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"""Tests for Odb objects."""

# Standard Library
import binascii
import gc
import os

import pytest

# pygit2
from pygit2 import Odb, Oid
from pygit2 import GIT_OBJ_ANY, GIT_OBJ_BLOB
from . import utils


BLOB_HEX = 'af431f20fc541ed6d5afede3e2dc7160f6f01f16'
BLOB_RAW = binascii.unhexlify(BLOB_HEX.encode('ascii'))
BLOB_OID = Oid(raw=BLOB_RAW)


def test_emptyodb():
    odb = Odb()

    assert len([str(o) for o in odb]) == 0
    assert BLOB_HEX not in odb
    path = os.path.join(os.path.dirname(__file__), 'data', 'testrepo.git', 'objects')
    odb.add_disk_alternate(path)
    assert BLOB_HEX in odb


@pytest.fixture
def odb(barerepo):
    odb = barerepo.odb
    yield odb
    del odb
    gc.collect()

def test_iterable(odb):
    assert BLOB_HEX in [str(o) for o in odb]

def test_contains(odb):
    assert BLOB_HEX in odb

def test_read(odb):
    with pytest.raises(TypeError):
        odb.read(123)
    utils.assertRaisesWithArg(KeyError, '1' * 40, odb.read, '1' * 40)

    ab = odb.read(BLOB_OID)
    a = odb.read(BLOB_HEX)
    assert ab == a
    assert (GIT_OBJ_BLOB, b'a contents\n') == a

    a2 = odb.read('7f129fd57e31e935c6d60a0c794efe4e6927664b')
    assert (GIT_OBJ_BLOB, b'a contents 2\n') == a2

    a_hex_prefix = BLOB_HEX[:4]
    a3 = odb.read(a_hex_prefix)
    assert (GIT_OBJ_BLOB, b'a contents\n') == a3

def test_write(odb):
    data = b"hello world"
    # invalid object type
    with pytest.raises(ValueError):
        odb.write(GIT_OBJ_ANY, data)

    oid = odb.write(GIT_OBJ_BLOB, data)
    assert type(oid) == Oid
