-module(telega@error).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([to_string/1, 'try'/3]).
-export_type([telega_error/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

-type telega_error() :: {telegram_api_error, integer(), binary()} |
    {fetch_error, gleam@dynamic:dynamic_()} |
    {json_decode_error, gleam@json:decode_error()} |
    api_to_request_convert_error |
    set_webhook_error |
    no_session_settings_error |
    {registry_start_error, binary()} |
    {bot_start_error, binary()} |
    {chat_instance_start_error, binary()} |
    file_not_found_error |
    {decode_update_error, binary()} |
    {unknown_update_error, telega@model:update()}.

-file("src/telega/error.gleam", 30).
-spec to_string(telega_error()) -> binary().
to_string(Error) ->
    case Error of
        {telegram_api_error, Error_code, Description} ->
            <<<<<<"Telegram API error: "/utf8,
                        (erlang:integer_to_binary(Error_code))/binary>>/binary,
                    " "/utf8>>/binary,
                Description/binary>>;

        {json_decode_error, Error@1} ->
            <<"Decode JSON error: "/utf8,
                (gleam@string:inspect(Error@1))/binary>>;

        api_to_request_convert_error ->
            <<"Failed to convert API request to HTTP request"/utf8>>;

        {fetch_error, Error@2} ->
            <<"Failed to send request: "/utf8,
                (gleam@string:inspect(Error@2))/binary>>;

        set_webhook_error ->
            <<"Failed to set webhook"/utf8>>;

        no_session_settings_error ->
            <<"Session settings not initialized"/utf8>>;

        {registry_start_error, Reason} ->
            <<"Failed to start registry: "/utf8, Reason/binary>>;

        {bot_start_error, Reason@1} ->
            <<"Failed to start bot: "/utf8, Reason@1/binary>>;

        {chat_instance_start_error, Reason@2} ->
            <<"Failed to start chat instance: "/utf8, Reason@2/binary>>;

        file_not_found_error ->
            <<"File not found"/utf8>>;

        {decode_update_error, Reason@3} ->
            <<"Failed to decode update: "/utf8, Reason@3/binary>>;

        {unknown_update_error, Update} ->
            <<"Unknown update: "/utf8, (gleam@string:inspect(Update))/binary>>
    end.

-file("src/telega/error.gleam", 50).
?DOC(" Helper to replace `result.try` for api call and error mapping.\n").
-spec 'try'(
    {ok, AMUU} | {error, telega_error()},
    fun((telega_error()) -> AMUX),
    fun((AMUU) -> {ok, AMUY} | {error, AMUX})
) -> {ok, AMUY} | {error, AMUX}.
'try'(Result, To_error, Fun) ->
    case Result of
        {ok, X} ->
            Fun(X);

        {error, E} ->
            {error, To_error(E)}
    end.