"""Tests for the Inventory implementation"""
import os
import random
import tempfile
import time
import unittest

from minode import sql, shared, structure


# + __bool__
# + __contains__
# + __getitem__
# + __setitem__
# = cleanup
# + get
# + filter
# = select
# + vectors_to_send


class TestObjects():
    """
    A base class for the test case for shared.objects,
    containing tests for all the methods directly used in code.
    """
    # pylint: disable=no-member
    # A possibility of abstract test cases was rejected:
    # https://bugs.python.org/issue17519

    def test_set_get(self):
        """Put some objects and check presence and getting"""
        obj = structure.Object(
            int(time.time()), 42, 1, 1, object_payload=b'HELLO')
        self.assertFalse(obj.vector in self.objects)
        with self.assertRaises(KeyError):
            self.objects[obj.vector]  # pylint: disable=pointless-statement
        self.assertIsNone(self.objects.get(obj.vector))
        prev_len = len(self.objects)
        self.objects[obj.vector] = obj
        self.objects[obj.vector] = obj
        self.assertTrue(self.objects)
        self.assertEqual(len(self.objects), prev_len + 1)
        self.assertTrue(obj.vector in self.objects)
        obj1 = self.objects[obj.vector]
        self.assertEqual(obj.vector, obj1.vector)
        self.assertEqual(obj.data, obj1.data)

    def test_vectors_to_send(self):
        """Check vectors_to_send method"""
        needed = set()
        for _ in range(10):
            # wrong stream
            obj = structure.Object(
                int(time.time()) + 10, 42, 1, random.randint(1, 3),
                object_payload=os.urandom(32))
            self.objects[obj.vector] = obj
            # expired
            obj = structure.Object(
                int(time.time()) - 10, 42, 1, 4, object_payload=os.urandom(32))
            self.objects[obj.vector] = obj
            # interesting
            obj = structure.Object(
                int(time.time()) + 10, 42, 1, 4, object_payload=os.urandom(32))
            self.objects[obj.vector] = obj
            needed.add(obj.vector)

        self.assertEqual(
            set(next(self.objects.vectors_to_send(stream=4))), needed)
        self.assertTrue(
            set(next(self.objects.vectors_to_send())).difference(needed))

    def test_filter(self):
        """Check the objects filtering"""
        needed = set()
        tagged = set()
        tag = b'@' * 32
        for _ in range(10):
            # wrong type
            obj = structure.Object(
                int(time.time()), 0, 1, 5, object_payload=os.urandom(64))
            self.objects[obj.vector] = obj
            # wrong type, but the proper tag
            obj = structure.Object(
                int(time.time()) - 11000, 0, 4, random.choice([1, 2, 3, 5]),
                object_payload=tag + os.urandom(32))
            self.objects[obj.vector] = obj
            tagged.add(obj.vector)
            # wrong stream
            obj = structure.Object(
                int(time.time()), 33, 1, 1, object_payload=os.urandom(32))
            self.objects[obj.vector] = obj
            # interesting
            obj = structure.Object(
                int(time.time()) - 11000, 33, 1, 5,
                object_payload=os.urandom(32))
            self.objects[obj.vector] = obj
            needed.add(obj.vector)

        # stream and type
        self.assertTrue(needed)
        for obj in self.objects.filter(5, 33):
            needed.remove(obj.vector)
        self.assertFalse(needed)

        # tag
        self.assertTrue(tagged)
        for obj in self.objects.filter(tag=tag):
            tagged.remove(obj.vector)
        self.assertFalse(tagged)

    def test_cleanup(self):
        """Check cleaning up"""
        for _ in range(10):
            obj = structure.Object(
                int(time.time()) - random.randint(4, 5) * 3600,
                42, 1, 6, object_payload=os.urandom(32))
            self.objects[obj.vector] = obj
            obj = structure.Object(
                int(time.time()) - 2 * 3600,
                42, 1, 6, object_payload=os.urandom(32))
            self.objects[obj.vector] = obj

        for obj in self.objects.values():
            if obj.is_expired():
                break
        else:
            self.fail('No objects found to delete')

        self.objects.cleanup()
        self.assertTrue(self.objects)
        for obj in self.objects.values():
            self.assertFalse(obj.is_expired())

    def test_select(self):
        """Check the select method"""
        pending = set()
        questionable = set()

        for _ in range(5):
            obj = structure.Object(
                int(time.time()) - 10, 42, 1, 7, object_payload=os.urandom(32))
            questionable.add(obj.vector)
            self.objects[obj.vector] = obj
            obj = structure.Object(
                int(time.time()) + 10, 42, 1, 7, object_payload=os.urandom(32))
            questionable.add(obj.vector)
            pending.add(obj.vector)

        self.assertEqual(self.objects.select(questionable), pending)


class TestObjectsSQL(TestObjects, unittest.TestCase):
    """A test case for the sqlite inventory"""

    @classmethod
    def setUpClass(cls):
        shared.data_directory = tempfile.gettempdir()
        cls.tearDownClass()
        cls.objects = sql.Inventory()

    @classmethod
    def tearDownClass(cls):
        cls.objects = None
        os.remove(os.path.join(shared.data_directory, 'objects.dat'))