#include "components/misc/endianness.hpp"
#include <gtest/gtest.h>

struct EndiannessTest : public ::testing::Test
{
};

TEST_F(EndiannessTest, test_swap_endianness_inplace1)
{
    uint8_t zero = 0x00;
    uint8_t ff = 0xFF;
    uint8_t fortytwo = 0x42;
    uint8_t half = 128;

    Misc::swapEndiannessInplace(zero);
    EXPECT_EQ(zero, 0x00);

    Misc::swapEndiannessInplace(ff);
    EXPECT_EQ(ff, 0xFF);

    Misc::swapEndiannessInplace(fortytwo);
    EXPECT_EQ(fortytwo, 0x42);

    Misc::swapEndiannessInplace(half);
    EXPECT_EQ(half, 128);
}

TEST_F(EndiannessTest, test_swap_endianness_inplace2)
{
    uint16_t zero = 0x0000;
    uint16_t ffff = 0xFFFF;
    uint16_t n12 = 0x0102;
    uint16_t fortytwo = 0x0042;

    Misc::swapEndiannessInplace(zero);
    EXPECT_EQ(zero, 0x0000u);
    Misc::swapEndiannessInplace(zero);
    EXPECT_EQ(zero, 0x0000u);

    Misc::swapEndiannessInplace(ffff);
    EXPECT_EQ(ffff, 0xFFFFu);
    Misc::swapEndiannessInplace(ffff);
    EXPECT_EQ(ffff, 0xFFFFu);

    Misc::swapEndiannessInplace(n12);
    EXPECT_EQ(n12, 0x0201u);
    Misc::swapEndiannessInplace(n12);
    EXPECT_EQ(n12, 0x0102u);

    Misc::swapEndiannessInplace(fortytwo);
    EXPECT_EQ(fortytwo, 0x4200u);
    Misc::swapEndiannessInplace(fortytwo);
    EXPECT_EQ(fortytwo, 0x0042u);
}

TEST_F(EndiannessTest, test_swap_endianness_inplace4)
{
    uint32_t zero = 0x00000000;
    uint32_t n1234 = 0x01020304;
    uint32_t ffff = 0xFFFFFFFF;

    Misc::swapEndiannessInplace(zero);
    EXPECT_EQ(zero, 0x00000000u);
    Misc::swapEndiannessInplace(zero);
    EXPECT_EQ(zero, 0x00000000u);

    Misc::swapEndiannessInplace(n1234);
    EXPECT_EQ(n1234, 0x04030201u);
    Misc::swapEndiannessInplace(n1234);
    EXPECT_EQ(n1234, 0x01020304u);

    Misc::swapEndiannessInplace(ffff);
    EXPECT_EQ(ffff, 0xFFFFFFFFu);
    Misc::swapEndiannessInplace(ffff);
    EXPECT_EQ(ffff, 0xFFFFFFFFu);
}

TEST_F(EndiannessTest, test_swap_endianness_inplace8)
{
    uint64_t zero = 0x0000'0000'0000'0000;
    uint64_t n1234 = 0x0102'0304'0506'0708;
    uint64_t ffff = 0xFFFF'FFFF'FFFF'FFFF;

    Misc::swapEndiannessInplace(zero);
    EXPECT_EQ(zero, 0x0000'0000'0000'0000u);
    Misc::swapEndiannessInplace(zero);
    EXPECT_EQ(zero, 0x0000'0000'0000'0000u);

    Misc::swapEndiannessInplace(ffff);
    EXPECT_EQ(ffff, 0xFFFF'FFFF'FFFF'FFFFu);
    Misc::swapEndiannessInplace(ffff);
    EXPECT_EQ(ffff, 0xFFFF'FFFF'FFFF'FFFFu);

    Misc::swapEndiannessInplace(n1234);
    EXPECT_EQ(n1234, 0x0807'0605'0403'0201u);
    Misc::swapEndiannessInplace(n1234);
    EXPECT_EQ(n1234, 0x0102'0304'0506'0708u);
}

TEST_F(EndiannessTest, test_swap_endianness_inplace_float)
{
    const uint32_t original = 0x4023d70a;
    const uint32_t expected = 0x0ad72340;

    float number;
    memcpy(&number, &original, sizeof(original));

    Misc::swapEndiannessInplace(number);

    EXPECT_TRUE(!memcmp(&number, &expected, sizeof(expected)));
}

TEST_F(EndiannessTest, test_swap_endianness_inplace_double)
{
    const uint64_t original = 0x040047ae147ae147ul;
    const uint64_t expected = 0x47e17a14ae470004ul;

    double number;
    memcpy(&number, &original, sizeof(original));

    Misc::swapEndiannessInplace(number);

    EXPECT_TRUE(!memcmp(&number, &expected, sizeof(expected)));
}
