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

-export([prepare/1, run/3]).
-export_type([template/0]).

-opaque template() :: {template, list(handles@internal@parser:ast())}.

-spec prepare(binary()) -> {ok, template()} |
    {error, handles@error:tokenizer_error()}.
prepare(Template) ->
    _pipe = handles@internal@tokenizer:run(Template, 0, []),
    gleam@result:map(
        _pipe,
        fun(Tokens) ->
            Ast = handles@internal@parser:run(Tokens, []),
            {template, Ast}
        end
    ).

-spec run(template(), handles@ctx:value(), list({binary(), template()})) -> {ok,
        binary()} |
    {error, handles@error:runtime_error()}.
run(Template, Ctx, Partials) ->
    {template, Ast} = Template,
    Partials_dict = begin
        _pipe = Partials,
        _pipe@1 = maps:from_list(_pipe),
        gleam@dict:map_values(
            _pipe@1,
            fun(_, Template@1) ->
                {template, Ast@1} = Template@1,
                Ast@1
            end
        )
    end,
    handles@internal@engine:run(
        Ast,
        Ctx,
        Partials_dict,
        gleam@string_builder:new()
    ).