-module(hanguleam@parser).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).
-define(FILEPATH, "src/hanguleam/parser.gleam").
-export([disassemble_complete_character/1, disassemble/1, disassemble_to_groups/1]).
-export_type([disassemble_error/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.

-type disassemble_error() :: incomplete_hangul |
    non_hangul_character |
    empty_string.

-file("src/hanguleam/parser.gleam", 96).
-spec syllable_to_components(hanguleam@types:hangul_syllable()) -> list(binary()).
syllable_to_components(Syllable) ->
    {hangul_syllable, {choseong, Cho}, {jungseong, Jung}, {jongseong, Jong}} = Syllable,
    _pipe = [Cho],
    _pipe@1 = lists:append(_pipe, gleam@string:to_graphemes(Jung)),
    (fun(Base) -> case Jong of
            <<""/utf8>> ->
                Base;

            _ ->
                lists:append(Base, gleam@string:to_graphemes(Jong))
        end end)(_pipe@1).

-file("src/hanguleam/parser.gleam", 108).
-spec disassemble_jamo(binary()) -> list(binary()).
disassemble_jamo(Char) ->
    case hanguleam@internal@character:parse_hangul_jamo(Char) of
        {ok, {consonant, Components}} ->
            gleam@string:split(Components, <<""/utf8>>);

        {ok, {vowel, Components}} ->
            gleam@string:split(Components, <<""/utf8>>);

        {error, _} ->
            []
    end.

-file("src/hanguleam/parser.gleam", 148).
?DOC(
    " Disassembles a single complete Korean Hangul character into its constituent parts.\n"
    " This function only works with complete Hangul syllables (가-힣 range) and returns\n"
    " detailed information about the choseong (initial), jungseong (medial), and jongseong (final) components.\n"
    "\n"
    " ## Return Value\n"
    "\n"
    " - `Ok(HangulSyllable)`: Contains the disassembled components\n"
    "   - `choseong`: Initial consonant (e.g., \"ㄱ\")\n"
    "   - `jungseong`: Medial vowel (e.g., \"ㅏ\") \n"
    "   - `jongseong`: Final consonant(s) (e.g., \"ㅂㅅ\" or \"\" if none)\n"
    " - `Error(IncompleteHangul)`: Input is a Hangul jamo but not a complete syllable\n"
    " - `Error(NonHangulCharacter)`: Input is not a Korean character\n"
    " - `Error(EmptyString)`: Input string is empty\n"
    "\n"
    " ## Examples\n"
    "\n"
    " ```gleam\n"
    " disassemble_complete_character(\"값\")\n"
    " // -> Ok(HangulSyllable(Choseong(\"ㄱ\"), Jungseong(\"ㅏ\"), Jongseong(\"ㅂㅅ\")))\n"
    "\n"
    " disassemble_complete_character(\"리\")\n"
    " // -> Ok(HangulSyllable(Choseong(\"ㄹ\"), Jungseong(\"ㅣ\"), Jongseong(\"\")))\n"
    "\n"
    " disassemble_complete_character(\"ㅏ\")\n"
    " // -> Error(IncompleteHangul)\n"
    "\n"
    " disassemble_complete_character(\"a\")\n"
    " // -> Error(NonHangulCharacter)\n"
    "\n"
    " disassemble_complete_character(\"\")\n"
    " // -> Error(EmptyString)\n"
    " ```\n"
).
-spec disassemble_complete_character(binary()) -> {ok,
        hanguleam@types:hangul_syllable()} |
    {error, disassemble_error()}.
disassemble_complete_character(Char) ->
    case hanguleam@internal@character:get_character_type(Char) of
        empty ->
            {error, empty_string};

        non_hangul ->
            {error, non_hangul_character};

        {incomplete_hangul, _} ->
            {error, incomplete_hangul};

        {complete_hangul, Char@1} ->
            {ok, Char@1}
    end.

-file("src/hanguleam/parser.gleam", 87).
-spec disassemble_char_to_groups(binary()) -> list(binary()).
disassemble_char_to_groups(Char) ->
    case disassemble_complete_character(Char) of
        {ok, Syllable} ->
            syllable_to_components(Syllable);

        {error, incomplete_hangul} ->
            disassemble_jamo(Char);

        {error, non_hangul_character} ->
            [Char];

        {error, empty_string} ->
            [Char]
    end.

-file("src/hanguleam/parser.gleam", 41).
-spec do_disassemble(binary(), binary()) -> binary().
do_disassemble(Text, Accumulator) ->
    case gleam_stdlib:string_pop_grapheme(Text) of
        {ok, {Head, Tail}} ->
            Components = begin
                _pipe = disassemble_char_to_groups(Head),
                gleam@string:join(_pipe, <<""/utf8>>)
            end,
            do_disassemble(Tail, <<Accumulator/binary, Components/binary>>);

        {error, _} ->
            Accumulator
    end.

-file("src/hanguleam/parser.gleam", 37).
?DOC(
    " Disassembles Korean Hangul characters into their constituent jamo (consonants and vowels).\n"
    " This function breaks down complete Hangul syllables and individual jamo into their basic components.\n"
    " Non-Korean characters and whitespace are preserved as-is.\n"
    "\n"
    " ## Examples\n"
    "\n"
    " ```gleam\n"
    " disassemble(\"값\")\n"
    " // -> \"ㄱㅏㅂㅅ\"\n"
    "\n"
    " disassemble(\"값이 비싸다\")\n"
    " // -> \"ㄱㅏㅂㅅㅇㅣ ㅂㅣㅆㅏㄷㅏ\"\n"
    "\n"
    " disassemble(\"ㅘ\")\n"
    " // -> \"ㅗㅏ\"\n"
    "\n"
    " disassemble(\"ㄵ\")\n"
    " // -> \"ㄴㅈ\"\n"
    "\n"
    " disassemble(\"hello 안녕\")\n"
    " // -> \"hello ㅇㅏㄴㄴㅕㅇ\"\n"
    " ```\n"
).
-spec disassemble(binary()) -> binary().
disassemble(Text) ->
    do_disassemble(Text, <<""/utf8>>).

-file("src/hanguleam/parser.gleam", 74).
-spec do_disassemble_to_groups(binary(), list(list(binary()))) -> list(list(binary())).
do_disassemble_to_groups(Text, Accumulator) ->
    case gleam_stdlib:string_pop_grapheme(Text) of
        {ok, {Head, Tail}} ->
            Group = disassemble_char_to_groups(Head),
            do_disassemble_to_groups(Tail, [Group | Accumulator]);

        {error, _} ->
            Accumulator
    end.

-file("src/hanguleam/parser.gleam", 70).
?DOC(
    " Disassembles Korean Hangul characters into groups of jamo components.\n"
    " Unlike `disassemble`, this function returns a 2D array where each character\n"
    " is represented as a separate array of its constituent jamo.\n"
    "\n"
    " ## Examples\n"
    "\n"
    " ```gleam\n"
    " disassemble_to_groups(\"사과\")\n"
    " // -> [[\"ㅅ\", \"ㅏ\"], [\"ㄱ\", \"ㅗ\", \"ㅏ\"]]\n"
    "\n"
    " disassemble_to_groups(\"ㅘ\")\n"
    " // -> [[\"ㅗ\", \"ㅏ\"]]\n"
    "\n"
    " disassemble_to_groups(\"ㄵ\")\n"
    " // -> [[\"ㄴ\", \"ㅈ\"]]\n"
    "\n"
    " disassemble_to_groups(\"hello\")\n"
    " // -> [[\"h\"], [\"e\"], [\"l\"], [\"l\"], [\"o\"]]\n"
    " ```\n"
).
-spec disassemble_to_groups(binary()) -> list(list(binary())).
disassemble_to_groups(Text) ->
    _pipe = do_disassemble_to_groups(Text, []),
    lists:reverse(_pipe).