import pytest


@pytest.fixture
def client():
    from bigchaindb.client import temp_client
    return temp_client()


@pytest.fixture
def mock_requests_post(monkeypatch):
    class MockResponse:
        def __init__(self, json):
            self._json = json

        def json(self):
            return self._json

    def mockreturn(*args, **kwargs):
        return MockResponse(kwargs.get('json'))

    monkeypatch.setattr('requests.post', mockreturn)

@pytest.fixture
def mock_bigchaindb_sign(monkeypatch):
    def mockreturn(transaction, private_key):
        return transaction

    monkeypatch.setattr('bigchaindb.util.sign_tx', mockreturn)


def test_temp_client_returns_a_temp_client():
    from bigchaindb.client import temp_client
    client = temp_client()
    assert client.public_key
    assert client.private_key


@pytest.mark.usefixtures('restore_config')
def test_client_can_create_assets(mock_requests_post, client):
    from bigchaindb import util

    tx = client.create()

    # XXX: `CREATE` operations require the node that receives the transaction to modify the data in
    #      the transaction itself.
    #      `current_owner` will be overwritten with the public key of the node in the federation
    #      that will create the real transaction. `signature` will be overwritten with the new signature.
    #      Note that this scenario is ignored by this test.
    assert tx['transaction']['fulfillments'][0]['current_owners'][0] == client.public_key
    assert tx['transaction']['conditions'][0]['new_owners'][0] == client.public_key
    assert tx['transaction']['fulfillments'][0]['input'] is None

    assert util.validate_fulfillments(tx)


def test_client_can_transfer_assets(mock_requests_post, mock_bigchaindb_sign, client):
    from bigchaindb import util

    tx = client.transfer(client.public_key, 123)

    assert tx['transaction']['fulfillments'][0]['current_owners'][0] == client.public_key
    assert tx['transaction']['conditions'][0]['new_owners'][0] == client.public_key
    assert tx['transaction']['fulfillments'][0]['input'] == 123