package utils

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

// MainSite returns homepage address depending on network used.
func MainSite(host string) string {
	if strings.Contains(host, "i2p") {
		return "http://arav.i2p"
	} else if strings.Contains(host, "onion") {
		return "http://moq7aejnf4xk5k2bkaltli3ftkhusy2mbrd3pj23nrca343ku2mgk4yd.onion"
	} else if strings.HasPrefix(host, "[300") {
		return "http://[300:a98d:d6d0:8a08::f]"
	}

	return "https://arav.top"
}

// ToClientTimezone converts given time to timezone set in a
// X-Client-Timezone header. If this header is not set, then
// converts to UTC.
func ToClientTimezone(t time.Time, r *http.Request) time.Time {
	if tz := r.Header.Get("X-Client-Timezone"); tz != "" {
		loc, err := time.LoadLocation(tz)
		if err != nil {
			return t.UTC()
		}
		return t.In(loc)
	}

	return t.UTC()
}