-module(fio).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/fio.gleam").
-export([read/1, read_bits/1, write/2, write_bits/2, append/2, append_bits/2, write_atomic/2, write_bits_atomic/2, delete/1, delete_directory/1, delete_all/1, exists/1, file_info/1, link_info/1, is_directory/1, is_file/1, is_symlink/1, copy/2, rename/2, create_symlink/2, create_hard_link/2, read_link/1, set_permissions/2, set_permissions_octal/2, create_directory/1, create_directory_all/1, list/1, current_directory/0, tmp_dir/0, touch/1, with_temp_file/1, with_temp_directory/1, list_recursive/1, copy_directory/2, ensure_file/1, copy_if_newer/2, read_fold/4, checksum/2, verify_checksum/3, join/2, split/1, base_name/1, directory_name/1, extension/1, strip_extension/1, stem/1, with_extension/2, join_all/1, is_absolute/1, expand/1, safe_relative/1, with_opened/3, with_writer/2, write_new/2, write_if_changed/2, read_lines/1, write_lines/2, stream_bytes/1, stream/1, explain/1, atomic/2]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

-file("src/fio.gleam", 15).
?DOC(" Read a UTF-8 text file. Returns `NotUtf8(path)` on invalid UTF-8.\n").
-spec read(binary()) -> {ok, binary()} | {error, fio@error:fio_error()}.
read(Path) ->
    fio@internal@io:read(Path).

-file("src/fio.gleam", 20).
?DOC(" Read a file as raw bytes (`BitArray`).\n").
-spec read_bits(binary()) -> {ok, bitstring()} | {error, fio@error:fio_error()}.
read_bits(Path) ->
    fio@internal@io:read_bits(Path).

-file("src/fio.gleam", 27).
?DOC(" Write UTF-8 text to a file (creates/overwrites).\n").
-spec write(binary(), binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
write(Path, Content) ->
    fio@internal@io:write(Path, Content).

-file("src/fio.gleam", 32).
?DOC(" Write raw bytes (`BitArray`) to a file (creates/overwrites).\n").
-spec write_bits(binary(), bitstring()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
write_bits(Path, Content) ->
    fio@internal@io:write_bits(Path, Content).

-file("src/fio.gleam", 37).
?DOC(" Append UTF-8 text to a file (creates if missing).\n").
-spec append(binary(), binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
append(Path, Content) ->
    fio@internal@io:append(Path, Content).

-file("src/fio.gleam", 42).
?DOC(" Append raw bytes (`BitArray`) to a file.\n").
-spec append_bits(binary(), bitstring()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
append_bits(Path, Content) ->
    fio@internal@io:append_bits(Path, Content).

-file("src/fio.gleam", 49).
?DOC(
    " Write UTF-8 text atomically: writes to a sibling temp file, then renames\n"
    " it into place with a single `rename(2)` syscall.\n"
    " Readers never observe partial content. Returns `AtomicFailed` on error.\n"
).
-spec write_atomic(binary(), binary()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
write_atomic(Path, Content) ->
    fio@internal@io:write_atomic(Path, Content).

-file("src/fio.gleam", 55).
?DOC(
    " Write raw bytes (`BitArray`) atomically.\n"
    " Same atomic guarantee as `write_atomic`.\n"
).
-spec write_bits_atomic(binary(), bitstring()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
write_bits_atomic(Path, Content) ->
    fio@internal@io:write_bits_atomic(Path, Content).

-file("src/fio.gleam", 65).
?DOC(" Delete a file (not a directory).\n").
-spec delete(binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
delete(Path) ->
    fio@internal@io:delete_file(Path).

-file("src/fio.gleam", 70).
?DOC(" Delete an empty directory.\n").
-spec delete_directory(binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
delete_directory(Path) ->
    fio@internal@io:delete_directory(Path).

-file("src/fio.gleam", 75).
?DOC(" Delete a path recursively; idempotent (succeeds if missing).\n").
-spec delete_all(binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
delete_all(Path) ->
    fio@internal@io:delete_recursive(Path).

-file("src/fio.gleam", 82).
?DOC(" Check if a path exists (file, directory, or symlink).\n").
-spec exists(binary()) -> boolean().
exists(Path) ->
    fio@internal@io:exists(Path).

-file("src/fio.gleam", 87).
?DOC(" Get file metadata (follows symlinks).\n").
-spec file_info(binary()) -> {ok, fio@types:file_info()} |
    {error, fio@error:fio_error()}.
file_info(Path) ->
    fio@internal@io:file_info(Path).

-file("src/fio.gleam", 92).
?DOC(" Get file metadata without following symlinks.\n").
-spec link_info(binary()) -> {ok, fio@types:file_info()} |
    {error, fio@error:fio_error()}.
link_info(Path) ->
    fio@internal@io:link_info(Path).

-file("src/fio.gleam", 97).
?DOC(" Check if a path is a directory (follows symlinks).\n").
-spec is_directory(binary()) -> {ok, boolean()} | {error, fio@error:fio_error()}.
is_directory(Path) ->
    fio@internal@io:is_directory(Path).

-file("src/fio.gleam", 102).
?DOC(" Check if a path is a regular file (follows symlinks).\n").
-spec is_file(binary()) -> {ok, boolean()} | {error, fio@error:fio_error()}.
is_file(Path) ->
    fio@internal@io:is_file(Path).

-file("src/fio.gleam", 107).
?DOC(" Check if a path is a symbolic link (does not follow symlinks).\n").
-spec is_symlink(binary()) -> {ok, boolean()} | {error, fio@error:fio_error()}.
is_symlink(Path) ->
    fio@internal@io:is_symlink(Path).

-file("src/fio.gleam", 114).
?DOC(" Copy a file from source to destination.\n").
-spec copy(binary(), binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
copy(Src, Dest) ->
    fio@internal@io:copy_file(Src, Dest).

-file("src/fio.gleam", 119).
?DOC(" Rename or move a file or directory.\n").
-spec rename(binary(), binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
rename(Src, Dest) ->
    fio@internal@io:rename(Src, Dest).

-file("src/fio.gleam", 126).
?DOC(" Create a symbolic link.\n").
-spec create_symlink(binary(), binary()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
create_symlink(Target, Link) ->
    fio@internal@io:create_symlink(Target, Link).

-file("src/fio.gleam", 134).
?DOC(" Create a hard link to an existing file.\n").
-spec create_hard_link(binary(), binary()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
create_hard_link(Target, Link) ->
    fio@internal@io:create_hard_link(Target, Link).

-file("src/fio.gleam", 142).
?DOC(" Read the target path of a symbolic link.\n").
-spec read_link(binary()) -> {ok, binary()} | {error, fio@error:fio_error()}.
read_link(Path) ->
    fio@internal@io:read_link(Path).

-file("src/fio.gleam", 149).
?DOC(" Set file permissions using the `FilePermissions` type.\n").
-spec set_permissions(binary(), fio@types:file_permissions()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
set_permissions(Path, Permissions) ->
    fio@internal@io:set_permissions(Path, Permissions).

-file("src/fio.gleam", 157).
?DOC(" Set file permissions with an octal integer.\n").
-spec set_permissions_octal(binary(), integer()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
set_permissions_octal(Path, Mode) ->
    fio@internal@io:set_permissions_octal(Path, Mode).

-file("src/fio.gleam", 164).
?DOC(" Create a directory. Parent directory must exist.\n").
-spec create_directory(binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
create_directory(Path) ->
    fio@internal@io:create_directory(Path).

-file("src/fio.gleam", 169).
?DOC(" Create a directory and all parent directories.\n").
-spec create_directory_all(binary()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
create_directory_all(Path) ->
    fio@internal@io:create_directory_all(Path).

-file("src/fio.gleam", 174).
?DOC(" List the contents of a directory (names only).\n").
-spec list(binary()) -> {ok, list(binary())} | {error, fio@error:fio_error()}.
list(Path) ->
    fio@internal@io:list_directory(Path).

-file("src/fio.gleam", 181).
?DOC(" Get the current working directory.\n").
-spec current_directory() -> {ok, binary()} | {error, fio@error:fio_error()}.
current_directory() ->
    fio@internal@io:current_directory().

-file("src/fio.gleam", 186).
?DOC(" Get the system temporary directory path.\n").
-spec tmp_dir() -> binary().
tmp_dir() ->
    fio@internal@io:tmp_dir().

-file("src/fio.gleam", 191).
?DOC(" Touch a file: create or update modification time.\n").
-spec touch(binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
touch(Path) ->
    fio@internal@io:touch(Path).

-file("src/fio.gleam", 199).
?DOC(
    " Run a callback with a path to a temporary file that is automatically\n"
    " deleted when the callback returns (even if it returns an Error).\n"
).
-spec with_temp_file(
    fun((binary()) -> {ok, EWV} | {error, fio@error:fio_error()})
) -> {ok, EWV} | {error, fio@error:fio_error()}.
with_temp_file(Callback) ->
    Path = fio@path:join(
        fio@internal@io:tmp_dir(),
        fio_ffi:unique_name(<<"fio_tmp_file_"/utf8>>)
    ),
    Result = Callback(Path),
    _ = fio@internal@io:delete_file(Path),
    Result.

-file("src/fio.gleam", 212).
?DOC(
    " Run a callback with a path to a temporary directory that is automatically\n"
    " deleted (recursively) when the callback returns.\n"
).
-spec with_temp_directory(
    fun((binary()) -> {ok, EXA} | {error, fio@error:fio_error()})
) -> {ok, EXA} | {error, fio@error:fio_error()}.
with_temp_directory(Callback) ->
    Path = fio@path:join(
        fio@internal@io:tmp_dir(),
        fio_ffi:unique_name(<<"fio_tmp_dir_"/utf8>>)
    ),
    Result = begin
        _pipe = fio@internal@io:create_directory(Path),
        gleam@result:'try'(_pipe, fun(_) -> Callback(Path) end)
    end,
    _ = fio@internal@io:delete_recursive(Path),
    Result.

-file("src/fio.gleam", 228).
?DOC(" Recursively list files and directories (paths relative to `path`).\n").
-spec list_recursive(binary()) -> {ok, list(binary())} |
    {error, fio@error:fio_error()}.
list_recursive(Path) ->
    fio@recursive:list_recursive(Path).

-file("src/fio.gleam", 233).
?DOC(" Recursively copy a directory and its contents.\n").
-spec copy_directory(binary(), binary()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
copy_directory(Src, Dest) ->
    fio@recursive:copy_directory(Src, Dest).

-file("src/fio.gleam", 241).
?DOC(
    " Create a file if it does not already exist.\n"
    " If the file already exists this is a no-op and returns `Ok(Nil)`.\n"
).
-spec ensure_file(binary()) -> {ok, nil} | {error, fio@error:fio_error()}.
ensure_file(Path) ->
    case fio@internal@io:exists(Path) of
        true ->
            {ok, nil};

        false ->
            fio@internal@io:write(Path, <<""/utf8>>)
    end.

-file("src/fio.gleam", 252).
?DOC(
    " Copy `src` to `dest` only when `src` is newer than `dest`.\n"
    "\n"
    " If `dest` does not exist the copy always happens.\n"
    " Returns `Ok(True)` when a copy was performed, `Ok(False)` when skipped.\n"
).
-spec copy_if_newer(binary(), binary()) -> {ok, boolean()} |
    {error, fio@error:fio_error()}.
copy_if_newer(Src, Dest) ->
    gleam@result:'try'(
        fio@internal@io:file_info(Src),
        fun(Src_info) -> case fio@internal@io:file_info(Dest) of
                {error, enoent} ->
                    gleam@result:'try'(
                        fio@internal@io:copy_file(Src, Dest),
                        fun(_) -> {ok, true} end
                    );

                {error, E} ->
                    {error, E};

                {ok, Dest_info} ->
                    case erlang:element(10, Src_info) > erlang:element(
                        10,
                        Dest_info
                    ) of
                        false ->
                            {ok, false};

                        true ->
                            gleam@result:'try'(
                                fio@internal@io:copy_file(Src, Dest),
                                fun(_) -> {ok, true} end
                            )
                    end
            end end
    ).

-file("src/fio.gleam", 284).
?DOC(
    " Read a file in chunks, folding each chunk into an accumulator.\n"
    "\n"
    " Opens the file, reads it in `chunk_size`-byte pieces, and calls `f` on each\n"
    " chunk until EOF. The file handle is always closed before returning.\n"
    "\n"
    " ```gleam\n"
    " // Count bytes without loading the whole file into memory\n"
    " fio.read_fold(\"big.bin\", 65_536, 0, fn(acc, chunk) {\n"
    "   acc + bit_array.byte_size(chunk)\n"
    " })\n"
    " ```\n"
).
-spec read_fold(binary(), integer(), EXO, fun((EXO, bitstring()) -> EXO)) -> {ok,
        EXO} |
    {error, fio@error:fio_error()}.
read_fold(Path, Chunk_size, Initial, F) ->
    fio@handle:with(
        Path,
        read_only,
        fun(H) -> fio@handle:fold_chunks(H, Chunk_size, Initial, F) end
    ).

-file("src/fio.gleam", 298).
?DOC(
    " Compute a file checksum using the specified algorithm.\n"
    " Returns a hex-encoded string.\n"
).
-spec checksum(binary(), fio@types:hash_algorithm()) -> {ok, binary()} |
    {error, fio@error:fio_error()}.
checksum(Path, Algorithm) ->
    Algo_str = case Algorithm of
        sha256 ->
            <<"sha256"/utf8>>;

        sha512 ->
            <<"sha512"/utf8>>;

        md5 ->
            <<"md5"/utf8>>
    end,
    fio@internal@io:checksum(Path, Algo_str).

-file("src/fio.gleam", 311).
?DOC(" Verify that a file's checksum matches the expected hex-encoded hash.\n").
-spec verify_checksum(binary(), binary(), fio@types:hash_algorithm()) -> {ok,
        boolean()} |
    {error, fio@error:fio_error()}.
verify_checksum(Path, Expected, Algorithm) ->
    _pipe = checksum(Path, Algorithm),
    gleam@result:map(_pipe, fun(Actual) -> Actual =:= Expected end).

-file("src/fio.gleam", 323).
?DOC(" Join two path segments.\n").
-spec join(binary(), binary()) -> binary().
join(Left, Right) ->
    fio@path:join(Left, Right).

-file("src/fio.gleam", 328).
?DOC(" Split a path into its segments.\n").
-spec split(binary()) -> list(binary()).
split(Path_str) ->
    fio@path:split(Path_str).

-file("src/fio.gleam", 333).
?DOC(" Get the base name (filename) of a path.\n").
-spec base_name(binary()) -> binary().
base_name(Path_str) ->
    fio@path:base_name(Path_str).

-file("src/fio.gleam", 338).
?DOC(" Get the directory portion of a path.\n").
-spec directory_name(binary()) -> binary().
directory_name(Path_str) ->
    fio@path:directory_name(Path_str).

-file("src/fio.gleam", 343).
?DOC(" Get the file extension (without dot).\n").
-spec extension(binary()) -> {ok, binary()} | {error, nil}.
extension(Path_str) ->
    fio@path:extension(Path_str).

-file("src/fio.gleam", 348).
?DOC(" Remove the extension from a path.\n").
-spec strip_extension(binary()) -> binary().
strip_extension(Path_str) ->
    fio@path:strip_extension(Path_str).

-file("src/fio.gleam", 353).
?DOC(" Get the stem (filename without extension).\n").
-spec stem(binary()) -> binary().
stem(Path_str) ->
    fio@path:stem(Path_str).

-file("src/fio.gleam", 358).
?DOC(" Change the extension of a path.\n").
-spec with_extension(binary(), binary()) -> binary().
with_extension(Path_str, Ext) ->
    fio@path:with_extension(Path_str, Ext).

-file("src/fio.gleam", 363).
?DOC(" Join a list of path segments.\n").
-spec join_all(list(binary())) -> binary().
join_all(Segments) ->
    fio@path:join_all(Segments).

-file("src/fio.gleam", 368).
?DOC(" Check if a path is absolute.\n").
-spec is_absolute(binary()) -> boolean().
is_absolute(Path_str) ->
    fio@path:is_absolute(Path_str).

-file("src/fio.gleam", 374).
?DOC(
    " Expand/normalize a path, resolving `.` and `..` segments.\n"
    " Returns `Error(Nil)` if `..` would go above the root.\n"
).
-spec expand(binary()) -> {ok, binary()} | {error, nil}.
expand(Path_str) ->
    fio@path:expand(Path_str).

-file("src/fio.gleam", 380).
?DOC(
    " Validate that a path is a safe relative path (does not escape root).\n"
    " On Windows it also normalizes backslashes into `/`.\n"
).
-spec safe_relative(binary()) -> {ok, binary()} | {error, nil}.
safe_relative(Path_str) ->
    fio@path:safe_relative(Path_str).

-file("src/fio.gleam", 390).
?DOC(
    " Evaluates a callback with an opened file handle and guarantees the handle\n"
    " is closed at the end, even in case of errors.\n"
).
-spec with_opened(
    binary(),
    fio@handle:open_mode(),
    fun((fio@handle:file_handle()) -> {ok, EYD} | {error, fio@error:fio_error()})
) -> {ok, EYD} | {error, fio@error:fio_error()}.
with_opened(Path, Mode, Callback) ->
    fio@handle:with(Path, Mode, Callback).

-file("src/fio.gleam", 400).
?DOC(
    " Evaluates a callback with a file handle opened for writing and guarantees\n"
    " the handle is closed at the end.\n"
).
-spec with_writer(
    binary(),
    fun((fio@handle:file_handle()) -> {ok, EYI} | {error, fio@error:fio_error()})
) -> {ok, EYI} | {error, fio@error:fio_error()}.
with_writer(Path, Callback) ->
    fio@handle:with(Path, write_only, Callback).

-file("src/fio.gleam", 413).
?DOC(
    " Writes content to a file only if it doesn't exist yet. Returns an `Eexist`\n"
    " error if it does.\n"
).
-spec write_new(binary(), binary()) -> {ok, nil} |
    {error, fio@error:fio_error()}.
write_new(Path, Content) ->
    case exists(Path) of
        true ->
            {error, eexist};

        false ->
            write(Path, Content)
    end.

-file("src/fio.gleam", 422).
?DOC(
    " Writes content to a file. If the file already has identical content, it\n"
    " skips rewriting and returns `False`. If it overwrote or created, returns `True`.\n"
).
-spec write_if_changed(binary(), binary()) -> {ok, boolean()} |
    {error, fio@error:fio_error()}.
write_if_changed(Path, Content) ->
    case read(Path) of
        {ok, Existing} when Existing =:= Content ->
            {ok, false};

        _ ->
            gleam@result:'try'(write(Path, Content), fun(_) -> {ok, true} end)
    end.

-file("src/fio.gleam", 438).
?DOC(
    " Reads a file and splits it into lines.\n"
    " Both `\\n` (Unix) and `\\r\\n` (Windows) line endings are normalised.\n"
).
-spec read_lines(binary()) -> {ok, list(binary())} |
    {error, fio@error:fio_error()}.
read_lines(Path) ->
    gleam@result:'try'(
        read(Path),
        fun(Content) ->
            {ok,
                gleam@string:split(
                    gleam@string:replace(
                        Content,
                        <<"\r\n"/utf8>>,
                        <<"\n"/utf8>>
                    ),
                    <<"\n"/utf8>>
                )}
        end
    ).

-file("src/fio.gleam", 444).
?DOC(" Joins lines with newlines and writes to a file.\n").
-spec write_lines(binary(), list(binary())) -> {ok, nil} |
    {error, fio@error:fio_error()}.
write_lines(Path, Lines) ->
    Content = gleam@string:join(Lines, <<"\n"/utf8>>),
    write(Path, Content).

-file("src/fio.gleam", 455).
?DOC(
    " Reads a file in chunks and returns all chunks as a list of `BitArray`.\n"
    " Uses a 64 KiB chunk size. Returns `Error` if the file cannot be opened.\n"
).
-spec stream_bytes(binary()) -> {ok, list(bitstring())} |
    {error, fio@error:fio_error()}.
stream_bytes(Path) ->
    _pipe = read_fold(Path, 65536, [], fun(Acc, Chunk) -> [Chunk | Acc] end),
    gleam@result:map(_pipe, fun lists:reverse/1).

-file("src/fio.gleam", 462).
?DOC(
    " Reads a file in chunks and returns all chunks as a list of `String`.\n"
    " Returns `Error(NotUtf8)` if any chunk is not valid UTF-8.\n"
).
-spec stream(binary()) -> {ok, list(binary())} | {error, fio@error:fio_error()}.
stream(Path) ->
    gleam@result:'try'(
        stream_bytes(Path),
        fun(Chunks) ->
            _pipe = gleam@list:map(
                Chunks,
                fun(Bits) -> case gleam@bit_array:to_string(Bits) of
                        {ok, S} ->
                            {ok, S};

                        {error, _} ->
                            {error, {not_utf8, Path}}
                    end end
            ),
            gleam@result:all(_pipe)
        end
    ).

-file("src/fio.gleam", 478).
?DOC(" Explains a FioError in a CLI-friendly format.\n").
-spec explain(fio@error:fio_error()) -> binary().
explain(Err) ->
    fio@error:describe(Err).

-file("src/fio.gleam", 490).
?DOC(
    " Executes a callback providing a temporary file path to write to.\n"
    " If the callback succeeds, the temporary file is atomically renamed to `path`.\n"
    " The temporary file is placed in the same directory as `path` using the\n"
    " same `.__fio_tmp_*` prefix as `write_atomic`.\n"
).
-spec atomic(
    binary(),
    fun((binary()) -> {ok, EZD} | {error, fio@error:fio_error()})
) -> {ok, EZD} | {error, fio@error:fio_error()}.
atomic(Path, Callback) ->
    Dir = fio@path:directory_name(Path),
    Tmp = fio@path:join(
        Dir,
        <<".__fio_tmp_"/utf8,
            (fio_ffi:unique_name(<<"fio_atomic_"/utf8>>))/binary>>
    ),
    Res = Callback(Tmp),
    case Res of
        {ok, Val} ->
            case rename(Tmp, Path) of
                {ok, _} ->
                    {ok, Val};

                {error, E} ->
                    _ = delete(Tmp),
                    {error, E}
            end;

        {error, E@1} ->
            _ = delete(Tmp),
            {error, E@1}
    end.