#!/usr/bin/python
#

# Copyright (C) 2011 Google Inc.
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"""Script for testing ganeti.rapi.baserlib"""

import unittest
import itertools

from ganeti import errors
from ganeti import opcodes
from ganeti import ht
from ganeti import http
from ganeti import compat
from ganeti.rapi import baserlib

import testutils


class TestFillOpcode(unittest.TestCase):
  class OpTest(opcodes.OpCode):
    OP_PARAMS = [
      ("test", None, ht.TMaybeString, None),
      ]

  def test(self):
    for static in [None, {}]:
      op = baserlib.FillOpcode(self.OpTest, {}, static)
      self.assertTrue(isinstance(op, self.OpTest))
      self.assertTrue(op.test is None)

  def testStatic(self):
    op = baserlib.FillOpcode(self.OpTest, {}, {"test": "abc"})
    self.assertTrue(isinstance(op, self.OpTest))
    self.assertEqual(op.test, "abc")

    # Overwrite static parameter
    self.assertRaises(http.HttpBadRequest, baserlib.FillOpcode,
                      self.OpTest, {"test": 123}, {"test": "abc"})

  def testType(self):
    self.assertRaises(http.HttpBadRequest, baserlib.FillOpcode,
                      self.OpTest, {"test": [1, 2, 3]}, {})

  def testStaticType(self):
    self.assertRaises(http.HttpBadRequest, baserlib.FillOpcode,
                      self.OpTest, {}, {"test": [1, 2, 3]})

  def testUnicode(self):
    op = baserlib.FillOpcode(self.OpTest, {u"test": "abc"}, {})
    self.assertTrue(isinstance(op, self.OpTest))
    self.assertEqual(op.test, "abc")

    op = baserlib.FillOpcode(self.OpTest, {}, {u"test": "abc"})
    self.assertTrue(isinstance(op, self.OpTest))
    self.assertEqual(op.test, "abc")

  def testUnknownParameter(self):
    self.assertRaises(http.HttpBadRequest, baserlib.FillOpcode,
                      self.OpTest, {"othervalue": 123}, None)

  def testInvalidBody(self):
    self.assertRaises(http.HttpBadRequest, baserlib.FillOpcode,
                      self.OpTest, "", None)
    self.assertRaises(http.HttpBadRequest, baserlib.FillOpcode,
                      self.OpTest, range(10), None)

  def testRenameBothSpecified(self):
    self.assertRaises(http.HttpBadRequest, baserlib.FillOpcode,
                      self.OpTest, { "old": 123, "new": 999, }, None,
                      rename={ "old": "new", })

  def testRename(self):
    value = "Hello World"
    op = baserlib.FillOpcode(self.OpTest, { "data": value, }, None,
                             rename={ "data": "test", })
    self.assertEqual(op.test, value)

  def testRenameStatic(self):
    self.assertRaises(http.HttpBadRequest, baserlib.FillOpcode,
                      self.OpTest, { "data": 0, }, { "test": None, },
                      rename={ "data": "test", })


class TestOpcodeResource(unittest.TestCase):
  @staticmethod
  def _MakeClass(method, attrs):
    return type("Test%s" % method, (baserlib.OpcodeResource, ), attrs)

  @staticmethod
  def _GetMethodAttributes(method):
    attrs = ["%s_OPCODE" % method, "%s_RENAME" % method,
             "%s_ALIASES" % method, "%s_FORBIDDEN" % method,
             "Get%sOpInput" % method.capitalize()]
    assert attrs == dict((opattrs.method, opattrs.GetModifiers())
                         for opattrs in baserlib.OPCODE_ATTRS)[method]
    return attrs

  def test(self):
    for method in baserlib._SUPPORTED_METHODS:
      # Empty handler
      obj = self._MakeClass(method, {})(None, {}, None)
      for m_attr in baserlib.OPCODE_ATTRS:
        for attr in m_attr.GetAll():
          self.assertFalse(hasattr(obj, attr))

      # Direct handler function
      obj = self._MakeClass(method, {
        method: lambda _: None,
        })(None, {}, None)
      self.assertFalse(compat.all(hasattr(obj, attr)
                                  for i in baserlib._SUPPORTED_METHODS
                                  for attr in self._GetMethodAttributes(i)))

      # Let metaclass define handler function
      for opcls in [None, object()]:
        obj = self._MakeClass(method, {
          "%s_OPCODE" % method: opcls,
          })(None, {}, None)
        self.assertTrue(callable(getattr(obj, method)))
        self.assertEqual(getattr(obj, "%s_OPCODE" % method), opcls)
        self.assertFalse(hasattr(obj, "%s_RENAME" % method))
        self.assertFalse(compat.any(hasattr(obj, attr)
                                    for i in baserlib._SUPPORTED_METHODS
                                      if i != method
                                    for attr in self._GetMethodAttributes(i)))

  def testIllegalRename(self):
    class _TClass(baserlib.OpcodeResource):
      PUT_RENAME = None
      def PUT(self): pass

    self.assertRaises(AssertionError, _TClass, None, None, None)

  def testEmpty(self):
    class _Empty(baserlib.OpcodeResource):
      pass

    obj = _Empty(None, {}, None)

    for m_attr in baserlib.OPCODE_ATTRS:
        for attr in m_attr.GetAll():
          self.assertFalse(hasattr(obj, attr))


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