-module(examples@snake).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/examples/snake.gleam").
-export([main/0]).
-export_type([direction/0, state/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

?MODULEDOC(false).

-type direction() :: up | down | left | right.

-type state() :: {state,
        gleam@dict:dict(integer(), integer()),
        list(integer()),
        integer(),
        integer(),
        direction(),
        integer()}.

-file("src/examples/snake.gleam", 85).
?DOC(false).
-spec make_grid(integer(), integer()) -> gleam@dict:dict(integer(), integer()).
make_grid(Columns, Rows) ->
    X = begin
        _pipe = gleam@list:range(0, Columns * Rows),
        gleam@list:zip(_pipe, gleam@list:repeat(0, Columns * Rows))
    end,
    D = maps:from_list(X),
    case gleam@int:is_even(Rows) of
        true ->
            gleam@dict:insert(D, ((Rows * Columns) div 2) + (Columns div 2), 1);

        false ->
            gleam@dict:insert(D, (Rows * Columns) div 2, 1)
    end.

-file("src/examples/snake.gleam", 110).
?DOC(false).
-spec handle_input(state()) -> state().
handle_input(State) ->
    case {event_ffi:poll(1), erlang:element(6, State)} of
        {{some, {ok, {key, K}}}, down} when (erlang:element(2, K) =:= {char,
            <<"w"/utf8>>}) orelse (erlang:element(2, K) =:= up_arrow) ->
            State;

        {{some, {ok, {key, K@1}}}, _} when (erlang:element(2, K@1) =:= {char,
            <<"w"/utf8>>}) orelse (erlang:element(2, K@1) =:= up_arrow) ->
            {state,
                erlang:element(2, State),
                erlang:element(3, State),
                erlang:element(4, State),
                erlang:element(5, State),
                up,
                erlang:element(7, State)};

        {{some, {ok, {key, K@2}}}, right} when (erlang:element(2, K@2) =:= {char,
            <<"a"/utf8>>}) orelse (erlang:element(2, K@2) =:= left_arrow) ->
            State;

        {{some, {ok, {key, K@3}}}, _} when (erlang:element(2, K@3) =:= {char,
            <<"a"/utf8>>}) orelse (erlang:element(2, K@3) =:= left_arrow) ->
            {state,
                erlang:element(2, State),
                erlang:element(3, State),
                erlang:element(4, State),
                erlang:element(5, State),
                left,
                erlang:element(7, State)};

        {{some, {ok, {key, K@4}}}, up} when (erlang:element(2, K@4) =:= {char,
            <<"s"/utf8>>}) orelse (erlang:element(2, K@4) =:= down_arrow) ->
            State;

        {{some, {ok, {key, K@5}}}, _} when (erlang:element(2, K@5) =:= {char,
            <<"s"/utf8>>}) orelse (erlang:element(2, K@5) =:= down_arrow) ->
            {state,
                erlang:element(2, State),
                erlang:element(3, State),
                erlang:element(4, State),
                erlang:element(5, State),
                down,
                erlang:element(7, State)};

        {{some, {ok, {key, K@6}}}, left} when (erlang:element(2, K@6) =:= {char,
            <<"d"/utf8>>}) orelse (erlang:element(2, K@6) =:= right_arrow) ->
            State;

        {{some, {ok, {key, K@7}}}, _} when (erlang:element(2, K@7) =:= {char,
            <<"d"/utf8>>}) orelse (erlang:element(2, K@7) =:= right_arrow) ->
            {state,
                erlang:element(2, State),
                erlang:element(3, State),
                erlang:element(4, State),
                erlang:element(5, State),
                right,
                erlang:element(7, State)};

        {{some, _}, _} ->
            State;

        {none, _} ->
            State
    end.

-file("src/examples/snake.gleam", 242).
?DOC(false).
-spec spawn_fruit(state()) -> state().
spawn_fruit(State) ->
    F = gleam@int:random(erlang:element(4, State) * erlang:element(5, State)),
    case gleam_stdlib:map_get(erlang:element(2, State), F) of
        {ok, 1} ->
            spawn_fruit(State);

        {ok, 0} ->
            Grid = gleam@dict:insert(erlang:element(2, State), F, 2),
            {state,
                Grid,
                erlang:element(3, State),
                erlang:element(4, State),
                erlang:element(5, State),
                erlang:element(6, State),
                erlang:element(7, State)};

        _ ->
            erlang:error(#{gleam_error => panic,
                    message => <<"Unreachable"/utf8>>,
                    file => <<?FILEPATH/utf8>>,
                    module => <<"examples/snake"/utf8>>,
                    function => <<"spawn_fruit"/utf8>>,
                    line => 253})
    end.

-file("src/examples/snake.gleam", 257).
?DOC(false).
-spec remove_last_snake_block(state(), integer()) -> state().
remove_last_snake_block(State, New_head) ->
    Snake = begin
        _pipe = [New_head | erlang:element(3, State)],
        lists:reverse(_pipe)
    end,
    {Last@1, Snake@1} = case Snake of
        [Last | Rest] ->
            {Last, Rest};

        _ ->
            erlang:error(#{gleam_error => panic,
                    message => <<"Unreachable"/utf8>>,
                    file => <<?FILEPATH/utf8>>,
                    module => <<"examples/snake"/utf8>>,
                    function => <<"remove_last_snake_block"/utf8>>,
                    line => 264})
    end,
    Grid = gleam@dict:insert(erlang:element(2, State), Last@1, 0),
    Grid@1 = gleam@dict:insert(Grid, New_head, 1),
    Snake@2 = lists:reverse(Snake@1),
    {state,
        Grid@1,
        Snake@2,
        erlang:element(4, State),
        erlang:element(5, State),
        erlang:element(6, State),
        erlang:element(7, State)}.

-file("src/examples/snake.gleam", 348).
?DOC(false).
-spec colorize_line(binary(), integer()) -> binary().
colorize_line(Str, Offset) ->
    _pipe = gleam@string:to_graphemes(Str),
    _pipe@1 = gleam@list:index_map(
        _pipe,
        fun(Ch, I) ->
            Bg = case (I + Offset) rem 2 of
                0 ->
                    {ansi_value, 254};

                1 ->
                    {ansi_value, 188};

                _ ->
                    erlang:error(#{gleam_error => panic,
                            message => <<"Unreachable"/utf8>>,
                            file => <<?FILEPATH/utf8>>,
                            module => <<"examples/snake"/utf8>>,
                            function => <<"colorize_line"/utf8>>,
                            line => 355})
            end,
            case Ch of
                <<"@"/utf8>> ->
                    etch@style:with_on(Ch, bright_green, Bg);

                <<"$"/utf8>> ->
                    etch@style:with_on(Ch, red, Bg);

                _ ->
                    etch@style:with_on(Ch, default, Bg)
            end
        end
    ),
    gleam@string:join(_pipe@1, <<""/utf8>>).

-file("src/examples/snake.gleam", 342).
?DOC(false).
-spec colorize(list(binary())) -> list(etch@command:command()).
colorize(Strings) ->
    gleam@list:index_map(
        Strings,
        fun(Str, I) -> {println, colorize_line(Str, I rem 2)} end
    ).

-file("src/examples/snake.gleam", 272).
?DOC(false).
-spec draw(state()) -> etch@stdout:queue().
draw(State) ->
    L = maps:to_list(erlang:element(2, State)),
    L@1 = gleam@list:sort(
        L,
        fun(X, Y) ->
            gleam@int:compare(erlang:element(1, X), erlang:element(1, Y))
        end
    ),
    Q = {queue, [{move_to, 0, 0}]},
    Strings = gleam@list:fold(
        L@1,
        {[], gleam@string_tree:new()},
        fun(S, Cell) -> case Cell of
                {Pos, 0} when (Pos rem erlang:element(5, State)) =:= (erlang:element(
                    5,
                    State
                ) - 1) ->
                    {[begin
                                _pipe = gleam@string_tree:append(
                                    erlang:element(2, S),
                                    <<" │"/utf8>>
                                ),
                                unicode:characters_to_binary(_pipe)
                            end |
                            erlang:element(1, S)],
                        gleam@string_tree:new()};

                {Pos@1, 1} when (Pos@1 rem erlang:element(5, State)) =:= (erlang:element(
                    5,
                    State
                ) - 1) ->
                    {[begin
                                _pipe@1 = gleam@string_tree:append(
                                    erlang:element(2, S),
                                    <<"@│"/utf8>>
                                ),
                                unicode:characters_to_binary(_pipe@1)
                            end |
                            erlang:element(1, S)],
                        gleam@string_tree:new()};

                {Pos@2, 2} when (Pos@2 rem erlang:element(5, State)) =:= (erlang:element(
                    5,
                    State
                ) - 1) ->
                    {[begin
                                _pipe@2 = gleam@string_tree:append(
                                    erlang:element(2, S),
                                    <<"$│"/utf8>>
                                ),
                                unicode:characters_to_binary(_pipe@2)
                            end |
                            erlang:element(1, S)],
                        gleam@string_tree:new()};

                {Pos@3, 0} when (Pos@3 rem erlang:element(5, State)) =:= 0 ->
                    {erlang:element(1, S),
                        gleam@string_tree:append(
                            erlang:element(2, S),
                            <<"│ "/utf8>>
                        )};

                {Pos@4, 1} when (Pos@4 rem erlang:element(5, State)) =:= 0 ->
                    {erlang:element(1, S),
                        gleam@string_tree:append(
                            erlang:element(2, S),
                            <<"│@"/utf8>>
                        )};

                {Pos@5, 2} when (Pos@5 rem erlang:element(5, State)) =:= 0 ->
                    {erlang:element(1, S),
                        gleam@string_tree:append(
                            erlang:element(2, S),
                            <<"│$"/utf8>>
                        )};

                {_, 0} ->
                    {erlang:element(1, S),
                        gleam@string_tree:append(
                            erlang:element(2, S),
                            <<" "/utf8>>
                        )};

                {_, 1} ->
                    {erlang:element(1, S),
                        gleam@string_tree:append(
                            erlang:element(2, S),
                            <<"@"/utf8>>
                        )};

                {_, 2} ->
                    {erlang:element(1, S),
                        gleam@string_tree:append(
                            erlang:element(2, S),
                            <<"$"/utf8>>
                        )};

                {_, _} ->
                    erlang:error(#{gleam_error => panic,
                            message => <<"Unreachable"/utf8>>,
                            file => <<?FILEPATH/utf8>>,
                            module => <<"examples/snake"/utf8>>,
                            function => <<"draw"/utf8>>,
                            line => 319})
            end end
    ),
    Score_string = <<"Score: "/utf8,
        (erlang:integer_to_binary(erlang:element(7, State)))/binary>>,
    Score_string_len = string:length(Score_string),
    Upper_border = <<<<<<"┌"/utf8, Score_string/binary>>/binary,
            (gleam@string:repeat(
                <<"─"/utf8>>,
                erlang:element(5, State) - Score_string_len
            ))/binary>>/binary,
        "┐"/utf8>>,
    Lower_border = <<<<"└"/utf8,
            (gleam@string:repeat(<<"─"/utf8>>, erlang:element(5, State)))/binary>>/binary,
        "┘"/utf8>>,
    Strings@1 = [Lower_border | erlang:element(1, Strings)],
    Strings@2 = begin
        _pipe@3 = lists:reverse(Strings@1),
        gleam@list:prepend(_pipe@3, Upper_border)
    end,
    Q1 = colorize(Strings@2),
    Q@1 = etch@stdout:queue(Q, Q1),
    Q@2 = etch@stdout:queue(Q@1, [reset_style]),
    etch@stdout:flush(Q@2).

-file("src/examples/snake.gleam", 381).
?DOC(false).
-spec print_centered_colored_block(state(), binary(), etch@style:color()) -> list(etch@command:command()).
print_centered_colored_block(State, S, C) ->
    Len = string:length(S),
    S@1 = <<<<"│"/utf8, S/binary>>/binary, "│"/utf8>>,
    X = erlang:element(5, State),
    Y = erlang:element(4, State) div 2,
    X_offset = (Len div 2) - 1,
    X@1 = (X div 2) - X_offset,
    Upper_border = <<<<"┌"/utf8,
            (gleam@string:repeat(<<"─"/utf8>>, Len))/binary>>/binary,
        "┐"/utf8>>,
    Lower_border = <<<<"└"/utf8,
            (gleam@string:repeat(<<"─"/utf8>>, Len))/binary>>/binary,
        "┘"/utf8>>,
    [{set_foreground_color, C},
        {move_to, X@1, Y - 1},
        {print, Upper_border},
        {move_to, X@1, Y},
        {print, S@1},
        {move_to, X@1, Y + 1},
        {print, Lower_border},
        reset_style].

-file("src/examples/snake.gleam", 367).
?DOC(false).
-spec lose(state()) -> nil.
lose(State) ->
    etch@stdout:execute(
        print_centered_colored_block(State, <<"You Lose"/utf8>>, red)
    ),
    gleam_erlang_ffi:sleep(2000),
    etch@stdout:execute([{clear, all}, leave_alternate_screen]),
    erlang:halt(1).

-file("src/examples/snake.gleam", 374).
?DOC(false).
-spec win(state()) -> nil.
win(State) ->
    etch@stdout:execute(
        print_centered_colored_block(State, <<"You Win"/utf8>>, green)
    ),
    gleam_erlang_ffi:sleep(2000),
    etch@stdout:execute([{clear, all}, leave_alternate_screen]),
    erlang:halt(0).

-file("src/examples/snake.gleam", 209).
?DOC(false).
-spec handle_new_head(state(), integer()) -> state().
handle_new_head(State, New_head) ->
    case gleam_stdlib:map_get(erlang:element(2, State), New_head) of
        {ok, 1} ->
            lose(State),
            State;

        {ok, 2} ->
            State@1 = {state,
                erlang:element(2, State),
                erlang:element(3, State),
                erlang:element(4, State),
                erlang:element(5, State),
                erlang:element(6, State),
                erlang:element(7, State) + 1},
            _ = case (erlang:element(7, State@1) + 3) =:= (erlang:element(
                4,
                State@1
            )
            * erlang:element(5, State@1)) of
                true ->
                    win(State@1);

                false ->
                    nil
            end,
            Snake = [New_head | erlang:element(3, State@1)],
            Grid = gleam@dict:insert(erlang:element(2, State@1), New_head, 1),
            State@2 = {state,
                Grid,
                Snake,
                erlang:element(4, State@1),
                erlang:element(5, State@1),
                erlang:element(6, State@1),
                erlang:element(7, State@1)},
            spawn_fruit(State@2);

        {ok, 0} ->
            remove_last_snake_block(State, New_head);

        _ ->
            erlang:error(#{gleam_error => panic,
                    message => <<"Unreachable"/utf8>>,
                    file => <<?FILEPATH/utf8>>,
                    module => <<"examples/snake"/utf8>>,
                    function => <<"handle_new_head"/utf8>>,
                    line => 238})
    end.

-file("src/examples/snake.gleam", 153).
?DOC(false).
-spec move_right(state()) -> state().
move_right(State) ->
    Head@1 = case gleam@list:first(erlang:element(3, State)) of
        {ok, Head} -> Head;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                        file => <<?FILEPATH/utf8>>,
                        module => <<"examples/snake"/utf8>>,
                        function => <<"move_right"/utf8>>,
                        line => 154,
                        value => _assert_fail,
                        start => 4738,
                        'end' => 4783,
                        pattern_start => 4749,
                        pattern_end => 4757})
    end,
    New_head = case Head@1 of
        N when (N rem erlang:element(5, State)) =:= (erlang:element(5, State) - 1) ->
            lose(State),
            0;

        N@1 ->
            N@1 + 1
    end,
    handle_new_head(State, New_head).

-file("src/examples/snake.gleam", 167).
?DOC(false).
-spec move_down(state()) -> state().
move_down(State) ->
    Head@1 = case gleam@list:first(erlang:element(3, State)) of
        {ok, Head} -> Head;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                        file => <<?FILEPATH/utf8>>,
                        module => <<"examples/snake"/utf8>>,
                        function => <<"move_down"/utf8>>,
                        line => 168,
                        value => _assert_fail,
                        start => 5120,
                        'end' => 5165,
                        pattern_start => 5131,
                        pattern_end => 5139})
    end,
    New_head = case Head@1 + erlang:element(5, State) of
        N when N > (erlang:element(5, State) * erlang:element(4, State)) ->
            lose(State),
            0;

        N@1 ->
            N@1
    end,
    handle_new_head(State, New_head).

-file("src/examples/snake.gleam", 181).
?DOC(false).
-spec move_left(state()) -> state().
move_left(State) ->
    Head@1 = case gleam@list:first(erlang:element(3, State)) of
        {ok, Head} -> Head;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                        file => <<?FILEPATH/utf8>>,
                        module => <<"examples/snake"/utf8>>,
                        function => <<"move_left"/utf8>>,
                        line => 184,
                        value => _assert_fail,
                        start => 5630,
                        'end' => 5675,
                        pattern_start => 5641,
                        pattern_end => 5649})
    end,
    New_head = case Head@1 of
        N when (N rem erlang:element(5, State)) =:= 0 ->
            lose(State),
            0;

        N@1 ->
            N@1 - 1
    end,
    handle_new_head(State, New_head).

-file("src/examples/snake.gleam", 195).
?DOC(false).
-spec move_up(state()) -> state().
move_up(State) ->
    Head@1 = case gleam@list:first(erlang:element(3, State)) of
        {ok, Head} -> Head;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                        file => <<?FILEPATH/utf8>>,
                        module => <<"examples/snake"/utf8>>,
                        function => <<"move_up"/utf8>>,
                        line => 196,
                        value => _assert_fail,
                        start => 5869,
                        'end' => 5914,
                        pattern_start => 5880,
                        pattern_end => 5888})
    end,
    New_head = case Head@1 - erlang:element(5, State) of
        N when N < 0 ->
            lose(State),
            0;

        N@1 ->
            N@1
    end,
    handle_new_head(State, New_head).

-file("src/examples/snake.gleam", 144).
?DOC(false).
-spec update_state(state()) -> state().
update_state(State) ->
    case erlang:element(6, State) of
        up ->
            move_up(State);

        down ->
            move_down(State);

        left ->
            move_left(State);

        right ->
            move_right(State)
    end.

-file("src/examples/snake.gleam", 97).
?DOC(false).
-spec loop(state()) -> any().
loop(State) ->
    gleam_erlang_ffi:sleep(200),
    State@1 = handle_input(State),
    State@2 = update_state(State@1),
    draw(State@2),
    loop(State@2).

-file("src/examples/snake.gleam", 47).
?DOC(false).
-spec main() -> any().
main() ->
    etch@stdout:execute(
        [enter_raw,
            enter_alternate_screen,
            {clear, all},
            hide_cursor,
            disable_line_wrap]
    ),
    {Columns, Rows} = terminal_ffi:window_size(),
    {Columns@1, Rows@1} = {Columns - 2, Rows - 2},
    Grid = make_grid(Columns@1, Rows@1),
    Snake_center = case gleam@int:is_even(Rows@1) of
        true ->
            ((Rows@1 * Columns@1) div 2) + (Columns@1 div 2);

        false ->
            (Rows@1 * Columns@1) div 2
    end,
    State = {state,
        Grid,
        [Snake_center, Snake_center - 1, Snake_center - 2],
        Rows@1,
        Columns@1,
        right,
        0},
    State@1 = spawn_fruit(State),
    etch@event:init_event_server(),
    loop(State@1).