package handlers

import (
	"net"
	"net/http"
	"strconv"
	"strings"
	"time"
)

const contactSeenCookie = "tk_contact_seen"

func clientIP(r *http.Request) string {
	if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
		if i := strings.Index(xff, ","); i >= 0 {
			xff = xff[:i]
		}
		if ip := strings.TrimSpace(xff); ip != "" {
			return ip
		}
	}
	host, _, err := net.SplitHostPort(r.RemoteAddr)
	if err != nil {
		return r.RemoteAddr
	}
	return host
}

func setContactFormSeen(w http.ResponseWriter) {
	http.SetCookie(w, &http.Cookie{
		Name:     contactSeenCookie,
		Value:    strconv.FormatInt(time.Now().Unix(), 10),
		Path:     "/",
		HttpOnly: true,
		SameSite: http.SameSiteLaxMode,
		MaxAge:   int((10 * time.Minute).Seconds()),
	})
}

func contactFormSeenUnix(r *http.Request) int64 {
	c, err := r.Cookie(contactSeenCookie)
	if err != nil {
		return 0
	}
	v, err := strconv.ParseInt(c.Value, 10, 64)
	if err != nil {
		return 0
	}
	return v
}