package admin

import (
	"html/template"
	"net/http"

	"github.com/gorilla/sessions"
)

type AuthCookie struct {
	Templates *template.Template
	Store     *sessions.CookieStore
}

func (app *AuthCookie) LoginPage(res http.ResponseWriter, req *http.Request) {
	formErr := make(map[string]string)
	switch req.Method {
	case "POST":
		username := req.FormValue("username")
		if username == "" {
			formErr["username"] = "Empty username"
		}
		password := req.FormValue("password")
		if password == "" {
			formErr["password"] = "Empty password"
		}
		// FIXME verifiy password with file in data dir
		if len(formErr) == 0 {
			app.SaveUsername(username, res, req)
			RedirectHome(res, req)
			return
		}
		fallthrough
	case "GET":
		app.Templates.ExecuteTemplate(res, "login.html", formErr)
	}
}
func (app *AuthCookie) LogoutPage(res http.ResponseWriter, req *http.Request) {
	app.SaveUsername("", res, req)
	RedirectHome(res, req)
}
func (app *AuthCookie) CurrentSession(res http.ResponseWriter, req *http.Request) *sessions.Session {
	session, _ := app.Store.Get(req, "session")
	return session
}
func (app *AuthCookie) SaveUsername(username string, res http.ResponseWriter, req *http.Request) {
	session := app.CurrentSession(res, req)
	session.Values["username"] = username
	session.Save(req, res)
}
func (app *AuthCookie) IsLoggedIn(res http.ResponseWriter, req *http.Request) bool {
	session := app.CurrentSession(res, req)
	return session != nil && session.Values["username"] != ""
}
func (app *AuthCookie) Username(res http.ResponseWriter, req *http.Request) string {
	session := app.CurrentSession(res, req)
	if session == nil {
		return ""
	}
	return session.Values["username"].(string)
}
func RedirectHome(res http.ResponseWriter, req *http.Request) {
	http.Redirect(res, req, "/", http.StatusSeeOther)
}