# postinstall script for pywin32
#
# copies PyWinTypesxx.dll and PythonCOMxx.dll into the system directory,
# and creates a pth file
import os
import sys
import glob
import shutil
import sysconfig

try:
    import winreg as winreg
except:
    import winreg

# Send output somewhere so it can be found if necessary...
import tempfile

tee_f = open(os.path.join(tempfile.gettempdir(), "pywin32_postinstall.log"), "w")


class Tee:
    def __init__(self, file):
        self.f = file

    def write(self, what):
        if self.f is not None:
            try:
                self.f.write(what.replace("\n", "\r\n"))
            except IOError:
                pass
        tee_f.write(what)

    def flush(self):
        if self.f is not None:
            try:
                self.f.flush()
            except IOError:
                pass
        tee_f.flush()


# For some unknown reason, when running under bdist_wininst we will start up
# with sys.stdout as None but stderr is hooked up. This work-around allows
# bdist_wininst to see the output we write and display it at the end of
# the install.
if sys.stdout is None:
    sys.stdout = sys.stderr

sys.stderr = Tee(sys.stderr)
sys.stdout = Tee(sys.stdout)

com_modules = [
    # module_name,                      class_names
    ("win32com.servers.interp", "Interpreter"),
    ("win32com.servers.dictionary", "DictionaryPolicy"),
    ("win32com.axscript.client.pyscript", "PyScript"),
]

# Is this a 'silent' install - ie, avoid all dialogs.
# Different than 'verbose'
silent = 0

# Verbosity of output messages.
verbose = 1

root_key_name = "Software\\Python\\PythonCore\\" + sys.winver

try:
    # When this script is run from inside the bdist_wininst installer,
    # file_created() and directory_created() are additional builtin
    # functions which write lines to Python23\pywin32-install.log. This is
    # a list of actions for the uninstaller, the format is inspired by what
    # the Wise installer also creates.
    file_created
    is_bdist_wininst = True
except NameError:
    is_bdist_wininst = False  # we know what it is not - but not what it is :)

    def file_created(file):
        pass

    def directory_created(directory):
        pass

    def get_root_hkey():
        try:
            winreg.OpenKey(
                winreg.HKEY_LOCAL_MACHINE, root_key_name, 0, winreg.KEY_CREATE_SUB_KEY
            )
            return winreg.HKEY_LOCAL_MACHINE
        except OSError:
            # Either not exist, or no permissions to create subkey means
            # must be HKCU
            return winreg.HKEY_CURRENT_USER


try:
    create_shortcut
except NameError:
    # Create a function with the same signature as create_shortcut provided
    # by bdist_wininst
    def create_shortcut(
        path, description, filename, arguments="", workdir="", iconpath="", iconindex=0
    ):
        import pythoncom
        from win32com.shell import shell

        ilink = pythoncom.CoCreateInstance(
            shell.CLSID_ShellLink,
            None,
            pythoncom.CLSCTX_INPROC_SERVER,
            shell.IID_IShellLink,
        )
        ilink.SetPath(path)
        ilink.SetDescription(description)
        if arguments:
            ilink.SetArguments(arguments)
        if workdir:
            ilink.SetWorkingDirectory(workdir)
        if iconpath or iconindex:
            ilink.SetIconLocation(iconpath, iconindex)
        # now save it.
        ipf = ilink.QueryInterface(pythoncom.IID_IPersistFile)
        ipf.Save(filename, 0)

    # Support the same list of "path names" as bdist_wininst.
    def get_special_folder_path(path_name):
        from win32com.shell import shell, shellcon

        for maybe in """
            CSIDL_COMMON_STARTMENU CSIDL_STARTMENU CSIDL_COMMON_APPDATA
            CSIDL_LOCAL_APPDATA CSIDL_APPDATA CSIDL_COMMON_DESKTOPDIRECTORY
            CSIDL_DESKTOPDIRECTORY CSIDL_COMMON_STARTUP CSIDL_STARTUP
            CSIDL_COMMON_PROGRAMS CSIDL_PROGRAMS CSIDL_PROGRAM_FILES_COMMON
            CSIDL_PROGRAM_FILES CSIDL_FONTS""".split():
            if maybe == path_name:
                csidl = getattr(shellcon, maybe)
                return shell.SHGetSpecialFolderPath(0, csidl, False)
        raise ValueError("%s is an unknown path ID" % (path_name,))


def CopyTo(desc, src, dest):
    import win32api, win32con

    while 1:
        try:
            win32api.CopyFile(src, dest, 0)
            return
        except win32api.error as details:
            if details.winerror == 5:  # access denied - user not admin.
                raise
            if silent:
                # Running silent mode - just re-raise the error.
                raise
            full_desc = (
                "Error %s\n\n"
                "If you have any Python applications running, "
                "please close them now\nand select 'Retry'\n\n%s"
                % (desc, details.strerror)
            )
            rc = win32api.MessageBox(
                0, full_desc, "Installation Error", win32con.MB_ABORTRETRYIGNORE
            )
            if rc == win32con.IDABORT:
                raise
            elif rc == win32con.IDIGNORE:
                return
            # else retry - around we go again.


# We need to import win32api to determine the Windows system directory,
# so we can copy our system files there - but importing win32api will
# load the pywintypes.dll already in the system directory preventing us
# from updating them!
# So, we pull the same trick pywintypes.py does, but it loads from
# our pywintypes_system32 directory.
def LoadSystemModule(lib_dir, modname):
    # See if this is a debug build.
    import importlib.util, importlib.machinery

    suffix = "_d" if "_d.pyd" in importlib.machinery.EXTENSION_SUFFIXES else ""
    filename = "%s%d%d%s.dll" % (
        modname,
        sys.version_info[0],
        sys.version_info[1],
        suffix,
    )
    filename = os.path.join(lib_dir, "pywin32_system32", filename)
    loader = importlib.machinery.ExtensionFileLoader(modname, filename)
    spec = importlib.machinery.ModuleSpec(name=modname, loader=loader, origin=filename)
    mod = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(mod)


def SetPyKeyVal(key_name, value_name, value):
    root_hkey = get_root_hkey()
    root_key = winreg.OpenKey(root_hkey, root_key_name)
    try:
        my_key = winreg.CreateKey(root_key, key_name)
        try:
            winreg.SetValueEx(my_key, value_name, 0, winreg.REG_SZ, value)
            if verbose:
                print("-> %s\\%s[%s]=%r" % (root_key_name, key_name, value_name, value))
        finally:
            my_key.Close()
    finally:
        root_key.Close()


def UnsetPyKeyVal(key_name, value_name, delete_key=False):
    root_hkey = get_root_hkey()
    root_key = winreg.OpenKey(root_hkey, root_key_name)
    try:
        my_key = winreg.OpenKey(root_key, key_name, 0, winreg.KEY_SET_VALUE)
        try:
            winreg.DeleteValue(my_key, value_name)
            if verbose:
                print("-> DELETE %s\\%s[%s]" % (root_key_name, key_name, value_name))
        finally:
            my_key.Close()
        if delete_key:
            winreg.DeleteKey(root_key, key_name)
            if verbose:
                print("-> DELETE %s\\%s" % (root_key_name, key_name))
    except OSError as why:
        winerror = getattr(why, "winerror", why.errno)
        if winerror != 2:  # file not found
            raise
    finally:
        root_key.Close()


def RegisterCOMObjects(register=True):
    import win32com.server.register

    if register:
        func = win32com.server.register.RegisterClasses
    else:
        func = win32com.server.register.UnregisterClasses
    flags = {}
    if not verbose:
        flags["quiet"] = 1
    for module, klass_name in com_modules:
        __import__(module)
        mod = sys.modules[module]
        flags["finalize_register"] = getattr(mod, "DllRegisterServer", None)
        flags["finalize_unregister"] = getattr(mod, "DllUnregisterServer", None)
        klass = getattr(mod, klass_name)
        func(klass, **flags)


def RegisterHelpFile(register=True, lib_dir=None):
    if lib_dir is None:
        lib_dir = sysconfig.get_paths()["platlib"]
    if register:
        # Register the .chm help file.
        chm_file = os.path.join(lib_dir, "PyWin32.chm")
        if os.path.isfile(chm_file):
            # This isn't recursive, so if 'Help' doesn't exist, we croak
            SetPyKeyVal("Help", None, None)
            SetPyKeyVal("Help\\Pythonwin Reference", None, chm_file)
            return chm_file
        else:
            print("NOTE: PyWin32.chm can not be located, so has not " "been registered")
    else:
        UnsetPyKeyVal("Help\\Pythonwin Reference", None, delete_key=True)
    return None


def RegisterPythonwin(register=True, lib_dir=None):
    """Add (or remove) Pythonwin to context menu for python scripts.
    ??? Should probably also add Edit command for pys files also.
    Also need to remove these keys on uninstall, but there's no function
        like file_created to add registry entries to uninstall log ???
    """
    import os

    if lib_dir is None:
        lib_dir = sysconfig.get_paths()["platlib"]
    classes_root = get_root_hkey()
    ## Installer executable doesn't seem to pass anything to postinstall script indicating if it's a debug build,
    pythonwin_exe = os.path.join(lib_dir, "Pythonwin", "Pythonwin.exe")
    pythonwin_edit_command = pythonwin_exe + ' -edit "%1"'

    keys_vals = [
        (
            "Software\\Microsoft\\Windows\\CurrentVersion\\App Paths\\Pythonwin.exe",
            "",
            pythonwin_exe,
        ),
        (
            "Software\\Classes\\Python.File\\shell\\Edit with Pythonwin",
            "command",
            pythonwin_edit_command,
        ),
        (
            "Software\\Classes\\Python.NoConFile\\shell\\Edit with Pythonwin",
            "command",
            pythonwin_edit_command,
        ),
    ]

    try:
        if register:
            for key, sub_key, val in keys_vals:
                ## Since winreg only uses the character Api functions, this can fail if Python
                ##  is installed to a path containing non-ascii characters
                hkey = winreg.CreateKey(classes_root, key)
                if sub_key:
                    hkey = winreg.CreateKey(hkey, sub_key)
                winreg.SetValueEx(hkey, None, 0, winreg.REG_SZ, val)
                hkey.Close()
        else:
            for key, sub_key, val in keys_vals:
                try:
                    if sub_key:
                        hkey = winreg.OpenKey(classes_root, key)
                        winreg.DeleteKey(hkey, sub_key)
                        hkey.Close()
                    winreg.DeleteKey(classes_root, key)
                except OSError as why:
                    winerror = getattr(why, "winerror", why.errno)
                    if winerror != 2:  # file not found
                        raise
    finally:
        # tell windows about the change
        from win32com.shell import shell, shellcon

        shell.SHChangeNotify(
            shellcon.SHCNE_ASSOCCHANGED, shellcon.SHCNF_IDLIST, None, None
        )


def get_shortcuts_folder():
    if get_root_hkey() == winreg.HKEY_LOCAL_MACHINE:
        try:
            fldr = get_special_folder_path("CSIDL_COMMON_PROGRAMS")
        except OSError:
            # No CSIDL_COMMON_PROGRAMS on this platform
            fldr = get_special_folder_path("CSIDL_PROGRAMS")
    else:
        # non-admin install - always goes in this user's start menu.
        fldr = get_special_folder_path("CSIDL_PROGRAMS")

    try:
        install_group = winreg.QueryValue(
            get_root_hkey(), root_key_name + "\\InstallPath\\InstallGroup"
        )
    except OSError:
        vi = sys.version_info
        install_group = "Python %d.%d" % (vi[0], vi[1])
    return os.path.join(fldr, install_group)


# Get the system directory, which may be the Wow64 directory if we are a 32bit
# python on a 64bit OS.
def get_system_dir():
    import win32api  # we assume this exists.

    try:
        import pythoncom
        import win32process
        from win32com.shell import shell, shellcon

        try:
            if win32process.IsWow64Process():
                return shell.SHGetSpecialFolderPath(0, shellcon.CSIDL_SYSTEMX86)
            return shell.SHGetSpecialFolderPath(0, shellcon.CSIDL_SYSTEM)
        except (pythoncom.com_error, win32process.error):
            return win32api.GetSystemDirectory()
    except ImportError:
        return win32api.GetSystemDirectory()


def fixup_dbi():
    # We used to have a dbi.pyd with our .pyd files, but now have a .py file.
    # If the user didn't uninstall, they will find the .pyd which will cause
    # problems - so handle that.
    import win32api, win32con

    pyd_name = os.path.join(os.path.dirname(win32api.__file__), "dbi.pyd")
    pyd_d_name = os.path.join(os.path.dirname(win32api.__file__), "dbi_d.pyd")
    py_name = os.path.join(os.path.dirname(win32con.__file__), "dbi.py")
    for this_pyd in (pyd_name, pyd_d_name):
        this_dest = this_pyd + ".old"
        if os.path.isfile(this_pyd) and os.path.isfile(py_name):
            try:
                if os.path.isfile(this_dest):
                    print(
                        "Old dbi '%s' already exists - deleting '%s'"
                        % (this_dest, this_pyd)
                    )
                    os.remove(this_pyd)
                else:
                    os.rename(this_pyd, this_dest)
                    print("renamed '%s'->'%s.old'" % (this_pyd, this_pyd))
                    file_created(this_pyd + ".old")
            except os.error as exc:
                print("FAILED to rename '%s': %s" % (this_pyd, exc))


def install(lib_dir):
    import traceback

    # The .pth file is now installed as a regular file.
    # Create the .pth file in the site-packages dir, and use only relative paths
    # We used to write a .pth directly to sys.prefix - clobber it.
    if os.path.isfile(os.path.join(sys.prefix, "pywin32.pth")):
        os.unlink(os.path.join(sys.prefix, "pywin32.pth"))
    # The .pth may be new and therefore not loaded in this session.
    # Setup the paths just in case.
    for name in "win32 win32\\lib Pythonwin".split():
        sys.path.append(os.path.join(lib_dir, name))
    # It is possible people with old versions installed with still have
    # pywintypes and pythoncom registered.  We no longer need this, and stale
    # entries hurt us.
    for name in "pythoncom pywintypes".split():
        keyname = "Software\\Python\\PythonCore\\" + sys.winver + "\\Modules\\" + name
        for root in winreg.HKEY_LOCAL_MACHINE, winreg.HKEY_CURRENT_USER:
            try:
                winreg.DeleteKey(root, keyname + "\\Debug")
            except WindowsError:
                pass
            try:
                winreg.DeleteKey(root, keyname)
            except WindowsError:
                pass
    LoadSystemModule(lib_dir, "pywintypes")
    LoadSystemModule(lib_dir, "pythoncom")
    import win32api

    # and now we can get the system directory:
    files = glob.glob(os.path.join(lib_dir, "pywin32_system32\\*.*"))
    if not files:
        raise RuntimeError("No system files to copy!!")
    # Try the system32 directory first - if that fails due to "access denied",
    # it implies a non-admin user, and we use sys.prefix
    for dest_dir in [get_system_dir(), sys.prefix]:
        # and copy some files over there
        worked = 0
        try:
            for fname in files:
                base = os.path.basename(fname)
                dst = os.path.join(dest_dir, base)
                CopyTo("installing %s" % base, fname, dst)
                if verbose:
                    print("Copied %s to %s" % (base, dst))
                # Register the files with the uninstaller
                file_created(dst)
                worked = 1
                # Nuke any other versions that may exist - having
                # duplicates causes major headaches.
                bad_dest_dirs = [
                    os.path.join(sys.prefix, "Library\\bin"),
                    os.path.join(sys.prefix, "Lib\\site-packages\\win32"),
                ]
                if dest_dir != sys.prefix:
                    bad_dest_dirs.append(sys.prefix)
                for bad_dest_dir in bad_dest_dirs:
                    bad_fname = os.path.join(bad_dest_dir, base)
                    if os.path.exists(bad_fname):
                        # let exceptions go here - delete must succeed
                        os.unlink(bad_fname)
            if worked:
                break
        except win32api.error as details:
            if details.winerror == 5:
                # access denied - user not admin - try sys.prefix dir,
                # but first check that a version doesn't already exist
                # in that place - otherwise that one will still get used!
                if os.path.exists(dst):
                    msg = (
                        "The file '%s' exists, but can not be replaced "
                        "due to insufficient permissions.  You must "
                        "reinstall this software as an Administrator" % dst
                    )
                    print(msg)
                    raise RuntimeError(msg)
                continue
            raise
    else:
        raise RuntimeError(
            "You don't have enough permissions to install the system files"
        )

    # Pythonwin 'compiles' config files - record them for uninstall.
    pywin_dir = os.path.join(lib_dir, "Pythonwin", "pywin")
    for fname in glob.glob(os.path.join(pywin_dir, "*.cfg")):
        file_created(fname[:-1] + "c")  # .cfg->.cfc

    # Register our demo COM objects.
    try:
        try:
            RegisterCOMObjects()
        except win32api.error as details:
            if details.winerror != 5:  # ERROR_ACCESS_DENIED
                raise
            print("You do not have the permissions to install COM objects.")
            print("The sample COM objects were not registered.")
    except Exception:
        print("FAILED to register the Python COM objects")
        traceback.print_exc()

    # There may be no main Python key in HKCU if, eg, an admin installed
    # python itself.
    winreg.CreateKey(get_root_hkey(), root_key_name)

    chm_file = None
    try:
        chm_file = RegisterHelpFile(True, lib_dir)
    except Exception:
        print("Failed to register help file")
        traceback.print_exc()
    else:
        if verbose:
            print("Registered help file")

    # misc other fixups.
    fixup_dbi()

    # Register Pythonwin in context menu
    try:
        RegisterPythonwin(True, lib_dir)
    except Exception:
        print("Failed to register pythonwin as editor")
        traceback.print_exc()
    else:
        if verbose:
            print("Pythonwin has been registered in context menu")

    # Create the win32com\gen_py directory.
    make_dir = os.path.join(lib_dir, "win32com", "gen_py")
    if not os.path.isdir(make_dir):
        if verbose:
            print("Creating directory %s" % (make_dir,))
        directory_created(make_dir)
        os.mkdir(make_dir)

    try:
        # create shortcuts
        # CSIDL_COMMON_PROGRAMS only available works on NT/2000/XP, and
        # will fail there if the user has no admin rights.
        fldr = get_shortcuts_folder()
        # If the group doesn't exist, then we don't make shortcuts - its
        # possible that this isn't a "normal" install.
        if os.path.isdir(fldr):
            dst = os.path.join(fldr, "PythonWin.lnk")
            create_shortcut(
                os.path.join(lib_dir, "Pythonwin\\Pythonwin.exe"),
                "The Pythonwin IDE",
                dst,
                "",
                sys.prefix,
            )
            file_created(dst)
            if verbose:
                print("Shortcut for Pythonwin created")
            # And the docs.
            if chm_file:
                dst = os.path.join(fldr, "Python for Windows Documentation.lnk")
                doc = "Documentation for the PyWin32 extensions"
                create_shortcut(chm_file, doc, dst)
                file_created(dst)
                if verbose:
                    print("Shortcut to documentation created")
        else:
            if verbose:
                print("Can't install shortcuts - %r is not a folder" % (fldr,))
    except Exception as details:
        print(details)

    # importing win32com.client ensures the gen_py dir created - not strictly
    # necessary to do now, but this makes the installation "complete"
    try:
        import win32com.client  # noqa
    except ImportError:
        # Don't let this error sound fatal
        pass
    print("The pywin32 extensions were successfully installed.")


def uninstall(lib_dir):
    # First ensure our system modules are loaded from pywin32_system, so
    # we can remove the ones we copied...
    LoadSystemModule(lib_dir, "pywintypes")
    LoadSystemModule(lib_dir, "pythoncom")

    try:
        RegisterCOMObjects(False)
    except Exception as why:
        print("Failed to unregister COM objects: %s" % (why,))

    try:
        RegisterHelpFile(False, lib_dir)
    except Exception as why:
        print("Failed to unregister help file: %s" % (why,))
    else:
        if verbose:
            print("Unregistered help file")

    try:
        RegisterPythonwin(False, lib_dir)
    except Exception as why:
        print("Failed to unregister Pythonwin: %s" % (why,))
    else:
        if verbose:
            print("Unregistered Pythonwin")

    try:
        # remove gen_py directory.
        gen_dir = os.path.join(lib_dir, "win32com", "gen_py")
        if os.path.isdir(gen_dir):
            shutil.rmtree(gen_dir)
            if verbose:
                print("Removed directory %s" % (gen_dir,))

        # Remove pythonwin compiled "config" files.
        pywin_dir = os.path.join(lib_dir, "Pythonwin", "pywin")
        for fname in glob.glob(os.path.join(pywin_dir, "*.cfc")):
            os.remove(fname)

        # The dbi.pyd.old files we may have created.
        try:
            os.remove(os.path.join(lib_dir, "win32", "dbi.pyd.old"))
        except os.error:
            pass
        try:
            os.remove(os.path.join(lib_dir, "win32", "dbi_d.pyd.old"))
        except os.error:
            pass

    except Exception as why:
        print("Failed to remove misc files: %s" % (why,))

    try:
        fldr = get_shortcuts_folder()
        for link in ("PythonWin.lnk", "Python for Windows Documentation.lnk"):
            fqlink = os.path.join(fldr, link)
            if os.path.isfile(fqlink):
                os.remove(fqlink)
                if verbose:
                    print("Removed %s" % (link,))
    except Exception as why:
        print("Failed to remove shortcuts: %s" % (why,))
    # Now remove the system32 files.
    files = glob.glob(os.path.join(lib_dir, "pywin32_system32\\*.*"))
    # Try the system32 directory first - if that fails due to "access denied",
    # it implies a non-admin user, and we use sys.prefix
    try:
        for dest_dir in [get_system_dir(), sys.prefix]:
            # and copy some files over there
            worked = 0
            for fname in files:
                base = os.path.basename(fname)
                dst = os.path.join(dest_dir, base)
                if os.path.isfile(dst):
                    try:
                        os.remove(dst)
                        worked = 1
                        if verbose:
                            print("Removed file %s" % (dst))
                    except Exception:
                        print("FAILED to remove %s" % (dst,))
            if worked:
                break
    except Exception as why:
        print("FAILED to remove system files: %s" % (why,))


# NOTE: If this script is run from inside the bdist_wininst created
# binary installer or uninstaller, the command line args are either
# '-install' or '-remove'.

# Important: From inside the binary installer this script MUST NOT
# call sys.exit() or raise SystemExit, otherwise not only this script
# but also the installer will terminate! (Is there a way to prevent
# this from the bdist_wininst C code?)


def verify_destination(location):
    if not os.path.isdir(location):
        raise argparse.ArgumentTypeError('Path "{}" does not exist!'.format(location))
    return location


def main():
    import argparse

    parser = argparse.ArgumentParser(
        formatter_class=argparse.RawDescriptionHelpFormatter,
        description="""A post-install script for the pywin32 extensions.

    * Typical usage:

    > python pywin32_postinstall.py -install

    If you installed pywin32 via a .exe installer, this should be run
    automatically after installation, but if it fails you can run it again.

    If you installed pywin32 via PIP, you almost certainly need to run this to
    setup the environment correctly.

    Execute with script with a '-install' parameter, to ensure the environment
    is setup correctly.
    """,
    )
    parser.add_argument(
        "-install",
        default=False,
        action="store_true",
        help="Configure the Python environment correctly for pywin32.",
    )
    parser.add_argument(
        "-remove",
        default=False,
        action="store_true",
        help="Try and remove everything that was installed or copied.",
    )
    parser.add_argument(
        "-wait",
        type=int,
        help="Wait for the specified process to terminate before starting.",
    )
    parser.add_argument(
        "-silent",
        default=False,
        action="store_true",
        help='Don\'t display the "Abort/Retry/Ignore" dialog for files in use.',
    )
    parser.add_argument(
        "-quiet",
        default=False,
        action="store_true",
        help="Don't display progress messages.",
    )
    parser.add_argument(
        "-destination",
        default=sysconfig.get_paths()["platlib"],
        type=verify_destination,
        help="Location of the PyWin32 installation",
    )

    args = parser.parse_args()

    if not args.quiet:
        print("Parsed arguments are: {}".format(args))

    if not args.install ^ args.remove:
        parser.error("You need to either choose to -install or -remove!")

    if args.wait is not None:
        try:
            os.waitpid(args.wait, 0)
        except os.error:
            # child already dead
            pass

    silent = args.silent
    verbose = not args.quiet

    if args.install:
        install(args.destination)

    if args.remove:
        if not is_bdist_wininst:
            uninstall(args.destination)


if __name__ == "__main__":
    main()
