package web

import (
	"bytes"
	"embed"
	"html/template"

	"git.ulra.eu/adro/miniwol/config"

	"github.com/labstack/echo/v4"
)

//go:embed template/*
var templateFS embed.FS
var templates *template.Template

func init() {
	var err error

	templates, err = template.ParseFS(templateFS, "template/*.html")
	if err != nil {
		panic(err)
	}
}

func Run() error {
	e := echo.New()

	e.GET("/", index)
	e.GET("/style.css", style)
	e.GET("/favicon.ico", favicon)
	e.POST("/auth", auth)
	e.POST("/deauth", withAuth(deauth))
	e.POST("/add", withAuth(add))
	e.POST("/wake", withAuth(wake))
	e.POST("/remove", withAuth(remove))

	return e.Start(config.Config.Server)
}

func Page(c echo.Context, code int, title string, page string, auth bool, data interface{}) error {
	var contentBuffer bytes.Buffer
	err := templates.ExecuteTemplate(&contentBuffer, page, data)
	if err != nil {
		return err
	}
	var pageBuffer bytes.Buffer
	err = templates.ExecuteTemplate(&pageBuffer, "page.html", struct {
		Title   string
		Content template.HTML
		Auth    bool
	}{
		Title:   title,
		Content: template.HTML(contentBuffer.String()),
		Auth:    auth,
	})
	if err != nil {
		return err
	}
	return c.HTML(code, pageBuffer.String())
}

// Handlers
func index(c echo.Context) error {
	session, err := c.Cookie("session")
	if err != nil || checkAuth(session.Value) != nil {
		return Page(c, 200, "Login", "login.html", false, nil)
	} else {
		return Page(c, 200, "Devices", "device.html", true, config.Config)
	}
}

func style(c echo.Context) error {
	styleData, err := templateFS.ReadFile("template/style.css")
	if err != nil {
		return err
	}
	return c.Blob(200, "text/css", styleData)
}

func favicon(c echo.Context) error {
	return c.NoContent(204)
}