-module(anthropic@streaming@accumulator).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/anthropic/streaming/accumulator.gleam").
-export([new/0, process_event/2, process_events/1, process_events_with_callback/2, build_response/1, accumulate/1, get_accumulated_text/1, get_accumulated_tool_inputs/1, has_content/1, has_error/1, total_tokens/1]).
-export_type([accumulator_state/0, content_block_state/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.

?MODULEDOC(
    " Stream accumulator for building complete messages from streaming events\n"
    "\n"
    " This module provides utilities for accumulating streaming events into\n"
    " a complete message response. It tracks content blocks, handles deltas,\n"
    " and produces the final message with usage statistics.\n"
).

-type accumulator_state() :: {accumulator_state,
        gleam@option:option(binary()),
        gleam@option:option(binary()),
        gleam@option:option(anthropic@types@message:role()),
        gleam@option:option(binary()),
        gleam@dict:dict(integer(), content_block_state()),
        gleam@option:option(anthropic@types@request:stop_reason()),
        gleam@option:option(binary()),
        integer(),
        integer(),
        boolean(),
        gleam@option:option(anthropic@types@streaming:stream_error())}.

-type content_block_state() :: {text_block_state, binary()} |
    {tool_use_block_state, binary(), binary(), binary()}.

-file("src/anthropic/streaming/accumulator.gleam", 71).
?DOC(" Create a new accumulator state\n").
-spec new() -> accumulator_state().
new() ->
    {accumulator_state,
        none,
        none,
        none,
        none,
        maps:new(),
        none,
        none,
        0,
        0,
        false,
        none}.

-file("src/anthropic/streaming/accumulator.gleam", 127).
?DOC(" Handle message_start event\n").
-spec handle_message_start(
    accumulator_state(),
    anthropic@types@streaming:message_start()
) -> accumulator_state().
handle_message_start(State, Msg) ->
    {accumulator_state,
        {some, erlang:element(2, Msg)},
        {some, erlang:element(3, Msg)},
        {some, erlang:element(4, Msg)},
        {some, erlang:element(5, Msg)},
        erlang:element(6, State),
        erlang:element(7, State),
        erlang:element(8, State),
        erlang:element(2, erlang:element(6, Msg)),
        erlang:element(10, State),
        erlang:element(11, State),
        erlang:element(12, State)}.

-file("src/anthropic/streaming/accumulator.gleam", 142).
?DOC(" Handle content_block_start event\n").
-spec handle_content_block_start(
    accumulator_state(),
    anthropic@types@streaming:content_block_start()
) -> accumulator_state().
handle_content_block_start(State, Start) ->
    Block_state = case erlang:element(3, Start) of
        {text_block, Text} ->
            {text_block_state, Text};

        {tool_use_block, Id, Name, Input} ->
            {tool_use_block_state, Id, Name, Input};

        _ ->
            {text_block_state, <<""/utf8>>}
    end,
    {accumulator_state,
        erlang:element(2, State),
        erlang:element(3, State),
        erlang:element(4, State),
        erlang:element(5, State),
        gleam@dict:insert(
            erlang:element(6, State),
            erlang:element(2, Start),
            Block_state
        ),
        erlang:element(7, State),
        erlang:element(8, State),
        erlang:element(9, State),
        erlang:element(10, State),
        erlang:element(11, State),
        erlang:element(12, State)}.

-file("src/anthropic/streaming/accumulator.gleam", 184).
?DOC(" Apply a delta to a content block state\n").
-spec apply_delta(
    content_block_state(),
    anthropic@types@streaming:content_block_delta()
) -> content_block_state().
apply_delta(Block_state, Delta) ->
    case {Block_state, Delta} of
        {{text_block_state, Text}, {text_content_delta, Text_delta}} ->
            {text_block_state,
                <<Text/binary, (erlang:element(2, Text_delta))/binary>>};

        {{tool_use_block_state, Id, Name, Input},
            {input_json_content_delta, Json_delta}} ->
            {tool_use_block_state,
                Id,
                Name,
                <<Input/binary, (erlang:element(2, Json_delta))/binary>>};

        {_, _} ->
            Block_state
    end.

-file("src/anthropic/streaming/accumulator.gleam", 160).
?DOC(" Handle content_block_delta event\n").
-spec handle_content_block_delta(
    accumulator_state(),
    anthropic@types@streaming:content_block_delta_event()
) -> accumulator_state().
handle_content_block_delta(State, Delta) ->
    Updated_blocks = case gleam_stdlib:map_get(
        erlang:element(6, State),
        erlang:element(2, Delta)
    ) of
        {ok, Block_state} ->
            New_block_state = apply_delta(Block_state, erlang:element(3, Delta)),
            gleam@dict:insert(
                erlang:element(6, State),
                erlang:element(2, Delta),
                New_block_state
            );

        {error, _} ->
            New_block_state@1 = case erlang:element(3, Delta) of
                {text_content_delta, Text_delta} ->
                    {text_block_state, erlang:element(2, Text_delta)};

                {input_json_content_delta, Json_delta} ->
                    {tool_use_block_state,
                        <<""/utf8>>,
                        <<""/utf8>>,
                        erlang:element(2, Json_delta)}
            end,
            gleam@dict:insert(
                erlang:element(6, State),
                erlang:element(2, Delta),
                New_block_state@1
            )
    end,
    {accumulator_state,
        erlang:element(2, State),
        erlang:element(3, State),
        erlang:element(4, State),
        erlang:element(5, State),
        Updated_blocks,
        erlang:element(7, State),
        erlang:element(8, State),
        erlang:element(9, State),
        erlang:element(10, State),
        erlang:element(11, State),
        erlang:element(12, State)}.

-file("src/anthropic/streaming/accumulator.gleam", 202).
?DOC(" Handle message_delta event\n").
-spec handle_message_delta(
    accumulator_state(),
    anthropic@types@streaming:message_delta_event()
) -> accumulator_state().
handle_message_delta(State, Delta) ->
    {accumulator_state,
        erlang:element(2, State),
        erlang:element(3, State),
        erlang:element(4, State),
        erlang:element(5, State),
        erlang:element(6, State),
        erlang:element(2, erlang:element(2, Delta)),
        erlang:element(3, erlang:element(2, Delta)),
        erlang:element(9, State),
        erlang:element(2, erlang:element(3, Delta)),
        erlang:element(11, State),
        erlang:element(12, State)}.

-file("src/anthropic/streaming/accumulator.gleam", 88).
?DOC(" Process a single event and update accumulator state\n").
-spec process_event(
    accumulator_state(),
    anthropic@types@streaming:stream_event()
) -> accumulator_state().
process_event(State, Event) ->
    case Event of
        {message_start_event, Msg} ->
            handle_message_start(State, Msg);

        {content_block_start_event, Start} ->
            handle_content_block_start(State, Start);

        {content_block_delta_event_variant, Delta} ->
            handle_content_block_delta(State, Delta);

        {content_block_stop_event, _} ->
            State;

        {message_delta_event_variant, Delta@1} ->
            handle_message_delta(State, Delta@1);

        message_stop_event ->
            {accumulator_state,
                erlang:element(2, State),
                erlang:element(3, State),
                erlang:element(4, State),
                erlang:element(5, State),
                erlang:element(6, State),
                erlang:element(7, State),
                erlang:element(8, State),
                erlang:element(9, State),
                erlang:element(10, State),
                true,
                erlang:element(12, State)};

        ping_event ->
            State;

        {error_event, Err} ->
            {accumulator_state,
                erlang:element(2, State),
                erlang:element(3, State),
                erlang:element(4, State),
                erlang:element(5, State),
                erlang:element(6, State),
                erlang:element(7, State),
                erlang:element(8, State),
                erlang:element(9, State),
                erlang:element(10, State),
                erlang:element(11, State),
                {some, Err}}
    end.

-file("src/anthropic/streaming/accumulator.gleam", 106).
?DOC(" Process multiple events and return final state\n").
-spec process_events(list(anthropic@types@streaming:stream_event())) -> accumulator_state().
process_events(Events) ->
    gleam@list:fold(Events, new(), fun process_event/2).

-file("src/anthropic/streaming/accumulator.gleam", 111).
?DOC(" Process events with a callback for each event\n").
-spec process_events_with_callback(
    list(anthropic@types@streaming:stream_event()),
    fun((anthropic@types@streaming:stream_event(), accumulator_state()) -> nil)
) -> accumulator_state().
process_events_with_callback(Events, Callback) ->
    gleam@list:fold(
        Events,
        new(),
        fun(State, Event) ->
            New_state = process_event(State, Event),
            Callback(Event, New_state),
            New_state
        end
    ).

-file("src/anthropic/streaming/accumulator.gleam", 244).
?DOC(" Build content blocks from accumulated state\n").
-spec build_content_blocks(gleam@dict:dict(integer(), content_block_state())) -> list(anthropic@types@message:content_block()).
build_content_blocks(Blocks) ->
    _pipe = Blocks,
    _pipe@1 = maps:to_list(_pipe),
    _pipe@2 = gleam@list:sort(
        _pipe@1,
        fun(A, B) ->
            {Index_a, _} = A,
            {Index_b, _} = B,
            case Index_a < Index_b of
                true ->
                    lt;

                false ->
                    case Index_a > Index_b of
                        true ->
                            gt;

                        false ->
                            eq
                    end
            end
        end
    ),
    gleam@list:map(
        _pipe@2,
        fun(Pair) ->
            {_, Block_state} = Pair,
            case Block_state of
                {text_block_state, Text} ->
                    {text_block, Text};

                {tool_use_block_state, Id, Name, Input} ->
                    {tool_use_block, Id, Name, Input}
            end
        end
    ).

-file("src/anthropic/streaming/accumulator.gleam", 272).
?DOC(" Helper for requiring Option values with use syntax\n").
-spec require_some(
    gleam@option:option(GTZ),
    binary(),
    fun((GTZ) -> {ok, GUB} | {error, binary()})
) -> {ok, GUB} | {error, binary()}.
require_some(Opt, Error_msg, Next) ->
    case Opt of
        {some, Value} ->
            Next(Value);

        none ->
            {error, Error_msg}
    end.

-file("src/anthropic/streaming/accumulator.gleam", 219).
?DOC(" Build a CreateMessageResponse from the accumulated state\n").
-spec build_response(accumulator_state()) -> {ok,
        anthropic@types@request:create_message_response()} |
    {error, binary()}.
build_response(State) ->
    require_some(
        erlang:element(2, State),
        <<"Missing message ID"/utf8>>,
        fun(Id) ->
            require_some(
                erlang:element(4, State),
                <<"Missing role"/utf8>>,
                fun(Role) ->
                    require_some(
                        erlang:element(5, State),
                        <<"Missing model"/utf8>>,
                        fun(Model) ->
                            Content = build_content_blocks(
                                erlang:element(6, State)
                            ),
                            {ok,
                                {create_message_response,
                                    Id,
                                    gleam@option:unwrap(
                                        erlang:element(3, State),
                                        <<"message"/utf8>>
                                    ),
                                    Role,
                                    Content,
                                    Model,
                                    erlang:element(7, State),
                                    erlang:element(8, State),
                                    {usage,
                                        erlang:element(9, State),
                                        erlang:element(10, State)}}}
                        end
                    )
                end
            )
        end
    ).

-file("src/anthropic/streaming/accumulator.gleam", 288).
?DOC(" Accumulate events and build final response\n").
-spec accumulate(list(anthropic@types@streaming:stream_event())) -> {ok,
        anthropic@types@request:create_message_response()} |
    {error, binary()}.
accumulate(Events) ->
    State = process_events(Events),
    build_response(State).

-file("src/anthropic/streaming/accumulator.gleam", 296).
?DOC(" Get the accumulated text so far\n").
-spec get_accumulated_text(accumulator_state()) -> binary().
get_accumulated_text(State) ->
    _pipe = erlang:element(6, State),
    _pipe@1 = maps:values(_pipe),
    _pipe@2 = gleam@list:filter_map(_pipe@1, fun(Block) -> case Block of
                {text_block_state, Text} ->
                    {ok, Text};

                _ ->
                    {error, nil}
            end end),
    gleam@string:join(_pipe@2, <<""/utf8>>).

-file("src/anthropic/streaming/accumulator.gleam", 309).
?DOC(" Get the accumulated tool inputs so far\n").
-spec get_accumulated_tool_inputs(accumulator_state()) -> list({binary(),
    binary(),
    binary()}).
get_accumulated_tool_inputs(State) ->
    _pipe = erlang:element(6, State),
    _pipe@1 = maps:values(_pipe),
    gleam@list:filter_map(_pipe@1, fun(Block) -> case Block of
                {tool_use_block_state, Id, Name, Input} ->
                    {ok, {Id, Name, Input}};

                _ ->
                    {error, nil}
            end end).

-file("src/anthropic/streaming/accumulator.gleam", 323).
?DOC(" Check if accumulator has any content\n").
-spec has_content(accumulator_state()) -> boolean().
has_content(State) ->
    maps:size(erlang:element(6, State)) > 0.

-file("src/anthropic/streaming/accumulator.gleam", 328).
?DOC(" Check if accumulator encountered an error\n").
-spec has_error(accumulator_state()) -> boolean().
has_error(State) ->
    gleam@option:is_some(erlang:element(12, State)).

-file("src/anthropic/streaming/accumulator.gleam", 333).
?DOC(" Get total token count\n").
-spec total_tokens(accumulator_state()) -> integer().
total_tokens(State) ->
    erlang:element(9, State) + erlang:element(10, State).