-module(squirrel@internal@eval_extra).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([run_all/2, try_fold/3, try_map/2, try_index_map/2]).

-spec run_all(list(eval:eval(SLF, SLG, SLH)), SLH) -> list({ok, SLF} |
    {error, SLG}).
run_all(List, Context) ->
    Acc = {[], Context},
    {Results@1, _} = (gleam@list:fold(
        List,
        Acc,
        fun(_use0, Script) ->
            {Results, Context@1} = _use0,
            {Context@2, Result} = eval:step(Script, Context@1),
            {[Result | Results], Context@2}
        end
    )),
    Results@1.

-spec try_fold(list(SMD), SMF, fun((SMF, SMD) -> eval:eval(SMF, SML, SMM))) -> eval:eval(SMF, SML, SMM).
try_fold(List, Acc, Fun) ->
    case List of
        [] ->
            eval:return(Acc);

        [First | Rest] ->
            eval:'try'(
                Fun(Acc, First),
                fun(Acc@1) -> try_fold(Rest, Acc@1, Fun) end
            )
    end.

-spec try_map(list(SKR), fun((SKR) -> eval:eval(SKT, SOV, SOW))) -> eval:eval(list(SKT), SOV, SOW).
try_map(List, Fun) ->
    _pipe = try_fold(
        List,
        [],
        fun(Acc, Item) ->
            eval:'try'(
                Fun(Item),
                fun(Mapped_item) -> eval:return([Mapped_item | Acc]) end
            )
        end
    ),
    eval:map(_pipe, fun lists:reverse/1).

-spec do_try_index_fold(
    integer(),
    list(SND),
    SNF,
    fun((SNF, SND, integer()) -> eval:eval(SNF, SNL, SNM))
) -> eval:eval(SNF, SNL, SNM).
do_try_index_fold(Index, List, Acc, Fun) ->
    case List of
        [] ->
            eval:return(Acc);

        [First | Rest] ->
            eval:'try'(
                Fun(Acc, First, Index),
                fun(Acc@1) -> do_try_index_fold(Index + 1, Rest, Acc@1, Fun) end
            )
    end.

-spec try_index_fold(
    list(SMQ),
    SMS,
    fun((SMS, SMQ, integer()) -> eval:eval(SMS, SMT, SMU))
) -> eval:eval(SMS, SMT, SMU).
try_index_fold(List, Acc, Fun) ->
    do_try_index_fold(0, List, Acc, Fun).

-spec try_index_map(
    list(SLP),
    fun((SLP, integer()) -> eval:eval(SLR, SQE, SQF))
) -> eval:eval(list(SLR), SQE, SQF).
try_index_map(List, Fun) ->
    _pipe = try_index_fold(
        List,
        [],
        fun(Acc, Item, I) ->
            eval:'try'(
                Fun(Item, I),
                fun(Mapped_item) -> eval:return([Mapped_item | Acc]) end
            )
        end
    ),
    eval:map(_pipe, fun lists:reverse/1).