package sslh

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

	"sslh-multiplex-lab/internal/services"
)

func GenerateConfigFile(services []services.Service, serverIP, domain, outputPath string) error {
	config, err := GenerateConfig(services, serverIP, domain)
	if err != nil {
		return fmt.Errorf("failed to generate config: %w", err)
	}

	configContent := config.ToLibConfig()

	if err := os.MkdirAll(filepath.Dir(outputPath), 0755); err != nil {
		return fmt.Errorf("failed to create config directory: %w", err)
	}

	if err := os.WriteFile(outputPath, []byte(configContent), 0644); err != nil {
		return fmt.Errorf("failed to write config file: %w", err)
	}

	return nil
}

func ValidateConfig(config *Config) error {
	if len(config.Listen) == 0 {
		return fmt.Errorf("at least one listen address is required")
	}

	if len(config.Protocols) == 0 {
		return fmt.Errorf("at least one protocol route is required")
	}

	return nil
}