//go:build nullauth

package auth

import (
	"net/http"
)

type nullProvider struct{}

func NewNull() (AuthProvider, error) {
	return nullProvider{}, nil
}

func (nullProvider) Middleware() func(http.Handler) http.Handler {
	return func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			nullAuth(next, w, r)
		})
	}
}

func nullAuth(next http.Handler, w http.ResponseWriter, r *http.Request) {
	user, _, ok := r.BasicAuth()
	if !ok {
		w.Header().Add("WWW-Authenticate", `Basic realm="Please provide your system credentials", charset="UTF-8"`)
		http.Error(w, "HTTP Basic auth is required", http.StatusUnauthorized)
		return
	}
	authCtx := AuthContext{
		AuthMethod: "null",
		UserName:   user,
	}
	ctx := NewContext(r.Context(), &authCtx)
	r = r.WithContext(ctx)
	next.ServeHTTP(w, r)
}