package http

import (
	"net/http"
	"strings"
)

func BearerAuth(staticToken string, next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if bearerToken(r.Header.Get("Authorization")) != staticToken {
			WriteJSON(w, http.StatusUnauthorized, Response{
				Success: false,
				Message: "Unauthenticated.",
				Data:    nil,
			})
			return
		}

		next.ServeHTTP(w, r)
	})
}

func bearerToken(header string) string {
	const prefix = "Bearer "
	if !strings.HasPrefix(header, prefix) {
		return ""
	}

	return strings.TrimSpace(strings.TrimPrefix(header, prefix))
}