-module(glubs@srt).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([to_string/1, parse/1]).
-export_type([srt/0, cue/0]).

-type srt() :: {srt, list(cue())}.

-type cue() :: {cue, integer(), integer(), integer(), binary()}.

-spec cue_to_string(cue()) -> gleam@string_builder:string_builder().
cue_to_string(Cue) ->
    Start_time = glubs@internal@timestamp:to_string(
        erlang:element(3, Cue),
        <<","/utf8>>
    ),
    End_time = glubs@internal@timestamp:to_string(
        erlang:element(4, Cue),
        <<","/utf8>>
    ),
    _pipe@2 = [gleam@string_builder:from_string(
            gleam@int:to_string(erlang:element(2, Cue))
        ),
        begin
            _pipe = Start_time,
            _pipe@1 = gleam@string_builder:append(_pipe, <<" --> "/utf8>>),
            gleam@string_builder:append_builder(_pipe@1, End_time)
        end,
        gleam@string_builder:from_string(erlang:element(5, Cue))],
    gleam@string_builder:join(_pipe@2, <<"\n"/utf8>>).

-spec to_string(srt()) -> binary().
to_string(Srt) ->
    _pipe = erlang:element(2, Srt),
    _pipe@1 = gleam@list:map(_pipe, fun cue_to_string/1),
    _pipe@2 = gleam@string_builder:join(_pipe@1, <<"\n\n"/utf8>>),
    _pipe@3 = gleam@string_builder:append(_pipe@2, <<"\n"/utf8>>),
    gleam@string_builder:to_string(_pipe@3).

-spec parse_cue(binary()) -> {ok, cue()} | {error, binary()}.
parse_cue(Input) ->
    _assert_subject = gleam@string:split(Input, <<"\n"/utf8>>),
    [Id, Ts | Lines] = case _assert_subject of
        [_, _ | _] -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"glubs/srt"/utf8>>,
                        function => <<"parse_cue"/utf8>>,
                        line => 51})
    end,
    gleam@result:'try'(
        begin
            _pipe = Id,
            _pipe@1 = gleam@int:parse(_pipe),
            gleam@result:replace_error(
                _pipe@1,
                <<"Cannot parse identifier"/utf8>>
            )
        end,
        fun(Id@1) ->
            gleam@result:'try'(
                glubs@internal@timestamp:parse_range(Ts, <<","/utf8>>),
                fun(_use0) ->
                    {Start_time, End_time, _} = _use0,
                    {ok,
                        {cue,
                            Id@1,
                            Start_time,
                            End_time,
                            gleam@string:join(Lines, <<"\n"/utf8>>)}}
                end
            )
        end
    ).

-spec parse(binary()) -> {ok, srt()} | {error, binary()}.
parse(Input) ->
    _pipe = Input,
    _pipe@1 = gleam@string:replace(_pipe, <<"\r\n"/utf8>>, <<"\n"/utf8>>),
    _pipe@2 = gleam@string:trim_right(_pipe@1),
    _pipe@3 = gleam@string:split(_pipe@2, <<"\n\n"/utf8>>),
    _pipe@4 = gleam@list:try_map(_pipe@3, fun parse_cue/1),
    gleam@result:map(_pipe@4, fun(_capture) -> {srt, _capture} end).