// FILE: internal/normalizers/common/id.go
package common

import "fmt"

// SynthStationID formats a stable synthetic station identifier for providers that are
// coordinate-based rather than station-based.
//
// Example output:
//
//	OPENMETEO(38.62700,-90.19940)
func SynthStationID(prefix string, lat, lon float64) string {
	return fmt.Sprintf("%s(%.5f,%.5f)", prefix, lat, lon)
}

// SynthStationIDPtr is the pointer-friendly variant.
// If either coordinate is missing, it returns "" (unknown).
func SynthStationIDPtr(prefix string, lat, lon *float64) string {
	if lat == nil || lon == nil {
		return ""
	}
	return SynthStationID(prefix, *lat, *lon)
}