# Copyright (c) 2010 Mitch Garnaat http://garnaat.org/
# Copyright (c) 2010, Eucalyptus Systems, Inc.
# All rights reserved.
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# Permission is hereby granted, free of charge, to any person obtaining a
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# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
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"""
Some unit tests for the S3 Versioning.
"""

import unittest
import time
from boto.s3.connection import S3Connection
from boto.exception import S3ResponseError
from boto.s3.deletemarker import DeleteMarker

class S3VersionTest (unittest.TestCase):

    def setUp(self):
        self.conn = S3Connection()
        self.bucket_name = 'version-%d' % int(time.time())
        self.bucket = self.conn.create_bucket(self.bucket_name)

    def tearDown(self):
        for k in self.bucket.list_versions():
            self.bucket.delete_key(k.name, version_id=k.version_id)
        self.bucket.delete()

    def test_1_versions(self):
        # check versioning off
        d = self.bucket.get_versioning_status()
        self.assertFalse(d.has_key('Versioning'))

        # enable versioning
        self.bucket.configure_versioning(versioning=True)
        d = self.bucket.get_versioning_status()
        self.assertEqual('Enabled', d['Versioning'])
        
        # create a new key in the versioned bucket
        k = self.bucket.new_key("foobar")
        s1 = 'This is v1'
        k.set_contents_from_string(s1)
        
        # remember the version id of this object
        v1 = k.version_id
        
        # now get the contents from s3 
        o1 = k.get_contents_as_string()
        
        # check to make sure content read from k is identical to original
        self.assertEqual(s1, o1)
        
        # now overwrite that same key with new data
        s2 = 'This is v2'
        k.set_contents_from_string(s2)
        v2 = k.version_id
        
        # now retrieve latest contents as a string and compare
        k2 = self.bucket.new_key("foobar")
        o2 = k2.get_contents_as_string()
        self.assertEqual(s2, o2)

        # next retrieve explicit versions and compare
        o1 = k.get_contents_as_string(version_id=v1)
        o2 = k.get_contents_as_string(version_id=v2)
        self.assertEqual(s1, o1)
        self.assertEqual(s2, o2)
        
        # Now list all versions and compare to what we have
        rs = self.bucket.get_all_versions()
        self.assertEqual(v2, rs[0].version_id)
        self.assertEqual(v1, rs[1].version_id)
        
        # Now do a regular list command and make sure only the new key shows up
        rs = self.bucket.get_all_keys()
        self.assertEqual(1, len(rs))
        
        # Now do regular delete
        self.bucket.delete_key('foobar')
        
        # Now list versions and make sure old versions are there
        # plus the DeleteMarker which is latest.
        rs = self.bucket.get_all_versions()
        self.assertEqual(3, len(rs))
        self.assertTrue(isinstance(rs[0], DeleteMarker))
        
        # Now delete v1 of the key
        self.bucket.delete_key('foobar', version_id=v1)
        
        # Now list versions again and make sure v1 is not there
        rs = self.bucket.get_all_versions()
        versions = [k.version_id for k in rs]
        self.assertTrue(v1 not in versions)
        self.assertTrue(v2 in versions)
        
        # Now suspend Versioning on the bucket
        self.bucket.configure_versioning(False)
        d = self.bucket.get_versioning_status()
        self.assertEqual('Suspended', d['Versioning'])
        
    def test_latest_version(self):
        self.bucket.configure_versioning(versioning=True)
        
        # add v1 of an object
        key_name = "key"
        kv1 = self.bucket.new_key(key_name)
        kv1.set_contents_from_string("v1")
        
        # read list which should contain latest v1
        listed_kv1 = iter(self.bucket.get_all_versions()).next()
        self.assertEqual(listed_kv1.name, key_name)
        self.assertEqual(listed_kv1.version_id, kv1.version_id)
        self.assertEqual(listed_kv1.is_latest, True)

        # add v2 of the object
        kv2 = self.bucket.new_key(key_name)
        kv2.set_contents_from_string("v2")

        # read 2 versions, confirm v2 is latest
        i = iter(self.bucket.get_all_versions())
        listed_kv2 = i.next()
        listed_kv1 = i.next()
        self.assertEqual(listed_kv2.version_id, kv2.version_id)
        self.assertEqual(listed_kv1.version_id, kv1.version_id)
        self.assertEqual(listed_kv2.is_latest, True)
        self.assertEqual(listed_kv1.is_latest, False)

        # delete key, which creates a delete marker as latest
        self.bucket.delete_key(key_name)
        i = iter(self.bucket.get_all_versions())
        listed_kv3 = i.next()
        listed_kv2 = i.next()
        listed_kv1 = i.next()
        self.assertNotEqual(listed_kv3.version_id, None)
        self.assertEqual(listed_kv2.version_id, kv2.version_id)
        self.assertEqual(listed_kv1.version_id, kv1.version_id)
        self.assertEqual(listed_kv3.is_latest, True)
        self.assertEqual(listed_kv2.is_latest, False)
        self.assertEqual(listed_kv1.is_latest, False)