package main

import (
	"context"
	_ "embed"
	"flag"
	"log/slog"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/example/glpi-env-controller/internal/app"
)

//go:embed page.html
var pageHTML string

func main() {
	configPath := flag.String("config", "", "path to controller configuration")
	flag.Parse()
	logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{Level: slog.LevelInfo}))
	resolvedConfigPath, err := app.ResolveConfigPath(*configPath, os.Getenv("ENV_CONTROLLER_CONFIG"))
	if err != nil {
		logger.Error("resolve configuration", "error", err)
		os.Exit(1)
	}
	logger.Info("using configuration", "path", resolvedConfigPath)
	cfg, password, err := app.LoadConfig(resolvedConfigPath)
	if err != nil {
		logger.Error("load configuration", "error", err)
		os.Exit(1)
	}
	server, err := app.NewServer(cfg, password, pageHTML, logger)
	if err != nil {
		logger.Error("initialize server", "error", err)
		os.Exit(1)
	}
	ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
	defer cancel()
	server.AutoImport(ctx)
	httpServer := &http.Server{Addr: cfg.ListenAddr, Handler: server.Handler(), ReadHeaderTimeout: 10 * time.Second, ReadTimeout: 30 * time.Second, WriteTimeout: 5 * time.Minute, IdleTimeout: 60 * time.Second, MaxHeaderBytes: 1 << 20}
	go func() {
		<-ctx.Done()
		shutdownCtx, c := context.WithTimeout(context.Background(), 10*time.Second)
		defer c()
		_ = httpServer.Shutdown(shutdownCtx)
	}()
	logger.Info("env controller listening", "addr", cfg.ListenAddr)
	if err := httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
		logger.Error("server stopped", "error", err)
		os.Exit(1)
	}
}