-module(internal@ast_fun).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).

-export([is_pub_fun_used/3, public_funs/1]).

-spec check_fun_usage(
    list(any()),
    internal@ast:public_member(),
    internal@ast:module_name()
) -> {ok, nil} | {error, nil}.
check_fun_usage(Statements, Pub_fun_name, Module_name) ->
    {public_fun, Pub_fun_name@1} = case Pub_fun_name of
        {public_fun, _} -> Pub_fun_name;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"internal/ast_fun"/utf8>>,
                        function => <<"check_fun_usage"/utf8>>,
                        line => 41})
    end,
    {module_name, Module_name@1} = case Module_name of
        {module_name, _} -> Module_name;
        _assert_fail@1 ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail@1,
                        module => <<"internal/ast_fun"/utf8>>,
                        function => <<"check_fun_usage"/utf8>>,
                        line => 42})
    end,
    gleam@list:find_map(
        Statements,
        fun(Statement) ->
            case begin
                _pipe = Statement,
                _pipe@1 = gleam@string:inspect(_pipe),
                gleam_stdlib:contains_string(
                    _pipe@1,
                    <<<<<<<<"FieldAccess(Variable(\""/utf8,
                                    Module_name@1/binary>>/binary,
                                "\"), \""/utf8>>/binary,
                            Pub_fun_name@1/binary>>/binary,
                        "\")"/utf8>>
                )
            end of
                true ->
                    {ok, nil};

                false ->
                    {error, nil}
            end
        end
    ).

-spec is_pub_fun_used(
    internal@ast:another_files_ast(),
    internal@ast:public_member(),
    internal@fs:module_full_name()
) -> {ok, nil} | {error, nil}.
is_pub_fun_used(Files_ast, Pub_fun_name, Module_full_name) ->
    {another_files_ast, Files_ast@1} = case Files_ast of
        {another_files_ast, _} -> Files_ast;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"internal/ast_fun"/utf8>>,
                        function => <<"is_pub_fun_used"/utf8>>,
                        line => 23})
    end,
    gleam@list:find_map(
        Files_ast@1,
        fun(File_ast) ->
            {file_ast, Ast} = case File_ast of
                {file_ast, _} -> File_ast;
                _assert_fail@1 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@1,
                                module => <<"internal/ast_fun"/utf8>>,
                                function => <<"is_pub_fun_used"/utf8>>,
                                line => 25})
            end,
            {module, Imports, _, _, _, _, _, Fns} = case Ast of
                {module, _, _, _, _, _, _, _} -> Ast;
                _assert_fail@2 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@2,
                                module => <<"internal/ast_fun"/utf8>>,
                                function => <<"is_pub_fun_used"/utf8>>,
                                line => 26})
            end,
            Imported_info_list = internal@ast:imported_info(
                Imports,
                Module_full_name,
                Pub_fun_name
            ),
            gleam@list:find_map(
                Imported_info_list,
                fun(Imported_info) -> case Imported_info of
                        imported_as_alias ->
                            {ok, nil};

                        {module_imported, Module_name} ->
                            gleam@list:find_map(
                                Fns,
                                fun(Fun_def) ->
                                    {definition,
                                        _,
                                        {function, _, _, _, _, Statements, _}} = case Fun_def of
                                        {definition,
                                            _,
                                            {function, _, _, _, _, _, _}} -> Fun_def;
                                        _assert_fail@3 ->
                                            erlang:error(
                                                    #{gleam_error => let_assert,
                                                        message => <<"Assertion pattern match failed"/utf8>>,
                                                        value => _assert_fail@3,
                                                        module => <<"internal/ast_fun"/utf8>>,
                                                        function => <<"is_pub_fun_used"/utf8>>,
                                                        line => 34}
                                                )
                                    end,
                                    check_fun_usage(
                                        Statements,
                                        Pub_fun_name,
                                        Module_name
                                    )
                                end
                            )
                    end end
            )
        end
    ).

-spec public_funs(internal@ast:file_ast()) -> list(internal@ast:public_member()).
public_funs(File_ast) ->
    {file_ast, Ast} = case File_ast of
        {file_ast, _} -> File_ast;
        _assert_fail ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail,
                        module => <<"internal/ast_fun"/utf8>>,
                        function => <<"public_funs"/utf8>>,
                        line => 12})
    end,
    {module, _, _, _, _, _, _, Funs} = case Ast of
        {module, _, _, _, _, _, _, _} -> Ast;
        _assert_fail@1 ->
            erlang:error(#{gleam_error => let_assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _assert_fail@1,
                        module => <<"internal/ast_fun"/utf8>>,
                        function => <<"public_funs"/utf8>>,
                        line => 13})
    end,
    gleam@list:flat_map(
        Funs,
        fun(Fun_def) ->
            {definition, _, {function, Fun_name, Is_public, _, _, _, _}} = case Fun_def of
                {definition, _, {function, _, _, _, _, _, _}} -> Fun_def;
                _assert_fail@2 ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _assert_fail@2,
                                module => <<"internal/ast_fun"/utf8>>,
                                function => <<"public_funs"/utf8>>,
                                line => 15})
            end,
            case Is_public of
                public when Fun_name =/= <<"main"/utf8>> ->
                    [{public_fun, Fun_name}];

                _ ->
                    []
            end
        end
    ).