// Package lemcmd provides CLI commands for the LEM binary.
// Commands register through the Core framework's cli.WithCommands lifecycle.
package lemcmd

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

	"forge.lthn.ai/core/cli/pkg/cli"
)

// AddLEMCommands registers all LEM command groups on the root command.
func AddLEMCommands(root *cli.Command) {
	addScoreCommands(root)
	addGenCommands(root)
	addDataCommands(root)
	addExportCommands(root)
	addMonCommands(root)
	addInfraCommands(root)
}

// envOr returns the environment variable value, or the fallback if not set.
func envOr(key, fallback string) string {
	if v := os.Getenv(key); v != "" {
		return v
	}
	return fallback
}

// intEnvOr returns the environment variable value parsed as int, or the fallback.
func intEnvOr(key string, fallback int) int {
	v := os.Getenv(key)
	if v == "" {
		return fallback
	}
	var n int
	fmt.Sscanf(v, "%d", &n)
	if n == 0 {
		return fallback
	}
	return n
}

// expandHome expands a leading ~/ to the user's home directory.
func expandHome(path string) string {
	if strings.HasPrefix(path, "~/") {
		home, err := os.UserHomeDir()
		if err == nil {
			return filepath.Join(home, path[2:])
		}
	}
	return path
}