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/*
  This code tests the utils for selecting lattice parameters.
  unit tests for the utility to to find security parameters using the HomomorphicEncryption.org HE standard
 */

#include "gtest/gtest.h"
#include "lattice/lat-hal.h"
#include "lattice/stdlatticeparms.h"
#include "utils/inttypes.h"

#include <iostream>

using namespace lbcrypto;

class UTLatticeParams : public ::testing::Test {
protected:
    virtual void SetUp() {
        OpenFHEParallelControls.UnitTestStart();
    }

    virtual void TearDown() {
        OpenFHEParallelControls.UnitTestStop();
    }
};

// tests the edge cases when log q is right near the point where the ring dimension
// needs to be doubled to be compliant with the HE security standard
TEST_F(UTLatticeParams, edge_cases) {
    uint32_t maxQ    = StdLatticeParm::FindMaxQ(HEStd_ternary, HEStd_128_classic, 4096);
    uint32_t ringDim = StdLatticeParm::FindRingDim(HEStd_ternary, HEStd_128_classic, maxQ);
    EXPECT_EQ(ringDim, (uint32_t)4096) << "Ring dimension is incorrect for an edge case of curQ = maxQ";
    ringDim = StdLatticeParm::FindRingDim(HEStd_ternary, HEStd_128_classic, maxQ - 1);
    EXPECT_EQ(ringDim, (uint32_t)4096) << "Ring dimension is incorrect for an edge case of curQ = maxQ - 1";
    ringDim = StdLatticeParm::FindRingDim(HEStd_ternary, HEStd_128_classic, maxQ + 1);
    EXPECT_EQ(ringDim, (uint32_t)8192) << "Ring dimension is incorrect for an edge case of curQ = maxQ + 1";
}
