package gate

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

//go:embed login.html
var loginHTML string

var loginTmpl = template.Must(template.New("login").Parse(loginHTML))

const (
	msgWrong   = "That password is not right."
	msgTooMany = "Too many attempts. Try again in a minute."
)

type pageData struct {
	Host   string
	Error  string
	Next   string
	Action string
}

// writePage renders the login page at status. Every page this package
// writes is no-store and noindex: it is a curtain, not content.
func writePage(w http.ResponseWriter, r *http.Request, host string, status int, msg, next string) {
	h := w.Header()
	h.Set("Cache-Control", "no-store")
	h.Set("X-Robots-Tag", "noindex, nofollow")
	h.Set("Content-Type", "text/html; charset=utf-8")
	w.WriteHeader(status)
	if r.Method == http.MethodHead {
		return
	}
	if err := loginTmpl.Execute(w, pageData{Host: host, Error: msg, Next: next, Action: LoginPath}); err != nil {
		log.Printf("gate: render login page for %s: %v", host, err)
	}
}