import binascii

import unittest

import itertools

import silenttestrunner

from mercurial import parsers

HASH_1 = '1' * 40

HASH_2 = 'f' * 40

HASH_3 = '1234567890abcdef0987654321deadbeef0fcafe'

A_SHORT_MANIFEST = (

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

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

    ) % {'hash1': HASH_1,

         'flag1': '',

         'hash2': HASH_2,

         'flag2': 'l',

         }

HUGE_MANIFEST_ENTRIES = 200001

A_HUGE_MANIFEST = ''.join(sorted(

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

    itertools.izip(xrange(200001),

                   itertools.cycle((HASH_1, HASH_2)),

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

class testmanifest(unittest.TestCase):

    def assertIn(self, thing, container, msg=None):

        # assertIn new in 2.7, use it if available, otherwise polyfill

        sup = getattr(unittest.TestCase, 'assertIn', False)

        if sup:

            return sup(self, thing, container, msg=msg)

        if not msg:

            msg = 'Expected %r in %r' % (thing, container)

        self.assert_(thing in container, msg)

    def testEmptyManifest(self):

        m = parsers.lazymanifest('')

        self.assertEqual(0, len(m))

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

    def testManifest(self):

        m = parsers.lazymanifest(A_SHORT_MANIFEST)

        want = [

            ('bar/baz/qux.py', binascii.unhexlify(HASH_2), 'l'),

            ('foo', binascii.unhexlify(HASH_1), ''),

            ]

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

        self.assertEqual(want, list(m))

        self.assertEqual((binascii.unhexlify(HASH_1), ''), m['foo'])

        self.assertRaises(KeyError, lambda : m['wat'])

        self.assertEqual((binascii.unhexlify(HASH_2), 'l'),

                         m['bar/baz/qux.py'])

    def testSetItem(self):

        want = binascii.unhexlify(HASH_1), ''

        m = parsers.lazymanifest('')

        m['a'] = want

        self.assertIn('a', m)

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

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

        m = parsers.lazymanifest(A_SHORT_MANIFEST)

        m['a'] = want

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

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

                         m.text())

        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 = parsers.lazymanifest(A_SHORT_MANIFEST)

        m['alpha'] = h1, ''

        m['beta'] = h2, ''

        del m['foo']

        want = '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((h1, ''), m['alpha'])

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

        self.assertRaises(KeyError, lambda : m['foo'])

        w = [('alpha', h1, ''), ('bar/baz/qux.py', h2, 'l'), ('beta', h2, '')]

        self.assertEqual(w, list(m))

    def testSetGetNodeSuffix(self):

        clean = parsers.lazymanifest(A_SHORT_MANIFEST)

        m = parsers.lazymanifest(A_SHORT_MANIFEST)

        h, f = m['foo']

        want = h + 'a', f

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

        m['foo'] = want

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

        self.assertEqual([('bar/baz/qux.py', binascii.unhexlify(HASH_2), 'l'),

                          ('foo', binascii.unhexlify(HASH_1) + 'a', '')],

                         list(m))

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

        # return 21 and it'll work out

        m['foo'] = want[0] + '+', f

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

        # make sure the suffix survives a copy

        m2 = m.filtercopy(lambda x: x == 'foo')

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

        self.assertEqual(1, len(m2))

        self.assertEqual(('foo\0%s\n' % HASH_1), m2.text())

        m2 = m.copy()

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

        # suffix with iteration

        self.assertEqual([('bar/baz/qux.py', binascii.unhexlify(HASH_2), 'l'),

                          ('foo', want[0], '')], list(m))

        # shows up in diff

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

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

    def testFilterCopyException(self):

        m = parsers.lazymanifest(A_SHORT_MANIFEST)

        def filt(path):

            if path == 'foo':

                assert False

            return True

        self.assertRaises(AssertionError, m.filtercopy, filt)

    def testRemoveItem(self):

        m = parsers.lazymanifest(A_SHORT_MANIFEST)

        del m['foo']

        self.assertRaises(KeyError, lambda : m['foo'])

        self.assertEqual(1, len(m))

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

    def testManifestDiff(self):

        MISSING = (None, '')

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

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

        left = parsers.lazymanifest(

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

        right = parsers.lazymanifest(A_SHORT_MANIFEST + addr)

        want = {

            'foo': ((binascii.unhexlify(HASH_3), 'x'),

                    (binascii.unhexlify(HASH_1), '')),

            'z-only-in-left': ((binascii.unhexlify(HASH_1), ''), MISSING),

            'z-only-in-right': (MISSING, (binascii.unhexlify(HASH_2), 'x')),

            }

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

        want = {

            'bar/baz/qux.py': (MISSING, (binascii.unhexlify(HASH_2), 'l')),

            'foo': (MISSING, (binascii.unhexlify(HASH_3), 'x')),

            'z-only-in-left': (MISSING, (binascii.unhexlify(HASH_1), '')),

            }

        self.assertEqual(want, parsers.lazymanifest('').diff(left))

        want = {

            'bar/baz/qux.py': ((binascii.unhexlify(HASH_2), 'l'), MISSING),

            'foo': ((binascii.unhexlify(HASH_3), 'x'), MISSING),

            'z-only-in-left': ((binascii.unhexlify(HASH_1), ''), MISSING),

            }

        self.assertEqual(want, left.diff(parsers.lazymanifest('')))

        copy = right.copy()

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

        del right['foo']

        want = {

            'foo': (MISSING, (binascii.unhexlify(HASH_1), '')),

            'z-only-in-right': ((binascii.unhexlify(HASH_2), 'x'), MISSING),

            }

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

        short = parsers.lazymanifest(A_SHORT_MANIFEST)

        pruned = short.copy()

        del pruned['foo']

        want = {

            'foo': ((binascii.unhexlify(HASH_1), ''), MISSING),

            }

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

        want = {

            'foo': (MISSING, (binascii.unhexlify(HASH_1), '')),

            }

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

        want = {

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

            'foo': (MISSING, (binascii.unhexlify(HASH_1), '')),

            }

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

    def testReversedLines(self):

        backwards = ''.join(

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

        try:

            parsers.lazymanifest(backwards)

            self.fail('Should have raised ValueError')

        except ValueError, v:

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

    def testNoTerminalNewline(self):

        try:

            parsers.lazymanifest(A_SHORT_MANIFEST + 'wat')

            self.fail('Should have raised ValueError')

        except ValueError, v:

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

    def testNoNewLineAtAll(self):

        try:

            parsers.lazymanifest('wat')

            self.fail('Should have raised ValueError')

        except ValueError, v:

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

    def testHugeManifest(self):

        m = parsers.lazymanifest(A_HUGE_MANIFEST)

        self.assertEqual(HUGE_MANIFEST_ENTRIES, len(m))

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

if __name__ == '__main__':

    silenttestrunner.main(__name__)