# MIT License
#
# Copyright The SCons Foundation
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"""
Helper functions for Microsoft Visual C/C++.
"""

import os
import re

from collections import (
    namedtuple,
)

from . import Config

# path utilities

def listdir_dirs(p):
    """
    Return a list of tuples for each subdirectory of the given directory path.
    Each tuple is comprised of the subdirectory name and the qualified subdirectory path.

    Args:
        p: str
            directory path

    Returns:
        list[tuple[str,str]]: a list of tuples

    """
    dirs = []
    if p and os.path.exists(p) and os.path.isdir(p):
        for dir_name in os.listdir(p):
            dir_path = os.path.join(p, dir_name)
            if os.path.isdir(dir_path):
                dirs.append((dir_name, dir_path))
    return dirs

def process_path(p):
    """
    Normalize a system path

    Args:
        p: str
            system path

    Returns:
        str: normalized system path

    """
    if p:
        p = os.path.normpath(p)
        p = os.path.realpath(p)
        p = os.path.normcase(p)
    return p

# msvc version and msvc toolset version regexes

re_version_prefix = re.compile('^(?P<version>[0-9]+(?:[.][0-9]+)*)(?![.]).*$')

re_msvc_version_prefix = re.compile(r'^(?P<version>[1-9][0-9]?[.][0-9]).*$')

re_msvc_version = re.compile(r'^(?P<msvc_version>[1-9][0-9]?[.][0-9])(?P<suffix>[A-Z]+)*$', re.IGNORECASE)

re_extended_version = re.compile(r'''^
    (?P<version>(?:
        ([1-9][0-9]?[.][0-9]{1,2})|                     # XX.Y       - XX.YY
        ([1-9][0-9][.][0-9]{2}[.][0-9]{1,5})|           # XX.YY.Z    - XX.YY.ZZZZZ
        ([1-9][0-9][.][0-9]{2}[.][0-9]{2}[.][0-9]{1,2}) # XX.YY.AA.B - XX.YY.AA.BB
    ))
    (?P<suffix>[A-Z]+)*
$''', re.IGNORECASE | re.VERBOSE)

re_toolset_full = re.compile(r'''^(?:
    (?:[1-9][0-9][.][0-9]{1,2})|           # XX.Y    - XX.YY
    (?:[1-9][0-9][.][0-9]{2}[.][0-9]{1,5}) # XX.YY.Z - XX.YY.ZZZZZ
)$''', re.VERBOSE)

re_toolset_140 = re.compile(r'''^(?:
    (?:14[.]0{1,2})|       # 14.0    - 14.00
    (?:14[.]0{2}[.]0{1,5}) # 14.00.0 - 14.00.00000
)$''', re.VERBOSE)

re_toolset_sxs = re.compile(
    r'^[1-9][0-9][.][0-9]{2}[.][0-9]{2}[.][0-9]{1,2}$' # MM.mm.VV.vv format
)

# msvc sdk version regexes

re_msvc_sdk_version = re.compile(r'''^
    (?P<version>(?:
        ([1-9][0-9]?[.][0-9])|                           # XX.Y
        ([1-9][0-9][.][0-9]{1}[.][0-9]{5}[.][0-9]{1,2})  # XX.Y.ZZZZZ.A - XX.Y.ZZZZZ.AA
    ))
$''', re.IGNORECASE | re.VERBOSE)

# version prefix utilities

def get_version_prefix(version):
    """
    Get the version number prefix from a string.

    Args:
        version: str
            version specification

    Returns:
        str: the version number prefix

    """
    rval = ''
    if version:
        m = re_version_prefix.match(version)
        if m:
            rval = m.group('version')
    return rval

def get_msvc_version_prefix(version):
    """
    Get the msvc version number prefix from a string.

    Args:
        version: str
            version specification

    Returns:
        str: the msvc version number prefix

    """
    rval = ''
    if version:
        m = re_msvc_version_prefix.match(version)
        if m:
            rval = m.group('version')
    return rval

# toolset version query utilities

def is_toolset_full(toolset_version):
    rval = False
    if toolset_version:
        if re_toolset_full.match(toolset_version):
            rval = True
    return rval

def is_toolset_140(toolset_version):
    rval = False
    if toolset_version:
        if re_toolset_140.match(toolset_version):
            rval = True
    return rval

def is_toolset_sxs(toolset_version):
    rval = False
    if toolset_version:
        if re_toolset_sxs.match(toolset_version):
            rval = True
    return rval

# msvc version and msvc toolset version decomposition utilties

_MSVC_VERSION_COMPONENTS_DEFINITION = namedtuple('MSVCVersionComponentsDefinition', [
    'msvc_version', # msvc version (e.g., '14.1Exp')
    'msvc_verstr',  # msvc version numeric string (e.g., '14.1')
    'msvc_suffix',  # msvc version component type (e.g., 'Exp')
    'msvc_vernum',  # msvc version floating point number (e.g, 14.1)
    'msvc_major',   # msvc major version integer number (e.g., 14)
    'msvc_minor',   # msvc minor version integer number (e.g., 1)
    'msvc_comps',   # msvc version components tuple (e.g., ('14', '1'))
])

def msvc_version_components(vcver):
    """
    Decompose an msvc version into components.

    Tuple fields:
        msvc_version: msvc version (e.g., '14.1Exp')
        msvc_verstr:  msvc version numeric string (e.g., '14.1')
        msvc_suffix:  msvc version component type (e.g., 'Exp')
        msvc_vernum:  msvc version floating point number (e.g., 14.1)
        msvc_major:   msvc major version integer number (e.g., 14)
        msvc_minor:   msvc minor version integer number (e.g., 1)
        msvc_comps:   msvc version components tuple (e.g., ('14', '1'))

    Args:
        vcver: str
            msvc version specification

    Returns:
        None or MSVCVersionComponents namedtuple:
    """

    if not vcver:
        return None

    m = re_msvc_version.match(vcver)
    if not m:
        return None

    vs_def = Config.MSVC_VERSION_SUFFIX.get(vcver)
    if not vs_def:
        return None

    msvc_version = vcver
    msvc_verstr = m.group('msvc_version')
    msvc_suffix = m.group('suffix') if m.group('suffix') else ''
    msvc_vernum = float(msvc_verstr)

    msvc_comps = tuple(msvc_verstr.split('.'))
    msvc_major, msvc_minor = [int(x) for x in msvc_comps]

    msvc_version_components_def = _MSVC_VERSION_COMPONENTS_DEFINITION(
        msvc_version = msvc_version,
        msvc_verstr = msvc_verstr,
        msvc_suffix = msvc_suffix,
        msvc_vernum = msvc_vernum,
        msvc_major = msvc_major,
        msvc_minor = msvc_minor,
        msvc_comps = msvc_comps,
    )

    return msvc_version_components_def

_MSVC_EXTENDED_VERSION_COMPONENTS_DEFINITION = namedtuple('MSVCExtendedVersionComponentsDefinition', [
    'msvc_version', # msvc version (e.g., '14.1Exp')
    'msvc_verstr',  # msvc version numeric string (e.g., '14.1')
    'msvc_suffix',  # msvc version component type (e.g., 'Exp')
    'msvc_vernum',  # msvc version floating point number (e.g, 14.1)
    'msvc_major',   # msvc major version integer number (e.g., 14)
    'msvc_minor',   # msvc minor version integer number (e.g., 1)
    'msvc_comps',   # msvc version components tuple (e.g., ('14', '1'))
    'msvc_toolset_version',  # msvc toolset version
    'msvc_toolset_comps',    # msvc toolset version components
    'version',               # msvc version or msvc toolset version
])

def msvc_extended_version_components(version):
    """
    Decompose an msvc version or msvc toolset version into components.

    Args:
        version: str
            version specification

    Returns:
        None or MSVCExtendedVersionComponents namedtuple:
    """

    if not version:
        return None

    m = re_extended_version.match(version)
    if not m:
        return None

    msvc_toolset_version = m.group('version')
    msvc_toolset_comps = tuple(msvc_toolset_version.split('.'))

    msvc_verstr = get_msvc_version_prefix(msvc_toolset_version)
    if not msvc_verstr:
        return None

    msvc_suffix = m.group('suffix') if m.group('suffix') else ''
    msvc_version = msvc_verstr + msvc_suffix

    vs_def = Config.MSVC_VERSION_SUFFIX.get(msvc_version)
    if not vs_def:
        return None

    msvc_vernum = float(msvc_verstr)

    msvc_comps = tuple(msvc_verstr.split('.'))
    msvc_major, msvc_minor = [int(x) for x in msvc_comps]

    msvc_extended_version_components_def = _MSVC_EXTENDED_VERSION_COMPONENTS_DEFINITION(
        msvc_version = msvc_version,
        msvc_verstr = msvc_verstr,
        msvc_suffix = msvc_suffix,
        msvc_vernum = msvc_vernum,
        msvc_major = msvc_major,
        msvc_minor = msvc_minor,
        msvc_comps = msvc_comps,
        msvc_toolset_version = msvc_toolset_version,
        msvc_toolset_comps = msvc_toolset_comps,
        version = version,
    )

    return msvc_extended_version_components_def

# msvc sdk version decomposition utilties

_MSVC_SDK_VERSION_COMPONENTS_DEFINITION = namedtuple('MSVCSDKVersionComponentsDefinition', [
    'sdk_version', # sdk version (e.g., '10.0.20348.0')
    'sdk_verstr',  # sdk version numeric string (e.g., '10.0')
    'sdk_vernum',  # sdk version floating point number (e.g, 10.0)
    'sdk_major',   # sdk major version integer number (e.g., 10)
    'sdk_minor',   # sdk minor version integer number (e.g., 0)
    'sdk_comps',   # sdk version components tuple (e.g., ('10', '0', '20348', '0'))
])

def msvc_sdk_version_components(version):
    """
    Decompose an msvc sdk version into components.

    Tuple fields:
        sdk_version: sdk version (e.g., '10.0.20348.0')
        sdk_verstr:  sdk version numeric string (e.g., '10.0')
        sdk_vernum:  sdk version floating point number (e.g., 10.0)
        sdk_major:   sdk major version integer number (e.g., 10)
        sdk_minor:   sdk minor version integer number (e.g., 0)
        sdk_comps:   sdk version components tuple (e.g., ('10', '0', '20348', '0'))

    Args:
        version: str
            sdk version specification

    Returns:
        None or MSVCSDKVersionComponents namedtuple:
    """

    if not version:
        return None

    m = re_msvc_sdk_version.match(version)
    if not m:
        return None

    sdk_version = version
    sdk_comps = tuple(sdk_version.split('.'))
    sdk_verstr = '.'.join(sdk_comps[:2])
    sdk_vernum = float(sdk_verstr)

    sdk_major, sdk_minor = [int(x) for x in sdk_comps[:2]]

    msvc_sdk_version_components_def = _MSVC_SDK_VERSION_COMPONENTS_DEFINITION(
        sdk_version = sdk_version,
        sdk_verstr = sdk_verstr,
        sdk_vernum = sdk_vernum,
        sdk_major = sdk_major,
        sdk_minor = sdk_minor,
        sdk_comps = sdk_comps,
    )

    return msvc_sdk_version_components_def