import sys
import os
import unittest
import platform
import subprocess

from test import support

class PlatformTest(unittest.TestCase):
    def test_architecture(self):
        res = platform.architecture()

    @support.skip_unless_symlink
    def test_architecture_via_symlink(self): # issue3762
        # On Windows, the EXE needs to know where pythonXY.dll is at so we have
        # to add the directory to the path.
        if sys.platform == "win32":
            os.environ["Path"] = "{};{}".format(
                os.path.dirname(sys.executable), os.environ["Path"])

        def get(python):
            cmd = [python, '-c',
                'import platform; print(platform.architecture())']
            p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
            return p.communicate()
        real = os.path.realpath(sys.executable)
        link = os.path.abspath(support.TESTFN)
        os.symlink(real, link)
        try:
            self.assertEqual(get(real), get(link))
        finally:
            os.remove(link)

    def test_platform(self):
        for aliased in (False, True):
            for terse in (False, True):
                res = platform.platform(aliased, terse)

    def test_system(self):
        res = platform.system()

    def test_node(self):
        res = platform.node()

    def test_release(self):
        res = platform.release()

    def test_version(self):
        res = platform.version()

    def test_machine(self):
        res = platform.machine()

    def test_processor(self):
        res = platform.processor()

    def setUp(self):
        self.save_version = sys.version
        self.save_subversion = sys.subversion
        self.save_platform = sys.platform

    def tearDown(self):
        sys.version = self.save_version
        sys.subversion = self.save_subversion
        sys.platform = self.save_platform

    def test_sys_version(self):
        # Old test.
        for input, output in (
            ('2.4.3 (#1, Jun 21 2006, 13:54:21) \n[GCC 3.3.4 (pre 3.3.5 20040809)]',
             ('CPython', '2.4.3', '', '', '1', 'Jun 21 2006 13:54:21', 'GCC 3.3.4 (pre 3.3.5 20040809)')),
            ('IronPython 1.0.60816 on .NET 2.0.50727.42',
             ('IronPython', '1.0.60816', '', '', '', '', '.NET 2.0.50727.42')),
            ('IronPython 1.0 (1.0.61005.1977) on .NET 2.0.50727.42',
             ('IronPython', '1.0.0', '', '', '', '', '.NET 2.0.50727.42')),
            ):
            # branch and revision are not "parsed", but fetched
            # from sys.subversion.  Ignore them
            (name, version, branch, revision, buildno, builddate, compiler) \
                   = platform._sys_version(input)
            self.assertEqual(
                (name, version, '', '', buildno, builddate, compiler), output)

        # Tests for python_implementation(), python_version(), python_branch(),
        # python_revision(), python_build(), and python_compiler().
        sys_versions = {
            ("2.6.1 (r261:67515, Dec  6 2008, 15:26:00) \n[GCC 4.0.1 (Apple Computer, Inc. build 5370)]",
             ('CPython', 'tags/r261', '67515'), self.save_platform)
            :
                ("CPython", "2.6.1", "tags/r261", "67515",
                 ('r261:67515', 'Dec  6 2008 15:26:00'),
                 'GCC 4.0.1 (Apple Computer, Inc. build 5370)'),
            ("IronPython 2.0 (2.0.0.0) on .NET 2.0.50727.3053", None, "cli")
            :
                ("IronPython", "2.0.0", "", "", ("", ""),
                 ".NET 2.0.50727.3053"),
            ("2.5 (trunk:6107, Mar 26 2009, 13:02:18) \n[Java HotSpot(TM) Client VM (\"Apple Computer, Inc.\")]",
            ('Jython', 'trunk', '6107'), "java1.5.0_16")
            :
                ("Jython", "2.5.0", "trunk", "6107",
                 ('trunk:6107', 'Mar 26 2009'), "java1.5.0_16"),
            ("2.5.2 (63378, Mar 26 2009, 18:03:29)\n[PyPy 1.0.0]",
             ('PyPy', 'trunk', '63378'), self.save_platform)
            :
                ("PyPy", "2.5.2", "trunk", "63378", ('63378', 'Mar 26 2009'),
                 "")
            }
        for (version_tag, subversion, sys_platform), info in \
                sys_versions.items():
            sys.version = version_tag
            if subversion is None:
                if hasattr(sys, "subversion"):
                    del sys.subversion
            else:
                sys.subversion = subversion
            if sys_platform is not None:
                sys.platform = sys_platform
            self.assertEqual(platform.python_implementation(), info[0])
            self.assertEqual(platform.python_version(), info[1])
            self.assertEqual(platform.python_branch(), info[2])
            self.assertEqual(platform.python_revision(), info[3])
            self.assertEqual(platform.python_build(), info[4])
            self.assertEqual(platform.python_compiler(), info[5])

    def test_system_alias(self):
        res = platform.system_alias(
            platform.system(),
            platform.release(),
            platform.version(),
        )

    def test_uname(self):
        res = platform.uname()
        self.assertTrue(any(res))

    @unittest.skipUnless(sys.platform.startswith('win'), "windows only test")
    def test_uname_win32_ARCHITEW6432(self):
        # Issue 7860: make sure we get architecture from the correct variable
        # on 64 bit Windows: if PROCESSOR_ARCHITEW6432 exists we should be
        # using it, per
        # http://blogs.msdn.com/david.wang/archive/2006/03/26/HOWTO-Detect-Process-Bitness.aspx
        try:
            with support.EnvironmentVarGuard() as environ:
                if 'PROCESSOR_ARCHITEW6432' in environ:
                    del environ['PROCESSOR_ARCHITEW6432']
                environ['PROCESSOR_ARCHITECTURE'] = 'foo'
                platform._uname_cache = None
                system, node, release, version, machine, processor = platform.uname()
                self.assertEqual(machine, 'foo')
                environ['PROCESSOR_ARCHITEW6432'] = 'bar'
                platform._uname_cache = None
                system, node, release, version, machine, processor = platform.uname()
                self.assertEqual(machine, 'bar')
        finally:
            platform._uname_cache = None

    def test_java_ver(self):
        res = platform.java_ver()
        if sys.platform == 'java':
            self.assertTrue(all(res))

    def test_win32_ver(self):
        res = platform.win32_ver()

    def test_mac_ver(self):
        res = platform.mac_ver()

        if platform.uname()[0] == 'Darwin':
            # We're on a MacOSX system, check that
            # the right version information is returned
            fd = os.popen('sw_vers', 'r')
            real_ver = None
            for ln in fd:
                if ln.startswith('ProductVersion:'):
                    real_ver = ln.strip().split()[-1]
                    break
            fd.close()
            self.assertFalse(real_ver is None)
            result_list = res[0].split('.')
            expect_list = real_ver.split('.')
            len_diff = len(result_list) - len(expect_list)
            # On Snow Leopard, sw_vers reports 10.6.0 as 10.6
            if len_diff > 0:
                expect_list.extend(['0'] * len_diff)
            self.assertEqual(result_list, expect_list)

            # res[1] claims to contain
            # (version, dev_stage, non_release_version)
            # That information is no longer available
            self.assertEqual(res[1], ('', '', ''))

            if sys.byteorder == 'little':
                self.assertEqual(res[2], 'i386')
            else:
                self.assertEqual(res[2], 'PowerPC')


    @unittest.skipUnless(sys.platform == 'darwin', "OSX only test")
    def test_mac_ver_with_fork(self):
        # Issue7895: platform.mac_ver() crashes when using fork without exec
        #
        # This test checks that the fix for that issue works.
        #
        pid = os.fork()
        if pid == 0:
            # child
            info = platform.mac_ver()
            os._exit(0)

        else:
            # parent
            cpid, sts = os.waitpid(pid, 0)
            self.assertEqual(cpid, pid)
            self.assertEqual(sts, 0)

    def test_dist(self):
        res = platform.dist()

    def test_libc_ver(self):
        import os
        if os.path.isdir(sys.executable) and \
           os.path.exists(sys.executable+'.exe'):
            # Cygwin horror
            executable = sys.executable + '.exe'
        else:
            executable = sys.executable
        res = platform.libc_ver(executable)

    def test_parse_release_file(self):

        for input, output in (
            # Examples of release file contents:
            ('SuSE Linux 9.3 (x86-64)', ('SuSE Linux ', '9.3', 'x86-64')),
            ('SUSE LINUX 10.1 (X86-64)', ('SUSE LINUX ', '10.1', 'X86-64')),
            ('SUSE LINUX 10.1 (i586)', ('SUSE LINUX ', '10.1', 'i586')),
            ('Fedora Core release 5 (Bordeaux)', ('Fedora Core', '5', 'Bordeaux')),
            ('Red Hat Linux release 8.0 (Psyche)', ('Red Hat Linux', '8.0', 'Psyche')),
            ('Red Hat Linux release 9 (Shrike)', ('Red Hat Linux', '9', 'Shrike')),
            ('Red Hat Enterprise Linux release 4 (Nahant)', ('Red Hat Enterprise Linux', '4', 'Nahant')),
            ('CentOS release 4', ('CentOS', '4', None)),
            ('Rocks release 4.2.1 (Cydonia)', ('Rocks', '4.2.1', 'Cydonia')),
            ('', ('', '', '')), # If there's nothing there.
            ):
            self.assertEqual(platform._parse_release_file(input), output)


def test_main():
    support.run_unittest(
        PlatformTest
    )

if __name__ == '__main__':
    test_main()