#!/usr/bin/python
#

# Copyright (C) 2012 Google Inc.
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"""Script for testing ganeti.masterd.iallocator"""

import unittest

from ganeti import compat
from ganeti import constants
from ganeti import errors
from ganeti import objects
from ganeti import ht
from ganeti.masterd import iallocator

import testutils


class _StubIAllocator(object):
  def __init__(self, success):
    self.success = success


class TestIAReqMultiInstanceAlloc(unittest.TestCase):
  def testResult(self):
    good_results = [
      # First result (all instances "allocate")
      [
        [["foo", ["a", "b"]],
         ["bar", ["c"]],
         ["baz", []]],
        []
      ],
      # Second result (partial "allocate", partial "fail")
      [
        [["bar", ["c", "b"]],
         ["baz", ["a"]]],
        ["foo"]
      ],
      # Third result (all instances "fail")
      [
        [],
        ["foo", "bar", "baz"]
      ],
      ]
    bad_results = [
      "foobar",
      1234,
      [],
      [[]],
      [[], [], []],
      ]

    result_fn = iallocator.IAReqMultiInstanceAlloc.REQ_RESULT

    self.assertTrue(compat.all(map(result_fn, good_results)))
    self.assertFalse(compat.any(map(result_fn, bad_results)))


class TestIARequestBase(unittest.TestCase):
  def testValidateResult(self):
    class _StubReqBase(iallocator.IARequestBase):
      MODE = constants.IALLOCATOR_MODE_ALLOC
      REQ_RESULT = ht.TBool

    stub = _StubReqBase()
    stub.ValidateResult(_StubIAllocator(True), True)
    self.assertRaises(errors.ResultValidationError, stub.ValidateResult,
                      _StubIAllocator(True), "foo")
    stub.ValidateResult(_StubIAllocator(False), True)
    # We don't validate the result if the iallocation request was not successful
    stub.ValidateResult(_StubIAllocator(False), "foo")


class _FakeConfigWithNdParams:
  def GetNdParams(self, _):
    return None
  def GetFilledHvStateParams(self, _):
    return None


class TestComputeBasicNodeData(unittest.TestCase):
  def setUp(self):
    self.fn = compat.partial(iallocator.IAllocator._ComputeBasicNodeData,
                             _FakeConfigWithNdParams())

  def testEmpty(self):
    self.assertEqual(self.fn({}), {})

  def testSimple(self):
    self.maxDiff = None
    node1 = objects.Node(name="node1",
                         primary_ip="192.0.2.1",
                         secondary_ip="192.0.2.2",
                         offline=False,
                         drained=False,
                         master_candidate=True,
                         master_capable=True,
                         group="11112222",
                         vm_capable=False)

    node2 = objects.Node(name="node2",
                         primary_ip="192.0.2.3",
                         secondary_ip="192.0.2.4",
                         offline=True,
                         drained=False,
                         master_candidate=False,
                         master_capable=False,
                         group="11112222",
                         vm_capable=True)

    assert node1 != node2

    ninfo = {
      "#unused-1#": node1,
      "#unused-2#": node2,
      }

    self.assertEqual(self.fn(ninfo), {
      "node1": {
        "tags": [],
        "primary_ip": "192.0.2.1",
        "secondary_ip": "192.0.2.2",
        "offline": False,
        "drained": False,
        "master_candidate": True,
        "group": "11112222",
        "master_capable": True,
        "vm_capable": False,
        "ndparams": None,
        "hv_state": None,
        },
      "node2": {
        "tags": [],
        "primary_ip": "192.0.2.3",
        "secondary_ip": "192.0.2.4",
        "offline": True,
        "drained": False,
        "master_candidate": False,
        "group": "11112222",
        "master_capable": False,
        "vm_capable": True,
        "ndparams": None,
        "hv_state": None,
        },
      })


class TestProcessStorageInfo(unittest.TestCase):

  def setUp(self):
    self.free_storage_file = 23
    self.total_storage_file = 42
    self.free_storage_lvm = 69
    self.total_storage_lvm = 666
    self.space_info = [{"name": "mynode",
                       "type": constants.ST_FILE,
                       "storage_free": self.free_storage_file,
                       "storage_size": self.total_storage_file},
                      {"name": "mynode",
                       "type": constants.ST_LVM_VG,
                       "storage_free": self.free_storage_lvm,
                       "storage_size": self.total_storage_lvm},
                      {"name": "mynode",
                       "type": constants.ST_LVM_PV,
                       "storage_free": 33,
                       "storage_size": 44}]

  def testComputeStorageDataFromNodeInfoDefault(self):
    has_lvm = False
    node_name = "mynode"
    (total_disk, free_disk, total_spindles, free_spindles) = \
        iallocator.IAllocator._ComputeStorageDataFromSpaceInfo(
            self.space_info, node_name, has_lvm)
    # FIXME: right now, iallocator ignores anything else than LVM, adjust
    # this test once that arbitrary storage is supported
    self.assertEqual(0, free_disk)
    self.assertEqual(0, total_disk)

  def testComputeStorageDataFromNodeInfoLvm(self):
    has_lvm = True
    node_name = "mynode"
    (total_disk, free_disk, total_spindles, free_spindles) = \
        iallocator.IAllocator._ComputeStorageDataFromSpaceInfo(
            self.space_info, node_name, has_lvm)
    self.assertEqual(self.free_storage_lvm, free_disk)
    self.assertEqual(self.total_storage_lvm, total_disk)

  def testComputeStorageDataFromSpaceInfoByTemplate(self):
    disk_template = constants.DT_FILE
    node_name = "mynode"
    (total_disk, free_disk, total_spindles, free_spindles) = \
        iallocator.IAllocator._ComputeStorageDataFromSpaceInfoByTemplate(
            self.space_info, node_name, disk_template)
    self.assertEqual(self.free_storage_file, free_disk)
    self.assertEqual(self.total_storage_file, total_disk)

  def testComputeStorageDataFromSpaceInfoByTemplateLvm(self):
    disk_template = constants.DT_PLAIN
    node_name = "mynode"
    (total_disk, free_disk, total_spindles, free_spindles) = \
        iallocator.IAllocator._ComputeStorageDataFromSpaceInfoByTemplate(
            self.space_info, node_name, disk_template)
    self.assertEqual(self.free_storage_lvm, free_disk)
    self.assertEqual(self.total_storage_lvm, total_disk)

  def testComputeStorageDataFromSpaceInfoByTemplateNoReport(self):
    disk_template = constants.DT_DISKLESS
    node_name = "mynode"
    (total_disk, free_disk, total_spindles, free_spindles) = \
        iallocator.IAllocator._ComputeStorageDataFromSpaceInfoByTemplate(
            self.space_info, node_name, disk_template)
    self.assertEqual(0, free_disk)
    self.assertEqual(0, total_disk)

if __name__ == "__main__":
  testutils.GanetiTestProgram()