package cmd

import (
	"flag"
	"net/http"
	"os"
	"os/signal"
	"syscall"

	"github.com/julienschmidt/httprouter"

	"git.espin.casa/albert/logger"
	"git.espin.casa/albert/mercadona/internal/client"
	"git.espin.casa/albert/mercadona/internal/routes"
)

func Run() error {
	// setup flags
	apiAddr := flag.String("api-addr", "localhost:3000", "REST API server address")
	logLevel := flag.String("level", "debug", "Log level")
	flag.Parse()
	// logfields
	logFields := logger.LogFields{}

	// setup logger
	log := logger.New(os.Stdout, *logLevel)
	// create router
	router := httprouter.New()
	client := client.NewClient()
	routes.CreateRoutes(router, client)
	// start http server
	go func() {
		http.ListenAndServe(*apiAddr, router)
	}()
	// info banner
	log.Info("started Mercadona api service", logFields)
	// wait signal to finish
	signal := WaitSignal()
	log.Info("signal received", logFields.Add(logger.LogFields{
		"signal": signal,
	}))
	return nil
}

// WaitSignal catching exit signal
func WaitSignal() os.Signal {
	ch := make(chan os.Signal, 2)
	signal.Notify(
		ch,
		syscall.SIGINT,
		syscall.SIGQUIT,
		syscall.SIGTERM,
	)
	for {
		sig := <-ch
		switch sig {
		case syscall.SIGINT, syscall.SIGQUIT, syscall.SIGTERM:
			return sig
		}
	}
}