// Command groundstation-display renders the Ground Station kiosk canvas. It
// owns its display lifecycle independently of WFB, the transmitter and the
// video launcher: it waits for its target to appear, redraws as needed, and
// stops only when it receives SIGINT or SIGTERM.
package main

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

	"git.piksar.eu/piotr/groundstation/internal/display"
)

// buildTarget selects the target-specific opener and template. Each target
// owns its own backend and layouts; there is no shared global template.
func buildTarget(name string) (display.Opener, display.Template, error) {
	switch name {
	case "x11":
		return display.X11Opener{}, display.NewStatusTemplate("Brak polaczenia WFB"), nil
	default:
		return nil, nil, fmt.Errorf("unknown display target %q (supported: x11)", name)
	}
}

func main() {
	target := flag.String("target", "x11", "display target: x11 (Viture) today; mipi planned")
	flag.Parse()

	opener, template, err := buildTarget(*target)
	if err != nil {
		log.Fatal(err)
	}

	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
	defer stop()

	// Temporary X11 unavailability never exits this process; display.Run
	// keeps retrying internally until the context is cancelled.
	if err := display.Run(ctx, opener, template, display.Options{}); err != nil {
		log.Fatalf("display: %v", err)
	}
}