import logging

import pytest
from core.concept import Concept, ConceptParts
from sheerkapickle import tags
from sheerkapickle.SheerkaPickler import SheerkaPickler
from sheerkapickle.SheerkaUnpickler import SheerkaUnpickler

from tests.TestUsingFileBasedSheerka import TestUsingFileBasedSheerka


class Obj:
    def __init__(self, a, b, c):
        self.a = a
        self.b = b
        self.c = c

    def __eq__(self, other):
        if id(self) == id(other):
            return True

        if not isinstance(other, Obj):
            return False

        return self.a == other.a and self.b == other.b and self.c == other.c

    def __hash__(self):
        return hash((self.a, self.b, self.c))


class TestSheerkaPickler(TestUsingFileBasedSheerka):

    @pytest.mark.parametrize("obj, expected", [
        (1, 1),
        (3.14, 3.14),
        ("a string", "a string"),
        (True, True),
        (None, None),
        ([1, 3.14, "a string"], [1, 3.14, "a string"]),
        ((1, 3.14, "a string"), {tags.TUPLE: [1, 3.14, "a string"]}),
        ({1}, {tags.SET: [1]}),
        ({"a": "a", "b": 3.14, "c": True}, {"a": "a", "b": 3.14, "c": True}),
        ({1: "a", 2: 3.14, 3: True}, {1: "a", 2: 3.14, 3: True}),
        ([1, [3.14, "a string"]], [1, [3.14, "a string"]]),
        ([1, (3.14, "a string")], [1, {tags.TUPLE: [3.14, "a string"]}]),
        ([], []),
        (ConceptParts.BODY, {tags.ENUM: "core.concept.ConceptParts.BODY"}),
    ])
    def test_i_can_flatten_and_restore_primitives(self, obj, expected):
        sheerka = self.get_sheerka()
        flatten = SheerkaPickler(sheerka).flatten(obj)
        assert flatten == expected

        decoded = SheerkaUnpickler(sheerka).restore(flatten)
        assert decoded == obj

    def test_i_can_flatten_and_restore_instances(self):
        sheerka = self.get_sheerka()

        obj1 = Obj(1, "b", True)
        obj2 = Obj(3.14, ("a", "b"), obj1)

        flatten = SheerkaPickler(sheerka).flatten(obj2)
        assert flatten == {'_sheerka/obj': 'tests.sheerkapickle.test_SheerkaPickler.Obj',
                           'a': 3.14,
                           'b': {'_sheerka/tuple': ['a', 'b']},
                           'c': {'_sheerka/obj': 'tests.sheerkapickle.test_SheerkaPickler.Obj',
                                 'a': 1,
                                 'b': 'b',
                                 'c': True}}

        decoded = SheerkaUnpickler(sheerka).restore(flatten)
        assert decoded == obj2

    def test_i_can_manage_circular_reference(self):
        sheerka = self.get_sheerka()

        obj1 = Obj(1, "b", True)
        obj1.c = obj1

        flatten = SheerkaPickler(sheerka).flatten(obj1)
        assert flatten == {'_sheerka/obj': 'tests.sheerkapickle.test_SheerkaPickler.Obj',
                           'a': 1,
                           'b': 'b',
                           'c': {'_sheerka/id': 0}}

        decoded = SheerkaUnpickler(sheerka).restore(flatten)
        assert decoded.a == obj1.a
        assert decoded.b == obj1.b
        assert decoded.c == decoded

    def test_i_can_flatten_obj_with_new_props(self):
        sheerka = self.get_sheerka()

        obj = Obj(1, "b", True)
        obj.z = "new prop"

        flatten = SheerkaPickler(sheerka).flatten(obj)
        assert flatten == {'_sheerka/obj': 'tests.sheerkapickle.test_SheerkaPickler.Obj',
                           'a': 1,
                           'b': 'b',
                           'c': True,
                           'z': "new prop"}

        decoded = SheerkaUnpickler(sheerka).restore(flatten)
        assert decoded == obj

    @pytest.mark.parametrize("obj, expected", [
        ({None: "a"}, {'null': "a"}),
        ({ConceptParts.BODY: "a"}, {'core.concept.ConceptParts.BODY': 'a'}),
        ({(1, 2): "a"}, {(1, 2): "a"}),
    ])
    def test_i_can_manage_specific_keys_in_dictionaries(self, obj, expected):
        sheerka = self.get_sheerka()

        flatten = SheerkaPickler(sheerka).flatten(obj)
        assert flatten == expected

        decoded = SheerkaUnpickler(sheerka).restore(flatten)
        assert decoded == obj

    def test_i_can_use_concept_as_dictionary_key(self):
        sheerka = self.get_sheerka()

        concept = Concept("foo").init_key()
        sheerka.set_id_if_needed(concept, False)
        sheerka.add_in_cache(concept)
        obj = {concept: "a"}
        flatten = SheerkaPickler(sheerka).flatten(obj)
        assert flatten == {'c:foo|1001:': 'a'}

        decoded = SheerkaUnpickler(sheerka).restore(flatten)
        assert decoded == obj

    def test_i_can_manage_references(self):
        sheerka = self.get_sheerka()

        foo = Obj("foo", "bar", "baz")
        obj = [ConceptParts.BODY, foo, ConceptParts.WHERE, ConceptParts.BODY, foo]
        flatten = SheerkaPickler(sheerka).flatten(obj)

        assert flatten == [{'_sheerka/enum': 'core.concept.ConceptParts.BODY'},
                           {'_sheerka/obj': 'tests.sheerkapickle.test_SheerkaPickler.Obj',
                            'a': 'foo',
                            'b': 'bar',
                            'c': 'baz'},
                           {'_sheerka/enum': 'core.concept.ConceptParts.WHERE'},
                           {'_sheerka/id': 0},
                           {'_sheerka/id': 1}]

        decoded = SheerkaUnpickler(sheerka).restore(flatten)
        assert decoded == obj

    def test_i_do_not_encode_logger(self):
        sheerka = self.get_sheerka()

        logger = logging.getLogger("log_name")
        logger2 = logging.getLogger("log_name2")
        obj = Obj("foo", logger, {"a": logger, "b": logger2})

        flatten = SheerkaPickler(sheerka).flatten(obj)
        decoded = SheerkaUnpickler(sheerka).restore(flatten)
        assert decoded == Obj("foo", None, {"a": None, "b": None})