// Command server runs the PilotVault API Server. It is the single entry point
// the Fly App (drone/telemetry uplink) and the Web App / API Web Panel talk to.
// It keeps live device state in memory, fans telemetry out to dashboards over a
// websocket, and proxies authentication to a PocketBase kept behind it.
package main

import (
	"context"
	"errors"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"pilotvault/apiserver/internal/api"
	"pilotvault/apiserver/internal/config"
	"pilotvault/apiserver/internal/hub"
)

func main() {
	log.SetFlags(log.LstdFlags | log.Lmsgprefix)
	log.SetPrefix("[api] ")

	cfg := config.Load()

	h := hub.New()
	srv := api.New(cfg, h)

	if err := srv.StartPlugins(); err != nil {
		log.Printf("plugins: load failed: %v", err)
	}

	httpServer := &http.Server{
		Addr:              cfg.Addr,
		Handler:           srv.Handler(),
		ReadHeaderTimeout: 10 * time.Second,
		// No WriteTimeout: /ws/* are long-lived streaming connections.
		IdleTimeout: 60 * time.Second,
	}

	go func() {
		log.Printf("listening on %s (PocketBase: %s, panel at /)", cfg.Addr, cfg.PocketBaseURL)
		if err := httpServer.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
			log.Fatalf("server error: %v", err)
		}
	}()

	// Graceful shutdown.
	stop := make(chan os.Signal, 1)
	signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
	<-stop
	log.Println("shutting down...")

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	srv.Stop(ctx)
	if err := httpServer.Shutdown(ctx); err != nil {
		log.Printf("shutdown error: %v", err)
	}
	log.Println("stopped")
}