-module(stacky).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([erlang_module_name/1, gleam_module_name/1, function_name/1, function_arity/1, erlang_file_name/1, erlang_line_number/1, frame_to_string/1, print_frame_ln/1, frame/2, trace/0, main/0]).
-export_type([stack_trace/0, stack_frame/0, erlang_module_name/0, function_name/0, function_arity/0, erlang_file_name/0, erlang_line_number/0]).

-type stack_trace() :: {stack_trace, list(stack_frame())}.

-type stack_frame() :: {stack_frame,
        erlang_module_name(),
        function_name(),
        function_arity(),
        erlang_file_name(),
        erlang_line_number()}.

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

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

-type function_arity() :: {function_arity, integer()}.

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

-type erlang_line_number() :: {erlang_line_number, integer()}.

-spec erlang_module_name(stack_frame()) -> binary().
erlang_module_name(Stack_frame) ->
    {erlang_module_name, Erlang_module_name} = erlang:element(2, Stack_frame),
    Erlang_module_name.

-spec gleam_module_name(stack_frame()) -> binary().
gleam_module_name(Stack_frame) ->
    Erlang_module_name = begin
        _pipe = Stack_frame,
        erlang_module_name(_pipe)
    end,
    _assert_subject = gleam@regex:from_string(<<"@@"/utf8>>),
    {ok, Double_at_re} = case _assert_subject of
        {ok, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"stacky"/utf8>>,
                        function => <<"gleam_module_name"/utf8>>,
                        line => 86})
    end,
    _assert_subject@1 = gleam@regex:from_string(<<"@"/utf8>>),
    {ok, Single_at_re} = case _assert_subject@1 of
        {ok, _} -> _assert_subject@1;
        _assert_fail@1 ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail@1,
                        module => <<"stacky"/utf8>>,
                        function => <<"gleam_module_name"/utf8>>,
                        line => 87})
    end,
    Has_double_ats = begin
        _pipe@1 = Erlang_module_name,
        _pipe@2 = gleam@regex:scan(Double_at_re, _pipe@1),
        gleam@list:is_empty(_pipe@2)
    end
    =:= false,
    Has_ats = begin
        _pipe@3 = Erlang_module_name,
        _pipe@4 = gleam@regex:scan(Single_at_re, _pipe@3),
        gleam@list:is_empty(_pipe@4)
    end
    =:= false,
    case {Has_double_ats, Has_ats} of
        {true, _} ->
            <<Erlang_module_name/binary, " (gleam internal module)"/utf8>>;

        {false, false} ->
            Erlang_module_name;

        {false, true} ->
            _pipe@5 = Erlang_module_name,
            gleam@string:replace(_pipe@5, <<"@"/utf8>>, <<"/"/utf8>>)
    end.

-spec function_name(stack_frame()) -> binary().
function_name(Stack_frame) ->
    {function_name, Function_name} = erlang:element(3, Stack_frame),
    Function_name.

-spec function_arity(stack_frame()) -> integer().
function_arity(Stack_frame) ->
    {function_arity, Function_arity} = erlang:element(4, Stack_frame),
    Function_arity.

-spec erlang_file_name(stack_frame()) -> binary().
erlang_file_name(Stack_frame) ->
    {erlang_file_name, Erlang_file_name} = erlang:element(5, Stack_frame),
    Erlang_file_name.

-spec erlang_line_number(stack_frame()) -> integer().
erlang_line_number(Stack_frame) ->
    {erlang_line_number, Erlang_line_number} = erlang:element(6, Stack_frame),
    Erlang_line_number.

-spec frame_to_string(stack_frame()) -> binary().
frame_to_string(Stack_frame) ->
    Erlang_module_name = begin
        _pipe = Stack_frame,
        gleam_module_name(_pipe)
    end,
    Function_name = begin
        _pipe@1 = Stack_frame,
        function_name(_pipe@1)
    end,
    Function_arity = begin
        _pipe@2 = Stack_frame,
        _pipe@3 = function_arity(_pipe@2),
        gleam@int:to_string(_pipe@3)
    end,
    Erlang_file_name = begin
        _pipe@4 = Stack_frame,
        erlang_file_name(_pipe@4)
    end,
    Erlang_line_number = begin
        _pipe@5 = Stack_frame,
        _pipe@6 = erlang_line_number(_pipe@5),
        gleam@int:to_string(_pipe@6)
    end,
    <<<<<<<<<<<<<<<<Erlang_module_name/binary, "."/utf8>>/binary,
                                Function_name/binary>>/binary,
                            " - arity: "/utf8>>/binary,
                        Function_arity/binary>>/binary,
                    " - erlang file: "/utf8>>/binary,
                Erlang_file_name/binary>>/binary,
            ":"/utf8>>/binary,
        Erlang_line_number/binary>>.

-spec print_frame_ln(stack_frame()) -> nil.
print_frame_ln(Stack_frame) ->
    gleam_erlang_ffi:sleep(100),
    _pipe = Stack_frame,
    _pipe@1 = frame_to_string(_pipe),
    gleam@io:println(_pipe@1),
    gleam_erlang_ffi:sleep(100).

-spec list_at(list(GMJ), integer()) -> {ok, GMJ} | {error, nil}.
list_at(List, Index) ->
    case Index >= 0 of
        true ->
            _pipe = List,
            _pipe@1 = gleam@list:drop(_pipe, Index),
            gleam@list:first(_pipe@1);

        false ->
            {error, nil}
    end.

-spec frame(stack_trace(), integer()) -> stack_frame().
frame(Stacktrace, Index) ->
    {stack_trace, Stacktrace@1} = Stacktrace,
    case begin
        _pipe = Stacktrace@1,
        list_at(_pipe, Index)
    end of
        {ok, Stackframe} ->
            Stackframe;

        {error, _} ->
            Panic_msg = <<<<"No stack frame at index "/utf8,
                    (gleam@int:to_string(Index))/binary>>/binary,
                "."/utf8>>,
            erlang:error(#{gleam_error => panic,
                    message => Panic_msg,
                    module => <<"stacky"/utf8>>,
                    function => <<"frame"/utf8>>,
                    line => 73})
    end.

-spec trace() -> stack_trace().
trace() ->
    Erlang_stack_trace = stacky_ffi:stacky_erlang_stacktrace(),
    _pipe = Erlang_stack_trace,
    _pipe@1 = gleam@list:map(
        _pipe,
        fun(Frame) ->
            {Erlang_module_name,
                Function_name,
                Function_arity,
                Erlang_file_name,
                Erlang_line_number} = Frame,
            {stack_frame,
                {erlang_module_name, Erlang_module_name},
                {function_name, Function_name},
                {function_arity, Function_arity},
                {erlang_file_name, Erlang_file_name},
                {erlang_line_number, Erlang_line_number}}
        end
    ),
    {stack_trace, _pipe@1}.

-spec main() -> nil.
main() ->
    gleam@io:println(<<"\nFor example stack traces, run:\n"/utf8>>),
    gleam@io:println(<<"  gleam run -m stacky/internal/example\n"/utf8>>),
    gleam@io:println(<<"...or...\n"/utf8>>),
    gleam@io:println(
        <<"  gleam run -m stacky/internal/sub_dir/example_in_sub_dir\n"/utf8>>
    ).