package main

import (
	"context"
	"flag"
	"fmt"
	"os"
	"os/signal"
	"path"
	"syscall"

	"git.defalsify.org/vise.git/engine"
	"git.defalsify.org/vise.git/logging"
	"git.defalsify.org/vise.git/resource"
	"git.defalsify.org/vise.git/lang"

	"git.grassecon.net/urdt/ussd/config"
	"git.grassecon.net/urdt/ussd/initializers"
	"git.grassecon.net/urdt/ussd/internal/handlers"
	"git.grassecon.net/urdt/ussd/internal/storage"
	"git.grassecon.net/urdt/ussd/remote"
	"git.grassecon.net/urdt/ussd/internal/args"
)

var (
	logg          = logging.NewVanilla()
	scriptDir     = path.Join("services", "registration")
	menuSeparator = ": "
)

func init() {
	initializers.LoadEnvVariables()
}

type asyncRequestParser struct {
	sessionId string
	input     []byte
}

func (p *asyncRequestParser) GetSessionId(ctx context.Context, r any) (string, error) {
	return p.sessionId, nil
}

func (p *asyncRequestParser) GetInput(r any) ([]byte, error) {
	return p.input, nil
}

func main() {
	config.LoadConfig()

	var sessionId string
	var dbDir string
	var resourceDir string
	var size uint
	var database string
	var engineDebug bool
	var host string
	var port uint
	var gettextDir string
	var langs args.LangVar
	flag.StringVar(&sessionId, "session-id", "075xx2123", "session id")
	flag.StringVar(&dbDir, "dbdir", ".state", "database dir to read from")
	flag.StringVar(&resourceDir, "resourcedir", path.Join("services", "registration"), "resource dir")
	flag.StringVar(&database, "db", "gdbm", "database to be used")
	flag.BoolVar(&engineDebug, "d", false, "use engine debug output")
	flag.UintVar(&size, "s", 160, "max size of output")
	flag.StringVar(&host, "h", initializers.GetEnv("HOST", "127.0.0.1"), "http host")
	flag.UintVar(&port, "p", initializers.GetEnvUint("PORT", 7123), "http port")
	flag.StringVar(&gettextDir, "gettext", "", "use gettext translations from given directory")
	flag.Var(&langs, "language", "add symbol resolution for language")
	flag.Parse()

	logg.Infof("start command", "dbdir", dbDir, "resourcedir", resourceDir, "outputsize", size, "sessionId", sessionId)

	ctx := context.Background()
	ctx = context.WithValue(ctx, "Database", database)

	ln, err := lang.LanguageFromCode(config.DefaultLanguage)
	if err != nil {
		fmt.Fprintf(os.Stderr, "default language set error: %v", err)
		os.Exit(1)
	}
	ctx = context.WithValue(ctx, "Language", ln)

	pfp := path.Join(scriptDir, "pp.csv")

	cfg := engine.Config{
		Root:          "root",
		OutputSize:    uint32(size),
		FlagCount:     uint32(128),
		MenuSeparator: menuSeparator,
	}

	if engineDebug {
		cfg.EngineDebug = true
	}

	menuStorageService := storage.NewMenuStorageService(dbDir, resourceDir)
	rs, err := menuStorageService.GetResource(ctx)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.Error())
		os.Exit(1)
	}

	err = menuStorageService.EnsureDbDir()
	if err != nil {
		fmt.Fprintf(os.Stderr, err.Error())
		os.Exit(1)
	}

	userdataStore, err := menuStorageService.GetUserdataDb(ctx)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.Error())
		os.Exit(1)
	}
	defer userdataStore.Close()

	dbResource, ok := rs.(*resource.DbResource)
	if !ok {
		os.Exit(1)
	}

	lhs, err := handlers.NewLocalHandlerService(ctx, pfp, true, dbResource, cfg, rs)
	lhs.SetDataStore(&userdataStore)
	accountService := remote.AccountService{}

	hl, err := lhs.GetHandler(&accountService)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.Error())
		os.Exit(1)
	}

	stateStore, err := menuStorageService.GetStateStore(ctx)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.Error())
		os.Exit(1)
	}
	defer stateStore.Close()

	rp := &asyncRequestParser{
		sessionId: sessionId,
	}
	sh := handlers.NewBaseSessionHandler(cfg, rs, stateStore, userdataStore, rp, hl)
	cfg.SessionId = sessionId
	rqs := handlers.RequestSession{
		Ctx:    ctx,
		Writer: os.Stdout,
		Config: cfg,
	}

	cint := make(chan os.Signal)
	cterm := make(chan os.Signal)
	signal.Notify(cint, os.Interrupt, syscall.SIGINT)
	signal.Notify(cterm, os.Interrupt, syscall.SIGTERM)
	go func() {
		select {
		case _ = <-cint:
		case _ = <-cterm:
		}
		sh.Shutdown()
	}()

	for true {
		rqs, err = sh.Process(rqs)
		if err != nil {
			logg.ErrorCtxf(ctx, "error in process: %v", "err", err)
			fmt.Errorf("error in process: %v", err)
			os.Exit(1)
		}
		rqs, err = sh.Output(rqs)
		if err != nil {
			logg.ErrorCtxf(ctx, "error in output: %v", "err", err)
			fmt.Errorf("error in output: %v", err)
			os.Exit(1)
		}
		rqs, err = sh.Reset(rqs)
		if err != nil {
			logg.ErrorCtxf(ctx, "error in reset: %v", "err", err)
			fmt.Errorf("error in reset: %v", err)
			os.Exit(1)
		}
		fmt.Println("")
		_, err = fmt.Scanln(&rqs.Input)
		if err != nil {
			logg.ErrorCtxf(ctx, "error in input", "err", err)
			fmt.Errorf("error in input: %v", err)
			os.Exit(1)
		}
	}
}