package cmd

import (
	"crypto/subtle"
	"embed"
	"fmt"
	"html/template"
	"io"
	"log"

	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var (
	webUser        string
	webPassword    string
	webPort        int
	webApiHost     string
	webApiKey      string
	webApiPort     int
	webApiProtocol string
)

const (
	viperWebUser       string = "web.user"
	flagWebUser        string = "web-user"
	defaultWebUser     string = "bottin"
	descriptionWebUser string = "Web client basic auth user"

	viperWebPassword       string = "web.password"
	flagWebPassword        string = "web-password"
	defaultWebPassword     string = "bottin"
	descriptionWebPassword string = "Web client basic auth password"

	viperWebPort       string = "web.port"
	flagWebPort        string = "web-port"
	defaultWebPort     int    = 2312
	descriptionWebPort string = "Web client port"

	viperWebAPIHost       string = "api.host"
	flagWebAPIHost        string = "api-host"
	defaultWebAPIHost     string = "api"
	descriptionWebAPIHost string = "Target API server host"

	viperWebAPIKey       string = "api.key"
	flagWebAPIKey        string = "api-key"
	defaultWebAPIKey     string = "bottin"
	descriptionWebAPIKey string = "Target API server key"

	viperWebAPIPort       string = "api.port"
	flagWebAPIPort        string = "api-port"
	defaultWebAPIPort     int    = 1312
	descriptionWebAPIPort string = "Target API server port"

	viperWebAPIProtocol       string = "api.protocol"
	flagWebAPIProtocol        string = "api-protocol"
	defaultWebAPIProtocol     string = "http"
	descriptionWebAPIProtocol string = "Target API server protocol (http/https)"
)

var templatesFS embed.FS

type Template struct {
	templates *template.Template
}

func (t *Template) Render(w io.Writer, name string, data interface{}, c echo.Context) error {
	return t.templates.ExecuteTemplate(w, name, data)
}

// webCmd represents the web command
var webCmd = &cobra.Command{
	Use:   "web",
	Short: "Démarrer le client web",
	Args:  cobra.ExactArgs(0),
	Run: func(cmd *cobra.Command, args []string) {
		webApiHost = viper.GetString(viperWebAPIHost)
		webApiKey = viper.GetString(viperWebAPIKey)
		webApiPort = viper.GetInt(viperWebAPIPort)
		webApiProtocol = viper.GetString(viperWebAPIProtocol)
		webPassword = viper.GetString(viperWebPassword)
		webPort = viper.GetInt(viperWebPort)
		webUser = viper.GetString(viperWebUser)

		// Ping API server
		/*
			client := http.DefaultClient
			defer client.CloseIdleConnections()

			apiClient := data.NewApiClient(client, webApiKey, webApiHost, webApiProtocol, webApiPort)

			pingResult, err := apiClient.GetHealth()
			if err != nil {
				log.Fatal(err)
			}

			log.Println(pingResult)
		*/

		e := echo.New()

		// Middlewares

		e.Pre(middleware.AddTrailingSlash())

		e.Use(middleware.BasicAuth(func(user, password string, c echo.Context) (bool, error) {
			usersMatch := subtle.ConstantTimeCompare([]byte(user), []byte(webUser)) == 1
			passwordsMatch := subtle.ConstantTimeCompare([]byte(password), []byte(webPassword)) == 1
			return usersMatch && passwordsMatch, nil
		}))

		// Template

		t := &Template{
			templates: template.Must(template.ParseFS(templatesFS, "templates/*.html")),
		}

		e.Renderer = t

		// Routes
		/*
			handler := webhandlers.Handler{APIClient: apiClient}

			e.GET("/", handler.GetIndex)
			e.GET("/membre/", handler.GetMembre)
		*/

		// Execution

		e.Logger.Fatal(e.Start(
			fmt.Sprintf(":%d", webPort)))
	},
}

func init() {
	rootCmd.AddCommand(webCmd)
	//templatesFS = web.GetTemplates()

	// web.api.host
	webCmd.Flags().String(flagWebAPIHost, defaultWebAPIHost, descriptionWebAPIHost)
	if err := viper.BindPFlag(viperWebAPIHost, webCmd.Flags().Lookup(flagWebAPIHost)); err != nil {
		log.Fatal(err)
	}

	// web.api.key
	webCmd.Flags().String(flagWebAPIKey, defaultWebAPIKey, descriptionWebAPIKey)
	if err := viper.BindPFlag(viperWebAPIKey, webCmd.Flags().Lookup(flagWebAPIKey)); err != nil {
		log.Fatal(err)
	}

	// web.api.protocol
	webCmd.Flags().String(flagWebAPIProtocol, defaultWebAPIProtocol, descriptionWebAPIProtocol)
	if err := viper.BindPFlag(viperWebAPIProtocol, webCmd.Flags().Lookup(flagWebAPIProtocol)); err != nil {
		log.Fatal(err)
	}

	// web.api.port
	webCmd.Flags().Int(flagWebAPIPort, defaultWebAPIPort, descriptionWebAPIPort)
	if err := viper.BindPFlag(viperWebAPIPort, webCmd.Flags().Lookup(flagWebAPIPort)); err != nil {
		log.Fatal(err)
	}

	// web.password
	webCmd.Flags().String(flagWebPassword, defaultWebPassword, descriptionWebPassword)
	if err := viper.BindPFlag(viperWebPassword, webCmd.Flags().Lookup(flagWebPassword)); err != nil {
		log.Fatal(err)
	}

	// web.port
	webCmd.Flags().Int(flagWebPort, defaultWebPort, descriptionWebPort)
	if err := viper.BindPFlag(viperWebPort, webCmd.Flags().Lookup(flagWebPort)); err != nil {
		log.Fatal(err)
	}

	// web.user
	webCmd.Flags().String(flagWebUser, defaultWebUser, descriptionWebUser)
	if err := viper.BindPFlag(viperWebUser, webCmd.Flags().Lookup(flagWebUser)); err != nil {
		log.Fatal(err)
	}
}