%%--------------------------------------------------------------------
%% Copyright (c) 2020-2022 EMQ Technologies Co., Ltd. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%%     http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%--------------------------------------------------------------------

-module(emqx_dashboard_cli).

-export([
    load/0,
    admins/1,
    unload/0
]).

load() ->
    emqx_ctl:register_command(admins, {?MODULE, admins}, []).

admins(["add", Username, Password]) ->
    admins(["add", Username, Password, ""]);
admins(["add", Username, Password, Desc]) ->
    case emqx_dashboard_admin:add_user(bin(Username), bin(Password), bin(Desc)) of
        {ok, _} ->
            emqx_ctl:print("ok~n");
        {error, Reason} ->
            print_error(Reason)
    end;
admins(["passwd", Username, Password]) ->
    case emqx_dashboard_admin:change_password(bin(Username), bin(Password)) of
        {ok, _} ->
            emqx_ctl:print("ok~n");
        {error, Reason} ->
            print_error(Reason)
    end;
admins(["del", Username]) ->
    case emqx_dashboard_admin:remove_user(bin(Username)) of
        {ok, _} ->
            emqx_ctl:print("ok~n");
        {error, Reason} ->
            print_error(Reason)
    end;
admins(_) ->
    emqx_ctl:usage(
        [
            {"admins add <Username> <Password> <Description>", "Add dashboard user"},
            {"admins passwd <Username> <Password>", "Reset dashboard user password"},
            {"admins del <Username>", "Delete dashboard user"}
        ]
    ).

unload() ->
    emqx_ctl:unregister_command(admins).

bin(S) -> iolist_to_binary(S).

print_error(Reason) when is_binary(Reason) ->
    emqx_ctl:print("Error: ~s~n", [Reason]).
%% Maybe has more types of error, but there is only binary now. So close it for dialyzer.
% print_error(Reason) ->
%     emqx_ctl:print("Error: ~p~n", [Reason]).