package utils
import (
	"fmt"
	"strconv"
	"strings"
)
// ParseLocation parses a "lat,lng[,timezone]" string into its components.
// Timezone is optional and defaults to "" (UTC).
func ParseLocation(location string) (lat, lng float64, timezone string, err error) {
	parts := strings.Split(location, ",")
	if len(parts) < 2 || len(parts) > 3 {
		return 0, 0, "", fmt.Errorf("--location must be \"lat,lng\" or \"lat,lng,timezone\" (got %d parts)", len(parts))
	}
	lat, err = strconv.ParseFloat(strings.TrimSpace(parts[0]), 64)
	if err != nil {
		return 0, 0, "", fmt.Errorf("--location: invalid latitude: %s", parts[0])
	}
	lng, err = strconv.ParseFloat(strings.TrimSpace(parts[1]), 64)
	if err != nil {
		return 0, 0, "", fmt.Errorf("--location: invalid longitude: %s", parts[1])
	}
	if len(parts) == 3 {
		timezone = strings.TrimSpace(parts[2])
	}
	return lat, lng, timezone, nil
}