ResponseWriter, request *http.Request) {
	html, err := template.ParseFS(staticFiles, "static/index.html")
	check(err)

	store := TxtStore("comments.txt")
	guestbook, err := store.GetGuestbook()
	check(err)

	err = html.Execute(writer, guestbook)
	check(err)
}

func newHandler(writer http.ResponseWriter, request *http.Request) {
	comment := request.FormValue("comment")
	store := TxtStore("comments.txt")

	err := store.AddComment(comment)
	check(err)

	http.Redirect(writer, request, "/", http.StatusFound)
}

func main() {
	http.HandleFunc("/", indexHandler)
	http.HandleFunc("/new", newHandler)

	var staticFS = http.FS(staticFiles)
	http.Handle("/static/", http.FileServer(staticFS))

	err := http.ListenAndServe("0.0.0.0:80", nil)
	log.Fatal(err)
}

func check(err error) {
	if err != nil {
		log.Fatal(err)
	}
}