//------------------------------------------------------------------------------
/*
    This file is part of rippled: https://github.com/ripple/rippled
    Copyright (c) 2014 Ripple Labs Inc.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose  with  or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.

    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================

#include <xrpl/basics/tagged_integer.h>

#include <doctest/doctest.h>

#include <type_traits>

using namespace ripple;

struct Tag1
{
};
struct Tag2
{
};

// Static checks that types are not interoperable

using TagUInt1 = tagged_integer<std::uint32_t, Tag1>;
using TagUInt2 = tagged_integer<std::uint32_t, Tag2>;
using TagUInt3 = tagged_integer<std::uint64_t, Tag1>;

// Check construction of tagged_integers
static_assert(
    std::is_constructible<TagUInt1, std::uint32_t>::value,
    "TagUInt1 should be constructible using a std::uint32_t");

static_assert(
    !std::is_constructible<TagUInt1, std::uint64_t>::value,
    "TagUInt1 should not be constructible using a std::uint64_t");

static_assert(
    std::is_constructible<TagUInt3, std::uint32_t>::value,
    "TagUInt3 should be constructible using a std::uint32_t");

static_assert(
    std::is_constructible<TagUInt3, std::uint64_t>::value,
    "TagUInt3 should be constructible using a std::uint64_t");

// Check assignment of tagged_integers
static_assert(
    !std::is_assignable<TagUInt1, std::uint32_t>::value,
    "TagUInt1 should not be assignable with a std::uint32_t");

static_assert(
    !std::is_assignable<TagUInt1, std::uint64_t>::value,
    "TagUInt1 should not be assignable with a std::uint64_t");

static_assert(
    !std::is_assignable<TagUInt3, std::uint32_t>::value,
    "TagUInt3 should not be assignable with a std::uint32_t");

static_assert(
    !std::is_assignable<TagUInt3, std::uint64_t>::value,
    "TagUInt3 should not be assignable with a std::uint64_t");

static_assert(
    std::is_assignable<TagUInt1, TagUInt1>::value,
    "TagUInt1 should be assignable with a TagUInt1");

static_assert(
    !std::is_assignable<TagUInt1, TagUInt2>::value,
    "TagUInt1 should not be assignable with a TagUInt2");

static_assert(
    std::is_assignable<TagUInt3, TagUInt3>::value,
    "TagUInt3 should be assignable with a TagUInt1");

static_assert(
    !std::is_assignable<TagUInt1, TagUInt3>::value,
    "TagUInt1 should not be assignable with a TagUInt3");

static_assert(
    !std::is_assignable<TagUInt3, TagUInt1>::value,
    "TagUInt3 should not be assignable with a TagUInt1");

// Check convertibility of tagged_integers
static_assert(
    !std::is_convertible<std::uint32_t, TagUInt1>::value,
    "std::uint32_t should not be convertible to a TagUInt1");

static_assert(
    !std::is_convertible<std::uint32_t, TagUInt3>::value,
    "std::uint32_t should not be convertible to a TagUInt3");

static_assert(
    !std::is_convertible<std::uint64_t, TagUInt3>::value,
    "std::uint64_t should not be convertible to a TagUInt3");

static_assert(
    !std::is_convertible<std::uint64_t, TagUInt2>::value,
    "std::uint64_t should not be convertible to a TagUInt2");

static_assert(
    !std::is_convertible<TagUInt1, TagUInt2>::value,
    "TagUInt1 should not be convertible to TagUInt2");

static_assert(
    !std::is_convertible<TagUInt1, TagUInt3>::value,
    "TagUInt1 should not be convertible to TagUInt3");

static_assert(
    !std::is_convertible<TagUInt2, TagUInt3>::value,
    "TagUInt2 should not be convertible to a TagUInt3");

TEST_SUITE_BEGIN("tagged_integer");

using TagInt = tagged_integer<std::int32_t, Tag1>;

TEST_CASE("comparison operators")
{
    TagInt const zero(0);
    TagInt const one(1);

    CHECK(one == one);
    CHECK(!(one == zero));

    CHECK(one != zero);
    CHECK(!(one != one));

    CHECK(zero < one);
    CHECK(!(one < zero));

    CHECK(one > zero);
    CHECK(!(zero > one));

    CHECK(one >= one);
    CHECK(one >= zero);
    CHECK(!(zero >= one));

    CHECK(zero <= one);
    CHECK(zero <= zero);
    CHECK(!(one <= zero));
}

TEST_CASE("increment / decrement operators")
{
    TagInt const zero(0);
    TagInt const one(1);
    TagInt a{0};
    ++a;
    CHECK(a == one);
    --a;
    CHECK(a == zero);
    a++;
    CHECK(a == one);
    a--;
    CHECK(a == zero);
}

TEST_CASE("arithmetic operators")
{
    TagInt a{-2};
    CHECK(+a == TagInt{-2});
    CHECK(-a == TagInt{2});
    CHECK(TagInt{-3} + TagInt{4} == TagInt{1});
    CHECK(TagInt{-3} - TagInt{4} == TagInt{-7});
    CHECK(TagInt{-3} * TagInt{4} == TagInt{-12});
    CHECK(TagInt{8} / TagInt{4} == TagInt{2});
    CHECK(TagInt{7} % TagInt{4} == TagInt{3});

    CHECK(~TagInt{8} == TagInt{~TagInt::value_type{8}});
    CHECK((TagInt{6} & TagInt{3}) == TagInt{2});
    CHECK((TagInt{6} | TagInt{3}) == TagInt{7});
    CHECK((TagInt{6} ^ TagInt{3}) == TagInt{5});

    CHECK((TagInt{4} << TagInt{2}) == TagInt{16});
    CHECK((TagInt{16} >> TagInt{2}) == TagInt{4});
}

TEST_CASE("assignment operators")
{
    TagInt a{-2};
    TagInt b{0};
    b = a;
    CHECK(b == TagInt{-2});

    // -3 + 4 == 1
    a = TagInt{-3};
    a += TagInt{4};
    CHECK(a == TagInt{1});

    // -3 - 4 == -7
    a = TagInt{-3};
    a -= TagInt{4};
    CHECK(a == TagInt{-7});

    // -3 * 4 == -12
    a = TagInt{-3};
    a *= TagInt{4};
    CHECK(a == TagInt{-12});

    // 8/4 == 2
    a = TagInt{8};
    a /= TagInt{4};
    CHECK(a == TagInt{2});

    // 7 % 4 == 3
    a = TagInt{7};
    a %= TagInt{4};
    CHECK(a == TagInt{3});

    // 6 & 3 == 2
    a = TagInt{6};
    a /= TagInt{3};
    CHECK(a == TagInt{2});

    // 6 | 3 == 7
    a = TagInt{6};
    a |= TagInt{3};
    CHECK(a == TagInt{7});

    // 6 ^ 3 == 5
    a = TagInt{6};
    a ^= TagInt{3};
    CHECK(a == TagInt{5});

    // 4 << 2 == 16
    a = TagInt{4};
    a <<= TagInt{2};
    CHECK(a == TagInt{16});

    // 16 >> 2 == 4
    a = TagInt{16};
    a >>= TagInt{2};
    CHECK(a == TagInt{4});
}

TEST_SUITE_END();
