package main

import (
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"forgejo.riotpiao.com/rock/homelab-frontend/internal/config"
	"forgejo.riotpiao.com/rock/homelab-frontend/internal/proxy"
	"forgejo.riotpiao.com/rock/homelab-frontend/internal/server"
	"forgejo.riotpiao.com/rock/homelab-frontend/internal/serviceadapter"
	"forgejo.riotpiao.com/rock/homelab-frontend/internal/temporal"
)

func main() {
	cfg, err := config.Load()
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to load config: %v\n", err)
		os.Exit(1)
	}

	authEnabled := false
	for _, route := range cfg.Routes {
		if route.Upstream.AuthRequired {
			authEnabled = true
			break
		}
	}

	upstreamHandler := proxy.New(cfg)

	temporalHostPort := os.Getenv("TEMPORAL_HOST_PORT")
	if temporalHostPort == "" {
		temporalHostPort = "localhost:7233"
	}
	log.Printf("Temporal server: %s", temporalHostPort)
	temporalHandler := temporal.NewHandler(temporalHostPort)

	srv := server.New(cfg.ListenAddr, cfg.ShutdownTimeout, nil)
	healthChecker := server.NewHealthChecker(true, authEnabled)
	srv.SetHealthChecker(healthChecker)

	// ServiceAdapter: registry + loader + dispatcher
	registry := serviceadapter.NewRegistry(nil)
	dispatcher := serviceadapter.NewDispatcher(registry)

	var loader *serviceadapter.Loader
	if l, err := serviceadapter.NewLoader(registry, "api"); err != nil {
		log.Printf("ServiceAdapter loader disabled: %v", err)
	} else {
		l.Start(30 * time.Second)
		loader = l
		log.Printf("ServiceAdapter loader started (background)")
	}

	router := server.NewRouter(healthChecker, dispatcher, temporalHandler, upstreamHandler)
	srv.SetHandler(router)

	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, syscall.SIGTERM, syscall.SIGINT)

	go func() {
		log.Printf("gateway listening on %s", srv.Addr())
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Printf("server error: %v", err)
		}
	}()

	sig := <-sigChan
	log.Printf("received signal: %v", sig)

	if loader != nil {
		loader.Stop()
	}

	if err := srv.Shutdown(nil); err != nil {
		fmt.Fprintf(os.Stderr, "shutdown error: %v\n", err)
		os.Exit(1)
	}

	log.Printf("gateway shutdown complete")
}