-module(glacier).
-compile(no_auto_import).

-export([main/0]).
-export_type([target/0, module_kind/0, parse_mode/0]).

-type target() :: erlang_target | java_script_target.

-type module_kind() :: src_module_kind | test_module_kind.

-type parse_mode() :: parse_mode_in_comment |
    parse_mode_in_string |
    parse_mode_search.

-spec main() -> nil.
main() ->
    Start_args = start_args(),
    Is_incremental = gleam@list:contains(Start_args, <<"--glacier"/utf8>>),
    Is_empty_args = Start_args =:= [],
    case {Is_empty_args, Is_incremental} of
        {true, _@1} ->
            gleeunit2:main();

        {_@2, true} ->
            _pipe = <<"🏔 Glacier is watching for changes…"/utf8>>,
            _pipe@2 = shellout:style(
                _pipe,
                begin
                    _pipe@1 = shellout:display([<<"italic"/utf8>>]),
                    gleam@map:merge(
                        _pipe@1,
                        shellout:color([<<"lightblue"/utf8>>])
                    )
                end,
                [{[<<"color"/utf8>>, <<"background"/utf8>>],
                        [{<<"lightblue"/utf8>>,
                                [<<"156"/utf8>>, <<"231"/utf8>>, <<"255"/utf8>>]}]}]
            ),
            gleam@io:println(_pipe@2),
            start_file_change_watcher(
                fun(Modules) -> execute_tests(Modules) end
            );

        {_@3, _@4} ->
            gleeunit2:run(Start_args)
    end.

-spec execute_tests(list({module_kind(), binary()})) -> nil.
execute_tests(Modules) ->
    Test_modules@1 = begin
        _pipe@2 = gleam@list:fold(
            Modules,
            [],
            fun(Test_modules_acc, Module) ->
                Module_kind = erlang:element(1, Module),
                Full_module_path = erlang:element(2, Module),
                Test_modules = case Module_kind of
                    src_module_kind ->
                        _pipe = detect_distinct_import_module_dependency_chain(
                            [file_name_to_module_name(
                                    Full_module_path,
                                    src_module_kind
                                )],
                            []
                        ),
                        _pipe@1 = derive_test_modules_from_src_import_dependencies(
                            _pipe
                        ),
                        gleam@list:map(
                            _pipe@1,
                            fun(Test_module) ->
                                <<<<"test/"/utf8, Test_module/binary>>/binary,
                                    ".gleam"/utf8>>
                            end
                        );

                    test_module_kind ->
                        [to_relative_path(Full_module_path)]
                end,
                gleam@list:append(Test_modules_acc, Test_modules)
            end
        ),
        gleam@list:unique(_pipe@2)
    end,
    case Test_modules@1 of
        [] ->
            _pipe@3 = <<"🏔 Did not detect any matching test modules!"/utf8>>,
            _pipe@5 = shellout:style(
                _pipe@3,
                begin
                    _pipe@4 = shellout:display([<<"bold"/utf8>>]),
                    gleam@map:merge(
                        _pipe@4,
                        shellout:color([<<"lightblue"/utf8>>])
                    )
                end,
                [{[<<"color"/utf8>>, <<"background"/utf8>>],
                        [{<<"lightblue"/utf8>>,
                                [<<"156"/utf8>>, <<"231"/utf8>>, <<"255"/utf8>>]}]}]
            ),
            gleam@io:println(_pipe@5),
            nil;

        Test_modules@2 ->
            _pipe@6 = <<"🏔 Detected test modules:"/utf8>>,
            _pipe@8 = shellout:style(
                _pipe@6,
                begin
                    _pipe@7 = shellout:display([<<"bold"/utf8>>]),
                    gleam@map:merge(
                        _pipe@7,
                        shellout:color([<<"lightblue"/utf8>>])
                    )
                end,
                [{[<<"color"/utf8>>, <<"background"/utf8>>],
                        [{<<"lightblue"/utf8>>,
                                [<<"156"/utf8>>, <<"231"/utf8>>, <<"255"/utf8>>]}]}]
            ),
            gleam@io:println(_pipe@8),
            _pipe@9 = gleam@list:map(
                Test_modules@2,
                fun(Test_module@1) ->
                    <<"  ❄ "/utf8, Test_module@1/binary>>
                end
            ),
            _pipe@10 = gleam@string:join(_pipe@9, <<"\n"/utf8>>),
            _pipe@11 = shellout:style(
                _pipe@10,
                shellout:color([<<"lightblue"/utf8>>]),
                [{[<<"color"/utf8>>, <<"background"/utf8>>],
                        [{<<"lightblue"/utf8>>,
                                [<<"156"/utf8>>, <<"231"/utf8>>, <<"255"/utf8>>]}]}]
            ),
            gleam@io:println(_pipe@11),
            Args = [<<"test"/utf8>>, <<"--target"/utf8>>, case target() of
                    erlang_target ->
                        <<"erlang"/utf8>>;

                    java_script_target ->
                        <<"javascript"/utf8>>
                end, <<"--"/utf8>> | Test_modules@2],
            case shellout:command(
                <<"gleam"/utf8>>,
                Args,
                <<"."/utf8>>,
                [let_be_stderr]
            ) of
                {ok, Msg} ->
                    gleam@io:print(Msg),
                    nil;

                {error, _@1} ->
                    nil
            end
    end.

-spec start_file_change_watcher(fun((list({module_kind(), binary()})) -> nil)) -> nil.
start_file_change_watcher(File_change_handler) ->
    glacier_ffi:start_file_change_watcher(File_change_handler),
    nil.

-spec detect_distinct_import_module_dependency_chain(
    list(binary()),
    list(binary())
) -> list(binary()).
detect_distinct_import_module_dependency_chain(
    Module_names,
    Processed_module_names
) ->
    case Module_names of
        [] ->
            Processed_module_names;

        [Module_name | Rest_module_names] ->
            case gleam@list:contains(Processed_module_names, Module_name) of
                true ->
                    detect_distinct_import_module_dependency_chain(
                        Rest_module_names,
                        Processed_module_names
                    );

                false ->
                    Unchecked_module_names = begin
                        _pipe = Module_name,
                        _pipe@1 = module_name_to_file_name(
                            _pipe,
                            src_module_kind
                        ),
                        _pipe@2 = parse_module_for_imports(_pipe@1),
                        _pipe@3 = gleam@list:append(_pipe@2, Module_names),
                        gleam@list:filter(
                            _pipe@3,
                            fun(Module_name@1) ->
                                (gleam@list:contains(
                                    Processed_module_names,
                                    Module_name@1
                                )
                                =:= false)
                                andalso file_exists(
                                    module_name_to_file_name(
                                        Module_name@1,
                                        src_module_kind
                                    )
                                )
                            end
                        )
                    end,
                    detect_distinct_import_module_dependency_chain(
                        gleam@list:append(
                            Rest_module_names,
                            Unchecked_module_names
                        ),
                        gleam@list:append(Processed_module_names, [Module_name])
                    )
            end
    end.

-spec parse_module_for_imports(binary()) -> list(binary()).
parse_module_for_imports(Module_file_name) ->
    _pipe = Module_file_name,
    _pipe@1 = read_module_file(_pipe),
    _pipe@2 = gleam@string:to_graphemes(_pipe@1),
    _pipe@3 = parse_module_string(_pipe@2, [], parse_mode_search, <<""/utf8>>),
    gleam@list:unique(_pipe@3).

-spec parse_module_string(
    list(binary()),
    list(binary()),
    parse_mode(),
    binary()
) -> list(binary()).
parse_module_string(Chars, Imports, Context, Collected) ->
    case Chars of
        [] ->
            Imports;

        [Char | Rest_chars] ->
            case {Context, Collected, Char} of
                {parse_mode_search, <<""/utf8>>, <<"/"/utf8>>} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_search,
                        <<"/"/utf8>>
                    );

                {parse_mode_search, <<"/"/utf8>>, <<"/"/utf8>>} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_in_comment,
                        <<""/utf8>>
                    );

                {parse_mode_search, _@1, <<"\""/utf8>>} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_in_string,
                        <<""/utf8>>
                    );

                {parse_mode_search, Collected@1, Char@1} when ((((((Collected@1 =:= <<""/utf8>>) andalso (Char@1 =:= <<"i"/utf8>>)) orelse ((Collected@1 =:= <<"i"/utf8>>) andalso (Char@1 =:= <<"m"/utf8>>))) orelse ((Collected@1 =:= <<"im"/utf8>>) andalso (Char@1 =:= <<"p"/utf8>>))) orelse ((Collected@1 =:= <<"imp"/utf8>>) andalso (Char@1 =:= <<"o"/utf8>>))) orelse ((Collected@1 =:= <<"impo"/utf8>>) andalso (Char@1 =:= <<"r"/utf8>>))) orelse ((Collected@1 =:= <<"impor"/utf8>>) andalso (Char@1 =:= <<"t"/utf8>>)) ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_search,
                        <<Collected@1/binary, Char@1/binary>>
                    );

                {parse_mode_search, <<"import"/utf8>>, Char@2} when (((Char@2 =:= <<" "/utf8>>) orelse (Char@2 =:= <<"\t"/utf8>>)) orelse (Char@2 =:= <<"\n"/utf8>>)) orelse (Char@2 =:= <<"\r\n"/utf8>>) ->
                    {Rest_chars@1, New_import} = parse_import_chars(
                        Rest_chars,
                        gleam@string_builder:new()
                    ),
                    New_import@1 = gleam@string_builder:to_string(New_import),
                    Updated_imports = [New_import@1 | Imports],
                    parse_module_string(
                        Rest_chars@1,
                        Updated_imports,
                        parse_mode_search,
                        <<""/utf8>>
                    );

                {parse_mode_search, <<"import\r"/utf8>>, <<"\n"/utf8>>} ->
                    {Rest_chars@2, New_import@2} = parse_import_chars(
                        Rest_chars,
                        gleam@string_builder:new()
                    ),
                    Imports@1 = [gleam@string_builder:to_string(New_import@2) |
                        Imports],
                    parse_module_string(
                        Rest_chars@2,
                        Imports@1,
                        parse_mode_search,
                        <<""/utf8>>
                    );

                {parse_mode_search, _@2, _@3} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_search,
                        <<""/utf8>>
                    );

                {parse_mode_in_comment, _@4, <<"\n"/utf8>>} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_search,
                        <<""/utf8>>
                    );

                {parse_mode_in_comment, _@5, <<"\r"/utf8>>} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_search,
                        <<""/utf8>>
                    );

                {parse_mode_in_comment, _@6, <<"\r\n"/utf8>>} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_search,
                        <<""/utf8>>
                    );

                {parse_mode_in_comment, _@7, _@8} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_in_comment,
                        <<""/utf8>>
                    );

                {parse_mode_in_string, <<"\\"/utf8>>, _@9} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_in_string,
                        <<""/utf8>>
                    );

                {parse_mode_in_string, _@10, <<"\""/utf8>>} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_search,
                        <<""/utf8>>
                    );

                {parse_mode_in_string, _@11, <<"\\"/utf8>>} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_in_string,
                        <<"\\"/utf8>>
                    );

                {parse_mode_in_string, _@12, _@13} ->
                    parse_module_string(
                        Rest_chars,
                        Imports,
                        parse_mode_in_string,
                        <<""/utf8>>
                    )
            end
    end.

-spec parse_import_chars(list(binary()), gleam@string_builder:string_builder()) -> {list(binary()),
    gleam@string_builder:string_builder()}.
parse_import_chars(Chars, Import_module) ->
    case Chars of
        [] ->
            {[], Import_module};

        [<<"\r\n"/utf8>> | Rest_chars] ->
            {Rest_chars, Import_module};

        [<<"\n"/utf8>> | Rest_chars@1] ->
            {Rest_chars@1, Import_module};

        [Char | Rest_chars@2] when ((((Char =:= <<" "/utf8>>) orelse (Char =:= <<"\t"/utf8>>)) orelse (Char =:= <<"\r"/utf8>>)) orelse (Char =:= <<"\n"/utf8>>)) orelse (Char =:= <<"\r\n"/utf8>>) ->
            parse_import_chars(Rest_chars@2, Import_module);

        [Char@1 | Rest_chars@3] ->
            parse_import_chars(
                Rest_chars@3,
                gleam@string_builder:append(Import_module, Char@1)
            )
    end.

-spec derive_test_modules_from_src_import_dependencies(list(binary())) -> list(binary()).
derive_test_modules_from_src_import_dependencies(Src_modules) ->
    Project_test_files = find_project_files(<<"test"/utf8>>),
    All_test_modules = begin
        _pipe = Project_test_files,
        gleam@list:map(
            _pipe,
            fun(Module_name_dot_gleam) ->
                {ok, {Module_name@1, _@2}} = case gleam@string:split_once(
                    Module_name_dot_gleam,
                    <<".gleam"/utf8>>
                ) of
                    {ok, {Module_name, _@1}} -> {ok, {Module_name, _@1}};
                    _try ->
                        erlang:error(#{gleam_error => assert,
                                    message => <<"Assertion pattern match failed"/utf8>>,
                                    value => _try,
                                    module => <<"glacier"/utf8>>,
                                    function => <<"derive_test_modules_from_src_import_dependencies"/utf8>>,
                                    line => 304})
                end,
                Module_name@1
            end
        )
    end,
    Dirty_test_modules = begin
        _pipe@1 = All_test_modules,
        gleam@list:filter(
            _pipe@1,
            fun(Test_module) ->
                Test_module_imports = derive_src_imports_off_test_module(
                    Test_module
                ),
                gleam@list:any(
                    Src_modules,
                    fun(Src_module) ->
                        _pipe@2 = Test_module_imports,
                        gleam@list:contains(_pipe@2, Src_module)
                    end
                )
            end
        )
    end,
    Dirty_test_modules.

-spec derive_src_imports_off_test_module(binary()) -> list(binary()).
derive_src_imports_off_test_module(Test_module_name) ->
    _pipe = Test_module_name,
    _pipe@1 = module_name_to_file_name(_pipe, test_module_kind),
    parse_module_for_imports(_pipe@1).

-spec module_name_to_file_name(binary(), module_kind()) -> binary().
module_name_to_file_name(Module_name, Module_kind) ->
    case Module_kind of
        src_module_kind ->
            <<<<<<(get_src_dir())/binary, "/"/utf8>>/binary,
                    Module_name/binary>>/binary,
                ".gleam"/utf8>>;

        test_module_kind ->
            <<<<<<(get_test_dir())/binary, "/"/utf8>>/binary,
                    Module_name/binary>>/binary,
                ".gleam"/utf8>>
    end.

-spec file_name_to_module_name(binary(), module_kind()) -> binary().
file_name_to_module_name(Module_name, Module_kind) ->
    {ok, {_@2, Module_name_dot_gleam@1}} = case case Module_kind of
        src_module_kind ->
            gleam@string:split_once(
                Module_name,
                <<(get_src_dir())/binary, "/"/utf8>>
            );

        test_module_kind ->
            gleam@string:split_once(
                Module_name,
                <<(get_test_dir())/binary, "/"/utf8>>
            )
    end of
        {ok, {_@1, Module_name_dot_gleam}} -> {ok, {_@1, Module_name_dot_gleam}};
        _try ->
            erlang:error(#{gleam_error => assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _try,
                        module => <<"glacier"/utf8>>,
                        function => <<"file_name_to_module_name"/utf8>>,
                        line => 346})
    end,
    case gleam@string:ends_with(Module_name, <<".erl"/utf8>>) of
        true ->
            {ok, {Module_name@2, _@4}} = case gleam@string:split_once(
                Module_name_dot_gleam@1,
                <<".erl"/utf8>>
            ) of
                {ok, {Module_name@1, _@3}} -> {ok, {Module_name@1, _@3}};
                _try@1 ->
                    erlang:error(#{gleam_error => assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _try@1,
                                module => <<"glacier"/utf8>>,
                                function => <<"file_name_to_module_name"/utf8>>,
                                line => 352})
            end,
            Module_name@2;

        false ->
            {ok, {Module_name@4, _@6}} = case gleam@string:split_once(
                Module_name_dot_gleam@1,
                <<".gleam"/utf8>>
            ) of
                {ok, {Module_name@3, _@5}} -> {ok, {Module_name@3, _@5}};
                _try@2 ->
                    erlang:error(#{gleam_error => assert,
                                message => <<"Assertion pattern match failed"/utf8>>,
                                value => _try@2,
                                module => <<"glacier"/utf8>>,
                                function => <<"file_name_to_module_name"/utf8>>,
                                line => 357})
            end,
            Module_name@4
    end.

-spec file_exists(binary()) -> boolean().
file_exists(Absolute_file_name) ->
    filelib:is_regular(Absolute_file_name).

-spec find_project_files(binary()) -> list(binary()).
find_project_files(Sub_directory) ->
    do_find_project_files(Sub_directory).

-spec target() -> target().
target() ->
    do_target().

-spec start_args() -> list(binary()).
start_args() ->
    do_start_args().

-spec get_cwd() -> binary().
get_cwd() ->
    glacier_ffi:get_cwd_as_binary().

-spec get_src_dir() -> binary().
get_src_dir() ->
    <<(get_cwd())/binary, "/src"/utf8>>.

-spec get_test_dir() -> binary().
get_test_dir() ->
    <<(get_cwd())/binary, "/test"/utf8>>.

-spec to_relative_path(binary()) -> binary().
to_relative_path(Path) ->
    {ok, {_@2, Relative_file_name@1}} = case gleam@string:split_once(
        Path,
        <<(get_cwd())/binary, "/"/utf8>>
    ) of
        {ok, {_@1, Relative_file_name}} -> {ok, {_@1, Relative_file_name}};
        _try ->
            erlang:error(#{gleam_error => assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _try,
                        module => <<"glacier"/utf8>>,
                        function => <<"to_relative_path"/utf8>>,
                        line => 409})
    end,
    Relative_file_name@1.

-spec do_target() -> target().
do_target() ->
    erlang_target.

-spec do_start_args() -> list(binary()).
do_start_args() ->
    gleam@erlang:start_arguments().

-spec read_module_file(binary()) -> binary().
read_module_file(Module_path) ->
    {ok, Contents@1} = case gleam@erlang@file:read(Module_path) of
        {ok, Contents} -> {ok, Contents};
        _try ->
            erlang:error(#{gleam_error => assert,
                        message => <<"Assertion pattern match failed"/utf8>>,
                        value => _try,
                        module => <<"glacier"/utf8>>,
                        function => <<"read_module_file"/utf8>>,
                        line => 432})
    end,
    Contents@1.

-spec do_find_project_files(binary()) -> list(binary()).
do_find_project_files(In) ->
    glacier_ffi:find_files_recursive(In, <<"**/*.{gleam}"/utf8>>).