package unifiedresources

import (
	"crypto/sha256"
	"encoding/hex"
	"fmt"
	"strings"
)

func normalizeSourceID(sourceID string) string {
	return strings.TrimSpace(sourceID)
}

// SourceSpecificID returns the deterministic ID used for non-host resources when the registry
// does not have a canonical identity to key off of.
//
// This matches the ResourceRegistry's internal ID derivation:
// stable := fmt.Sprintf("%s:%s", source, sourceID)
// id := fmt.Sprintf("%s-%s", resourceType, hex(sha256(stable)[:8]))
func SourceSpecificID(resourceType ResourceType, source DataSource, sourceID string) string {
	resourceType = CanonicalResourceType(resourceType)
	stable := fmt.Sprintf("%s:%s", source, normalizeSourceID(sourceID))
	hash := sha256.Sum256([]byte(stable))
	return fmt.Sprintf("%s-%s", resourceType, hex.EncodeToString(hash[:8]))
}

// CanonicalResourceID returns the canonical v6 resource identifier.
func CanonicalResourceID(id string) string {
	trimmed := strings.TrimSpace(id)
	if trimmed == "" {
		return ""
	}
	return trimmed
}