package main

import (
	"chromagies/src/api"
	"chromagies/src/config"
	"chromagies/src/database"
	"chromagies/src/profiler"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/julienschmidt/httprouter"
)

var router *httprouter.Router
var logFile *os.File

func main() {
	startTime := time.Now()
	log.SetOutput(os.Stdout)
	log.Println("============================================================")
	log.Println("Starting server...")

	go handleStopSignal()

	initConfig()
	startLogger()

	database.Init()
	initRouter()
	var conf config.Server = (config.GetConfig()).Server

	var readyTime time.Duration = time.Duration(time.Since(startTime).Microseconds())
	profiler.Register("Startup", 1, "µs")
	profiler.Add("Startup", readyTime)
	log.Printf("Server ready in %d microseconds\n", readyTime)

	http.ListenAndServe(fmt.Sprintf("%s:%d", conf.IP, conf.Port), router)
	stopServer()
}

func startLogger() {
	var conf config.Logger = (config.GetConfig()).Logger
	if conf.Output != "" {
		var err error
		logFile, err = os.OpenFile(conf.Output, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0666)
		if err != nil {
			log.Printf("Output file \"%s\" un-openable : %s", conf.Output, err)
			return
		}
		log.Printf("Switching logs to output file \"%s\"\nStopping to log in the console", conf.Output)
		log.SetOutput(logFile)
		log.Println("============================================================")
		log.Printf("Hi there ! Server is starting...")
	}

}

func initConfig() {
	var err error
	err = config.ReadConfigFile()

	if err != nil {
		err = config.CreateConfigFile()

		if err == nil {
			err = config.ReadConfigFile()
		}
	}

	if err != nil {
		log.Fatalln("Cannot read/write config file !")
	}
}

func initRouter() {
	router = httprouter.New()

	// routeur.NotFoundHandler = TODO

	api.Init(router)

	router.ServeFiles("/static/*filepath", http.Dir("./static/"))
}

func handleStopSignal() {
	sigs := make(chan os.Signal, 1)
	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
	<-sigs
	close(sigs)
	fmt.Println()
	stopServer()
}

func stopServer() {
	log.Println("Stopping server...")

	// Close everything

	if logFile != nil {
		log.Println("Closing log file, giving back log output to console")
		logFile.Close()
		log.SetOutput(os.Stdout)
	}
	log.Println("Server stopped")
	os.Exit(0)
}