package storage

import (
	"net/url"
	"strings"
)

// NormalizeObjectKey converts stored avatar/object refs to a stable S3 object key.
// Accepts legacy full URLs, /{bucket}/... paths, or raw keys like avatars/{tenant}/{uid}.png.
func NormalizeObjectKey(bucket, ref string) string {
	ref = strings.TrimSpace(ref)
	if ref == "" || bucket == "" {
		return ref
	}
	bucket = strings.Trim(bucket, "/")
	ref = strings.Trim(ref, "/")

	if strings.Contains(ref, "://") {
		parsed, err := url.Parse(ref)
		if err != nil {
			return ref
		}
		ref = strings.Trim(parsed.Path, "/")
	}

	prefix := bucket + "/"
	if strings.HasPrefix(ref, prefix) {
		return strings.TrimPrefix(ref, prefix)
	}
	if strings.HasPrefix(ref, "/"+prefix) {
		return strings.TrimPrefix(strings.TrimPrefix(ref, "/"), prefix)
	}
	return ref
}

// PublicObjectPath builds a same-origin browser path: /{bucket}/{key}.
func PublicObjectPath(bucket, key string) string {
	bucket = strings.Trim(strings.TrimSpace(bucket), "/")
	key = strings.Trim(strings.TrimSpace(key), "/")
	if bucket == "" || key == "" {
		return ""
	}
	return "/" + bucket + "/" + key
}