# Copyright © 2020 Interplanetary Database Association e.V.,
# BigchainDB and IPDB software contributors.
# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
# Code is Apache-2.0 and docs are CC-BY-4.0

# # Double Spend testing
# This test challenge the system with double spends.

import os
from uuid import uuid4
from threading import Thread
import queue

import bigchaindb_driver.exceptions
from bigchaindb_driver import BigchainDB
from bigchaindb_driver.crypto import generate_keypair


def test_double_create():
    bdb = BigchainDB(os.environ.get('BIGCHAINDB_ENDPOINT'))
    alice = generate_keypair()

    results = queue.Queue()

    tx = bdb.transactions.fulfill(
            bdb.transactions.prepare(
                operation='CREATE',
                signers=alice.public_key,
                asset={'data': {'uuid': str(uuid4())}}),
            private_keys=alice.private_key)

    def send_and_queue(tx):
        try:
            bdb.transactions.send_commit(tx)
            results.put('OK')
        except bigchaindb_driver.exceptions.TransportError as e:
            results.put('FAIL')

    t1 = Thread(target=send_and_queue, args=(tx, ))
    t2 = Thread(target=send_and_queue, args=(tx, ))

    t1.start()
    t2.start()

    results = [results.get(timeout=2), results.get(timeout=2)]

    assert results.count('OK') == 1
    assert results.count('FAIL') == 1