package main

import (
	"context"
	"log/slog"
	"net/http"
	"os"
	"os/signal"
	"strings"

	"git.t-juice.club/torjus/alerttonotify/server"
)

const Version = "v0.1.1"

func main() {
	// Setup logging
	logger := slog.New(slog.NewJSONHandler(os.Stderr, &slog.HandlerOptions{
		Level: slog.LevelDebug,
	}))
	logger.Info("Starting alerttonotify", "version", Version)

	// Setup nats connection
	natsURL, ok := os.LookupEnv("NATS_URL")
	if !ok {
		logger.Error("NATS_URL not set")
		os.Exit(1)
	}
	nkey, ok := os.LookupEnv("NATS_NKEY")
	if !ok {
		path, ok := os.LookupEnv("NATS_NKEY_FILE")
		if !ok {
			logger.Error("NATS_NKEY and NATS_NKEY_FILE not set")
			os.Exit(1)
		}

		data, err := os.ReadFile(path)
		if err != nil {
			logger.Error("unable to read NATS_NKEY_FILE", "error", err)
			os.Exit(1)
		}
		nkey = strings.TrimSpace(string(data))
	}

	ns, err := server.NewNotificationService(natsURL, nkey)
	if err != nil {
		logger.Error("Failed to create notification service", "error", err)
		os.Exit(1)
	}

	shutdownCtx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
	defer cancel()

	// Setup http server
	srv := server.NewServer(ns, logger)
	srv.Addr = ":5001"

	addr, ok := os.LookupEnv("ALERTTONOTIFY_ADDR")
	if ok {
		srv.Addr = addr
	}

	// Listen for shutdown signal
	go func() {
		<-shutdownCtx.Done()
		srv.Close()
		srv.Shutdown(context.Background())
	}()

	logger.Info("Starting http server", "addr", srv.Addr)
	if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
		logger.Error("Failed to start http server", "error", err)
		os.Exit(1)
	}
	logger.Info("Shutting down")
}