package main

import (
	"fmt"
	"os"
	"path"
	"strconv"
)

const envPrefix = "AETHERA_"

type cliParams struct {
	ListenAddr   string
	ListenPort   int
	DataDir      string
	SettingsFile string
}

// getEnvOrDefault returns the value of an environment variable or a default value
func getEnvOrDefault(key, defaultValue string) string {
	if value := os.Getenv(envPrefix + key); value != "" {
		return value
	}
	return defaultValue
}

// getEnvIntOrDefault returns the integer value of an environment variable or a default value
func getEnvIntOrDefault(key string, defaultValue int) int {
	if value := os.Getenv(envPrefix + key); value != "" {
		if intVal, err := strconv.Atoi(value); err == nil {
			return intVal
		}
	}
	return defaultValue
}

func (p *cliParams) Validate() error {
	// Ensure Generated Directories
	imgDir := path.Join(p.DataDir, "generated/images")
	if err := os.MkdirAll(imgDir, 0755); err != nil {
		return fmt.Errorf("failed to create images directory: %w", err)
	}

	return nil
}