package main

import (
	"fmt"
	"os/signal"
	"syscall"
	"time"

	"FRMS/internal/pkg/config"
	"FRMS/internal/pkg/logging"
	"FRMS/internal/pkg/server"
	"os"

	"github.com/spf13/viper"
)

type coordinator interface {
	Start()
}

func NewCoordinator(config *viper.Viper, ch chan error) coordinator {
	return server.NewCentralCoordinator(config, ch)
}

func LoadConfig(file, path, ext string) (*viper.Viper, error) {
	return config.LoadConfig(file, path, ext)
}

func main() {

	fmt.Printf("starting server... ")
	start := time.Now()

	gracefulShutdown := make(chan os.Signal, 1)
	signal.Notify(gracefulShutdown, syscall.SIGINT, syscall.SIGTERM)

	userHome, err := os.UserHomeDir()

	if err != nil {
		panic(err)
	}

	configPath := fmt.Sprintf("%s/.config/FRMS", userHome)
	configFile := "server"
	configExt := "yaml"
	conf, err := LoadConfig(configFile, configPath, configExt)
	if err != nil {
		panic(err)
	}

	errCh := make(chan error)

	c := NewCoordinator(conf, errCh)
	go c.Start()
	logging.Debug(logging.DStart, "CCO 01 %s started", conf.Get("name"))

	elapsed := time.Now().Sub(start)
	fmt.Printf("done %v\n", elapsed.Round(time.Microsecond))

	select {
	case err := <-errCh:
		panic(err)
	case <-gracefulShutdown:
		fmt.Printf("\nstopping server... ")
		start := time.Now()
		if err := conf.WriteConfig(); err != nil {
			panic(err)
		}
		logging.Debug(logging.DExit, "CON wrote %s", conf.ConfigFileUsed())
		elapsed := time.Now().Sub(start)
		fmt.Printf("done %v\n", elapsed.Round(time.Microsecond))
		os.Exit(0)
	}
}