package main

import (
	"crypto/subtle"
	"embed"
	"fmt"
	rice "github.com/GeertJohan/go.rice"
	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
	"html/template"
	"net/http"
	"os"
)

var (
	templates map[string]*template.Template
	//go:embed static
	staticFiles embed.FS
	//go:embed views/layout views/page
	views   embed.FS
	config  Config
	actions Actions
)

func main() {
	e := echo.New()
	e.HideBanner = true

	if len(os.Args) != 2 {
		fmt.Errorf("Configuration required!")
		os.Exit(1)
	}

	value, err := createConfigFromFile(os.Args[1])

	if err != nil {
		fmt.Printf("Configuration error:")
		fmt.Printf("%+v\n", err)
		os.Exit(1)
	}

	config = value
	e.Use(middleware.BasicAuth(func(username, password string, c echo.Context) (bool, error) {
		if config.Server.Auth.Username == "" && config.Server.Auth.Password == "" {
			return true, nil
		}

		isValidUsername := subtle.ConstantTimeCompare([]byte(username), []byte(config.Server.Auth.Username)) == 1
		isValidPassword := subtle.ConstantTimeCompare([]byte(password), []byte(config.Server.Auth.Password)) == 1

		if isValidUsername && isValidPassword {
			return true, nil
		}

		return false, nil
	}))

	assetHandler := http.FileServer(rice.MustFindBox("static").HTTPBox())
	actions = createActions()

	e.GET("/static/*", echo.WrapHandler(http.StripPrefix("/static/", assetHandler)))
	e.GET("/manifest.webmanifest", manifestController)
	e.GET("/", homeController)
	e.GET("/ws", wsController)

	if config.Server.Tls.Enable == false {
		e.Logger.Fatal(e.Start(config.Server.Listen))
	} else {
		e.Logger.Fatal(e.StartTLS(
			config.Server.Listen,
			config.Server.Tls.CertFile,
			config.Server.Tls.CertKeyFile,
		))
	}
}