package hold

import (
	"regexp"
	"strings"
)

// matchPattern checks if a handle matches a pattern
// Supports wildcards: "*" (all), "*.domain.com" (suffix), "prefix.*" (prefix), "*.mid.*" (contains)
func matchPattern(pattern, handle string) bool {
	if pattern == "*" {
		// Wildcard matches all
		return true
	}

	// Convert glob to regex and match
	regex := globToRegex(pattern)
	matched, err := regexp.MatchString(regex, handle)
	if err != nil {
		// Log error but fail closed (don't grant access on regex error)
		return false
	}
	return matched
}

// globToRegex converts a glob pattern to a regex pattern
// Examples:
//   - "*.example.com" → "^.*\.example\.com$"
//   - "subdomain.*" → "^subdomain\..*$"
//   - "*.bsky.*" → "^.*\.bsky\..*$"
func globToRegex(pattern string) string {
	// Escape special regex characters (except *)
	escaped := regexp.QuoteMeta(pattern)

	// Replace escaped \* with .*
	regex := strings.ReplaceAll(escaped, "\\*", ".*")

	// Anchor to start and end
	return "^" + regex + "$"
}