package hwsauth

import (
	"net/http"
	"time"

	"git.haelnorr.com/h/golib/hws"
)

// Checks if the model is set in the context and shows 401 page if not logged in
func (auth *Authenticator[T]) LoginReq(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		_, ok := getAuthorizedModel[T](r.Context())
		if !ok {
			page, err := auth.errorPage(http.StatusUnauthorized)
			if err != nil {
				auth.server.ThrowError(w, r, hws.HWSError{
					Error:           err,
					Message:         "Failed to get valid error page",
					StatusCode:      http.StatusInternalServerError,
					RenderErrorPage: true,
				})
			}
			err = page.Render(r.Context(), w)
			if err != nil {
				auth.server.ThrowError(w, r, hws.HWSError{
					Error:           err,
					Message:         "Failed to render error page",
					StatusCode:      http.StatusInternalServerError,
					RenderErrorPage: true,
				})
			}
			return
		}
		next.ServeHTTP(w, r)
	})
}

// Checks if the model is set in the context and redirects them to the landing page if
// they are logged in
func (auth *Authenticator[T]) LogoutReq(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		_, ok := getAuthorizedModel[T](r.Context())
		if ok {
			http.Redirect(w, r, auth.LandingPage, http.StatusFound)
			return
		}
		next.ServeHTTP(w, r)
	})
}

// FreshReq protects a route from access if the auth token is not fresh.
// A status code of 444 will be written to the header and the request will be terminated.
// As an example, this can be used on the client to show a confirm password dialog to refresh their login
func (auth *Authenticator[T]) FreshReq(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		model, ok := getAuthorizedModel[T](r.Context())
		if !ok {
			page, err := auth.errorPage(http.StatusUnauthorized)
			if err != nil {
				auth.server.ThrowError(w, r, hws.HWSError{
					Error:           err,
					Message:         "Failed to get valid error page",
					StatusCode:      http.StatusInternalServerError,
					RenderErrorPage: true,
				})
			}
			err = page.Render(r.Context(), w)
			if err != nil {
				auth.server.ThrowError(w, r, hws.HWSError{
					Error:           err,
					Message:         "Failed to render error page",
					StatusCode:      http.StatusInternalServerError,
					RenderErrorPage: true,
				})
			}
			return
		}
		isFresh := time.Now().Before(time.Unix(model.fresh, 0))
		if !isFresh {
			w.WriteHeader(444)
			return
		}
		next.ServeHTTP(w, r)
	})
}