package main

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

const envPrefix = "AETHERA_"

type cliParams struct {
	ListenAddr   string
	ListenPort   int
	DataDir      string
	StaticDir    string
	SettingsFile string
	LLMEndpoint  string
	LLMKey       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 {
	// Require LLM Configuration
	if p.LLMEndpoint == "" {
		return fmt.Errorf("LLM endpoint is required (set AETHERA_LLM_ENDPOINT)")
	}

	// 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)
	}

	// Validate Static Directory
	if p.StaticDir != "" {
		info, err := os.Stat(p.StaticDir)
		if err != nil {
			return fmt.Errorf("failed to access static directory: %w", err)
		}
		if !info.IsDir() {
			return fmt.Errorf("static directory is not a directory: %s", p.StaticDir)
		}
	}

	return nil
}