package config

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

const (
	Version                    = "1.0.0"
	DefaultAddr                = "0.0.0.0:5032"
	MutexName                  = "LocalManagementAgent_Mutex"
	RequestBodyMax             = 1 << 20
	MaxListEntries             = 10000
	MaxImageQuality            = 100
	DefaultExecTO              = 30
	MaxExecTO                  = 120
	StartupValueName           = "LocalManagementAgent"
	StartupRunKey              = `Software\Microsoft\Windows\CurrentVersion\Run`
	MaxInputText               = 4096
	AppDataDir                 = "LocalManagementAgent"
	KeylogSubdir               = "keystrokes"
	DefaultKeylogRetentionDays = 7
)

func EnvOr(name, fallback string) string {
	if value := strings.TrimSpace(os.Getenv(name)); value != "" {
		return value
	}
	return fallback
}

func KeylogEnabled() bool {
	switch strings.ToLower(strings.TrimSpace(os.Getenv("KEYLOG_ENABLED"))) {
	case "0", "false", "no", "off":
		return false
	default:
		return true
	}
}

func KeylogRetentionDays() int {
	raw := strings.TrimSpace(os.Getenv("KEYLOG_RETENTION_DAYS"))
	if raw == "" {
		return DefaultKeylogRetentionDays
	}
	days, err := strconv.Atoi(raw)
	if err != nil || days < 0 {
		return DefaultKeylogRetentionDays
	}
	return days
}

func KeylogDir() (string, error) {
	base, err := os.UserConfigDir()
	if err != nil {
		return "", err
	}
	return filepath.Join(base, AppDataDir, KeylogSubdir), nil
}