# -*- coding: utf-8 -*-
#
# Copyright (C) 2013 Vinay Sajip.
# Licensed to the Python Software Foundation under a contributor agreement.
# See LICENSE.txt and CONTRIBUTORS.txt.
#
from __future__ import unicode_literals

import codecs
import hashlib
import os
import re
import shutil
import subprocess
import sys
import tempfile

from compat import unittest

from distlib import DistlibException
from distlib.compat import ZipFile, sysconfig
from distlib.database import DistributionPath, InstalledDistribution
from distlib.manifest import Manifest
from distlib.metadata import Metadata, METADATA_FILENAME
from distlib.scripts import ScriptMaker
from distlib.wheel import (Wheel, PYVER, IMPVER, ARCH, ABI, COMPATIBLE_TAGS,
                           is_compatible)

try:
    with open(os.devnull, 'wb') as junk:
        subprocess.check_call(['pip', '--version'], stdout=junk,
                               stderr=subprocess.STDOUT)
    PIP_AVAILABLE = True
except Exception:
    PIP_AVAILABLE = False

HERE = os.path.abspath(os.path.dirname(__file__))

EGG_INFO_RE = re.compile(r'(-py\d\.\d)?\.egg-info', re.I)

def convert_egg_info(libdir, prefix):
    files = os.listdir(libdir)
    ei = list(filter(lambda d: d.endswith('.egg-info'), files))[0]
    olddn = os.path.join(libdir, ei)
    di = EGG_INFO_RE.sub('.dist-info', ei)
    newdn = os.path.join(libdir, di)
    os.rename(olddn, newdn)
    files = os.listdir(newdn)
    for oldfn in files:
        pn = os.path.join(newdn, oldfn)
        if oldfn == 'PKG-INFO':
            md = Metadata(path=pn)
            mn = os.path.join(newdn, METADATA_FILENAME)
            md.write(mn)
        os.remove(pn)
    manifest = Manifest(os.path.dirname(libdir))
    manifest.findall()
    dp = DistributionPath([libdir])
    dist = next(dp.get_distributions())
    dist.write_installed_files(manifest.allfiles, prefix)

def install_dist(distname, workdir):
    pfx = '--install-option='
    purelib = pfx + '--install-purelib=%s/purelib' % workdir
    platlib = pfx + '--install-platlib=%s/platlib' % workdir
    headers = pfx + '--install-headers=%s/headers' % workdir
    scripts = pfx + '--install-scripts=%s/scripts' % workdir
    data = pfx + '--install-data=%s/data' % workdir
    cmd = ['pip', 'install',
           '--index-url', 'https://pypi.python.org/simple/',
           '--timeout', '3', '--default-timeout', '3',
           purelib, platlib, headers, scripts, data, distname]
    result = {
        'scripts': os.path.join(workdir, 'scripts'),
        'headers': os.path.join(workdir, 'headers'),
        'data': os.path.join(workdir, 'data'),
    }
    p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
                         stderr=subprocess.STDOUT)
    stdout, _ = p.communicate()
    if p.returncode:
        raise ValueError('pip failed to install %s:\n%s' % (distname, stdout))
    for dn in ('purelib', 'platlib'):
        libdir = os.path.join(workdir, dn)
        if os.path.isdir(libdir):
            result[dn] = libdir
            break
    convert_egg_info(libdir, workdir)
    dp = DistributionPath([libdir])
    dist = next(dp.get_distributions())
    md = dist.metadata
    result['name'] = md.name
    result['version'] = md.version
    return result


class WheelTestCase(unittest.TestCase):

    def test_valid_filename(self):
        attrs = ('name', 'version', 'buildver', 'pyver', 'abi', 'arch')
        cases = (
            ('pkg-1.0.0-cp32.cp33-noabi-noarch.whl',
             ('pkg', '1.0.0', '', ['cp32', 'cp33'], ['noabi'],
              ['noarch'])),
            ('package-1.0.0-cp33-noabi-linux_x86_64.whl',
             ('package', '1.0.0', '', ['cp33'], ['noabi'],
              ['linux_x86_64'])),
            ('test-1.0-1st-py2.py3-none-win32.whl',
             ('test', '1.0', '1st', ['py2', 'py3'], ['none'], ['win32'])),
        )

        for name, values in cases:
            w = Wheel(name)
            self.assertEqual(w.wheel_version, (1, 1))
            self.assertEqual(w.filename, name)
            for attr, value in zip(attrs, values):
                self.assertEqual(getattr(w, attr), value)

    def test_invalid_filename(self):
        names = (
            '',
            'package.whl',
            'package-1.0.0-cp32.cp33.whl',
            'package-1.0.0-cp32.cp33.whl',
            'package-1.0.0-cp32.cp33-noabi.whl',
            'package-1.0.0-cp32.cp33-noabi-noarch.zip',
        )

        for name in names:
            self.assertRaises(DistlibException, Wheel, name)

    def test_valid_name(self):
        attrs = ('name', 'version', 'buildver', 'pyver', 'abi', 'arch')
        pyver = PYVER
        cases = (
            ('pkg-1.0.0',
             ('pkg', '1.0.0', '', [PYVER], ['none'], ['any'])),
            ('test-1.0-1st',
             ('test', '1.0', '1st', [PYVER], ['none'], ['any'])),
            (None,
             ('dummy', '0.1', '', [PYVER], ['none'], ['any'])),
        )

        ENDING = '-%s-none-any.whl' % PYVER
        for name, values in cases:
            w = Wheel(name)
            self.assertEqual(w.wheel_version, (1, 1))
            self.assertTrue(w.filename.endswith(ENDING))
            for attr, value in zip(attrs, values):
                self.assertEqual(getattr(w, attr), value)

    def test_compatible_tags(self):
        self.assertEqual(PYVER, 'py%d%d' % sys.version_info[:2])
        tags = COMPATIBLE_TAGS
        self.assertIn((PYVER, 'none', 'any'), tags)
        self.assertIn((PYVER[:-1], 'none', 'any'), tags)
        this_arch = filter(lambda o: o[-1] == ARCH, tags)
        self.assertTrue(this_arch)

    def test_is_compatible(self):
        fn = os.path.join(HERE, 'dummy-0.1-py27-none-any.whl')
        if 'py27' <= PYVER < 'py32':
            self.assertTrue(is_compatible(fn))
            self.assertTrue(Wheel(fn).is_compatible())

    def test_metadata(self):
        fn = os.path.join(HERE, 'dummy-0.1-py27-none-any.whl')
        w = Wheel(fn)
        md = w.metadata
        self.assertEqual(md.name, 'dummy')
        self.assertEqual(md.version, '0.1')

    def test_invalid(self):
        fn = os.path.join(HERE, 'dummy-0.1-py27-none-any.whl')
        w = Wheel(fn)
        self.assertRaises(DistlibException, w.get_hash, b'', 'badalgo')

    def check_built_wheel(self, wheel, expected):
        for key in expected:
            self.assertEqual(expected[key], getattr(wheel, key))
        fn = os.path.join(wheel.dirname, wheel.filename)
        self.assertTrue(os.path.exists(fn))
        name, version = wheel.name, wheel.version
        with ZipFile(fn, 'r') as zf:
            for key in ('scripts', 'headers', 'data'):
                arcname = '%s-%s.data/%s/%s_file.txt' % (name, version,
                                                         key, key)
                with zf.open(arcname) as bf:
                    data = bf.read()
                expected = ('dummy data - %s' % key).encode('utf-8')
                if key == 'scripts':
                    expected = b'#!python\n' + expected
                self.assertTrue(data, expected)

    def test_build_tags(self):
        workdir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, workdir)
        name = 'dummy'
        version = '0.1'
        paths = {'prefix': workdir}
        for key in ('purelib', 'platlib', 'headers', 'scripts', 'data'):
            paths[key] = p = os.path.join(workdir, key)
            os.makedirs(p)
            fn = os.path.join(p, '%s_file.txt' % key)
            with open(fn, 'w') as f:
                f.write('dummy data - %s' % key)
            if key in ('purelib', 'platlib'):
                p = os.path.join(p, '%s-%s.dist-info' % (name, version))
                os.makedirs(p)
                fn = os.path.join(p, 'RECORD')

        purelib = paths.pop('purelib')
        platlib = paths.pop('platlib')

        # Make a pure wheel with default tags
        paths['purelib'] = purelib
        wheel = Wheel('%s-%s' % (name, version))
        wheel.dirname = workdir
        wheel.build(paths)
        expected = {
            'name': name,
            'version': version,
            'pyver': [PYVER],
            'abi': ['none'],
            'arch': ['any'],
            'filename': 'dummy-0.1-%s-none-any.whl' % PYVER,
        }
        self.check_built_wheel(wheel, expected)
        # Make a pure wheel with custom tags
        pyver = [PYVER[:-1], PYVER]
        wheel.build(paths, {'pyver': pyver})
        expected = {
            'name': name,
            'version': version,
            'pyver': pyver,
            'abi': ['none'],
            'arch': ['any'],
            'filename': 'dummy-0.1-%s-none-any.whl' % '.'.join(pyver),
        }
        self.check_built_wheel(wheel, expected)

        # Make a non-pure wheel with default tags
        paths.pop('purelib')
        paths['platlib'] = platlib
        wheel.build(paths)
        expected['pyver'] = [IMPVER]
        expected['abi'] = [ABI]
        expected['arch'] = [ARCH]
        expected['filename'] = 'dummy-0.1-%s-%s-%s.whl' % (IMPVER, ABI, ARCH)
        self.check_built_wheel(wheel, expected)

    def do_build_and_install(self, dist):
        srcdir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, srcdir)
        dstdir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, dstdir)

        paths = install_dist(dist, srcdir)
        paths['prefix'] = srcdir
        w = Wheel()
        w.name = paths.pop('name')
        w.version = paths.pop('version')
        w.dirname = srcdir
        pathname = w.build(paths)
        self.assertTrue(os.path.exists(pathname))

        paths = {'prefix': dstdir}
        for key in ('purelib', 'platlib', 'headers', 'scripts', 'data'):
            paths[key] = os.path.join(dstdir, key)
        w = Wheel(pathname)
        maker = ScriptMaker(None, None, add_launchers=False)
        maker.executable = os.path.join(paths['scripts'], 'python')
        dist = w.install(paths, maker)
        self.assertIsNotNone(dist)
        self.assertEqual(dist.name, w.name)
        self.assertEqual(dist.version, w.version)
        shared = dist.shared_locations
        self.assertTrue(shared)
        os.remove(pathname)
        sm = Manifest(srcdir)
        sm.findall()
        sfiles = set([os.path.relpath(p, srcdir) for p in sm.allfiles])
        dm = Manifest(dstdir)
        dm.findall()
        dfiles = set([os.path.relpath(p, dstdir) for p in dm.allfiles])
        omitted = sfiles - dfiles
        omitted = omitted.pop()
        endings = os.path.join('.dist-info', 'WHEEL'), '.pyc', '.pyo'
        self.assertTrue(omitted.endswith(endings))

    def test_version_incompatibility(self):
        class Warner(object):
            def __call__(self, wheel_version, file_version):
                self.wheel_version = wheel_version
                self.file_version = file_version

        fn = os.path.join(HERE, 'dummy-0.1-py27-none-any.whl')
        dstdir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, dstdir)
        w = Wheel(fn)
        paths = {'prefix': dstdir}
        for key in ('purelib', 'platlib', 'headers', 'scripts', 'data'):
            paths[key] = os.path.join(dstdir, key)
        warner = Warner()
        maker = ScriptMaker(None, None)
        w.install(paths, maker, warner=warner)
        self.assertEqual(warner.wheel_version, w.wheel_version)
        self.assertEqual(warner.file_version, (2, 0))
        # Now set the wheel's instance to the higher value and ensure
        # warner isn't called
        warner = Warner()
        w.wheel_version = (2, 0)
        w.install(paths, maker, warner=warner)
        self.assertFalse(hasattr(warner, 'wheel_version'))
        self.assertFalse(hasattr(warner, 'file_version'))

    def test_verify(self):
        fn = os.path.join(HERE, 'dummy-0.1-py27-none-any.whl')
        w = Wheel(fn)
        w.verify()
        fn = os.path.join(HERE, 'bad_wheels', 'dummy-0.1-py27-none-any.whl')
        w = Wheel(fn)
        self.assertRaises(DistlibException, w.verify)

    def wheel_modifier_nop(self, path_map):
        return False

    def wheel_modifier(self, path_map):
        mdpath = path_map['dummy-0.1.dist-info/pydist.json']
        md = Metadata(path=mdpath)
        md.add_requirements(['numpy'])
        md.write(path=mdpath)
        return True

    def wheel_modifier_ver(self, path_map):
        mdpath = path_map['dummy-0.1.dist-info/pydist.json']
        md = Metadata(path=mdpath)
        md.version = '0.1-123'
        md.write(path=mdpath)
        return True

    def test_update(self):
        workdir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, workdir)
        fn = 'dummy-0.1-py27-none-any.whl'
        sfn = os.path.join(HERE, fn)
        dfn = os.path.join(workdir, fn)
        shutil.copyfile(sfn, dfn)
        mtime = os.stat(dfn).st_mtime
        w = Wheel(dfn)
        modified = w.update(self.wheel_modifier_nop)
        self.assertFalse(modified)
        self.assertEqual(mtime, os.stat(dfn).st_mtime)
        modified = w.update(self.wheel_modifier)
        self.assertTrue(modified)
        self.assertLessEqual(mtime, os.stat(dfn).st_mtime)
        w = Wheel(dfn)
        w.verify()
        md = w.metadata
        self.assertEqual(md.run_requires, [{'requires': ['numpy']}])
        self.assertEquals(md.version, '0.1-1')

        modified = w.update(self.wheel_modifier_ver)
        self.assertTrue(modified)
        self.assertLessEqual(mtime, os.stat(dfn).st_mtime)
        w = Wheel(dfn)
        w.verify()
        md = w.metadata
        self.assertEqual(md.run_requires, [{'requires': ['numpy']}])
        self.assertEquals(md.version, '0.1-123')

    def test_info(self):
        fn = os.path.join(HERE, 'dummy-0.1-py27-none-any.whl')
        w = Wheel(fn)
        actual = w.info
        actual.pop('Generator', None)
        expected = {
            'Root-Is-Purelib': 'true',
            'Tag': 'py27-none-any',
            'Wheel-Version': '2.0'
        }
        self.assertEqual(actual, expected)

    @unittest.skipIf(sys.version_info[:2] != (2, 7), 'The test wheel is only '
                                               '2.7 mountable')
    def test_mount(self):
        fn = os.path.join(HERE, 'dummy-0.1-py27-none-any.whl')
        w = Wheel(fn)
        self.assertNotIn(fn, sys.path)
        w.mount()
        self.assertIn(fn, sys.path)
        w.unmount()
        self.assertNotIn(fn, sys.path)

    def test_mount_extensions(self):
        if PYVER == 'py27':
            fn = 'minimext-0.1-cp27-none-linux_x86_64.whl'
        elif PYVER == 'py32':
            fn = 'minimext-0.1-cp32-cp32mu-linux_x86_64.whl'
        elif PYVER == 'py33':
            fn = 'minimext-0.1-cp33-cp33m-linux_x86_64.whl'
        else:
            fn = None
        if not fn:      # pragma: no cover
            raise unittest.SkipTest('Suitable wheel not found.')
        fn = os.path.join(HERE, fn)
        w = Wheel(fn)
        if not w.is_compatible() or not w.is_mountable():     # pragma: no cover
            raise unittest.SkipTest('Wheel not suitable for mounting.')
        self.assertRaises(ImportError, __import__, 'minimext')
        w.mount()
        mod = __import__('minimext')
        self.assertIs(mod, sys.modules['minimext'])
        self.assertEqual(mod.fib(10), 55)
        w.unmount()
        del sys.modules['minimext']
        self.assertRaises(ImportError, __import__, 'minimext')

    def test_local_version(self):
        w = Wheel('dummy-0.1_1.2')
        self.assertEqual(w.filename, 'dummy-0.1_1.2-%s'
                                     '-none-any.whl' % PYVER)
        self.assertEqual(w.name, 'dummy')
        self.assertEqual(w.version, '0.1-1.2')
        self.assertFalse(w.exists)
        w.version = '0.1-1.3'
        self.assertEqual(w.filename, 'dummy-0.1_1.3-%s'
                                     '-none-any.whl' % PYVER)

    def test_abi(self):
        pyver = sysconfig.get_config_var('py_version_nodot')
        if not pyver:
            pyver = '%s%s' % sys.version_info[:2]
        parts = ['cp', pyver]
        if sysconfig.get_config_var('Py_DEBUG'):
            parts.append('d')
        if sysconfig.get_config_var('WITH_PYMALLOC'):
            parts.append('m')
        if sysconfig.get_config_var('Py_UNICODE_SIZE') == 4:
            parts.append('u')
        self.assertEqual(''.join(parts), ABI)

    @unittest.skipIf('SKIP_SLOW' in os.environ, 'Skipping slow test')
    @unittest.skipUnless(PIP_AVAILABLE, 'pip is needed for this test')
    def test_build_and_install_pure(self):
        self.do_build_and_install('sarge == 0.1')

    @unittest.skipIf('SKIP_SLOW' in os.environ, 'Skipping slow test')
    @unittest.skipIf(hasattr(sys, 'pypy_version_info'), 'The test distribution'
                                               ' does not build on PyPy')
    @unittest.skipIf(sys.platform != 'linux2', 'The test distribution only '
                                               'builds on Linux')
    @unittest.skipUnless(PIP_AVAILABLE, 'pip is needed for this test')
    def test_build_and_install_plat(self):
        self.do_build_and_install('hiredis == 0.1.1')

    @unittest.skipIf('SKIP_SLOW' in os.environ, 'Skipping slow test')
    @unittest.skipIf(sys.version_info[0] == 3, 'The test distribution is not '
                                               '3.x compatible')
    @unittest.skipUnless(PIP_AVAILABLE, 'pip is needed for this test')
    def test_build_and_install_data(self):
        self.do_build_and_install('Werkzeug == 0.4')

    @unittest.skipIf('SKIP_SLOW' in os.environ, 'Skipping slow test')
    @unittest.skipIf(sys.version_info[0] == 3, 'The test distribution is not '
                                               '3.x compatible')
    @unittest.skipUnless(PIP_AVAILABLE, 'pip is needed for this test')
    def test_build_and_install_scripts(self):
        self.do_build_and_install('Babel == 0.9.6')

if __name__ == '__main__':  # pragma: no cover
    unittest.main()
