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"
	testdataloader "github.com/peteole/testdata-loader"

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

var (
	logg          = logging.NewVanilla().WithDomain("AfricasTalking").WithContextKey("at-session-id")
	baseDir       = testdataloader.GetBasePath()
	scriptDir     = path.Join("services", "registration")
	build         = "dev"
	menuSeparator = ": "
)

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

func main() {
	config.LoadConfig()

	var connStr string
	var resourceDir string
	var size uint
	var database string
	var dbSchema string
	var engineDebug bool
	var host string
	var port uint
	var err error
	var gettextDir string
	var langs args.LangVar

	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()

	if connStr != "" {
		connStr = config.DbConn
	}
	connData, err := storage.ToConnData(connStr)
	if err != nil {
		fmt.Fprintf(os.Stderr, "connstr err: %v", err)
		os.Exit(1)
	}

	logg.Infof("start command", "build", build, "conn", connData, "resourcedir", resourceDir, "outputsize", size)

	ctx := context.Background()
	ctx = context.WithValue(ctx, "Database", database)
	ctx = context.WithValue(ctx, "Schema", dbSchema)
	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(connData, resourceDir)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.Error())
		os.Exit(1)
	}

	rs, err := menuStorageService.GetResource(ctx)
	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)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.Error())
		os.Exit(1)
	}
	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 := &at.ATRequestParser{}
	bsh := handlers.NewBaseSessionHandler(cfg, rs, stateStore, userdataStore, rp, hl)
	sh := at.NewATSessionHandler(bsh)

	mux := http.NewServeMux()
	mux.Handle(initializers.GetEnv("AT_ENDPOINT", "/"), sh)

	s := &http.Server{
		Addr:    fmt.Sprintf("%s:%s", host, strconv.Itoa(int(port))),
		Handler: mux,
	}
	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)
	}
}