-module(utils@csv).
-compile(no_auto_import).

-export([iterator_of_hmaps/1]).

-spec lines(binary()) -> list(binary()).
lines(S) ->
    gleam@string:split(S, <<"\n"/utf8>>).

-spec cells(binary()) -> list(binary()).
cells(S) ->
    gleam@string:split(S, <<","/utf8>>).

-spec hmap(list(binary()), binary()) -> gleam@map:map_(binary(), binary()).
hmap(Headers, Line) ->
    Values = cells(Line),
    gleam@map:from_list(gleam@list:zip(Headers, Values)).

-spec iterator_of_hmaps(binary()) -> gleam@iterator:iterator(gleam@map:map_(binary(), binary())).
iterator_of_hmaps(S) ->
    {[First_line], Rest_lines} = gleam@list:split(lines(S), 1),
    Headers = cells(First_line),
    gleam@iterator:from_list(
        gleam@list:map(Rest_lines, fun(Line) -> hmap(Headers, Line) end)
    ).