import uuid

from bson import Binary
import pytest

from mongoengine import *
from tests.utils import MongoDBTestCase

BIN_VALUE = "\xa9\xf3\x8d(\xd7\x03\x84\xb4k[\x0f\xe3\xa2\x19\x85p[J\xa3\xd2>\xde\xe6\x87\xb1\x7f\xc6\xe6\xd9r\x18\xf5".encode(
    "latin-1"
)


class TestBinaryField(MongoDBTestCase):
    def test_binary_fields(self):
        """Ensure that binary fields can be stored and retrieved."""

        class Attachment(Document):
            content_type = StringField()
            blob = BinaryField()

        BLOB = b"\xe6\x00\xc4\xff\x07"
        MIME_TYPE = "application/octet-stream"

        Attachment.drop_collection()

        attachment = Attachment(content_type=MIME_TYPE, blob=BLOB)
        attachment.save()

        attachment_1 = Attachment.objects().first()
        assert MIME_TYPE == attachment_1.content_type
        assert BLOB == bytes(attachment_1.blob)

    def test_validation_succeeds(self):
        """Ensure that valid values can be assigned to binary fields."""

        class AttachmentRequired(Document):
            blob = BinaryField(required=True)

        class AttachmentSizeLimit(Document):
            blob = BinaryField(max_bytes=4)

        attachment_required = AttachmentRequired()
        with pytest.raises(ValidationError):
            attachment_required.validate()
        attachment_required.blob = Binary(b"\xe6\x00\xc4\xff\x07")
        attachment_required.validate()

        _5_BYTES = b"\xe6\x00\xc4\xff\x07"
        _4_BYTES = b"\xe6\x00\xc4\xff"
        with pytest.raises(ValidationError):
            AttachmentSizeLimit(blob=_5_BYTES).validate()
        AttachmentSizeLimit(blob=_4_BYTES).validate()

    def test_validation_fails(self):
        """Ensure that invalid values cannot be assigned to binary fields."""

        class Attachment(Document):
            blob = BinaryField()

        for invalid_data in (2, "Im_a_unicode", ["some_str"]):
            with pytest.raises(ValidationError):
                Attachment(blob=invalid_data).validate()

    def test__primary(self):
        class Attachment(Document):
            id = BinaryField(primary_key=True)

        Attachment.drop_collection()
        binary_id = uuid.uuid4().bytes
        att = Attachment(id=binary_id).save()
        assert 1 == Attachment.objects.count()
        assert 1 == Attachment.objects.filter(id=att.id).count()
        att.delete()
        assert 0 == Attachment.objects.count()

    def test_primary_filter_by_binary_pk_as_str(self):
        class Attachment(Document):
            id = BinaryField(primary_key=True)

        Attachment.drop_collection()
        binary_id = uuid.uuid4().bytes
        att = Attachment(id=binary_id).save()
        assert 1 == Attachment.objects.filter(id=binary_id).count()
        att.delete()
        assert 0 == Attachment.objects.count()

    def test_match_querying_with_bytes(self):
        class MyDocument(Document):
            bin_field = BinaryField()

        MyDocument.drop_collection()

        doc = MyDocument(bin_field=BIN_VALUE).save()
        matched_doc = MyDocument.objects(bin_field=BIN_VALUE).first()
        assert matched_doc.id == doc.id

    def test_match_querying_with_binary(self):
        class MyDocument(Document):
            bin_field = BinaryField()

        MyDocument.drop_collection()

        doc = MyDocument(bin_field=BIN_VALUE).save()

        matched_doc = MyDocument.objects(bin_field=Binary(BIN_VALUE)).first()
        assert matched_doc.id == doc.id

    def test_modify_operation__set(self):
        """Ensures no regression of bug #1127"""

        class MyDocument(Document):
            some_field = StringField()
            bin_field = BinaryField()

        MyDocument.drop_collection()

        doc = MyDocument.objects(some_field="test").modify(
            upsert=True, new=True, set__bin_field=BIN_VALUE
        )
        assert doc.some_field == "test"
        assert doc.bin_field == BIN_VALUE

    def test_update_one(self):
        """Ensures no regression of bug #1127"""

        class MyDocument(Document):
            bin_field = BinaryField()

        MyDocument.drop_collection()

        bin_data = b"\xe6\x00\xc4\xff\x07"
        doc = MyDocument(bin_field=bin_data).save()

        n_updated = MyDocument.objects(bin_field=bin_data).update_one(
            bin_field=BIN_VALUE
        )
        assert n_updated == 1
        fetched = MyDocument.objects.with_id(doc.id)
        assert fetched.bin_field == BIN_VALUE