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

-export([print_board/1, apply_move/2, apply_move_uci_string/2, apply_move_san_string/2, apply_move_raw/2, undo_move/1, all_legal_moves/1, get_fen/1, get_status/1, disable_status/1, new_game/1, new_game_from_fen/2, shutdown/1, new_server/0, load_pgn/1]).
-export_type([message/0]).

-type message() :: {all_legal_moves,
        gleam@erlang@process:subject(list(move:move()))} |
    {apply_move,
        gleam@erlang@process:subject({ok, game:game()} | {error, binary()}),
        move:move()} |
    {apply_move_uci_string,
        gleam@erlang@process:subject({ok, game:game()} | {error, binary()}),
        binary()} |
    {apply_move_san_string,
        gleam@erlang@process:subject({ok, game:game()} | {error, binary()}),
        binary()} |
    {apply_move_raw,
        gleam@erlang@process:subject({ok, game:game()} | {error, binary()}),
        move:move()} |
    {undo_move,
        gleam@erlang@process:subject({ok, game:game()} | {error, binary()})} |
    {get_state, gleam@erlang@process:subject(game:game())} |
    {get_side_to_move, gleam@erlang@process:subject(color:color())} |
    {get_fen, gleam@erlang@process:subject(binary())} |
    {get_status,
        gleam@erlang@process:subject(gleam@option:option(status:status()))} |
    {new_game, gleam@erlang@process:subject(game:game())} |
    {new_game_from_fen,
        gleam@erlang@process:subject({ok, game:game()} | {error, binary()}),
        binary()} |
    {disable_status,
        gleam@erlang@process:subject({ok, game:game()} | {error, nil})} |
    shutdown |
    {print_board,
        gleam@erlang@process:subject({ok, binary()} | {error, binary()})}.

-spec print_board(gleam@erlang@process:subject(message())) -> {ok, binary()} |
    {error, binary()}.
print_board(Game_actor) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(Field@0) -> {print_board, Field@0} end,
        1000
    ).

-spec apply_move(gleam@erlang@process:subject(message()), move:move()) -> {ok,
        game:game()} |
    {error, binary()}.
apply_move(Game_actor, Move) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(_capture) -> {apply_move, _capture, Move} end,
        1000
    ).

-spec apply_move_uci_string(gleam@erlang@process:subject(message()), binary()) -> {ok,
        game:game()} |
    {error, binary()}.
apply_move_uci_string(Game_actor, Move_uci) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(_capture) -> {apply_move_uci_string, _capture, Move_uci} end,
        1000
    ).

-spec apply_move_san_string(gleam@erlang@process:subject(message()), binary()) -> {ok,
        game:game()} |
    {error, binary()}.
apply_move_san_string(Game_actor, Move_san) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(_capture) -> {apply_move_san_string, _capture, Move_san} end,
        1000
    ).

-spec apply_move_raw(gleam@erlang@process:subject(message()), move:move()) -> {ok,
        game:game()} |
    {error, binary()}.
apply_move_raw(Game_actor, Move) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(_capture) -> {apply_move_raw, _capture, Move} end,
        1000
    ).

-spec undo_move(gleam@erlang@process:subject(message())) -> {ok, game:game()} |
    {error, binary()}.
undo_move(Game_actor) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(Field@0) -> {undo_move, Field@0} end,
        1000
    ).

-spec all_legal_moves(gleam@erlang@process:subject(message())) -> list(move:move()).
all_legal_moves(Game_actor) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(Field@0) -> {all_legal_moves, Field@0} end,
        1000
    ).

-spec get_fen(gleam@erlang@process:subject(message())) -> binary().
get_fen(Game_actor) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(Field@0) -> {get_fen, Field@0} end,
        1000
    ).

-spec get_status(gleam@erlang@process:subject(message())) -> gleam@option:option(status:status()).
get_status(Game_actor) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(Field@0) -> {get_status, Field@0} end,
        1000
    ).

-spec disable_status(gleam@erlang@process:subject(message())) -> {ok,
        game:game()} |
    {error, nil}.
disable_status(Game_actor) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(Field@0) -> {disable_status, Field@0} end,
        1000
    ).

-spec new_game(gleam@erlang@process:subject(message())) -> game:game().
new_game(Game_actor) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(Field@0) -> {new_game, Field@0} end,
        1000
    ).

-spec new_game_from_fen(gleam@erlang@process:subject(message()), binary()) -> {ok,
        game:game()} |
    {error, binary()}.
new_game_from_fen(Game_actor, Fen) ->
    gleam@erlang@process:call(
        Game_actor,
        fun(_capture) -> {new_game_from_fen, _capture, Fen} end,
        1000
    ).

-spec shutdown(gleam@erlang@process:subject(message())) -> nil.
shutdown(Game_actor) ->
    gleam@erlang@process:send(Game_actor, shutdown).

-spec handle_all_legal_moves(
    game:game(),
    gleam@erlang@process:subject(list(move:move()))
) -> {ok, gleam@otp@actor:next(message(), game:game())} | {error, binary()}.
handle_all_legal_moves(Game, Client) ->
    gleam@result:'try'(
        game:all_legal_moves(Game),
        fun(All_legal_moves) ->
            gleam@erlang@process:send(Client, All_legal_moves),
            {ok, gleam@otp@actor:continue(Game)}
        end
    ).

-spec handle_undo_move(
    game:game(),
    gleam@erlang@process:subject({ok, game:game()} | {error, binary()})
) -> {ok, gleam@otp@actor:next(message(), game:game())} | {error, any()}.
handle_undo_move(Game, Client) ->
    case game:undo_move(Game) of
        {ok, New_game_state} ->
            gleam@erlang@process:send(Client, {ok, New_game_state}),
            {ok, gleam@otp@actor:continue(New_game_state)};

        {error, _} ->
            gleam@erlang@process:send(
                Client,
                {error, <<"Failed to undo move"/utf8>>}
            ),
            {ok, gleam@otp@actor:continue(Game)}
    end.

-spec handle_apply_move_san_string(
    game:game(),
    gleam@erlang@process:subject({ok, game:game()} | {error, binary()}),
    binary()
) -> {ok, gleam@otp@actor:next(message(), game:game())} | {error, any()}.
handle_apply_move_san_string(Game, Client, Move) ->
    case game:apply_move_san_string(Game, Move) of
        {ok, New_game_state} ->
            gleam@erlang@process:send(Client, {ok, New_game_state}),
            {ok, gleam@otp@actor:continue(New_game_state)};

        {error, _} ->
            gleam@erlang@process:send(
                Client,
                {error, <<"Failed to apply move"/utf8>>}
            ),
            {ok, gleam@otp@actor:continue(Game)}
    end.

-spec handle_apply_move_uci(
    game:game(),
    gleam@erlang@process:subject({ok, game:game()} | {error, binary()}),
    binary()
) -> {ok, gleam@otp@actor:next(message(), game:game())} | {error, any()}.
handle_apply_move_uci(Game, Client, Move) ->
    case game:apply_move_uci(Game, Move) of
        {ok, New_game_state} ->
            gleam@erlang@process:send(Client, {ok, New_game_state}),
            {ok, gleam@otp@actor:continue(New_game_state)};

        {error, _} ->
            gleam@erlang@process:send(
                Client,
                {error, <<"Failed to apply move"/utf8>>}
            ),
            {ok, gleam@otp@actor:continue(Game)}
    end.

-spec handle_apply_move(
    game:game(),
    gleam@erlang@process:subject({ok, game:game()} | {error, binary()}),
    move:move()
) -> {ok, gleam@otp@actor:next(message(), game:game())} | {error, any()}.
handle_apply_move(Game, Client, Move) ->
    case game:apply_move(Game, Move) of
        {ok, New_game_state} ->
            gleam@erlang@process:send(Client, {ok, New_game_state}),
            {ok, gleam@otp@actor:continue(New_game_state)};

        {error, _} ->
            gleam@erlang@process:send(
                Client,
                {error, <<"Failed to apply move"/utf8>>}
            ),
            {ok, gleam@otp@actor:continue(Game)}
    end.

-spec handle_apply_move_raw(
    game:game(),
    gleam@erlang@process:subject({ok, game:game()} | {error, binary()}),
    move:move()
) -> {ok, gleam@otp@actor:next(message(), game:game())} | {error, any()}.
handle_apply_move_raw(Game, Client, Move) ->
    New_game_state = game:apply_move_raw(Game, Move),
    gleam@erlang@process:send(Client, New_game_state),
    {ok, case New_game_state of
            {ok, New_game_state@1} ->
                gleam@otp@actor:continue(New_game_state@1);

            {error, _} ->
                gleam@otp@actor:continue(Game)
        end}.

-spec handle_get_fen(game:game(), gleam@erlang@process:subject(binary())) -> {ok,
        gleam@otp@actor:next(any(), game:game())} |
    {error, any()}.
handle_get_fen(Game, Client) ->
    gleam@erlang@process:send(Client, game:to_fen(Game)),
    {ok, gleam@otp@actor:continue(Game)}.

-spec handle_print_board(
    game:game(),
    gleam@erlang@process:subject({ok, binary()} | {error, binary()})
) -> gleam@otp@actor:next(message(), game:game()).
handle_print_board(Game, Client) ->
    gleam@erlang@process:send(Client, game:print_board(Game)),
    gleam@otp@actor:continue(Game).

-spec handle_message(message(), game:game()) -> gleam@otp@actor:next(message(), game:game()).
handle_message(Message, Game) ->
    case Message of
        {all_legal_moves, Client} ->
            case handle_all_legal_moves(Game, Client) of
                {ok, Next} ->
                    Next;

                {error, _} ->
                    gleam@otp@actor:continue(Game)
            end;

        {apply_move, Client@1, Move} ->
            case handle_apply_move(Game, Client@1, Move) of
                {ok, Next@1} ->
                    Next@1;

                {error, _} ->
                    gleam@otp@actor:continue(Game)
            end;

        {apply_move_uci_string, Client@2, Move@1} ->
            case handle_apply_move_uci(Game, Client@2, Move@1) of
                {ok, Next@2} ->
                    Next@2;

                {error, _} ->
                    gleam@otp@actor:continue(Game)
            end;

        {apply_move_san_string, Client@3, Move@2} ->
            case handle_apply_move_san_string(Game, Client@3, Move@2) of
                {ok, Next@3} ->
                    Next@3;

                {error, _} ->
                    gleam@otp@actor:continue(Game)
            end;

        {apply_move_raw, Client@4, Move@3} ->
            case handle_apply_move_raw(Game, Client@4, Move@3) of
                {ok, Next@4} ->
                    Next@4;

                {error, _} ->
                    gleam@otp@actor:continue(Game)
            end;

        {undo_move, Client@5} ->
            case handle_undo_move(Game, Client@5) of
                {ok, Next@5} ->
                    Next@5;

                {error, _} ->
                    gleam@otp@actor:continue(Game)
            end;

        {get_state, Client@6} ->
            gleam@erlang@process:send(Client@6, Game),
            gleam@otp@actor:continue(Game);

        {get_fen, Client@7} ->
            case handle_get_fen(Game, Client@7) of
                {ok, Next@6} ->
                    Next@6;

                {error, _} ->
                    gleam@otp@actor:continue(Game)
            end;

        {get_status, Client@8} ->
            gleam@erlang@process:send(Client@8, erlang:element(5, Game)),
            gleam@otp@actor:continue(Game);

        {get_side_to_move, Client@9} ->
            gleam@erlang@process:send(Client@9, erlang:element(3, Game)),
            gleam@otp@actor:continue(Game);

        {new_game, Client@10} ->
            New_game = game:new_game(),
            gleam@erlang@process:send(Client@10, New_game),
            gleam@otp@actor:continue(New_game);

        {new_game_from_fen, Client@11, Fen} ->
            case game:from_fen_string(Fen) of
                {ok, New_game@1} ->
                    gleam@erlang@process:send(Client@11, {ok, New_game@1}),
                    gleam@otp@actor:continue(New_game@1);

                {error, _} ->
                    gleam@erlang@process:send(
                        Client@11,
                        {error, <<"Failed to create game from fen"/utf8>>}
                    ),
                    gleam@otp@actor:continue(Game)
            end;

        {disable_status, Client@12} ->
            New_game@2 = game:disable_status(Game),
            gleam@erlang@process:send(Client@12, {ok, New_game@2}),
            gleam@otp@actor:continue(New_game@2);

        shutdown ->
            {stop, normal};

        {print_board, Client@13} ->
            handle_print_board(Game, Client@13)
    end.

-spec new_server() -> {ok, gleam@erlang@process:subject(message())} |
    {error, gleam@otp@actor:start_error()}.
new_server() ->
    gleam@otp@actor:start(game:new_game(), fun handle_message/2).

-spec load_pgn(binary()) -> {ok, gleam@erlang@process:subject(message())} |
    {error, binary()}.
load_pgn(Pgn_string) ->
    case game:load_pgn(Pgn_string) of
        {ok, Game} ->
            case gleam@otp@actor:start(Game, fun handle_message/2) of
                {ok, Actor} ->
                    {ok, Actor};

                {error, _} ->
                    {error, <<"Failed to start actor"/utf8>>}
            end;

        {error, Error} ->
            {error, Error}
    end.