package spaserver

import (
	"os"
	"strconv"
)

// Config holds the server configuration.
// All fields are populated from environment variables by [DefaultConfig].
type Config struct {
	// Port is the TCP port the server listens on.
	Port int `env:"EINHERJAR_SPA_PORT" envDefault:"8080"`
	// StaticDir is the filesystem path that contains index.html and all assets.
	StaticDir string `env:"EINHERJAR_SPA_STATIC_DIR" envDefault:"/srv/www"`
}

// DefaultConfig returns a Config populated from environment variables,
// falling back to safe defaults when variables are unset.
func DefaultConfig() Config {
	port := 8080
	if v := os.Getenv("EINHERJAR_SPA_PORT"); v != "" {
		if p, err := strconv.Atoi(v); err == nil && p > 0 {
			port = p
		}
	}

	staticDir := "/srv/www"
	if v := os.Getenv("EINHERJAR_SPA_STATIC_DIR"); v != "" {
		staticDir = v
	}

	return Config{
		Port:      port,
		StaticDir: staticDir,
	}
}