package main

import (
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
)

func main() {
	s := NewStore()

	// Boot: restore from latest cold snapshot, if any.
	if path := os.Getenv("POSTS_COLD_PATH"); path != "" {
		s.flushPath = path
	}
	if loaded, err := s.RestoreFromLatest(s.flushPath); err != nil {
		log.Fatalf("restore failed: %v", err)
	} else if loaded != "" {
		log.Printf("restored from %s", loaded)
	}

	srv := NewServer(s)

	// SIGTERM handler: cancel the flush context so the flush goroutine runs
	// its final flush before exit. Per Q6 D-cadence.
	go func() {
		sig := make(chan os.Signal, 1)
		signal.Notify(sig, syscall.SIGTERM, syscall.SIGINT)
		<-sig
		log.Printf("shutdown signal received, flushing...")
		ShutdownFlush()
		if err := s.FlushNow(); err != nil {
			log.Printf("final flush error: %v", err)
		}
		os.Exit(0)
	}()

	restAddr := os.Getenv("ADDR")
	if restAddr == "" {
		restAddr = ":8310"
	}
	log.Printf("posts listening on %s (cold=%s)", restAddr, s.flushPath)
	if err := http.ListenAndServe(restAddr, srv.Routes()); err != nil {
		log.Fatal(err)
	}
}