package main

import (
	"context"
	"flag"
	"fmt"
	"net/http"
	"os"
	"os/signal"
	"path"
	"strconv"
	"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"
	testdataloader "github.com/peteole/testdata-loader"

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

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

func init() {
	initializers.LoadEnvVariables(baseDir)
}

func main() {
	config.LoadConfig()

	var dbDir string
	var resourceDir string
	var size uint
	var database string
	var dbSchema string
	var engineDebug bool
	var host string
	var port uint
	var gettextDir string
	var langs args.LangVar
	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.StringVar(&dbSchema, "schema", "public", "database schema 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)

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

	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)

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

	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 := &httpserver.DefaultRequestParser{}
	bsh := handlers.NewBaseSessionHandler(cfg, rs, stateStore, userdataStore, rp, hl)
	sh := httpserver.ToSessionHandler(bsh)
	s := &http.Server{
		Addr:    fmt.Sprintf("%s:%s", host, strconv.Itoa(int(port))),
		Handler: sh,
	}
	s.RegisterOnShutdown(sh.Shutdown)

	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:
		}
		s.Shutdown(ctx)
	}()
	err = s.ListenAndServe()
	if err != nil {
		logg.Infof("Server closed with error", "err", err)
	}
}