/*
------------------------------------------------------------------------------------------------------------------------
####### main ####### Copyright (c) 2021 mls-361 #################################################### MIT License #######
------------------------------------------------------------------------------------------------------------------------
*/

package main

import (
	"math/rand"
	"os"
	"os/signal"
	"sync"
	"syscall"
	"time"

	"forge.chapril.org/mls-361/application"
	"forge.chapril.org/mls-361/errors"

	"forge.chapril.org/armen/armen/internal/api"
	"forge.chapril.org/armen/armen/internal/cmdline"
	"forge.chapril.org/armen/armen/internal/components"
	"forge.chapril.org/armen/armen/internal/config"
	"forge.chapril.org/armen/armen/internal/crypto"
	"forge.chapril.org/armen/armen/internal/demo"
	"forge.chapril.org/armen/armen/internal/gui"
	"forge.chapril.org/armen/armen/internal/logger"
	"forge.chapril.org/armen/armen/internal/model"
	"forge.chapril.org/armen/armen/internal/router"
	"forge.chapril.org/armen/armen/internal/server"
	"forge.chapril.org/armen/armen/internal/storage"
)

var (
	_version string
	_builtAt string
)

func init() {
	rand.Seed(time.Now().UnixNano())
}

func buildComponents(ccs *components.Components) error {
	var err error

	ccs.Config, err = config.Load(ccs)
	if err != nil {
		return errors.WithMessage(err, "config") ///////////////////////////////////////////////////////////////////////
	}

	ccs.Logger, err = logger.Build(ccs)
	if err != nil {
		return errors.WithMessage(err, "logger") ///////////////////////////////////////////////////////////////////////
	}

	ccs.Crypto, err = crypto.Build(ccs)
	if err != nil {
		return errors.WithMessage(err, "crypto") ///////////////////////////////////////////////////////////////////////
	}

	ccs.Storage, err = storage.Build(ccs)
	if err != nil {
		return errors.WithMessage(err, "storage") //////////////////////////////////////////////////////////////////////
	}

	ccs.Model, err = model.Build(ccs)
	if err != nil {
		return errors.WithMessage(err, "model") ////////////////////////////////////////////////////////////////////////
	}

	ccs.Router = router.Build(ccs)

	ccs.Server, err = server.Build(ccs)
	if err != nil {
		return errors.WithMessage(err, "server") ///////////////////////////////////////////////////////////////////////
	}

	if err = demo.Build(ccs); err != nil {
		return errors.WithMessage(err, "demo") /////////////////////////////////////////////////////////////////////////
	}

	api.Build(ccs)
	gui.Build(ccs)

	return nil
}

func waitEnd(server components.Server) (*sync.WaitGroup, chan struct{}) {
	endCh := make(chan struct{})
	group := new(sync.WaitGroup)

	group.Add(1)

	go func() { //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
		defer group.Done()
		defer server.Stop()

		sigCh := make(chan os.Signal, 1)
		defer close(sigCh)

		signal.Notify(sigCh, os.Interrupt, syscall.SIGABRT, syscall.SIGQUIT, syscall.SIGTERM)

		select {
		case <-sigCh:
		case <-endCh:
		}
	}()

	return group, endCh
}

func run() error {
	app := application.New("armen", _version, _builtAt)
	if err := app.Initialize(); err != nil {
		return app.OnError(err)
	}

	if end, err := cmdline.Parse(app); end || err != nil {
		return app.OnError(err)
	}

	ccs := components.New(app)

	defer ccs.Shutdown()

	if err := buildComponents(ccs); err != nil {
		if ccs.Logger != nil {
			ccs.Logger.Fatal( //::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
				"Components build error",
				"reason", err,
			)
		}

		return app.OnError(err)
	}

	group, endCh := waitEnd(ccs.Server)

	ccs.Startup()
	demo.Start()

	err := ccs.Server.Start()

	close(endCh)

	demo.Stop()

	group.Wait()

	return app.OnError(err)
}

func main() {
	if run() != nil {
		os.Exit(1)
	}
}

/*
######################################################################################################## @(°_°)@ #######
*/