-module(glean@run).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/glean/run.gleam").
-export([stream/4, generate/3, generate_messages/3, continue/4]).
-export_type([run_result/0, step_result/0, run_state/1, pending_tool_call/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 run_result() :: {run_result,
        binary(),
        list(glean@message:message()),
        list(glean@provider:generated_content()),
        glean@stream:usage(),
        glean@error:finish_reason(),
        integer(),
        list(step_result())}.

-type step_result() :: {step_result,
        integer(),
        list(glean@provider:generated_content()),
        glean@error:finish_reason(),
        glean@stream:usage()}.

-type run_state(LGE) :: {run_state,
        glean@agent:agent(LGE),
        LGE,
        list(glean@message:message()),
        integer(),
        glean@stream:usage(),
        list(step_result())}.

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

-file("src/glean/run.gleam", 134).
-spec build_initial_messages(glean@agent:agent(any()), binary()) -> list(glean@message:message()).
build_initial_messages(Agent, Prompt) ->
    System_msgs = begin
        _pipe = erlang:element(3, Agent),
        gleam@list:map(_pipe, fun glean@message:system/1)
    end,
    lists:append(System_msgs, [glean@message:user(Prompt)]).

-file("src/glean/run.gleam", 142).
-spec prepend_system_prompts(
    glean@agent:agent(any()),
    list(glean@message:message())
) -> list(glean@message:message()).
prepend_system_prompts(Agent, Messages) ->
    System_msgs = begin
        _pipe = erlang:element(3, Agent),
        gleam@list:map(_pipe, fun glean@message:system/1)
    end,
    lists:append(System_msgs, Messages).

-file("src/glean/run.gleam", 385).
-spec extract_tool_calls(list(glean@provider:generated_content())) -> list(pending_tool_call()).
extract_tool_calls(Content) ->
    gleam@list:filter_map(Content, fun(C) -> case C of
                {generated_tool_call, Id, Name, Args} ->
                    {ok, {pending_tool_call, Id, Name, Args}};

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

-file("src/glean/run.gleam", 399).
-spec extract_text(list(glean@provider:generated_content())) -> binary().
extract_text(Content) ->
    _pipe = Content,
    _pipe@1 = gleam@list:filter_map(_pipe, fun(C) -> case C of
                {generated_text, Text} ->
                    {ok, Text};

                _ ->
                    {error, nil}
            end end),
    gleam@list:fold(
        _pipe@1,
        <<""/utf8>>,
        fun(Acc, Text@1) -> <<Acc/binary, Text@1/binary>> end
    ).

-file("src/glean/run.gleam", 548).
-spec tool_error_to_string(glean@error:glean_error()) -> binary().
tool_error_to_string(Err) ->
    case Err of
        {tool_execution_error, _, _, Reason} ->
            Reason;

        {tool_input_validation_error, _, _, Errors} ->
            _pipe = Errors,
            _pipe@1 = gleam@list:map(_pipe, fun(E) -> erlang:element(3, E) end),
            gleam@list:fold(
                _pipe@1,
                <<"Validation errors: "/utf8>>,
                fun(Acc, Msg) ->
                    <<<<Acc/binary, Msg/binary>>/binary, "; "/utf8>>
                end
            );

        _ ->
            <<"Tool execution failed"/utf8>>
    end.

-file("src/glean/run.gleam", 492).
-spec execute_tool_with_retry(
    run_state(LJA),
    pending_tool_call(),
    glean@tool:tool(LJA),
    integer()
) -> {ok, glean@message:tool_result()} | {error, glean@error:glean_error()}.
execute_tool_with_retry(State, Call, Found_tool, Attempt) ->
    Ctx = {tool_context,
        erlang:element(3, State),
        erlang:element(2, Call),
        erlang:element(3, Call),
        Attempt,
        erlang:element(6, Found_tool),
        erlang:element(5, State)},
    case (erlang:element(5, Found_tool))(Ctx, erlang:element(4, Call)) of
        {ok, Output} ->
            {ok,
                {tool_result_ok,
                    erlang:element(2, Call),
                    erlang:element(3, Call),
                    Output}};

        {error, Tool_err} ->
            case Attempt < erlang:element(6, Found_tool) of
                true ->
                    case Tool_err of
                        {tool_not_found, _} ->
                            {ok,
                                {tool_result_error,
                                    erlang:element(2, Call),
                                    erlang:element(3, Call),
                                    tool_error_to_string(Tool_err)}};

                        _ ->
                            execute_tool_with_retry(
                                State,
                                Call,
                                Found_tool,
                                Attempt + 1
                            )
                    end;

                false ->
                    {ok,
                        {tool_result_error,
                            erlang:element(2, Call),
                            erlang:element(3, Call),
                            tool_error_to_string(Tool_err)}}
            end
    end.

-file("src/glean/run.gleam", 481).
-spec execute_single_tool(run_state(any()), pending_tool_call()) -> {ok,
        glean@message:tool_result()} |
    {error, glean@error:glean_error()}.
execute_single_tool(State, Call) ->
    case glean@tool:find(
        erlang:element(4, erlang:element(2, State)),
        erlang:element(3, Call)
    ) of
        {error, Err} ->
            {error, Err};

        {ok, Found_tool} ->
            execute_tool_with_retry(State, Call, Found_tool, 0)
    end.

-file("src/glean/run.gleam", 417).
-spec execute_tool_calls_loop(
    run_state(any()),
    list(pending_tool_call()),
    list(glean@message:tool_result())
) -> {ok, list(glean@message:tool_result())} |
    {error, glean@error:glean_error()}.
execute_tool_calls_loop(State, Calls, Results) ->
    case Calls of
        [] ->
            {ok, lists:reverse(Results)};

        [Call | Rest] ->
            case execute_single_tool(State, Call) of
                {error, Err} ->
                    {error, Err};

                {ok, Result} ->
                    execute_tool_calls_loop(State, Rest, [Result | Results])
            end
    end.

-file("src/glean/run.gleam", 410).
-spec execute_tool_calls(run_state(any()), list(pending_tool_call())) -> {ok,
        list(glean@message:tool_result())} |
    {error, glean@error:glean_error()}.
execute_tool_calls(State, Calls) ->
    execute_tool_calls_loop(State, Calls, []).

-file("src/glean/run.gleam", 183).
-spec process_generate_result(
    run_state(any()),
    glean@provider:generate_result()
) -> {ok, run_result()} | {error, glean@error:glean_error()}.
process_generate_result(State, Result) ->
    Step_result = {step_result,
        erlang:element(5, State),
        erlang:element(2, Result),
        erlang:element(3, Result),
        erlang:element(4, Result)},
    New_usage = glean@stream:add_usage(
        erlang:element(6, State),
        erlang:element(4, Result)
    ),
    New_step_results = lists:append(erlang:element(7, State), [Step_result]),
    Tool_calls = extract_tool_calls(erlang:element(2, Result)),
    case Tool_calls of
        [] ->
            Text = extract_text(erlang:element(2, Result)),
            {ok,
                {run_result,
                    Text,
                    erlang:element(4, State),
                    erlang:element(2, Result),
                    New_usage,
                    erlang:element(3, Result),
                    erlang:element(5, State) + 1,
                    New_step_results}};

        _ ->
            Assistant_content = begin
                _pipe = erlang:element(2, Result),
                gleam@list:map(_pipe, fun(C) -> case C of
                            {generated_tool_call, Id, Name, Args} ->
                                {assistant_tool_call, Id, Name, Args};

                            {generated_text, Text@1} ->
                                {assistant_text, Text@1};

                            {generated_reasoning, Text@2} ->
                                {assistant_reasoning, Text@2}
                        end end)
            end,
            Messages_with_assistant = lists:append(
                erlang:element(4, State),
                [{assistant_message, Assistant_content}]
            ),
            case execute_tool_calls(State, Tool_calls) of
                {error, Err} ->
                    {error, Err};

                {ok, Tool_results} ->
                    Messages_with_results = lists:append(
                        Messages_with_assistant,
                        [{tool_result_message, Tool_results}]
                    ),
                    run_loop(
                        {run_state,
                            erlang:element(2, State),
                            erlang:element(3, State),
                            Messages_with_results,
                            erlang:element(5, State) + 1,
                            New_usage,
                            New_step_results}
                    )
            end
    end.

-file("src/glean/run.gleam", 155).
-spec run_loop(run_state(any())) -> {ok, run_result()} |
    {error, glean@error:glean_error()}.
run_loop(State) ->
    case erlang:element(5, State) >= erlang:element(7, erlang:element(2, State)) of
        true ->
            {error,
                {max_steps_exceeded,
                    erlang:element(7, erlang:element(2, State)),
                    erlang:element(5, State)}};

        false ->
            Request = {generate_request,
                erlang:element(4, State),
                erlang:element(5, erlang:element(2, State)),
                glean@tool:to_specs(erlang:element(4, erlang:element(2, State))),
                erlang:element(6, erlang:element(2, State)),
                text_format},
            case (erlang:element(4, erlang:element(2, erlang:element(2, State))))(
                Request
            ) of
                {error, Err} ->
                    {error, Err};

                {ok, Result} ->
                    process_generate_result(State, Result)
            end
    end.

-file("src/glean/run.gleam", 263).
-spec run_stream_loop(
    run_state(any()),
    fun((glean@stream:stream_event()) -> nil)
) -> {ok, run_result()} | {error, glean@error:glean_error()}.
run_stream_loop(State, On_event) ->
    case erlang:element(5, State) >= erlang:element(7, erlang:element(2, State)) of
        true ->
            {error,
                {max_steps_exceeded,
                    erlang:element(7, erlang:element(2, State)),
                    erlang:element(5, State)}};

        false ->
            On_event({step_start, erlang:element(5, State)}),
            Request = {generate_request,
                erlang:element(4, State),
                erlang:element(5, erlang:element(2, State)),
                glean@tool:to_specs(erlang:element(4, erlang:element(2, State))),
                erlang:element(6, erlang:element(2, State)),
                text_format},
            case (erlang:element(5, erlang:element(2, erlang:element(2, State))))(
                Request,
                On_event
            ) of
                {error, Err} ->
                    {error, Err};

                {ok, Result} ->
                    On_event({step_end, erlang:element(5, State)}),
                    process_stream_result(State, Result, On_event)
            end
    end.

-file("src/glean/run.gleam", 296).
-spec process_stream_result(
    run_state(any()),
    glean@provider:generate_result(),
    fun((glean@stream:stream_event()) -> nil)
) -> {ok, run_result()} | {error, glean@error:glean_error()}.
process_stream_result(State, Result, On_event) ->
    Step_result = {step_result,
        erlang:element(5, State),
        erlang:element(2, Result),
        erlang:element(3, Result),
        erlang:element(4, Result)},
    New_usage = glean@stream:add_usage(
        erlang:element(6, State),
        erlang:element(4, Result)
    ),
    New_step_results = lists:append(erlang:element(7, State), [Step_result]),
    Tool_calls = extract_tool_calls(erlang:element(2, Result)),
    case Tool_calls of
        [] ->
            Text = extract_text(erlang:element(2, Result)),
            On_event({finish, erlang:element(3, Result), New_usage}),
            {ok,
                {run_result,
                    Text,
                    erlang:element(4, State),
                    erlang:element(2, Result),
                    New_usage,
                    erlang:element(3, Result),
                    erlang:element(5, State) + 1,
                    New_step_results}};

        _ ->
            Assistant_content = begin
                _pipe = erlang:element(2, Result),
                gleam@list:map(_pipe, fun(C) -> case C of
                            {generated_tool_call, Id, Name, Args} ->
                                {assistant_tool_call, Id, Name, Args};

                            {generated_text, Text@1} ->
                                {assistant_text, Text@1};

                            {generated_reasoning, Text@2} ->
                                {assistant_reasoning, Text@2}
                        end end)
            end,
            Messages_with_assistant = lists:append(
                erlang:element(4, State),
                [{assistant_message, Assistant_content}]
            ),
            case execute_tool_calls_with_events(State, Tool_calls, On_event) of
                {error, Err} ->
                    {error, Err};

                {ok, Tool_results} ->
                    Messages_with_results = lists:append(
                        Messages_with_assistant,
                        [{tool_result_message, Tool_results}]
                    ),
                    run_stream_loop(
                        {run_state,
                            erlang:element(2, State),
                            erlang:element(3, State),
                            Messages_with_results,
                            erlang:element(5, State) + 1,
                            New_usage,
                            New_step_results},
                        On_event
                    )
            end
    end.

-file("src/glean/run.gleam", 434).
-spec execute_tool_calls_with_events(
    run_state(any()),
    list(pending_tool_call()),
    fun((glean@stream:stream_event()) -> nil)
) -> {ok, list(glean@message:tool_result())} |
    {error, glean@error:glean_error()}.
execute_tool_calls_with_events(State, Calls, On_event) ->
    execute_tool_calls_with_events_loop(State, Calls, [], On_event).

-file("src/glean/run.gleam", 442).
-spec execute_tool_calls_with_events_loop(
    run_state(any()),
    list(pending_tool_call()),
    list(glean@message:tool_result()),
    fun((glean@stream:stream_event()) -> nil)
) -> {ok, list(glean@message:tool_result())} |
    {error, glean@error:glean_error()}.
execute_tool_calls_with_events_loop(State, Calls, Results, On_event) ->
    case Calls of
        [] ->
            {ok, lists:reverse(Results)};

        [Call | Rest] ->
            case execute_single_tool(State, Call) of
                {error, Err} ->
                    {error, Err};

                {ok, Result} ->
                    case Result of
                        {tool_result_ok, Tool_call_id, Tool_name, Output} ->
                            On_event(
                                {tool_result_event,
                                    Tool_call_id,
                                    Tool_name,
                                    Output}
                            );

                        {tool_result_error,
                            Tool_call_id@1,
                            Tool_name@1,
                            Error_message} ->
                            On_event(
                                {tool_error_event,
                                    Tool_call_id@1,
                                    Tool_name@1,
                                    Error_message}
                            )
                    end,
                    execute_tool_calls_with_events_loop(
                        State,
                        Rest,
                        [Result | Results],
                        On_event
                    )
            end
    end.

-file("src/glean/run.gleam", 94).
?DOC(" Run the agent with streaming. Calls on_event for each StreamEvent.\n").
-spec stream(
    glean@agent:agent(LGO),
    LGO,
    binary(),
    fun((glean@stream:stream_event()) -> nil)
) -> {ok, run_result()} | {error, glean@error:glean_error()}.
stream(Agent, Deps, Prompt, On_event) ->
    Messages = build_initial_messages(Agent, Prompt),
    run_stream_loop(
        {run_state, Agent, Deps, Messages, 0, glean@stream:zero_usage(), []},
        On_event
    ).

-file("src/glean/run.gleam", 60).
?DOC(" Run the agent with a simple text prompt.\n").
-spec generate(glean@agent:agent(LGF), LGF, binary()) -> {ok, run_result()} |
    {error, glean@error:glean_error()}.
generate(Agent, Deps, Prompt) ->
    Messages = build_initial_messages(Agent, Prompt),
    run_loop(
        {run_state, Agent, Deps, Messages, 0, glean@stream:zero_usage(), []}
    ).

-file("src/glean/run.gleam", 77).
?DOC(" Run the agent with pre-built messages (for multi-turn conversations).\n").
-spec generate_messages(
    glean@agent:agent(LGJ),
    LGJ,
    list(glean@message:message())
) -> {ok, run_result()} | {error, glean@error:glean_error()}.
generate_messages(Agent, Deps, Messages) ->
    Messages@1 = prepend_system_prompts(Agent, Messages),
    run_loop(
        {run_state, Agent, Deps, Messages@1, 0, glean@stream:zero_usage(), []}
    ).

-file("src/glean/run.gleam", 115).
?DOC(" Continue a previous run with additional user input.\n").
-spec continue(glean@agent:agent(LGS), LGS, run_result(), binary()) -> {ok,
        run_result()} |
    {error, glean@error:glean_error()}.
continue(Agent, Deps, Previous, Prompt) ->
    Messages = lists:append(
        erlang:element(3, Previous),
        [glean@message:user(Prompt)]
    ),
    run_loop(
        {run_state, Agent, Deps, Messages, 0, glean@stream:zero_usage(), []}
    ).