from decimal import Decimal
import sys
import unittest

from monero.numbers import to_atomic, from_atomic, as_monero, PaymentID


class NumbersTestCase(unittest.TestCase):
    def test_simple_numbers(self):
        self.assertEqual(to_atomic(Decimal("0")), 0)
        self.assertEqual(from_atomic(0), Decimal("0"))
        self.assertEqual(to_atomic(Decimal("1")), 1000000000000)
        self.assertEqual(from_atomic(1000000000000), Decimal("1"))
        self.assertEqual(to_atomic(Decimal("0.000000000001")), 1)
        self.assertEqual(from_atomic(1), Decimal("0.000000000001"))

    def test_numeric_types(self):
        "Only check if conversion of given type succeeds or fails."
        self.assertTrue(to_atomic(1))
        self.assertTrue(to_atomic(1.0))
        if hasattr(sys, "maxint"):  # Python 2.x
            self.assertTrue(to_atomic(sys.maxint + 1))
        self.assertRaises(ValueError, to_atomic, "1")

    def test_rounding(self):
        self.assertEqual(to_atomic(Decimal("1.0000000000004")), 1000000000000)
        self.assertEqual(
            as_monero(Decimal("1.0000000000014")), Decimal("1.000000000001")
        )

    def test_payment_id(self):
        pid = PaymentID("0")
        self.assertTrue(pid.is_short())
        self.assertEqual(pid, 0)
        self.assertEqual(pid, "0000000000000000")
        self.assertEqual(PaymentID(pid), pid)
        self.assertNotEqual(pid, None)
        pid = PaymentID("abcdef")
        self.assertTrue(pid.is_short())
        self.assertEqual(pid, 0xABCDEF)
        self.assertEqual(pid, "0000000000abcdef")
        self.assertEqual(PaymentID(pid), pid)
        pid = PaymentID("1234567812345678")
        self.assertTrue(pid.is_short())
        self.assertEqual(pid, 0x1234567812345678)
        self.assertEqual(pid, "1234567812345678")
        self.assertEqual(PaymentID(pid), pid)
        pid = PaymentID("a1234567812345678")
        self.assertFalse(pid.is_short())
        self.assertEqual(pid, 0xA1234567812345678)
        self.assertEqual(
            pid, "00000000000000000000000000000000000000000000000a1234567812345678"
        )
        self.assertEqual(PaymentID(pid), pid)
        self.assertRaises(ValueError, PaymentID, 2 ** 256 + 1)