-module(glyph_codegen@codegen).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([generate/1, main/0]).
-export_type([field_decoder/0, args/0]).

-type field_decoder() :: {field, binary(), binary()} |
    {optional_field, binary(), binary()}.

-type args() :: {args,
        list(binary()),
        binary(),
        binary(),
        gleam@dict:dict(binary(), binary())}.

-spec parse_args(list(binary())) -> args().
parse_args(Arguments) ->
    case Arguments of
        [<<"--import-module"/utf8>> | Rest] ->
            _assert_subject = gleam@list:split(Rest, 1),
            {[Val], Rest@1} = case _assert_subject of
                {[_], _} -> _assert_subject;
                _assert_fail ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"parse_args"/utf8>>,
                                line => 300})
            end,
            _assert_subject@1 = parse_args(Rest@1),
            {args, _, _, _, _} = Args = case _assert_subject@1 of
                {args, _, _, _, _} -> _assert_subject@1;
                _assert_fail@1 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@1,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"parse_args"/utf8>>,
                                line => 301})
            end,
            erlang:setelement(4, Args, Val);

        [<<"--type"/utf8>> | Rest@2] ->
            _assert_subject@2 = gleam@list:split(Rest@2, 1),
            {[Val@1], Rest@3} = case _assert_subject@2 of
                {[_], _} -> _assert_subject@2;
                _assert_fail@2 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@2,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"parse_args"/utf8>>,
                                line => 305})
            end,
            _assert_subject@3 = parse_args(Rest@3),
            {args, _, _, _, _} = Args@1 = case _assert_subject@3 of
                {args, _, _, _, _} -> _assert_subject@3;
                _assert_fail@3 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@3,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"parse_args"/utf8>>,
                                line => 306})
            end,
            erlang:setelement(
                2,
                Args@1,
                begin
                    _pipe = erlang:element(2, Args@1),
                    gleam@list:prepend(_pipe, Val@1)
                end
            );

        [<<"--out-file"/utf8>> | Rest@4] ->
            _assert_subject@4 = gleam@list:split(Rest@4, 1),
            {[Val@2], Rest@5} = case _assert_subject@4 of
                {[_], _} -> _assert_subject@4;
                _assert_fail@4 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@4,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"parse_args"/utf8>>,
                                line => 314})
            end,
            _assert_subject@5 = parse_args(Rest@5),
            {args, _, _, _, _} = Args@2 = case _assert_subject@5 of
                {args, _, _, _, _} -> _assert_subject@5;
                _assert_fail@5 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@5,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"parse_args"/utf8>>,
                                line => 315})
            end,
            erlang:setelement(3, Args@2, Val@2);

        [<<"--rename"/utf8>> | Rest@6] ->
            _assert_subject@6 = gleam@list:split(Rest@6, 2),
            {[V1, V2], Rest@7} = case _assert_subject@6 of
                {[_, _], _} -> _assert_subject@6;
                _assert_fail@6 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@6,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"parse_args"/utf8>>,
                                line => 319})
            end,
            _assert_subject@7 = parse_args(Rest@7),
            {args, _, _, _, _} = Args@3 = case _assert_subject@7 of
                {args, _, _, _, _} -> _assert_subject@7;
                _assert_fail@7 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@7,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"parse_args"/utf8>>,
                                line => 320})
            end,
            erlang:setelement(
                5,
                Args@3,
                begin
                    _pipe@1 = erlang:element(5, Args@3),
                    gleam@dict:insert(_pipe@1, V1, V2)
                end
            );

        [] ->
            {args, [], <<""/utf8>>, <<""/utf8>>, gleam@dict:new()};

        _ ->
            erlang:error(#{gleam_error => panic,
                    message => <<"parsing error"/utf8>>,
                    module => <<"glyph_codegen/codegen"/utf8>>,
                    function => <<"parse_args"/utf8>>,
                    line => 330})
    end.

-spec do_template(binary(), list({binary(), gleam@bbmustache:argument()})) -> binary().
do_template(Templ, Args) ->
    _assert_subject = gleam@bbmustache:compile(Templ),
    {ok, Compiled} = case _assert_subject of
        {ok, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"glyph_codegen/codegen"/utf8>>,
                        function => <<"do_template"/utf8>>,
                        line => 377})
    end,
    gleam@bbmustache:render(Compiled, Args).

-spec format(binary(), list(binary())) -> binary().
format(Fmt, Args) ->
    case gleam@string:split_once(Fmt, <<"%"/utf8>>) of
        {ok, {Left, Right}} ->
            case Args of
                [] ->
                    <<""/utf8>>;

                [E1] ->
                    <<<<Left/binary, E1/binary>>/binary, Right/binary>>;

                [E1@1 | Rest] ->
                    <<<<Left/binary, E1@1/binary>>/binary,
                        (format(Right, Rest))/binary>>
            end;

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

-spec convert_type_to_decoder(glance:field(glance:type())) -> field_decoder().
convert_type_to_decoder(Field) ->
    Id@1 = case erlang:element(2, Field) of
        {some, Id} ->
            Id;

        _ ->
            erlang:error(#{gleam_error => panic,
                    message => <<"unknown id"/utf8>>,
                    module => <<"glyph_codegen/codegen"/utf8>>,
                    function => <<"convert_type_to_decoder"/utf8>>,
                    line => 119})
    end,
    gleam@io:debug(<<"parsing field: "/utf8, Id@1/binary>>),
    gleam@io:debug(Field),
    case erlang:element(3, Field) of
        {named_type,
            <<"List"/utf8>>,
            _,
            [{named_type, <<"String"/utf8>>, _, []}]} ->
            {field, Id@1, <<"dynamic.list(dynamic.string)"/utf8>>};

        {named_type, <<"List"/utf8>>, _, [{named_type, <<"Int"/utf8>>, _, []}]} ->
            {field, Id@1, <<"dynamic.list(dynamic.int)"/utf8>>};

        {named_type,
            <<"List"/utf8>>,
            _,
            [{named_type, <<"Snowflake"/utf8>>, _, []}]} ->
            {field, Id@1, <<"dynamic.list(dynamic.string)"/utf8>>};

        {named_type, <<"List"/utf8>>, _, [{named_type, Name, _, []}]} when ((Name =/= <<"String"/utf8>>) andalso (Name =/= <<"Int"/utf8>>)) andalso (Name =/= <<"Bool"/utf8>>) ->
            {field,
                Id@1,
                format(
                    <<"dynamic.list(decode_%)"/utf8>>,
                    [justin:snake_case(Name)]
                )};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type, <<"Float"/utf8>>, _, []}]} ->
            {optional_field, Id@1, <<"dynamic.float"/utf8>>};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type, <<"Nil"/utf8>>, _, []}]} ->
            {optional_field, Id@1, <<"dynamic.string"/utf8>>};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type, <<"Snowflake"/utf8>>, _, []}]} ->
            {optional_field, Id@1, <<"dynamic.string"/utf8>>};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type, <<"String"/utf8>>, _, []}]} ->
            {optional_field, Id@1, <<"dynamic.string"/utf8>>};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type, <<"Int"/utf8>>, _, []}]} ->
            {optional_field, Id@1, <<"dynamic.int"/utf8>>};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type, <<"Bool"/utf8>>, _, []}]} ->
            {optional_field, Id@1, <<"dynamic.bool"/utf8>>};

        {named_type, <<"Option"/utf8>>, _, [{named_type, Name@1, _, []}]} when ((Name@1 =/= <<"String"/utf8>>) andalso (Name@1 =/= <<"Int"/utf8>>)) andalso (Name@1 =/= <<"Bool"/utf8>>) ->
            {optional_field,
                Id@1,
                format(<<"decode_%"/utf8>>, [justin:snake_case(Name@1)])};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type,
                    <<"Dict"/utf8>>,
                    _,
                    [{named_type, <<"Snowflake"/utf8>>, _, []},
                        {named_type, P2, _, []}]}]} ->
            {optional_field,
                Id@1,
                format(
                    <<"dynamic.dict(dynamic.string, decode_%)"/utf8>>,
                    [justin:snake_case(P2)]
                )};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type,
                    <<"List"/utf8>>,
                    _,
                    [{named_type, <<"Snowflake"/utf8>>, _, []}]}]} ->
            {optional_field, Id@1, <<"dynamic.list(dynamic.string)"/utf8>>};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type, <<"List"/utf8>>, _, [{named_type, Name@2, _, []}]}]} when ((Name@2 =/= <<"String"/utf8>>) andalso (Name@2 =/= <<"Int"/utf8>>)) andalso (Name@2 =/= <<"Bool"/utf8>>) ->
            {optional_field,
                Id@1,
                format(
                    <<"dynamic.list(decode_%)"/utf8>>,
                    [justin:snake_case(Name@2)]
                )};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type,
                    <<"List"/utf8>>,
                    _,
                    [{named_type, <<"Int"/utf8>>, _, []}]}]} ->
            {optional_field, Id@1, <<"dynamic.list(dynamic.int)"/utf8>>};

        {named_type,
            <<"Option"/utf8>>,
            _,
            [{named_type,
                    <<"List"/utf8>>,
                    _,
                    [{named_type, <<"String"/utf8>>, _, []}]}]} ->
            {optional_field, Id@1, <<"dynamic.list(dynamic.string)"/utf8>>};

        {named_type, <<"dynamic.Dynamic"/utf8>>, _, []} ->
            {field, Id@1, <<"dynamic.dynamic"/utf8>>};

        {named_type, Name@3, _, []} when (Name@3 =:= <<"Snowflake"/utf8>>) orelse (Name@3 =:= <<"String"/utf8>>) ->
            {field, Id@1, <<"dynamic.string"/utf8>>};

        {named_type, <<"Int"/utf8>>, _, []} ->
            {field, Id@1, <<"dynamic.int"/utf8>>};

        {named_type, <<"Dynamic"/utf8>>, _, []} ->
            {field, Id@1, <<"dynamic.dynamic"/utf8>>};

        {named_type, <<"Bool"/utf8>>, _, []} ->
            {field, Id@1, <<"dynamic.bool"/utf8>>};

        {named_type, Name@4, _, []} ->
            {field,
                Id@1,
                format(<<"decode_%"/utf8>>, [justin:snake_case(Name@4)])};

        {named_type,
            <<"Dict"/utf8>>,
            _,
            [{named_type, P1, _, []}, {named_type, P2@1, _, []}]} ->
            {field,
                Id@1,
                format(
                    <<"dynamic.dict(dynamic.%, dynamic.%)"/utf8>>,
                    [justin:snake_case(P1), justin:snake_case(P2@1)]
                )};

        _ ->
            erlang:error(#{gleam_error => panic,
                    message => <<"unsupported type"/utf8>>,
                    module => <<"glyph_codegen/codegen"/utf8>>,
                    function => <<"convert_type_to_decoder"/utf8>>,
                    line => 284})
    end.

-spec get_fields(list(glance:field(glance:type()))) -> list(field_decoder()).
get_fields(Fields) ->
    case Fields of
        [Field | Fields@1] ->
            [convert_type_to_decoder(Field) | get_fields(Fields@1)];

        [] ->
            []
    end.

-spec render_template(args(), binary(), list(field_decoder())) -> binary().
render_template(Args, Type_name, Fields) ->
    Fields@1 = begin
        _pipe = Fields,
        gleam@list:index_map(
            _pipe,
            fun(X, Idx) ->
                Comma = case (Idx + 1) =:= gleam@list:length(Fields) of
                    true ->
                        <<""/utf8>>;

                    _ ->
                        <<","/utf8>>
                end,
                {Func_name, Name@2, Arg@2} = case X of
                    {field, Name, Arg} ->
                        {<<"dynamic.field"/utf8>>, Name, Arg};

                    {optional_field, Name@1, Arg@1} ->
                        {<<"dynamic.optional_field"/utf8>>, Name@1, Arg@1}
                end,
                Name@3 = case gleam@dict:get(erlang:element(5, Args), Name@2) of
                    {ok, Renamed} ->
                        Renamed;

                    {error, _} ->
                        Name@2
                end,
                gleam_bbmustache_native:argument(
                    [{<<"index"/utf8>>,
                            gleam_bbmustache_native:argument(
                                <<"a"/utf8,
                                    (begin
                                        _pipe@1 = Idx + 1,
                                        gleam@int:to_string(_pipe@1)
                                    end)/binary>>
                            )},
                        {<<"func_name"/utf8>>,
                            gleam_bbmustache_native:argument(Func_name)},
                        {<<"key"/utf8>>,
                            gleam_bbmustache_native:argument(Name@3)},
                        {<<"value"/utf8>>,
                            gleam_bbmustache_native:argument(Arg@2)},
                        {<<"comma"/utf8>>,
                            gleam_bbmustache_native:argument(Comma)}]
                )
            end
        )
    end,
    do_template(
        <<"
pub fn decode_{{type_snake_case}}(
  dyn: dynamic.Dynamic,
) -> Result(discord.{{type_name}}, dynamic.DecodeErrors) {
  case
    {{#fields}}{{func_name}}(\"{{key}}\", {{value}})(dyn){{comma}}{{/fields}}
  {
    {{#fields}}Ok({{index}}){{comma}}{{/fields}} ->
     Ok(discord.{{type_name}}({{#fields}}{{index}}{{comma}}{{/fields}}
    ))
     {{#fields}}{{index}}{{comma}}{{/fields}} ->
      Error(list.concat([
        {{#fields}}all_errors({{index}}){{comma}}{{/fields}}
      ]))
  }
}
"/utf8>>,
        [{<<"fields"/utf8>>, gleam_bbmustache_native:argument(Fields@1)},
            {<<"type_name"/utf8>>, gleam_bbmustache_native:argument(Type_name)},
            {<<"type_snake_case"/utf8>>,
                gleam_bbmustache_native:argument(justin:snake_case(Type_name))}]
    ).

-spec codegen(args()) -> {ok, binary()} | {error, {integer(), binary()}}.
codegen(Args) ->
    gleam@io:debug(simplifile:read_directory(<<"."/utf8>>)),
    _assert_subject = simplifile:read(
        <<<<"./src/"/utf8, (erlang:element(4, Args))/binary>>/binary,
            ".gleam"/utf8>>
    ),
    {ok, Source} = case _assert_subject of
        {ok, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"glyph_codegen/codegen"/utf8>>,
                        function => <<"codegen"/utf8>>,
                        line => 61})
    end,
    _assert_subject@1 = glance:module(Source),
    {ok, Module} = case _assert_subject@1 of
        {ok, _} -> _assert_subject@1;
        _assert_fail@1 ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail@1,
                        module => <<"glyph_codegen/codegen"/utf8>>,
                        function => <<"codegen"/utf8>>,
                        line => 63})
    end,
    Output_path = erlang:element(3, Args),
    case simplifile:delete(Output_path) of
        {ok, _} ->
            nil;

        {error, enoent} ->
            nil;

        _ ->
            erlang:error(#{gleam_error => panic,
                    message => <<"cannot delete a old file"/utf8>>,
                    module => <<"glyph_codegen/codegen"/utf8>>,
                    function => <<"codegen"/utf8>>,
                    line => 70})
    end,
    Rendered = do_template(
        <<"
import gleam/dynamic
import gleam/list
import {{module}}

fn all_errors(result: Result(a, dynamic.DecodeErrors)) -> dynamic.DecodeErrors {
  case result {
    Ok(_) -> []
    Error(errors) -> errors
  }
}
"/utf8>>,
        [{<<"module"/utf8>>,
                gleam_bbmustache_native:argument(erlang:element(4, Args))}]
    ),
    _assert_subject@2 = simplifile:write(Output_path, Rendered),
    {ok, _} = case _assert_subject@2 of
        {ok, _} -> _assert_subject@2;
        _assert_fail@2 ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail@2,
                        module => <<"glyph_codegen/codegen"/utf8>>,
                        function => <<"codegen"/utf8>>,
                        line => 77})
    end,
    gleam@list:each(
        erlang:element(2, Args),
        fun(Type_name) ->
            gleam@io:debug(<<"looking for the type: "/utf8, Type_name/binary>>),
            _assert_subject@3 = begin
                _pipe = erlang:element(3, Module),
                gleam@list:find(
                    _pipe,
                    fun(X) ->
                        erlang:element(2, erlang:element(3, X)) =:= Type_name
                    end
                )
            end,
            {ok, Found} = case _assert_subject@3 of
                {ok, _} -> _assert_subject@3;
                _assert_fail@3 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@3,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"codegen"/utf8>>,
                                line => 81})
            end,
            _assert_subject@4 = begin
                _pipe@1 = erlang:element(6, erlang:element(3, Found)),
                gleam@list:at(_pipe@1, 0)
            end,
            {ok, First_variant} = case _assert_subject@4 of
                {ok, _} -> _assert_subject@4;
                _assert_fail@4 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@4,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"codegen"/utf8>>,
                                line => 84})
            end,
            Fields_decoders = get_fields(erlang:element(3, First_variant)),
            Rendered@1 = render_template(Args, Type_name, Fields_decoders),
            _assert_subject@5 = simplifile:append(Output_path, Rendered@1),
            {ok, _} = case _assert_subject@5 of
                {ok, _} -> _assert_subject@5;
                _assert_fail@5 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@5,
                                module => <<"glyph_codegen/codegen"/utf8>>,
                                function => <<"codegen"/utf8>>,
                                line => 91})
            end
        end
    ),
    gleam@io:debug(<<"formatting..."/utf8>>),
    _assert_subject@6 = shellout:command(
        <<"gleam"/utf8>>,
        [<<"format"/utf8>>, Output_path],
        <<"."/utf8>>,
        [let_be_stdout]
    ),
    {ok, _} = case _assert_subject@6 of
        {ok, _} -> _assert_subject@6;
        _assert_fail@6 ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail@6,
                        module => <<"glyph_codegen/codegen"/utf8>>,
                        function => <<"codegen"/utf8>>,
                        line => 96})
    end.

-spec generate(args()) -> {ok, binary()} | {error, {integer(), binary()}}.
generate(Args) ->
    codegen(Args).

-spec main() -> {ok, binary()} | {error, {integer(), binary()}}.
main() ->
    case simplifile:verify_is_file(<<"./gleam.toml"/utf8>>) of
        {ok, Exists} when Exists =:= true ->
            nil;

        _ ->
            erlang:error(#{gleam_error => panic,
                    message => <<"not in project root"/utf8>>,
                    module => <<"glyph_codegen/codegen"/utf8>>,
                    function => <<"main"/utf8>>,
                    line => 52})
    end,
    _assert_subject = parse_args(erlang:element(4, argv:load())),
    {args, _, _, _, _} = Args = case _assert_subject of
        {args, _, _, _, _} -> _assert_subject;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"glyph_codegen/codegen"/utf8>>,
                        function => <<"main"/utf8>>,
                        line => 55})
    end,
    codegen(Args).