// Copyright (c) 2014-2022 The Dash Core developers

#include <cachemultimap.h>

#include <test/util/setup_common.h>

#include <algorithm>
#include <iostream>

#include <boost/test/unit_test.hpp>

BOOST_FIXTURE_TEST_SUITE(cachemultimap_tests, BasicTestingSetup)

static bool Compare(const CacheMultiMap<int,int>& cmmap1, const CacheMultiMap<int,int>& cmmap2)
{
    if(cmmap1.GetMaxSize() != cmmap2.GetMaxSize()) {
        std::cout << "Compare returning false: max size mismatch" << std::endl;
        return false;
    }

    if(cmmap1.GetSize() != cmmap2.GetSize()) {
        std::cout << "Compare returning false: size mismatch" << std::endl;
        return false;
    }

    const CacheMultiMap<int,int>::list_t& items1 = cmmap1.GetItemList();
    const CacheMultiMap<int,int>::list_t& items2 = cmmap2.GetItemList();
    CacheMultiMap<int,int>::list_cit it2 = items2.begin();
    for(CacheMultiMap<int,int>::list_cit it1 = items1.begin(); it1 != items1.end(); ++it1) {
        const CacheItem<int,int>& item1 = *it1;
        const CacheItem<int,int>& item2 = *it2;
        if(item1.key != item2.key) {
            return false;
        }
        if(item1.value != item2.value) {
            return false;
        }
        ++it2;
    }

    return true;
}

static bool CheckExpected(const CacheMultiMap<int,int>& cmmap, int* expected, CacheMultiMap<int,int>::size_type nSize)
{
    if(cmmap.GetSize() != nSize) {
        return false;
    }
    for(CacheMultiMap<int,int>::size_type i = 0; i < nSize; ++i) {
        int nVal = 0;
        int eVal = expected[i];
        if(!cmmap.Get(eVal, nVal)) {
            return false;
        }
        if(nVal != eVal) {
            return false;
        }
    }
    return true;
}

BOOST_AUTO_TEST_CASE(cachemultimap_test)
{
    // create a CacheMultiMap limited to 10 items
    CacheMultiMap<int,int> cmmapTest1(10);

    // check that the max size is 10
    BOOST_CHECK(cmmapTest1.GetMaxSize() == 10);

    // check that the size is 0
    BOOST_CHECK(cmmapTest1.GetSize() == 0);

    // insert (-1, -1)
    cmmapTest1.Insert(-1, -1);

    // make sure that the size is updated
    BOOST_CHECK(cmmapTest1.GetSize() == 1);

    // make sure the map contains the key
    BOOST_CHECK(cmmapTest1.HasKey(-1) == true);

    // add 10 items
    for(int i = 0; i < 10; ++i) {
        cmmapTest1.Insert(i, i);
    }

    // check that the size is 10
    BOOST_CHECK(cmmapTest1.GetSize() == 10);

    // check that the map contains the expected items
    for(int i = 0; i < 10; ++i) {
        int nVal = 0;
        BOOST_CHECK(cmmapTest1.Get(i, nVal) == true);
        BOOST_CHECK(nVal == i);
    }

    // check that the map no longer contains the first item
    BOOST_CHECK(cmmapTest1.HasKey(-1) == false);

    // erase an item
    cmmapTest1.Erase(5);

    // check the size
    BOOST_CHECK(cmmapTest1.GetSize() == 9);

    // check that the map no longer contains the item
    BOOST_CHECK(cmmapTest1.HasKey(5) == false);

    // check that the map contains the expected items
    int expected[] = { 0, 1, 2, 3, 4, 6, 7, 8, 9 };
    BOOST_CHECK(CheckExpected(cmmapTest1, expected, 9 ) == true);

    // add multiple items for the same key
    cmmapTest1.Insert(5, 2);
    cmmapTest1.Insert(5, 1);
    cmmapTest1.Insert(5, 4);

    // check the size
    BOOST_CHECK(cmmapTest1.GetSize() == 10);

    // check that 2 keys have been removed
    BOOST_CHECK(cmmapTest1.HasKey(0) == false);
    BOOST_CHECK(cmmapTest1.HasKey(1) == false);
    BOOST_CHECK(cmmapTest1.HasKey(2) == true);

    // check multiple values
    std::vector<int> vecVals;
    BOOST_CHECK(cmmapTest1.GetAll(5, vecVals) == true);
    BOOST_CHECK(vecVals.size() == 3);
    BOOST_CHECK(vecVals[0] == 1);
    BOOST_CHECK(vecVals[1] == 2);
    BOOST_CHECK(vecVals[2] == 4);

//    std::cout << "cmmapTest1 dump:" << std::endl;
//    DumpMap(cmmapTest1);

    // test serialization
    CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
    ss << cmmapTest1;

    CacheMultiMap<int,int> cmmapTest2;
    ss >> cmmapTest2;

//    std::cout << "cmmapTest2 dump:" << std::endl;
//    DumpMap(cmmapTest2);

    // check multiple values
    std::vector<int> vecVals2;
    BOOST_CHECK(cmmapTest2.GetAll(5, vecVals2) == true);
    BOOST_CHECK(vecVals2.size() == 3);
    BOOST_CHECK(vecVals2[0] == 1);
    BOOST_CHECK(vecVals2[1] == 2);
    BOOST_CHECK(vecVals2[2] == 4);

    BOOST_CHECK(Compare(cmmapTest1, cmmapTest2));

    // test copy constructor
    CacheMultiMap<int,int> cmmapTest3(cmmapTest1);
    BOOST_CHECK(Compare(cmmapTest1, cmmapTest3));

    // test assignment operator
    CacheMultiMap<int,int> mapTest4;
    mapTest4 = cmmapTest1;
    BOOST_CHECK(Compare(cmmapTest1, mapTest4));
}

BOOST_AUTO_TEST_SUITE_END()