// cthulhu-braille is the isolated BrlAPI helper and standalone diagnostic.
// The main executable starts it only when braille is enabled.
package main

import (
	"context"
	"fmt"
	"os"
	"os/signal"
	"syscall"

	"git.stormux.org/storm/cthulhu/internal/braille"
)

func main() {
	if len(os.Args) > 2 || len(os.Args) == 2 && os.Args[1] != "--client" && os.Args[1] != "--virtual" {
		fmt.Fprintln(os.Stderr, "Usage: cthulhu-braille [--client|--virtual]")
		os.Exit(2)
	}
	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
	defer cancel()
	if len(os.Args) == 2 && os.Args[1] == "--virtual" {
		// Remote export: no display is opened; the parent owns the session.
		if err := braille.RunVirtual(ctx, os.Stdin, os.Stdout); err != nil {
			fmt.Fprintf(os.Stderr, "cthulhu-braille: %v\n", err)
			os.Exit(1)
		}
		return
	}
	if len(os.Args) == 2 {
		if err := braille.RunClient(ctx, braille.NewRouting(), os.Stdin, os.Stdout); err != nil {
			fmt.Fprintf(os.Stderr, "cthulhu-braille: %v\n", err)
			os.Exit(1)
		}
		return
	}
	if err := braille.Diagnostic(ctx, braille.New(), os.Stdout); err != nil {
		fmt.Fprintf(os.Stderr, "cthulhu-braille: %v\n", err)
		os.Exit(1)
	}
}