-module(claude@types@tool).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/claude/types/tool.gleam").
-export([registry/0, register/2, dispatch/3, to_json/1, unregister/2, is_empty/1]).
-export_type([tool/1, erased_tool/0, registry/0, tool_choice/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 tool(HII) :: {tool,
        binary(),
        binary(),
        glon:json_schema(HII),
        fun((HII) -> {ok, binary()} | {error, binary()})}.

-type erased_tool() :: {erased_tool,
        binary(),
        binary(),
        gleam@json:json(),
        fun((binary()) -> {ok, binary()} | {error, binary()})}.

-opaque registry() :: {registry, gleam@dict:dict(binary(), erased_tool())}.

-type tool_choice() :: {auto, boolean()} |
    {any, boolean()} |
    {specific_tool, binary(), boolean()} |
    no_tools.

-file("src/claude/types/tool.gleam", 28).
?DOC(" Erase a typed tool into the internal representation.\n").
-spec erase(tool(any())) -> erased_tool().
erase(Tool) ->
    {erased_tool,
        erlang:element(2, Tool),
        erlang:element(3, Tool),
        glon:to_json(erlang:element(4, Tool)),
        fun(Input) -> case glon:decode(erlang:element(4, Tool), Input) of
                {ok, Params} ->
                    (erlang:element(5, Tool))(Params);

                {error, _} ->
                    {error,
                        <<"Failed to decode tool input for: "/utf8,
                            (erlang:element(2, Tool))/binary>>}
            end end}.

-file("src/claude/types/tool.gleam", 48).
?DOC(" Create an empty tool registry.\n").
-spec registry() -> registry().
registry() ->
    {registry, maps:new()}.

-file("src/claude/types/tool.gleam", 54).
?DOC(
    " Register a typed tool. Erases the type parameter internally.\n"
    " Pipeable: `registry() |> register(weather_tool()) |> register(search_tool())`\n"
).
-spec register(registry(), tool(any())) -> registry().
register(Reg, Tool) ->
    T = erase(Tool),
    {registry,
        gleam@dict:insert(erlang:element(2, Reg), erlang:element(2, T), T)}.

-file("src/claude/types/tool.gleam", 66).
?DOC(
    " Dispatch a tool call by name. Used by the tool runner.\n"
    "\n"
    " The input string is parsed from JSON on each call. This is a known\n"
    " trade-off: tool input is stored as a JSON string for conversation history\n"
    " serialization, requiring a parse-serialize-parse cycle when the API response\n"
    " is decoded and then dispatched. A future optimization could pass the raw\n"
    " Dynamic value directly to avoid the redundant JSON round-trip.\n"
).
-spec dispatch(registry(), binary(), binary()) -> {ok, binary()} |
    {error, binary()}.
dispatch(Reg, Name, Input) ->
    case gleam_stdlib:map_get(erlang:element(2, Reg), Name) of
        {ok, Tool} ->
            (erlang:element(5, Tool))(Input);

        {error, _} ->
            {error, <<"Unknown tool: "/utf8, Name/binary>>}
    end.

-file("src/claude/types/tool.gleam", 78).
?DOC(" Encode all tools as a JSON array for the API request.\n").
-spec to_json(registry()) -> gleam@json:json().
to_json(Reg) ->
    _pipe = maps:values(erlang:element(2, Reg)),
    gleam@json:array(
        _pipe,
        fun(T) ->
            gleam@json:object(
                [{<<"name"/utf8>>, gleam@json:string(erlang:element(2, T))},
                    {<<"description"/utf8>>,
                        gleam@json:string(erlang:element(3, T))},
                    {<<"input_schema"/utf8>>, erlang:element(4, T)}]
            )
        end
    ).

-file("src/claude/types/tool.gleam", 90).
?DOC(" Remove a tool by name.\n").
-spec unregister(registry(), binary()) -> registry().
unregister(Reg, Name) ->
    {registry, gleam@dict:delete(erlang:element(2, Reg), Name)}.

-file("src/claude/types/tool.gleam", 95).
?DOC(" Check if the registry is empty.\n").
-spec is_empty(registry()) -> boolean().
is_empty(Reg) ->
    gleam@dict:is_empty(erlang:element(2, Reg)).