-module(glitzer@progress).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([char_from_string/1, string_from_char/1, default_bar/0, slim_bar/0, fancy_slim_bar/0, fancy_slim_arrow_bar/0, thick_bar/0, fancy_thick_bar/0, new_bar/0, with_left_text/2, with_right_text/2, with_empty/2, with_fill/2, with_fill_finished/2, with_fill_head/2, with_fill_head_finished/2, with_length/2, tick/1, tick_by/2, finish/1, print_bar/1, map_iterator/3, map2_iterator/4, each_iterator/3]).
-export_type([char_/0, state/0, progress_style/0]).

-opaque char_() :: {char, binary()}.

-opaque state() :: {state, integer(), boolean()}.

-opaque progress_style() :: {progress_style,
        binary(),
        binary(),
        char_(),
        char_(),
        gleam@option:option(char_()),
        gleam@option:option(char_()),
        gleam@option:option(char_()),
        integer(),
        state()}.

-spec char_from_string(binary()) -> char_().
char_from_string(In) ->
    Len = gleam@string:length(In),
    case Len of
        1 ->
            {char, In};

        _ ->
            {char, <<"#"/utf8>>}
    end.

-spec string_from_char(char_()) -> binary().
string_from_char(In) ->
    erlang:element(2, In).

-spec default_bar() -> progress_style().
default_bar() ->
    {progress_style,
        <<"["/utf8>>,
        <<"]"/utf8>>,
        {char, <<" "/utf8>>},
        {char, <<"#"/utf8>>},
        none,
        none,
        none,
        100,
        {state, 0, false}}.

-spec slim_bar() -> progress_style().
slim_bar() ->
    Sym = <<"\x{2014}"/utf8>>,
    {progress_style,
        <<""/utf8>>,
        <<""/utf8>>,
        {char, <<" "/utf8>>},
        {char, Sym},
        none,
        none,
        none,
        100,
        {state, 0, false}}.

-spec fancy_slim_bar() -> progress_style().
fancy_slim_bar() ->
    Sym = <<"\x{2014}"/utf8>>,
    {progress_style,
        <<""/utf8>>,
        <<""/utf8>>,
        {char, gleam_community@ansi:blue(Sym)},
        {char, gleam_community@ansi:red(Sym)},
        {some, {char, gleam_community@ansi:green(Sym)}},
        none,
        none,
        100,
        {state, 0, false}}.

-spec fancy_slim_arrow_bar() -> progress_style().
fancy_slim_arrow_bar() ->
    Sym = <<"\x{2014}"/utf8>>,
    Sym_head = <<"\x{2192}"/utf8>>,
    {progress_style,
        <<""/utf8>>,
        <<""/utf8>>,
        {char, gleam_community@ansi:blue(Sym)},
        {char, gleam_community@ansi:red(Sym)},
        {some, {char, gleam_community@ansi:green(Sym)}},
        {some, {char, gleam_community@ansi:red(Sym_head)}},
        {some, {char, gleam_community@ansi:green(Sym_head)}},
        100,
        {state, 0, false}}.

-spec thick_bar() -> progress_style().
thick_bar() ->
    Sym = <<"\x{2588}"/utf8>>,
    Empty_sym = <<"\x{2592}"/utf8>>,
    {progress_style,
        <<""/utf8>>,
        <<""/utf8>>,
        {char, Empty_sym},
        {char, Sym},
        none,
        none,
        none,
        100,
        {state, 0, false}}.

-spec fancy_thick_bar() -> progress_style().
fancy_thick_bar() ->
    Sym = <<"\x{2588}"/utf8>>,
    Empty_sym = <<"\x{2592}"/utf8>>,
    {progress_style,
        <<""/utf8>>,
        <<""/utf8>>,
        {char, gleam_community@ansi:blue(Empty_sym)},
        {char, gleam_community@ansi:red(Sym)},
        {some, {char, gleam_community@ansi:green(Sym)}},
        none,
        none,
        100,
        {state, 0, false}}.

-spec new_bar() -> progress_style().
new_bar() ->
    {progress_style,
        <<""/utf8>>,
        <<""/utf8>>,
        {char, <<" "/utf8>>},
        {char, <<" "/utf8>>},
        none,
        none,
        none,
        0,
        {state, 0, false}}.

-spec with_left_text(progress_style(), binary()) -> progress_style().
with_left_text(Bar, Text) ->
    erlang:setelement(2, Bar, Text).

-spec with_right_text(progress_style(), binary()) -> progress_style().
with_right_text(Bar, Text) ->
    erlang:setelement(3, Bar, Text).

-spec with_empty(progress_style(), char_()) -> progress_style().
with_empty(Bar, Char) ->
    erlang:setelement(4, Bar, Char).

-spec with_fill(progress_style(), char_()) -> progress_style().
with_fill(Bar, Char) ->
    erlang:setelement(5, Bar, Char).

-spec with_fill_finished(progress_style(), char_()) -> progress_style().
with_fill_finished(Bar, Char) ->
    erlang:setelement(6, Bar, {some, Char}).

-spec with_fill_head(progress_style(), char_()) -> progress_style().
with_fill_head(Bar, Char) ->
    erlang:setelement(7, Bar, {some, Char}).

-spec with_fill_head_finished(progress_style(), char_()) -> progress_style().
with_fill_head_finished(Bar, Char) ->
    erlang:setelement(8, Bar, {some, Char}).

-spec with_length(progress_style(), integer()) -> progress_style().
with_length(Bar, Len) ->
    erlang:setelement(9, Bar, Len).

-spec tick(progress_style()) -> progress_style().
tick(Bar) ->
    case erlang:element(2, erlang:element(10, Bar)) < (erlang:element(9, Bar) + 1) of
        true ->
            erlang:setelement(
                10,
                Bar,
                erlang:setelement(
                    2,
                    erlang:element(10, Bar),
                    erlang:element(2, erlang:element(10, Bar)) + 1
                )
            );

        false ->
            erlang:setelement(
                10,
                Bar,
                {state, erlang:element(2, erlang:element(10, Bar)) + 1, true}
            )
    end.

-spec tick_by(progress_style(), integer()) -> progress_style().
tick_by(Bar, I) ->
    case I > 0 of
        true ->
            Bar@1 = tick(Bar),
            tick_by(Bar@1, I - 1);

        false ->
            Bar
    end.

-spec finish(progress_style()) -> progress_style().
finish(Bar) ->
    erlang:setelement(10, Bar, {state, erlang:element(9, Bar) + 1, true}).

-spec get_finished_head_fill(
    gleam@string_builder:string_builder(),
    progress_style()
) -> gleam@string_builder:string_builder().
get_finished_head_fill(Fill, Bar) ->
    case erlang:element(3, erlang:element(10, Bar)) of
        true ->
            gleam@string_builder:append(
                Fill,
                erlang:element(
                    2,
                    gleam@option:unwrap(
                        erlang:element(8, Bar),
                        gleam@option:unwrap(
                            erlang:element(7, Bar),
                            gleam@option:unwrap(
                                erlang:element(6, Bar),
                                erlang:element(5, Bar)
                            )
                        )
                    )
                )
            );

        false ->
            gleam@string_builder:append(
                Fill,
                erlang:element(
                    2,
                    gleam@option:unwrap(
                        erlang:element(7, Bar),
                        erlang:element(5, Bar)
                    )
                )
            )
    end.

-spec get_finished_fill(gleam@string_builder:string_builder(), progress_style()) -> gleam@string_builder:string_builder().
get_finished_fill(Fill, Bar) ->
    case erlang:element(3, erlang:element(10, Bar)) of
        true ->
            gleam@string_builder:append(
                Fill,
                erlang:element(
                    2,
                    gleam@option:unwrap(
                        erlang:element(6, Bar),
                        erlang:element(5, Bar)
                    )
                )
            );

        false ->
            gleam@string_builder:append(
                Fill,
                erlang:element(2, erlang:element(5, Bar))
            )
    end.

-spec build_progress_fill(
    gleam@string_builder:string_builder(),
    progress_style(),
    integer(),
    integer()
) -> gleam@string_builder:string_builder().
build_progress_fill(Fill, Bar, Left_nonempty, Count) ->
    Fill@1 = case Left_nonempty > 0 of
        true ->
            case Left_nonempty =:= 1 of
                true ->
                    get_finished_head_fill(Fill, Bar);

                false ->
                    get_finished_fill(Fill, Bar)
            end;

        false ->
            gleam@string_builder:append(
                Fill,
                erlang:element(2, erlang:element(4, Bar))
            )
    end,
    case erlang:element(9, Bar) > Count of
        true ->
            build_progress_fill(Fill@1, Bar, Left_nonempty - 1, Count + 1);

        false ->
            Fill@1
    end.

-spec print_bar(progress_style()) -> nil.
print_bar(Bar) ->
    Bar@1 = erlang:setelement(
        10,
        Bar,
        erlang:setelement(
            3,
            erlang:element(10, Bar),
            erlang:element(2, erlang:element(10, Bar)) >= erlang:element(9, Bar)
        )
    ),
    Fill = begin
        _pipe = build_progress_fill(
            gleam@string_builder:new(),
            Bar@1,
            erlang:element(2, erlang:element(10, Bar@1)) + 1,
            0
        ),
        gleam@string_builder:to_string(_pipe)
    end,
    End = case erlang:element(3, erlang:element(10, Bar@1)) of
        true ->
            <<"\n"/utf8>>;

        false ->
            <<""/utf8>>
    end,
    gleam@io:print_error(
        <<<<<<<<<<<<(<<"\x{001b}[?25l"/utf8>>)/binary,
                                (<<"\x{001b}[2K"/utf8>>)/binary>>/binary,
                            (<<"\r"/utf8>>)/binary>>/binary,
                        (erlang:element(2, Bar@1))/binary>>/binary,
                    Fill/binary>>/binary,
                (erlang:element(3, Bar@1))/binary>>/binary,
            End/binary>>
    ).

-spec tick_bar_by_i(progress_style(), integer()) -> progress_style().
tick_bar_by_i(Bar, I) ->
    case I > 0 of
        true ->
            tick_bar_by_i(tick(Bar), I - 1);

        false ->
            Bar
    end.

-spec map_iterator(
    gleam@iterator:iterator(MQZ),
    progress_style(),
    fun((progress_style(), MQZ) -> MRB)
) -> gleam@iterator:iterator(MRB).
map_iterator(I, Bar, Fun) ->
    _pipe = gleam@iterator:index(I),
    gleam@iterator:map(
        _pipe,
        fun(Pair) ->
            {El, I@1} = Pair,
            _pipe@1 = tick_bar_by_i(Bar, I@1),
            Fun(_pipe@1, El)
        end
    ).

-spec map2_iterator(
    gleam@iterator:iterator(MRF),
    gleam@iterator:iterator(MRH),
    progress_style(),
    fun((progress_style(), MRF, MRH) -> MRJ)
) -> gleam@iterator:iterator(MRJ).
map2_iterator(I1, I2, Bar, Fun) ->
    _pipe = gleam@iterator:zip(I1, I2),
    _pipe@1 = gleam@iterator:index(_pipe),
    gleam@iterator:map(
        _pipe@1,
        fun(Pair) ->
            {Pair@1, I} = Pair,
            {El1, El2} = Pair@1,
            _pipe@2 = tick_bar_by_i(Bar, I),
            Fun(_pipe@2, El1, El2)
        end
    ).

-spec each_iterator(
    gleam@iterator:iterator(MRL),
    progress_style(),
    fun((progress_style(), MRL) -> any())
) -> nil.
each_iterator(I, Bar, Fun) ->
    _pipe = gleam@iterator:index(I),
    gleam@iterator:each(
        _pipe,
        fun(Pair) ->
            {El, I@1} = Pair,
            _pipe@1 = tick_bar_by_i(Bar, I@1),
            Fun(_pipe@1, El)
        end
    ).