package main

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

func main() {
	config, err := LoadConfig()
	if err != nil {
		log.Fatalf("configuration: %v", err)
	}
	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
	defer stop()
	store, err := OpenStore(ctx, config.DatabaseURL)
	if err != nil {
		log.Fatalf("database: %v", err)
	}
	defer store.Close()
	if err = store.Bootstrap(ctx, config); err != nil {
		log.Fatalf("bootstrap: %v", err)
	}
	agent := NewAgentClient(config.CredentialsDir)
	app, err := NewApp(store, agent, config)
	if err != nil {
		log.Fatalf("application: %v", err)
	}
	server := &http.Server{
		Addr: config.ListenAddress, Handler: app,
		ReadHeaderTimeout: 5 * time.Second, ReadTimeout: 10 * time.Second,
		WriteTimeout: 15 * time.Second, IdleTimeout: 60 * time.Second,
		MaxHeaderBytes: 16 << 10,
	}
	poller := &Poller{store: store, agent: agent, metricRetention: config.MetricsRetention, logRetention: config.LogsRetention}
	go poller.Run(ctx)
	go func() {
		<-ctx.Done()
		shutdownCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
		defer cancel()
		_ = server.Shutdown(shutdownCtx)
	}()
	log.Printf("control-plane API listening on %s", config.ListenAddress)
	if err = server.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
		log.Fatalf("HTTP server: %v", err)
	}
}