#     Copyright 2013, Kay Hayen, mailto:kay.hayen@gmail.com
#
#     Part of "Nuitka", an optimizing Python compiler that is compatible and
#     integrates with CPython, but also works on its own.
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.
#
""" Pack and copy files for standalone mode.

This is in heavy flux now, cannot be expected to work or make sense on all
the platforms.
"""

import os
import subprocess
import sys
from logging import debug, info
import marshal

from nuitka import Utils
from nuitka.codegen.ConstantCodes import needsPickleInit

python_dll_dir_name = "_python"


def getDependsExePath():
    if Utils.getArchitecture() == "x86":
        depends_url = "http://dependencywalker.com/depends22_x86.zip"
    else:
        depends_url = "http://dependencywalker.com/depends22_x64.zip"

    import urllib

    if "APPDATA" not in os.environ:
        sys.exit("Error, standalone mode cannot find 'APPDATA' environment.")

    nuitka_app_dir = os.path.join(os.environ["APPDATA"],"nuitka")
    if not Utils.isDir(nuitka_app_dir):
        os.makedirs(nuitka_app_dir)

    nuitka_depends_zip = os.path.join(
        nuitka_app_dir,
        os.path.basename(depends_url)
    )

    if not Utils.isFile(nuitka_depends_zip):
        print("""\
Nuitka will make use of Dependency Walker (http://dependencywalker.com) tool
to analyse the dependencies of Python extension modules. Is it OK to download
and put it in APPDATA (no installer needed, cached, one time question)."""
        )

        reply = raw_input("Proceed and download? [Yes]/No ")

        if reply.lower() in ("no", "n"):
            sys.exit("Nuitka does not work in --standalone on Windows without.")

        info("Downloading", depends_url)

        urllib.urlretrieve(
            depends_url,
            nuitka_depends_zip
        )

    nuitka_depends_dir = os.path.join(
        nuitka_app_dir,
        Utils.getArchitecture()
    )

    if not Utils.isDir(nuitka_depends_dir):
        os.makedirs(nuitka_depends_dir)

    depends_exe = os.path.join(
        nuitka_depends_dir,
        "depends.exe"
    )

    if not Utils.isFile(depends_exe):
        info("Extracting", depends_exe)

        import zipfile
        depends_zip = zipfile.ZipFile(nuitka_depends_zip)
        depends_zip.extractall(nuitka_depends_dir)

    assert Utils.isFile(depends_exe)

    return depends_exe


def loadCodeObjectData(precompiled_filename):
    # Ignoring magic numbers, etc. which we don't have to care for much as
    # CPython already checked them (would have rejected it otherwise).
    return open(precompiled_filename, "rb").read()[8:]


module_names = set()


def _detectedSourceFile(filename, module_name, module_names, result, is_late):
    source_code = open(filename,"rb").read()

    if Utils.python_version >= 300:
        source_code = source_code.decode("utf-8")
        filename = filename.decode("utf-8")

    if module_name in module_names:
        return

    debug(
        "Freezing module '%s' (from '%s').",
        module_name,
        filename
    )

    result.append(
        (
            module_name,
            marshal.dumps(
                compile(source_code, filename, "exec")
            ),
            Utils.basename(filename) == "__init__.py",
            filename,
            is_late
        )
    )

    module_names.add(module_name)


def _detectedShlibFile(filename, module_name, module_names, result):
    if Utils.python_version >= 300:
        filename = filename.decode("utf-8")

    parts = module_name.split(".")
    if len(parts) == 1:
        package_name = None
        name = module_name
    else:
        package_name = ".".join(parts[:-1])
        name = parts[-1]

    from nuitka.nodes.FutureSpecs import FutureSpec
    from nuitka.nodes.ModuleNodes import PythonShlibModule
    from nuitka import SourceCodeReferences

    source_ref = SourceCodeReferences.fromFilename(
        filename    = filename,
        future_spec = FutureSpec()
    )

    shlib_module = PythonShlibModule(
        package_name = package_name,
        name         = name,
        source_ref   = source_ref
    )

    from nuitka import ModuleRegistry
    ModuleRegistry.addRootModule(shlib_module)

    module_names.add(module_name)

def _detectImports(command, is_late):
    # print(command)

    # Print statements for stuff to show, the modules loaded.
    if Utils.python_version >= 300:
        command += r'import sys; print("\n".join(sorted("import " + module.__name__ + " # sourcefile " + module.__file__ for module in sys.modules.values() if hasattr(module, "__file__") and module.__file__ != "<frozen>")), file = sys.stderr)'  # do not read it, pylint: disable=C0301

    process = subprocess.Popen(
        args   = [sys.executable, "-s", "-S", "-v", "-c", command],
        stdout = subprocess.PIPE,
        stderr = subprocess.PIPE
    )

    _stdout, stderr = process.communicate()

    # Don't let errors here go unnoticed.
    assert process.returncode == 0

    result = []

    debug("Detecting imports:")

    # bug of PyLint, pylint: disable=E1103
    for line in stderr.replace(b"\r", b"").split(b"\n"):
        if line.startswith(b"import "):
            # print(line)

            parts = line.split(b" # ", 2)

            module_name = parts[0].split(b" ", 2)[1]
            origin = parts[1].split()[0]

            if Utils.python_version >= 300:
                module_name = module_name.decode("utf-8")

            if origin == b"precompiled":
                # This is a ".pyc" file that was imported, even before we have a
                # chance to do anything, we need to preserve it.
                filename = parts[1][len(b"precompiled from "):]

                if Utils.python_version >= 300:
                    filename = filename.decode("utf-8")

                if module_name in module_names:
                    continue

                debug(
                    "Freezing module '%s' (from '%s').",
                    module_name,
                    filename
                )

                result.append(
                    (
                        module_name,
                        loadCodeObjectData(
                            precompiled_filename = filename
                        ),
                        "__init__" in filename,
                        filename,
                        is_late
                    ),
                )

                module_names.add(module_name)
            elif origin == b"sourcefile":
                filename = parts[1][len(b"sourcefile "):]

                if filename.endswith(b".py"):
                    _detectedSourceFile(
                        filename     = filename,
                        module_name  = module_name,
                        module_names = module_names,
                        result       = result,
                        is_late      = is_late
                    )
                else:
                    _detectedShlibFile(
                        filename     = filename,
                        module_name  = module_name,
                        module_names = module_names,
                        result       = result
                    )
            elif origin == b"dynamically":
                # Shared library in early load, happens on RPM based systems and
                # or self compiled Python installations.
                filename = parts[1][len(b"dynamically loaded from "):]

                _detectedShlibFile(
                    filename     = filename,
                    module_name  = module_name,
                    module_names = module_names,
                    result       = result
                )

    return result

def detectLateImports():
    command = ""
    # When we are using pickle internally (for some hard constant cases we do),
    # we need to make sure it will be available as well.
    if needsPickleInit():
        command += "import {pickle};".format(
            pickle = "pickle" if Utils.python_version >= 300 else "cPickle"
        )

    # For Python3 we patch inspect without knowing if it is used.
    if Utils.python_version >= 300:
        command += "import inspect;"

    if command:
        result = _detectImports(command, True)

        debug("Finished detecting late imports.")

        return result
    else:
        return ""


def detectEarlyImports():
    # TODO: Should recursively include all of encodings module.
    command = "import encodings.utf_8;import encodings.ascii;"

    if Utils.getOS() == "Windows":
        command += "import encodings.mbcs;"

    # String method hex depends on it.
    if Utils.python_version < 300:
        command += "import encodings.hex_codec;"

    command += "import locale;"

    result = _detectImports(command, False)
    debug("Finished detecting early imports.")

    return result

def detectBinaryDLLs(binary_filename, package_name):
    result = set()

    if Utils.getOS() in ("Linux", "NetBSD"):
        # Ask "ldd" about the libraries being used by the created binary, these
        # are the ones that interest us.
        process = subprocess.Popen(
            args   = [
                "ldd",
                binary_filename
            ],
            stdout = subprocess.PIPE,
            stderr = subprocess.PIPE
        )

        stdout, _stderr = process.communicate()

        for line in stdout.split(b"\n"):
            if not line:
                continue

            if b"=>" not in line:
                continue

            part = line.split(b" => ", 2)[1]

            if b"(" in part:
                filename = part[:part.rfind(b"(")-1]
            else:
                filename = part

            if not filename:
                continue

            if Utils.python_version >= 300:
                filename = filename.decode("utf-8")

            result.add(filename)
    elif Utils.getOS() == "Windows":
        depends_exe = getDependsExePath()

        env = os.environ.copy()
        path = env.get("PATH","").split(";")

        path += sys.path

        if package_name is not None:
            for element in sys.path:
                candidate = Utils.joinpath(element, package_name)

                if Utils.isDir(candidate):
                    path.append(candidate)


        env["PATH"] = ";".join(path)

        subprocess.call(
            (
                depends_exe,
                "-c",
                "-ot%s" % binary_filename + ".depends",
                "-f1",
                "-pa1",
                "-ps1",
                binary_filename
            ),
            env = env,
        )

        inside = False
        for line in open(binary_filename + ".depends"):
            if "| Module Dependency Tree |" in line:
                inside = True
                continue

            if not inside:
                continue

            if "| Module List |" in line:
                break

            if "]" not in line:
                continue

            # Skip missing DLLs, apparently not needed anyway.
            if "?" in line[:line.find("]")]:
                continue

            dll_filename = line[line.find("]")+2:-1]
            assert Utils.isFile(dll_filename), dll_filename

            # The executable itself is of course excempted.
            if Utils.normcase(dll_filename) == \
                Utils.normcase(Utils.abspath(binary_filename)):
                continue

            dll_name = Utils.basename(dll_filename).upper()

            # Win API can be assumed.
            if dll_name.startswith("API-MS-WIN"):
                continue

            if dll_name in ("SHELL32.DLL", "USER32.DLL", "KERNEL32.DLL",
                "NTDLL.DLL", "NETUTILS.DLL", "LOGONCLI.DLL", "GDI32.DLL",
                "RPCRT4.DLL", "ADVAPI32.DLL", "SSPICLI.DLL", "SECUR32.DLL",
                "KERNELBASE.DLL", "WINBRAND.DLL", "DSROLE.DLL", "DNSAPI.DLL",
                "SAMCLI.DLL", "WKSCLI.DLL", "SAMLIB.DLL", "WLDAP32.DLL",
                "NTDSAPI.DLL", "CRYPTBASE.DLL", "W32TOPL", "WS2_32.DLL",
                "SPPC.DLL", "MSSIGN32.DLL", "CERTCLI.DLL", "WEBSERVICES.DLL",
                "AUTHZ.DLL", "CERTENROLL.DLL", "VAULTCLI.DLL", "REGAPI.DLL",
                "BROWCLI.DLL", "WINNSI.DLL", "DHCPCSVC6.DLL", "PCWUM.DLL",
                "CLBCATQ.DLL", "IMAGEHLP.DLL", "MSASN1.DLL", "DBGHELP.DLL",
                "DEVOBJ.DLL", "DRVSTORE.DLL", "CABINET.DLL", "SCECLI.DLL",
                "SPINF.DLL", "SPFILEQ.DLL", "GPAPI.DLL", "NETJOIN.DLL",
                "W32TOPL.DLL", "NETBIOS.DLL", "DXGI.DLL", "DWRITE.DLL",
                "D3D11.DLL", "WLANAPI.DLL", "WLANUTIL.DLL", "ONEX.DLL",
                "EAPPPRXY.DLL", "MFPLAT.DLL", "AVRT.DLL", "ELSCORE.DLL",
                "INETCOMM.DLL", "MSOERT2.DLL", "IEUI.DLL", "MSCTF.DLL",
                "MSFEEDS.DLL", "UIAUTOMATIONCORE.DLL", "PSAPI.DLL",
                "EFSADU.DLL", "MFC42U.DLL", "ODBC32.DLL", "OLEDLG.DLL",
                "NETAPI32.DLL", "LINKINFO.DLL", "DUI70.DLL", "ADVPACK.DLL",
                "NTSHRUI.DLL", "WINSPOOL.DRV", "EFSUTIL.DLL", "WINSCARD.DLL",
                "SHDOCVW.DLL", "IEFRAME.DLL", "D2D1.DLL", "GDIPLUS.DLL",
                "OCCACHE.DLL", "IEADVPACK.DLL", "MLANG.DLL", "MSI.DLL",
                "MSHTML.DLL", "COMDLG32.DLL", "PRINTUI.DLL", "PUIAPI.DLL",
                "ACLUI.DLL", "WTSAPI32.DLL", "FMS.DLL", "DFSCLI.DLL",
                "HLINK.DLL", "MSRATING.DLL", "PRNTVPT.DLL", "IMGUTIL.DLL",
                "MSLS31.DLL", "VERSION.DLL", "NORMALIZ.DLL", "IERTUTIL.DLL",
                "WININET.DLL", "WINTRUST.DLL", "XMLLITE.DLL", "APPHELP.DLL",
                "PROPSYS.DLL", "RSTRTMGR.DLL", "NCRYPT.DLL", "BCRYPT.DLL",
                "MMDEVAPI.DLL", "MSILTCFG.DLL", "DEVMGR.DLL", "DEVRTL.DLL",
                "NEWDEV.DLL", "VPNIKEAPI.DLL", "WINHTTP.DLL", "WEBIO.DLL",
                "NSI.DLL", "DHCPCSVC.DLL", "CRYPTUI.DLL", "ESENT.DLL",
                "DAVHLPR.DLL", "CSCAPI.DLL", "ATL.DLL", "OLEAUT32.DLL",
                "SRVCLI.DLL", "RASDLG.DLL", "MPRAPI.DLL", "RTUTILS.DLL",
                "RASMAN.DLL", "MPRMSG.DLL", "SLC.DLL", "CRYPTSP.DLL",
                "RASAPI32.DLL", "TAPI32.DLL", "EAPPCFG.DLL", "NDFAPI.DLL",
                "WDI.DLL", "COMCTL32.DLL", "UXTHEME.DLL", "IMM32.DLL",
                "OLEACC.DLL", "WINMM.DLL", "WINDOWSCODECS.DLL", "DWMAPI.DLL",
                "DUSER.DLL", "PROFAPI.DLL", "URLMON.DLL", "SHLWAPI.DLL",
                "LPK.DLL", "USP10.DLL", "CFGMGR32.DLL", "MSIMG32.DLL",
                "POWRPROF.DLL", "SETUPAPI.DLL", "WINSTA.DLL", "CRYPT32.DLL",
                "IPHLPAPI.DLL", "MPR.DLL", "CREDUI.DLL", "NETPLWIZ.DLL",
                "OLE32.DLL", "ACTIVEDS.DLL", "ADSLDPC.DLL", "USERENV.DLL"):
                continue

            result.add(dll_filename)

        os.unlink(binary_filename + ".depends")
    else:
        # Support your platform above.
        assert False, Utils.getOS()

    return result


def detectUsedDLLs(standalone_entry_points):
    result = set()

    for binary_filename, package_name in standalone_entry_points:
        result.update(
            detectBinaryDLLs(
                binary_filename = binary_filename,
                package_name    = package_name
            )
        )

    return result
