package cmd

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

	"codeberg.org/vlbeaudoin/serpents"
	"git.agecem.com/agecem/bottin/v6/data"
	"git.agecem.com/agecem/bottin/v6/web"
	"git.agecem.com/agecem/bottin/v6/web/webhandlers"
	"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
)

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("web.api.host")
		webApiKey = viper.GetString("web.api.key")
		webApiPort = viper.GetInt("web.api.port")
		webApiProtocol = viper.GetString("web.api.protocol")
		webPassword = viper.GetString("web.password")
		webPort = viper.GetInt("web.port")
		webUser = viper.GetString("web.user")

		// 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
	serpents.String(webCmd.Flags(),
		"web.api.host", "web-api-host", "api",
		"Remote API server host")

	// web.api.key
	serpents.String(webCmd.Flags(),
		"web.api.key", "web-api-key", "bottin",
		"Remote API server key")

	// web.api.protocol
	serpents.String(webCmd.Flags(),
		"web.api.protocol", "web-api-protocol", "http",
		"Remote API server protocol")

	// web.api.port
	serpents.Int(webCmd.Flags(),
		"web.api.port", "web-api-port", 1312,
		"Remote API server port")

	// web.password
	serpents.String(webCmd.Flags(),
		"web.password", "web-password", "bottin",
		"Web client password")

	// web.port
	serpents.Int(webCmd.Flags(),
		"web.port", "web-port", 2312,
		"Web client port")

	// web.user
	serpents.String(webCmd.Flags(),
		"web.user", "web-user", "bottin",
		"Web client user")
}