package aes

import (
	"testing"
)

// See const.go for overview of math here.

// Test that powx is initialized correctly.
// (Can adapt this code to generate it too.)
func TestPowx(t *testing.T) {
	p := 1
	for i := 0; i < len(powx); i++ {
		if powx[i] != byte(p) {
			t.Errorf("powx[%d] = %#x, want %#x", i, powx[i], p)
		}
		p <<= 1
		if p&0x100 != 0 {
			p ^= poly
		}
	}
}

// Reducing mod poly corresponds to binary xor with poly every
// time a 0x100 bit appears.
const poly = 1<<8 | 1<<4 | 1<<3 | 1<<1 | 1<<0 // x⁸ + x⁴ + x³ + x + 1

// Powers of x mod poly in GF(2).
var powx = [16]byte{
	0x01,
	0x02,
	0x04,
	0x08,
	0x10,
	0x20,
	0x40,
	0x80,
	0x1b,
	0x36,
	0x6c,
	0xd8,
	0xab,
	0x4d,
	0x9a,
	0x2f,
}

//      Pow(±0, y) = ±0 for y an odd integer > 0
//      Pow(±0, y) = +0 for finite y > 0 and not an odd integer
//      Pow(-1, ±Inf) = 1
//      Pow(x, +Inf) = +Inf for |x| > 1
//      Pow(x, -Inf) = +0 for |x| > 1
//      Pow(x, +Inf) = +0 for |x| < 1
//      Pow(x, -Inf) = +Inf for |x| < 1
//      Pow(+Inf, y) = +Inf for y > 0
//      Pow(+Inf, y) = +0 for y < 0
//      Pow(-Inf, y) = Pow(-0, -y)

        .roundUnnecessaryShouldThrow()
        .test();
  }

  public void testRoundToDouble_negativeTwoToThe54MinusOne() {
    new RoundToDoubleTester(BigDecimal.valueOf((-1L << 54) - 1))
        .setExpectation(-Math.pow(2, 54), DOWN, CEILING, HALF_DOWN, HALF_UP, HALF_EVEN)
        .setExpectation(DoubleUtils.nextDown(-Math.pow(2, 54)), FLOOR, UP)

      BigInteger x2 = x.pow(2);
      // x^2 < 10^(2 * result + 1), or else we would have rounded up
      assertTrue(TEN.pow(2 * result + 1).compareTo(x2) > 0);
      // x^2 >= 10^(2 * result - 1), or else we would have rounded down
      assertTrue(result == 0 || TEN.pow(2 * result - 1).compareTo(x2) <= 0);
    }
  }

  @GwtIncompatible // TODO
  public void testLog10HalfDown() {

      if (d >= 1.0) {
        assertTrue(log2 >= 0);
        assertTrue(StrictMath.pow(2.0, log2) <= d);
        assertTrue(StrictMath.pow(2.0, log2 + 1) > d);
      } else {
        assertTrue(log2 <= 0);
        assertTrue(StrictMath.pow(2.0, log2) >= d);
        assertTrue(StrictMath.pow(2.0, log2 - 1) < d);
      }
    }
  }

      }
    }
  }

  @GwtIncompatible // 2147483646^2 expected=4
  public void testPow() {
    for (int i : ALL_INTEGER_CANDIDATES) {
      for (int pow : EXPONENTS) {
        assertEquals(i + "^" + pow, BigInteger.valueOf(i).pow(pow).intValue(), IntMath.pow(i, pow));
      }
    }
  }

  @AndroidIncompatible // slow
  public void testDivNonZero() {
    for (int p : NONZERO_INTEGER_CANDIDATES) {

		}
		if want, got := int8(i)%int8(pow2[2]) == 0, divisible_int8_2to2(int8(i)); got != want {
			t.Errorf("divisible_int8_2to2(%d) = %v want %v", i, got, want)
		}
		if want, got := int8(i)%int8(pow2[3]) == 0, divisible_int8_2to3(int8(i)); got != want {
			t.Errorf("divisible_int8_2to3(%d) = %v want %v", i, got, want)
		}
		if want, got := int8(i)%int8(pow2[4]) == 0, divisible_int8_2to4(int8(i)); got != want {

      case HALF_DOWN:
      case HALF_UP:
      case HALF_EVEN:
        // Since sqrt(10) is irrational, log10(x) - floorLog can never be exactly 0.5
        BigInteger x2 = x.pow(2);
        BigInteger halfPowerSquared = floorPow.pow(2).multiply(BigInteger.TEN);
        return (x2.compareTo(halfPowerSquared) <= 0) ? floorLog : floorLog + 1;
      default:
        throw new AssertionError();
    }
  }

	}
	klog.Infof("Portworx Volume %s setup at %s", b.volumeID, dir)
	return nil
}

func (pwx *portworxVolume) GetPath() string {
	return getPath(pwx.podUID, pwx.volName, pwx.plugin.host)
}

type portworxVolumeUnmounter struct {
	*portworxVolume
}

var _ volume.Unmounter = &portworxVolumeUnmounter{}