package helpers

import (
	"crypto/subtle"
	"net/http"

	"tea.chunkbyte.com/kato/go-worm/lib/config"
)

func BasicAuth(next http.Handler) http.Handler {
	user := []byte(config.AuthUser)
	pass := []byte(config.AuthPass)
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.Path {
		case "/openapi", "/openapi.json":
			next.ServeHTTP(w, r)
			return
		}
		u, p, ok := r.BasicAuth()
		if !ok ||
			subtle.ConstantTimeCompare([]byte(u), user) != 1 ||
			subtle.ConstantTimeCompare([]byte(p), pass) != 1 {
			w.Header().Set("WWW-Authenticate", `Basic realm="win64_mp"`)
			WriteError(w, http.StatusUnauthorized, "unauthorized")
			return
		}
		next.ServeHTTP(w, r)
	})
}