import ctypes.wintypes

CreateSymbolicLink = ctypes.windll.kernel32.CreateSymbolicLinkW
CreateSymbolicLink.argtypes = (
	ctypes.wintypes.LPWSTR,
	ctypes.wintypes.LPWSTR,
	ctypes.wintypes.DWORD,
	)
CreateSymbolicLink.restype = ctypes.wintypes.BOOLEAN

CreateHardLink = ctypes.windll.kernel32.CreateHardLinkW
CreateHardLink.argtypes = (
	ctypes.wintypes.LPWSTR,
	ctypes.wintypes.LPWSTR,
	ctypes.wintypes.LPVOID, # reserved for LPSECURITY_ATTRIBUTES
	)
CreateHardLink.restype = ctypes.wintypes.BOOLEAN

GetFileAttributes = ctypes.windll.kernel32.GetFileAttributesW
GetFileAttributes.argtypes = ctypes.wintypes.LPWSTR,
GetFileAttributes.restype = ctypes.wintypes.DWORD

SetFileAttributes = ctypes.windll.kernel32.SetFileAttributesW
SetFileAttributes.argtypes = ctypes.wintypes.LPWSTR, ctypes.wintypes.DWORD
SetFileAttributes.restype = ctypes.wintypes.BOOL

MAX_PATH = 260

GetFinalPathNameByHandle = ctypes.windll.kernel32.GetFinalPathNameByHandleW
GetFinalPathNameByHandle.argtypes = (
	ctypes.wintypes.HANDLE, ctypes.wintypes.LPWSTR, ctypes.wintypes.DWORD, ctypes.wintypes.DWORD,
	)
GetFinalPathNameByHandle.restype = ctypes.wintypes.DWORD

class SECURITY_ATTRIBUTES(ctypes.Structure):
	_fields_ = (
		('length', ctypes.wintypes.DWORD),
		('p_security_descriptor', ctypes.wintypes.LPVOID),
		('inherit_handle', ctypes.wintypes.BOOLEAN),
		)
LPSECURITY_ATTRIBUTES = ctypes.POINTER(SECURITY_ATTRIBUTES)

CreateFile = ctypes.windll.kernel32.CreateFileW
CreateFile.argtypes = (
	ctypes.wintypes.LPWSTR,
	ctypes.wintypes.DWORD,
	ctypes.wintypes.DWORD,
	LPSECURITY_ATTRIBUTES,
	ctypes.wintypes.DWORD,
	ctypes.wintypes.DWORD,
	ctypes.wintypes.HANDLE,
	)
CreateFile.restype = ctypes.wintypes.HANDLE
FILE_SHARE_READ = 1
FILE_SHARE_WRITE = 2
FILE_SHARE_DELETE = 4
FILE_FLAG_OPEN_REPARSE_POINT = 0x00200000
FILE_FLAG_BACKUP_SEMANTICS = 0x2000000
NULL = 0
OPEN_EXISTING = 3
FILE_ATTRIBUTE_READONLY = 0x1
FILE_ATTRIBUTE_HIDDEN = 0x2
FILE_ATTRIBUTE_DIRECTORY = 0x10
FILE_ATTRIBUTE_NORMAL = 0x80
FILE_ATTRIBUTE_REPARSE_POINT = 0x400
GENERIC_READ = 0x80000000
FILE_READ_ATTRIBUTES = 0x80
INVALID_HANDLE_VALUE = ctypes.wintypes.HANDLE(-1).value

INVALID_FILE_ATTRIBUTES = 0xFFFFFFFF

ERROR_NO_MORE_FILES = 0x12

VOLUME_NAME_DOS = 0

CloseHandle = ctypes.windll.kernel32.CloseHandle
CloseHandle.argtypes = (ctypes.wintypes.HANDLE,)
CloseHandle.restype = ctypes.wintypes.BOOLEAN

class WIN32_FIND_DATA(ctypes.Structure):
	_fields_ = [
		('file_attributes', ctypes.wintypes.DWORD),
		('creation_time', ctypes.wintypes.FILETIME),
		('last_access_time', ctypes.wintypes.FILETIME),
		('last_write_time', ctypes.wintypes.FILETIME),
		('file_size_words', ctypes.wintypes.DWORD*2),
		('reserved', ctypes.wintypes.DWORD*2),
		('filename', ctypes.wintypes.WCHAR*MAX_PATH),
		('alternate_filename', ctypes.wintypes.WCHAR*14),
	]

	@property
	def file_size(self):
		return ctypes.cast(self.file_size_words, ctypes.POINTER(ctypes.c_uint64)).contents

LPWIN32_FIND_DATA = ctypes.POINTER(WIN32_FIND_DATA)

FindFirstFile = ctypes.windll.kernel32.FindFirstFileW
FindFirstFile.argtypes = (ctypes.wintypes.LPWSTR, LPWIN32_FIND_DATA)
FindFirstFile.restype = ctypes.wintypes.HANDLE
FindNextFile = ctypes.windll.kernel32.FindNextFileW
FindNextFile.argtypes = (ctypes.wintypes.HANDLE, LPWIN32_FIND_DATA)
FindNextFile.restype = ctypes.wintypes.BOOLEAN

SCS_32BIT_BINARY = 0 # A 32-bit Windows-based application
SCS_64BIT_BINARY = 6 # A 64-bit Windows-based application
SCS_DOS_BINARY = 1 # An MS-DOS-based application
SCS_OS216_BINARY = 5 # A 16-bit OS/2-based application
SCS_PIF_BINARY = 3 # A PIF file that executes an MS-DOS-based application
SCS_POSIX_BINARY = 4 # A POSIX-based application
SCS_WOW_BINARY = 2 # A 16-bit Windows-based application

_GetBinaryType = ctypes.windll.kernel32.GetBinaryTypeW
_GetBinaryType.argtypes = (ctypes.wintypes.LPWSTR, ctypes.POINTER(ctypes.wintypes.DWORD))
_GetBinaryType.restype = ctypes.wintypes.BOOL

FILEOP_FLAGS = ctypes.wintypes.WORD
class SHFILEOPSTRUCT(ctypes.Structure):
	_fields_ = [
		('status_dialog', ctypes.wintypes.HWND),
		('operation', ctypes.wintypes.UINT),
		('from_', ctypes.wintypes.LPWSTR),
		('to', ctypes.wintypes.LPWSTR),
		('flags', FILEOP_FLAGS),
		('operations_aborted', ctypes.wintypes.BOOL),
		('name_mapping_handles', ctypes.wintypes.LPVOID),
		('progress_title', ctypes.wintypes.LPWSTR),
	]
_SHFileOperation = ctypes.windll.shell32.SHFileOperationW
_SHFileOperation.argtypes = [ctypes.POINTER(SHFILEOPSTRUCT)]
_SHFileOperation.restype = ctypes.c_int

FOF_ALLOWUNDO = 64
FOF_NOCONFIRMATION = 16
FO_DELETE = 3

ReplaceFile = ctypes.windll.kernel32.ReplaceFileW
ReplaceFile.restype = ctypes.wintypes.BOOL
ReplaceFile.argtypes = [
	ctypes.wintypes.LPWSTR,
	ctypes.wintypes.LPWSTR,
	ctypes.wintypes.LPWSTR,
	ctypes.wintypes.DWORD,
	ctypes.wintypes.LPVOID,
	ctypes.wintypes.LPVOID,
	]

REPLACEFILE_WRITE_THROUGH = 0x1
REPLACEFILE_IGNORE_MERGE_ERRORS = 0x2
REPLACEFILE_IGNORE_ACL_ERRORS = 0x4

class STAT_STRUCT(ctypes.Structure):
	_fields_ = [
		('dev', ctypes.c_uint),
		('ino', ctypes.c_ushort),
		('mode', ctypes.c_ushort),
		('nlink', ctypes.c_short),
		('uid', ctypes.c_short),
		('gid', ctypes.c_short),
		('rdev', ctypes.c_uint),
		# the following 4 fields are ctypes.c_uint64 for _stat64
		('size', ctypes.c_uint),
		('atime', ctypes.c_uint),
		('mtime', ctypes.c_uint),
		('ctime', ctypes.c_uint),
	]

_wstat = ctypes.windll.msvcrt._wstat
_wstat.argtypes = [ctypes.wintypes.LPWSTR, ctypes.POINTER(STAT_STRUCT)]
_wstat.restype = ctypes.c_int

FILE_NOTIFY_CHANGE_LAST_WRITE = 0x10

FindFirstChangeNotification = ctypes.windll.kernel32.FindFirstChangeNotificationW
FindFirstChangeNotification.argtypes = ctypes.wintypes.LPWSTR, ctypes.wintypes.BOOL, ctypes.wintypes.DWORD
FindFirstChangeNotification.restype = ctypes.wintypes.HANDLE

FindCloseChangeNotification = ctypes.windll.kernel32.FindCloseChangeNotification
FindCloseChangeNotification.argtypes = ctypes.wintypes.HANDLE,
FindCloseChangeNotification.restype = ctypes.wintypes.BOOL

FindNextChangeNotification = ctypes.windll.kernel32.FindNextChangeNotification
FindNextChangeNotification.argtypes = ctypes.wintypes.HANDLE,
FindNextChangeNotification.restype = ctypes.wintypes.BOOL

FILE_FLAG_OPEN_REPARSE_POINT = 0x00200000
IO_REPARSE_TAG_SYMLINK = 0xA000000C
FSCTL_GET_REPARSE_POINT = 0x900a8

LPDWORD = ctypes.POINTER(ctypes.wintypes.DWORD)
LPOVERLAPPED = ctypes.wintypes.LPVOID

DeviceIoControl = ctypes.windll.kernel32.DeviceIoControl
DeviceIoControl.argtypes = [
	ctypes.wintypes.HANDLE,
	ctypes.wintypes.DWORD,
	ctypes.wintypes.LPVOID,
	ctypes.wintypes.DWORD,
	ctypes.wintypes.LPVOID,
	ctypes.wintypes.DWORD,
	LPDWORD,
	LPOVERLAPPED,
	]
DeviceIoControl.restype = ctypes.wintypes.BOOL

class REPARSE_DATA_BUFFER(ctypes.Structure):
	_fields_ = [
		('tag', ctypes.c_ulong),
		('data_length', ctypes.c_ushort),
		('reserved', ctypes.c_ushort),
		('substitute_name_offset', ctypes.c_ushort),
		('substitute_name_length', ctypes.c_ushort),
		('print_name_offset', ctypes.c_ushort),
		('print_name_length', ctypes.c_ushort),
		('flags', ctypes.c_ulong),
		('path_buffer', ctypes.c_byte*1),
	]
	def get_print_name(self):
		wchar_size = ctypes.sizeof(ctypes.wintypes.WCHAR)
		arr_typ = ctypes.wintypes.WCHAR*(self.print_name_length//wchar_size)
		data = ctypes.byref(self.path_buffer, self.print_name_offset)
		return ctypes.cast(data, ctypes.POINTER(arr_typ)).contents.value

	def get_substitute_name(self):
		wchar_size = ctypes.sizeof(ctypes.wintypes.WCHAR)
		arr_typ = ctypes.wintypes.WCHAR*(self.substitute_name_length//wchar_size)
		data = ctypes.byref(self.path_buffer, self.substitute_name_offset)
		return ctypes.cast(data, ctypes.POINTER(arr_typ)).contents.value
