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 *     derived from this software without specific prior written permission.
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 */

#include "test_platform.h"

#include <openthread/config.h>

#include "test_util.h"
#include "common/code_utils.hpp"
#include "common/num_utils.hpp"
#include "common/numeric_limits.hpp"
#include "common/serial_number.hpp"

namespace ot {

template <typename UintType> void TestSerialNumber(const char *aName)
{
    static constexpr UintType kMax = NumericLimits<UintType>::kMax;
    static constexpr UintType kMid = kMax / 2;

    static const UintType kNumbers[] = {0, 1, 20, kMid - 1, kMid, kMid + 1, kMax - 20, kMax - 1, kMax};

    for (UintType number : kNumbers)
    {
        VerifyOrQuit(!SerialNumber::IsGreater<UintType>(number, number));
        VerifyOrQuit(!SerialNumber::IsLess<UintType>(number, number));

        VerifyOrQuit(SerialNumber::IsGreater<UintType>(number + 1, number));
        VerifyOrQuit(SerialNumber::IsGreater<UintType>(number + kMid - 1, number));
        VerifyOrQuit(SerialNumber::IsGreater<UintType>(number + kMid, number));
        VerifyOrQuit(!SerialNumber::IsGreater<UintType>(number + kMid + 2, number));
        VerifyOrQuit(!SerialNumber::IsGreater<UintType>(number + kMax - 1, number));

        VerifyOrQuit(SerialNumber::IsLess<UintType>(number - 1, number));
        VerifyOrQuit(SerialNumber::IsLess<UintType>(number - kMid + 1, number));
        VerifyOrQuit(SerialNumber::IsLess<UintType>(number - kMid, number));
        VerifyOrQuit(!SerialNumber::IsLess<UintType>(number - kMid - 2, number));
        VerifyOrQuit(!SerialNumber::IsLess<UintType>(number - kMax + 1, number));
    }

    printf("TestSerialNumber<%s>() passed\n", aName);
}

void TestNumUtils(void)
{
    uint16_t u16;
    uint32_t u32;

    VerifyOrQuit(Min<uint8_t>(1, 2) == 1);
    VerifyOrQuit(Min<uint8_t>(2, 1) == 1);
    VerifyOrQuit(Min<uint8_t>(1, 1) == 1);

    VerifyOrQuit(Max<uint8_t>(1, 2) == 2);
    VerifyOrQuit(Max<uint8_t>(2, 1) == 2);
    VerifyOrQuit(Max<uint8_t>(1, 1) == 1);

    VerifyOrQuit(Clamp<uint8_t>(1, 5, 10) == 5);
    VerifyOrQuit(Clamp<uint8_t>(5, 5, 10) == 5);
    VerifyOrQuit(Clamp<uint8_t>(7, 5, 10) == 7);
    VerifyOrQuit(Clamp<uint8_t>(10, 5, 10) == 10);
    VerifyOrQuit(Clamp<uint8_t>(12, 5, 10) == 10);

    VerifyOrQuit(Clamp<uint8_t>(10, 10, 10) == 10);
    VerifyOrQuit(Clamp<uint8_t>(9, 10, 10) == 10);
    VerifyOrQuit(Clamp<uint8_t>(11, 10, 10) == 10);

    u16 = 100;
    VerifyOrQuit(ClampToUint8(u16) == 100);
    u16 = 255;
    VerifyOrQuit(ClampToUint8(u16) == 255);
    u16 = 256;
    VerifyOrQuit(ClampToUint8(u16) == 255);
    u16 = 400;
    VerifyOrQuit(ClampToUint8(u16) == 255);

    u32 = 100;
    VerifyOrQuit(ClampToUint16(u32) == 100);
    u32 = 256;
    VerifyOrQuit(ClampToUint16(u32) == 256);
    u32 = 0xffff;
    VerifyOrQuit(ClampToUint16(u32) == 0xffff);
    u32 = 0x10000;
    VerifyOrQuit(ClampToUint16(u32) == 0xffff);
    u32 = 0xfff0000;
    VerifyOrQuit(ClampToUint16(u32) == 0xffff);

    VerifyOrQuit(ThreeWayCompare<uint8_t>(2, 2) == 0);
    VerifyOrQuit(ThreeWayCompare<uint8_t>(2, 1) > 0);
    VerifyOrQuit(ThreeWayCompare<uint8_t>(1, 2) < 0);

    VerifyOrQuit(ThreeWayCompare<bool>(false, false) == 0);
    VerifyOrQuit(ThreeWayCompare<bool>(true, true) == 0);
    VerifyOrQuit(ThreeWayCompare<bool>(true, false) > 0);
    VerifyOrQuit(ThreeWayCompare<bool>(false, true) < 0);

    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(2, 1) == 2);
    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(1, 3) == 0);
    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(1, 2) == 1);
    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(2, 3) == 1);
    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(3, 2) == 2);
    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(4, 2) == 2);

    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(0, 10) == 0);
    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(4, 10) == 0);
    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(5, 10) == 1);
    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(9, 10) == 1);
    VerifyOrQuit(DivideAndRoundToClosest<uint8_t>(10, 10) == 1);

    printf("TestNumUtils() passed\n");
}

} // namespace ot

int main(void)
{
    ot::TestSerialNumber<uint8_t>("uint8_t");
    ot::TestSerialNumber<uint16_t>("uint16_t");
    ot::TestSerialNumber<uint32_t>("uint32_t");
    ot::TestSerialNumber<uint64_t>("uint64_t");
    ot::TestNumUtils();
    printf("\nAll tests passed.\n");
    return 0;
}