from __future__ import absolute_import

import binascii

import itertools

import silenttestrunner

import unittest

import zlib

from mercurial import (

    manifest as manifestmod,

    match as matchmod,

)

EMTPY_MANIFEST = b''

HASH_1 = b'1' * 40

BIN_HASH_1 = binascii.unhexlify(HASH_1)

HASH_2 = b'f' * 40

BIN_HASH_2 = binascii.unhexlify(HASH_2)

HASH_3 = b'1234567890abcdef0987654321deadbeef0fcafe'

BIN_HASH_3 = binascii.unhexlify(HASH_3)

A_SHORT_MANIFEST = (

    b'bar/baz/qux.py\0%(hash2)s%(flag2)s\n'

    b'foo\0%(hash1)s%(flag1)s\n'

    ) % {b'hash1': HASH_1,

         b'flag1': b'',

         b'hash2': HASH_2,

         b'flag2': b'l',

         }

A_DEEPER_MANIFEST = (

    b'a/b/c/bar.py\0%(hash3)s%(flag1)s\n'

    b'a/b/c/bar.txt\0%(hash1)s%(flag1)s\n'

    b'a/b/c/foo.py\0%(hash3)s%(flag1)s\n'

    b'a/b/c/foo.txt\0%(hash2)s%(flag2)s\n'

    b'a/b/d/baz.py\0%(hash3)s%(flag1)s\n'

    b'a/b/d/qux.py\0%(hash1)s%(flag2)s\n'

    b'a/b/d/ten.txt\0%(hash3)s%(flag2)s\n'

    b'a/b/dog.py\0%(hash3)s%(flag1)s\n'

    b'a/b/fish.py\0%(hash2)s%(flag1)s\n'

    b'a/c/london.py\0%(hash3)s%(flag2)s\n'

    b'a/c/paper.txt\0%(hash2)s%(flag2)s\n'

    b'a/c/paris.py\0%(hash2)s%(flag1)s\n'

    b'a/d/apple.py\0%(hash3)s%(flag1)s\n'

    b'a/d/pizza.py\0%(hash3)s%(flag2)s\n'

    b'a/green.py\0%(hash1)s%(flag2)s\n'

    b'a/purple.py\0%(hash2)s%(flag1)s\n'

    b'app.py\0%(hash3)s%(flag1)s\n'

    b'readme.txt\0%(hash2)s%(flag1)s\n'

    ) % {b'hash1': HASH_1,

         b'flag1': b'',

         b'hash2': HASH_2,

         b'flag2': b'l',

         b'hash3': HASH_3,

         }

HUGE_MANIFEST_ENTRIES = 200001

izip = getattr(itertools, 'izip', zip)

if 'xrange' not in globals():

    xrange = range

A_HUGE_MANIFEST = b''.join(sorted(

    b'file%d\0%s%s\n' % (i, h, f) for i, h, f in

    izip(xrange(200001),

         itertools.cycle((HASH_1, HASH_2)),

         itertools.cycle((b'', b'x', b'l')))))

class basemanifesttests(object):

    def parsemanifest(self, text):

        raise NotImplementedError('parsemanifest not implemented by test case')

    def testEmptyManifest(self):

        m = self.parsemanifest(EMTPY_MANIFEST)

        self.assertEqual(0, len(m))

        self.assertEqual([], list(m))

    def testManifest(self):

        m = self.parsemanifest(A_SHORT_MANIFEST)

        self.assertEqual([b'bar/baz/qux.py', b'foo'], list(m))

        self.assertEqual(BIN_HASH_2, m[b'bar/baz/qux.py'])

        self.assertEqual(b'l', m.flags(b'bar/baz/qux.py'))

        self.assertEqual(BIN_HASH_1, m[b'foo'])

        self.assertEqual(b'', m.flags(b'foo'))

        with self.assertRaises(KeyError):

            m[b'wat']

    def testSetItem(self):

        want = BIN_HASH_1

        m = self.parsemanifest(EMTPY_MANIFEST)

        m[b'a'] = want

        self.assertIn(b'a', m)

        self.assertEqual(want, m[b'a'])

        self.assertEqual(b'a\0' + HASH_1 + b'\n', m.text())

        m = self.parsemanifest(A_SHORT_MANIFEST)

        m[b'a'] = want

        self.assertEqual(want, m[b'a'])

        self.assertEqual(b'a\0' + HASH_1 + b'\n' + A_SHORT_MANIFEST,

                         m.text())

    def testSetFlag(self):

        want = b'x'

        m = self.parsemanifest(EMTPY_MANIFEST)

        # first add a file; a file-less flag makes no sense

        m[b'a'] = BIN_HASH_1

        m.setflag(b'a', want)

        self.assertEqual(want, m.flags(b'a'))

        self.assertEqual(b'a\0' + HASH_1 + want + b'\n', m.text())

        m = self.parsemanifest(A_SHORT_MANIFEST)

        # first add a file; a file-less flag makes no sense

        m[b'a'] = BIN_HASH_1

        m.setflag(b'a', want)

        self.assertEqual(want, m.flags(b'a'))

        self.assertEqual(b'a\0' + HASH_1 + want + b'\n' + A_SHORT_MANIFEST,

                         m.text())

    def testCopy(self):

        m = self.parsemanifest(A_SHORT_MANIFEST)

        m[b'a'] = BIN_HASH_1

        m2 = m.copy()

        del m

        del m2 # make sure we don't double free() anything

    def testCompaction(self):

        unhex = binascii.unhexlify

        h1, h2 = unhex(HASH_1), unhex(HASH_2)

        m = self.parsemanifest(A_SHORT_MANIFEST)

        m[b'alpha'] = h1

        m[b'beta'] = h2

        del m[b'foo']

        want = b'alpha\0%s\nbar/baz/qux.py\0%sl\nbeta\0%s\n' % (

            HASH_1, HASH_2, HASH_2)

        self.assertEqual(want, m.text())

        self.assertEqual(3, len(m))

        self.assertEqual([b'alpha', b'bar/baz/qux.py', b'beta'], list(m))

        self.assertEqual(h1, m[b'alpha'])

        self.assertEqual(h2, m[b'bar/baz/qux.py'])

        self.assertEqual(h2, m[b'beta'])

        self.assertEqual(b'', m.flags(b'alpha'))

        self.assertEqual(b'l', m.flags(b'bar/baz/qux.py'))

        self.assertEqual(b'', m.flags(b'beta'))

        with self.assertRaises(KeyError):

            m[b'foo']

    def testSetGetNodeSuffix(self):

        clean = self.parsemanifest(A_SHORT_MANIFEST)

        m = self.parsemanifest(A_SHORT_MANIFEST)

        h = m[b'foo']

        f = m.flags(b'foo')

        want = h + b'a'

        # Merge code wants to set 21-byte fake hashes at times

        m[b'foo'] = want

        self.assertEqual(want, m[b'foo'])

        self.assertEqual([(b'bar/baz/qux.py', BIN_HASH_2),

                          (b'foo', BIN_HASH_1 + b'a')],

                         list(m.items()))

        # Sometimes it even tries a 22-byte fake hash, but we can

        # return 21 and it'll work out

        m[b'foo'] = want + b'+'

        self.assertEqual(want, m[b'foo'])

        # make sure the suffix survives a copy

        match = matchmod.match(b'', b'', [b're:foo'])

        m2 = m.matches(match)

        self.assertEqual(want, m2[b'foo'])

        self.assertEqual(1, len(m2))

        m2 = m.copy()

        self.assertEqual(want, m2[b'foo'])

        # suffix with iteration

        self.assertEqual([(b'bar/baz/qux.py', BIN_HASH_2),

                          (b'foo', want)],

                         list(m.items()))

        # shows up in diff

        self.assertEqual({b'foo': ((want, f), (h, b''))}, m.diff(clean))

        self.assertEqual({b'foo': ((h, b''), (want, f))}, clean.diff(m))

    def testMatchException(self):

        m = self.parsemanifest(A_SHORT_MANIFEST)

        match = matchmod.match(b'', b'', [b're:.*'])

        def filt(path):

            if path == b'foo':

                assert False

            return True

        match.matchfn = filt

        with self.assertRaises(AssertionError):

            m.matches(match)

    def testRemoveItem(self):

        m = self.parsemanifest(A_SHORT_MANIFEST)

        del m[b'foo']

        with self.assertRaises(KeyError):

            m[b'foo']

        self.assertEqual(1, len(m))

        self.assertEqual(1, len(list(m)))

        # now restore and make sure everything works right

        m[b'foo'] = b'a' * 20

        self.assertEqual(2, len(m))

        self.assertEqual(2, len(list(m)))

    def testManifestDiff(self):

        MISSING = (None, b'')

        addl = b'z-only-in-left\0' + HASH_1 + b'\n'

        addr = b'z-only-in-right\0' + HASH_2 + b'x\n'

        left = self.parsemanifest(

            A_SHORT_MANIFEST.replace(HASH_1, HASH_3 + b'x') + addl)

        right = self.parsemanifest(A_SHORT_MANIFEST + addr)

        want = {

            b'foo': ((BIN_HASH_3, b'x'),

                     (BIN_HASH_1, b'')),

            b'z-only-in-left': ((BIN_HASH_1, b''), MISSING),

            b'z-only-in-right': (MISSING, (BIN_HASH_2, b'x')),

            }

        self.assertEqual(want, left.diff(right))

        want = {

            b'bar/baz/qux.py': (MISSING, (BIN_HASH_2, b'l')),

            b'foo': (MISSING, (BIN_HASH_3, b'x')),

            b'z-only-in-left': (MISSING, (BIN_HASH_1, b'')),

            }

        self.assertEqual(want, self.parsemanifest(EMTPY_MANIFEST).diff(left))

        want = {

            b'bar/baz/qux.py': ((BIN_HASH_2, b'l'), MISSING),

            b'foo': ((BIN_HASH_3, b'x'), MISSING),

            b'z-only-in-left': ((BIN_HASH_1, b''), MISSING),

            }

        self.assertEqual(want, left.diff(self.parsemanifest(EMTPY_MANIFEST)))

        copy = right.copy()

        del copy[b'z-only-in-right']

        del right[b'foo']

        want = {

            b'foo': (MISSING, (BIN_HASH_1, b'')),

            b'z-only-in-right': ((BIN_HASH_2, b'x'), MISSING),

            }

        self.assertEqual(want, right.diff(copy))

        short = self.parsemanifest(A_SHORT_MANIFEST)

        pruned = short.copy()

        del pruned[b'foo']

        want = {

            b'foo': ((BIN_HASH_1, b''), MISSING),

            }

        self.assertEqual(want, short.diff(pruned))

        want = {

            b'foo': (MISSING, (BIN_HASH_1, b'')),

            }

        self.assertEqual(want, pruned.diff(short))

        want = {

            b'bar/baz/qux.py': None,

            b'foo': (MISSING, (BIN_HASH_1, b'')),

            }

        self.assertEqual(want, pruned.diff(short, clean=True))

    def testReversedLines(self):

        backwards = b''.join(

            l + b'\n' for l in reversed(A_SHORT_MANIFEST.split(b'\n')) if l)

        try:

            self.parsemanifest(backwards)

            self.fail('Should have raised ValueError')

        except ValueError as v:

            self.assertIn('Manifest lines not in sorted order.', str(v))

    def testNoTerminalNewline(self):

        try:

            self.parsemanifest(A_SHORT_MANIFEST + b'wat')

            self.fail('Should have raised ValueError')

        except ValueError as v:

            self.assertIn('Manifest did not end in a newline.', str(v))

    def testNoNewLineAtAll(self):

        try:

            self.parsemanifest(b'wat')

            self.fail('Should have raised ValueError')

        except ValueError as v:

            self.assertIn('Manifest did not end in a newline.', str(v))

    def testHugeManifest(self):

        m = self.parsemanifest(A_HUGE_MANIFEST)

        self.assertEqual(HUGE_MANIFEST_ENTRIES, len(m))

        self.assertEqual(len(m), len(list(m)))

    def testMatchesMetadata(self):

        '''Tests matches() for a few specific files to make sure that both

        the set of files as well as their flags and nodeids are correct in

        the resulting manifest.'''

        m = self.parsemanifest(A_HUGE_MANIFEST)

        match = matchmod.match(b'/', b'',

                [b'file1', b'file200', b'file300'], exact=True)

        m2 = m.matches(match)

        w = (b'file1\0%sx\n'

             b'file200\0%sl\n'

             b'file300\0%s\n') % (HASH_2, HASH_1, HASH_1)

        self.assertEqual(w, m2.text())

    def testMatchesNonexistentFile(self):

        '''Tests matches() for a small set of specific files, including one

        nonexistent file to make sure in only matches against existing files.

        '''

        m = self.parsemanifest(A_DEEPER_MANIFEST)

        match = matchmod.match(b'/', b'',

                [b'a/b/c/bar.txt', b'a/b/d/qux.py',

                 b'readme.txt', b'nonexistent'],

                exact=True)

        m2 = m.matches(match)

        self.assertEqual(

                [b'a/b/c/bar.txt', b'a/b/d/qux.py', b'readme.txt'],

                m2.keys())

    def testMatchesNonexistentDirectory(self):

        '''Tests matches() for a relpath match on a directory that doesn't

        actually exist.'''

        m = self.parsemanifest(A_DEEPER_MANIFEST)

        match = matchmod.match(b'/', b'', [b'a/f'], default=b'relpath')

        m2 = m.matches(match)

        self.assertEqual([], m2.keys())

    def testMatchesExactLarge(self):

        '''Tests matches() for files matching a large list of exact files.

        '''

        m = self.parsemanifest(A_HUGE_MANIFEST)

        flist = m.keys()[80:300]

        match = matchmod.match(b'/', b'', flist, exact=True)

        m2 = m.matches(match)

        self.assertEqual(flist, m2.keys())

    def testMatchesFull(self):

        '''Tests matches() for what should be a full match.'''

        m = self.parsemanifest(A_DEEPER_MANIFEST)

        match = matchmod.match(b'/', b'', [b''])

        m2 = m.matches(match)

        self.assertEqual(m.keys(), m2.keys())

    def testMatchesDirectory(self):

        '''Tests matches() on a relpath match on a directory, which should

        match against all files within said directory.'''

        m = self.parsemanifest(A_DEEPER_MANIFEST)