package utils

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

func ExpandPath(path string) (string, error) {
	expanded := os.ExpandEnv(path)
	expanded = filepath.Clean(expanded)

	if strings.HasPrefix(expanded, "~") {
		home, err := os.UserHomeDir()
		if err != nil {
			return "", err
		}
		expanded = filepath.Join(home, expanded[1:])
	}

	return expanded, nil
}

func XDGConfigHome() string {
	if configHome := os.Getenv("XDG_CONFIG_HOME"); configHome != "" {
		return configHome
	}
	if home, err := os.UserHomeDir(); err == nil {
		return filepath.Join(home, ".config")
	}
	return filepath.Join(os.TempDir(), ".config")
}

func XDGCacheHome() string {
	if cacheHome := os.Getenv("XDG_CACHE_HOME"); cacheHome != "" {
		return cacheHome
	}
	if home, err := os.UserHomeDir(); err == nil {
		return filepath.Join(home, ".cache")
	}
	return filepath.Join(os.TempDir(), ".cache")
}

func XDGDataHome() string {
	if dataHome := os.Getenv("XDG_DATA_HOME"); dataHome != "" {
		return dataHome
	}
	if home, err := os.UserHomeDir(); err == nil {
		return filepath.Join(home, ".local", "share")
	}
	return filepath.Join(os.TempDir(), ".local", "share")
}