package utils

import (
	"os"
	"path/filepath"
	// "strings"
)

func ExpandGlob(patterns []string) ([]string, error) {
	var result []string

	for _, pattern := range patterns {

		if pattern == "*" {
			files, err := filepath.Glob("**") // fallback
			if err != nil {
				return nil, err
			}
			result = append(result, files...)
			continue
		}

		matches, err := filepath.Glob(pattern)
		if err != nil {
			return nil, err
		}

		for _, m := range matches {
			info, err := os.Stat(m)
			if err != nil || info.IsDir() {
				continue
			}
			result = append(result, m)
		}
	}

	return result, nil
}

func add(path string, seen map[string]struct{}, result *[]string) {
	if _, ok := seen[path]; ok {
		return
	}
	seen[path] = struct{}{}
	*result = append(*result, path)
}