-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(SKT, SKU, SKV)), SKV) -> list({ok, SKT} |
    {error, SKU}).
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(SLR), SLT, fun((SLT, SLR) -> eval:eval(SLT, SLZ, SMA))) -> eval:eval(SLT, SLZ, SMA).
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(SKF), fun((SKF) -> eval:eval(SKH, SOJ, SOK))) -> eval:eval(list(SKH), SOJ, SOK).
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(SMR),
    SMT,
    fun((SMT, SMR, integer()) -> eval:eval(SMT, SMZ, SNA))
) -> eval:eval(SMT, SMZ, SNA).
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(SME),
    SMG,
    fun((SMG, SME, integer()) -> eval:eval(SMG, SMH, SMI))
) -> eval:eval(SMG, SMH, SMI).
try_index_fold(List, Acc, Fun) ->
    do_try_index_fold(0, List, Acc, Fun).

-spec try_index_map(
    list(SLD),
    fun((SLD, integer()) -> eval:eval(SLF, SPS, SPT))
) -> eval:eval(list(SLF), SPS, SPT).
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).