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

-export([new_botcommand_parameters/0, decode/1, scope_to_json/1, encode_botcommand_parameters/1, from/1]).
-export_type([bot_command/0, bot_command_scope/0, bot_command_parameters/0]).

-type bot_command() :: {bot_command, binary(), binary()}.

-type bot_command_scope() :: bot_command_default_scope |
    bot_command_all_private_chats_scope |
    bot_command_scope_all_group_chats |
    bot_command_scope_all_chat_administrators |
    {bot_command_scope_chat, integer()} |
    {bot_command_scope_chat_string, telega@models@common:int_or_string()} |
    {bot_command_scope_chat_administrators,
        telega@models@common:int_or_string()} |
    {bot_command_scope_chat_member,
        telega@models@common:int_or_string(),
        integer()}.

-type bot_command_parameters() :: {bot_command_parameters,
        gleam@option:option(bot_command_scope()),
        gleam@option:option(binary())}.

-spec new_botcommand_parameters() -> bot_command_parameters().
new_botcommand_parameters() ->
    {bot_command_parameters, none, none}.

-spec decode(gleam@dynamic:dynamic_()) -> {ok, list(bot_command())} |
    {error, list(gleam@dynamic:decode_error())}.
decode(Json) ->
    _pipe = Json,
    (gleam@dynamic:list(
        gleam@dynamic:decode2(
            fun(Field@0, Field@1) -> {bot_command, Field@0, Field@1} end,
            gleam@dynamic:field(<<"command"/utf8>>, fun gleam@dynamic:string/1),
            gleam@dynamic:field(
                <<"description"/utf8>>,
                fun gleam@dynamic:string/1
            )
        )
    ))(_pipe).

-spec scope_to_json(bot_command_scope()) -> gleam@json:json().
scope_to_json(Scope) ->
    case Scope of
        bot_command_default_scope ->
            gleam@json:object(
                [{<<"type"/utf8>>, gleam@json:string(<<"default"/utf8>>)}]
            );

        bot_command_all_private_chats_scope ->
            gleam@json:object(
                [{<<"type"/utf8>>,
                        gleam@json:string(<<"all_private_chats"/utf8>>)}]
            );

        bot_command_scope_all_group_chats ->
            gleam@json:object(
                [{<<"type"/utf8>>,
                        gleam@json:string(<<"all_group_chats"/utf8>>)}]
            );

        bot_command_scope_all_chat_administrators ->
            gleam@json:object(
                [{<<"type"/utf8>>,
                        gleam@json:string(<<"all_chat_administrators"/utf8>>)}]
            );

        {bot_command_scope_chat, Chat_id} ->
            gleam@json:object(
                [{<<"type"/utf8>>, gleam@json:string(<<"chat"/utf8>>)},
                    {<<"chat_id"/utf8>>, gleam@json:int(Chat_id)}]
            );

        {bot_command_scope_chat_string, Chat_id@1} ->
            gleam@json:object(
                [{<<"type"/utf8>>, gleam@json:string(<<"chat"/utf8>>)},
                    {<<"chat_id"/utf8>>,
                        telega@models@common:string_or_int_to_json(Chat_id@1)}]
            );

        {bot_command_scope_chat_administrators, Chat_id@2} ->
            gleam@json:object(
                [{<<"type"/utf8>>,
                        gleam@json:string(<<"chat_administrators"/utf8>>)},
                    {<<"chat_id"/utf8>>,
                        telega@models@common:string_or_int_to_json(Chat_id@2)}]
            );

        {bot_command_scope_chat_member, Chat_id@3, User_id} ->
            gleam@json:object(
                [{<<"type"/utf8>>, gleam@json:string(<<"chat_member"/utf8>>)},
                    {<<"chat_id"/utf8>>,
                        telega@models@common:string_or_int_to_json(Chat_id@3)},
                    {<<"user_id"/utf8>>, gleam@json:int(User_id)}]
            )
    end.

-spec encode_botcommand_parameters(bot_command_parameters()) -> list({binary(),
    gleam@json:json()}).
encode_botcommand_parameters(Params) ->
    Scope@1 = begin
        _pipe = erlang:element(2, Params),
        _pipe@1 = gleam@option:map(
            _pipe,
            fun(Scope) -> [{<<"scope"/utf8>>, scope_to_json(Scope)}] end
        ),
        gleam@option:unwrap(_pipe@1, [])
    end,
    Language_code@1 = begin
        _pipe@2 = erlang:element(3, Params),
        _pipe@3 = gleam@option:map(
            _pipe@2,
            fun(Language_code) ->
                [{<<"language_code"/utf8>>, gleam@json:string(Language_code)}]
            end
        ),
        gleam@option:unwrap(_pipe@3, [])
    end,
    gleam@list:concat([Scope@1, Language_code@1]).

-spec from(list({binary(), binary()})) -> list(bot_command()).
from(Commands) ->
    _pipe = Commands,
    gleam@list:map(
        _pipe,
        fun(Command) ->
            {Command@1, Description} = Command,
            {bot_command, Command@1, Description}
        end
    ).