outcome

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

-export([error_with_defect/1, error_with_failure/1, into_defect/1, into_failure/1, map_into_defect/2, map_into_failure/2, as_defect/2, as_failure/2, map_value/2, to_defect/1, to_failure/1, with_context/2, unwrap_failure/2, pretty_print/2, print_line/2]).
-export_type([error/1, problem/1]).

-type error(FWG) :: {defect, FWG} | {failure, FWG}.

-type problem(FWH) :: {problem, error(FWH), list(binary()), error(FWH)}.

-spec new_defect(FWO) -> problem(FWO).
new_defect(Value) ->
    {problem, {defect, Value}, [], {defect, Value}}.

-spec new_failure(FWQ) -> problem(FWQ).
new_failure(Value) ->
    {problem, {failure, Value}, [], {failure, Value}}.

-spec error_with_defect(FWS) -> {ok, any()} | {error, problem(FWS)}.
error_with_defect(Defect) ->
    {error, new_defect(Defect)}.

-spec error_with_failure(FWW) -> {ok, any()} | {error, problem(FWW)}.
error_with_failure(Failure) ->
    {error, new_failure(Failure)}.

-spec into_defect({ok, FXA} | {error, FXB}) -> {ok, FXA} | {error, problem(FXB)}.
into_defect(Result) ->
    gleam@result:map_error(Result, fun new_defect/1).

-spec into_failure({ok, FXG} | {error, FXH}) -> {ok, FXG} |
    {error, problem(FXH)}.
into_failure(Result) ->
    gleam@result:map_error(Result, fun new_failure/1).

-spec map_into_defect({ok, FXM} | {error, FXN}, fun((FXN) -> FXQ)) -> {ok, FXM} |
    {error, problem(FXQ)}.
map_into_defect(Result, Mapper) ->
    _pipe = Result,
    _pipe@1 = gleam@result:map_error(_pipe, Mapper),
    into_defect(_pipe@1).

-spec map_into_failure({ok, FXT} | {error, FXU}, fun((FXU) -> FXX)) -> {ok, FXT} |
    {error, problem(FXX)}.
map_into_failure(Result, Mapper) ->
    _pipe = Result,
    _pipe@1 = gleam@result:map_error(_pipe, Mapper),
    into_failure(_pipe@1).

-spec as_defect({ok, FYA} | {error, nil}, FYD) -> {ok, FYA} |
    {error, problem(FYD)}.
as_defect(Result, E) ->
    gleam@result:replace_error(Result, new_defect(E)).

-spec as_failure({ok, FYG} | {error, nil}, FYJ) -> {ok, FYG} |
    {error, problem(FYJ)}.
as_failure(Result, E) ->
    gleam@result:replace_error(Result, new_failure(E)).

-spec map_current_error_in_problem(
    problem(FYM),
    fun((error(FYM)) -> error(FYM))
) -> problem(FYM).
map_current_error_in_problem(Problem, Mapper) ->
    erlang:setelement(2, Problem, Mapper(erlang:element(2, Problem))).

-spec map_current_error(
    {ok, FYR} | {error, problem(FYS)},
    fun((error(FYS)) -> error(FYS))
) -> {ok, FYR} | {error, problem(FYS)}.
map_current_error(Outcome, Mapper) ->
    gleam@result:map_error(
        Outcome,
        fun(_capture) -> map_current_error_in_problem(_capture, Mapper) end
    ).

-spec map_current_value_in_problem(problem(FYY), fun((FYY) -> FYY)) -> problem(FYY).
map_current_value_in_problem(Problem, Mapper) ->
    map_current_error_in_problem(Problem, fun(Error) -> case Error of
                {defect, Message} ->
                    {defect, Mapper(Message)};

                {failure, Message@1} ->
                    {failure, Mapper(Message@1)}
            end end).

-spec map_value({ok, FZB} | {error, problem(FZC)}, fun((FZC) -> FZC)) -> {ok,
        FZB} |
    {error, problem(FZC)}.
map_value(Outcome, Mapper) ->
    gleam@result:map_error(
        Outcome,
        fun(_capture) -> map_current_value_in_problem(_capture, Mapper) end
    ).

-spec to_defect({ok, FZN} | {error, problem(FZO)}) -> {ok, FZN} |
    {error, problem(FZO)}.
to_defect(Outcome) ->
    map_current_error(
        Outcome,
        fun(Error) -> {defect, erlang:element(2, Error)} end
    ).

-spec to_failure({ok, FZT} | {error, problem(FZU)}) -> {ok, FZT} |
    {error, problem(FZU)}.
to_failure(Outcome) ->
    map_current_error(
        Outcome,
        fun(Error) -> {failure, erlang:element(2, Error)} end
    ).

-spec push_to_stack(list(binary()), binary()) -> list(binary()).
push_to_stack(Stack, Entry) ->
    [Entry | Stack].

-spec add_context_to_problem(problem(GAA), binary()) -> problem(GAA).
add_context_to_problem(Problem, Value) ->
    erlang:setelement(
        3,
        Problem,
        push_to_stack(erlang:element(3, Problem), Value)
    ).

-spec with_context({ok, FZH} | {error, problem(FZI)}, binary()) -> {ok, FZH} |
    {error, problem(FZI)}.
with_context(Outcome, Context) ->
    gleam@result:map_error(
        Outcome,
        fun(_capture) -> add_context_to_problem(_capture, Context) end
    ).

-spec unwrap_failure(problem(GAD), GAD) -> GAD.
unwrap_failure(Problem, Default_value) ->
    case erlang:element(2, Problem) of
        {defect, _} ->
            Default_value;

        {failure, Value} ->
            Value
    end.

-spec long_suffix(error(any())) -> binary().
long_suffix(Error) ->
    case Error of
        {defect, _} ->
            <<"Defect: "/utf8>>;

        {failure, _} ->
            <<"Failure: "/utf8>>
    end.

-spec short_suffix(error(any())) -> binary().
short_suffix(Error) ->
    case Error of
        {defect, _} ->
            <<"d: "/utf8>>;

        {failure, _} ->
            <<"f: "/utf8>>
    end.

-spec prettry_print_error(binary(), error(GAU), fun((GAU) -> binary())) -> binary().
prettry_print_error(Suffix, Error, To_s) ->
    <<Suffix/binary, (To_s(erlang:element(2, Error)))/binary>>.

-spec prettry_print_problem_error(problem(GAM), fun((GAM) -> binary())) -> binary().
prettry_print_problem_error(Problem, To_s) ->
    prettry_print_error(
        long_suffix(erlang:element(2, Problem)),
        erlang:element(2, Problem),
        To_s
    ).

-spec prettry_print_problem_original(problem(GAQ), fun((GAQ) -> binary())) -> binary().
prettry_print_problem_original(Problem, To_s) ->
    prettry_print_error(
        short_suffix(erlang:element(2, Problem)),
        erlang:element(4, Problem),
        To_s
    ).

-spec pretty_print_stack_entry(binary()) -> binary().
pretty_print_stack_entry(Value) ->
    <<"c: "/utf8, Value/binary>>.

-spec stack_to_lines(list(binary())) -> list(binary()).
stack_to_lines(Stack) ->
    _pipe = Stack,
    gleam@list:map(_pipe, fun pretty_print_stack_entry/1).

-spec pretty_print_with_joins(
    problem(GAK),
    binary(),
    binary(),
    fun((GAK) -> binary())
) -> binary().
pretty_print_with_joins(Problem, Join_current, Join_stack, To_s) ->
    Current = prettry_print_problem_error(Problem, To_s),
    Stack = begin
        _pipe = erlang:element(3, Problem),
        _pipe@1 = stack_to_lines(_pipe),
        gleam@string:join(_pipe@1, Join_stack)
    end,
    Original = prettry_print_problem_original(Problem, To_s),
    <<<<<<<<Current/binary, Join_current/binary>>/binary, Stack/binary>>/binary,
            Join_stack/binary>>/binary,
        Original/binary>>.

-spec pretty_print(problem(GAG), fun((GAG) -> binary())) -> binary().
pretty_print(Problem, To_s) ->
    pretty_print_with_joins(
        Problem,
        <<"\n\nstack:\n  "/utf8>>,
        <<"\n  "/utf8>>,
        To_s
    ).

-spec print_line(problem(GAI), fun((GAI) -> binary())) -> binary().
print_line(Problem, To_s) ->
    pretty_print_with_joins(Problem, <<" << "/utf8>>, <<" < "/utf8>>, To_s).