import unittest
from onionrblocks.generators import anonvdf
import kasten
import mimcvdf

from time import time
from math import floor

class TestAnonVDF(unittest.TestCase):

    def test_vdf_create(self):
        test_data = kasten.generator.pack.pack(b"test", "tst", 0)
        test_vdf = mimcvdf.vdf_create(test_data, 1000, dec=True)

        generated = anonvdf.AnonVDFGenerator.generate(test_data, rounds=1000)
        self.assertEqual(
            generated.get_packed(),
            test_data
        )
        self.assertEqual(generated.id, int(test_vdf).to_bytes(64, byteorder="big"))

    def test_vdf_block_validate_ok_time(self):
        rds = 0
        test_data = kasten.generator.pack.pack(b"test", "tst")
        rds += len(test_data) * 90000
        test_id = mimcvdf.vdf_create(test_data, rds)
        anonvdf.AnonVDFGenerator.validate_id(test_id, test_data, rounds=rds)

    def test_vdf_block_validate_not_enough(self):

        rds = 133240
        t = floor(time()) - 60
        test_data = kasten.generator.pack.pack(b"test", "tst", app_metadata=None, timestamp=t)
        test_id = mimcvdf.vdf_create(test_data, rds)
        self.assertRaises(anonvdf.InvalidID, anonvdf.AnonVDFGenerator.validate_id, test_id, test_data, rounds=rds-1)

    def test_vdf_incermental(self):
        last = 1
        for i in range(1, 5):
            t = time()
            rds = 0
            test_data = kasten.generator.pack.pack(b"test" * i, "tst", 0)
            rds += len(test_data) * 90000
            test_id = mimcvdf.vdf_create(test_data, rds)
            anonvdf.AnonVDFGenerator.validate_id(test_id, test_data, rounds=rds)
            newT = time()
            self.assertGreater(newT - t, last)

    def test_block_embedded_vdf_rounds(self):

        t = floor(time())
        test_data = kasten.generator.pack.pack(b"test", "tst", app_metadata={"rds": 900000}, timestamp=t)
        rds = (3600 * 26) + (len(test_data) * 1000) - 1000
        test_data = kasten.generator.pack.pack(b"test", "tst", app_metadata={"rds": rds}, timestamp=t)
        test_vdf = anonvdf.AnonVDFGenerator.generate(test_data, None)
        anonvdf.AnonVDFGenerator.validate_id(test_vdf.id, test_data, rounds=None)

    def test_block_embedded_vdf_rounds_invalid(self):
        t = floor(time())
        test_data = kasten.generator.pack.pack(b"test", "tst", app_metadata={"rds": 900000}, timestamp=t)
        rds = (3600 * 26) + (len(test_data) * 1000) - 2000

        test_data = kasten.generator.pack.pack(b"test", "tst", app_metadata={"rds": rds}, timestamp=t)
        test_vdf = anonvdf.AnonVDFGenerator.generate(test_data)

        self.assertRaises(
            anonvdf.InvalidID,
            anonvdf.AnonVDFGenerator.validate_id, test_vdf.id, test_data, rounds=50000)

    def test_vdf_rounds_seconds(self):
        size = 10000
        per_byte = 1000
        per_second = 26
        expected_rounds = (3600 * per_second) + (size * per_byte)
        self.assertEqual(anonvdf.AnonVDFGenerator.get_rounds_for_ttl_seconds(3600, size), expected_rounds)

unittest.main()