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 */

#include <stdarg.h>
#include <stdio.h>
#include <string.h>

#include "platform/nexus_core.hpp"
#include "platform/nexus_node.hpp"

namespace ot {
namespace Nexus {

void VerifyChannel(Core &aNexus, uint16_t aChannel)
{
    for (Node &node : aNexus.GetNodes())
    {
        MeshCoP::Dataset::Info datasetInfo;
        SuccessOrQuit(node.Get<MeshCoP::ActiveDatasetManager>().Read(datasetInfo));

        VerifyOrQuit(datasetInfo.IsPresent<MeshCoP::Dataset::kChannel>());
        VerifyOrQuit(datasetInfo.Get<MeshCoP::Dataset::kChannel>() == aChannel);
        VerifyOrQuit(node.Get<Mac::Mac>().GetPanChannel() == aChannel);
    }
}

void TestDatasetUpdater(void)
{
    Core nexus;

    Node &leader = nexus.CreateNode();
    Node &router = nexus.CreateNode();
    Node &med    = nexus.CreateNode();
    Node &sed    = nexus.CreateNode();

    leader.SetName("leader");
    router.SetName("router");
    med.SetName("med");
    sed.SetName("sed");

    nexus.AdvanceTime(0);

    SuccessOrQuit(Instance::SetGlobalLogLevel(kLogLevelInfo));

    Log("---------------------------------------------------------------------------------------");
    Log("Form network on channel 11");

    leader.Form();
    {
        MeshCoP::Dataset::Info datasetInfo;
        SuccessOrQuit(leader.Get<MeshCoP::ActiveDatasetManager>().Read(datasetInfo));
        datasetInfo.Set<MeshCoP::Dataset::kChannel>(11);
        leader.Get<MeshCoP::ActiveDatasetManager>().SaveLocal(datasetInfo);
    }

    nexus.AdvanceTime(13 * 1000);
    VerifyOrQuit(leader.Get<Mle::Mle>().IsLeader());

    router.Join(leader);
    med.Join(router, Node::kAsMed);
    sed.Join(router, Node::kAsSed);

    // Set a faster poll period for SED to ensure it receives Dataset updates promptly
    SuccessOrQuit(sed.Get<DataPollSender>().SetExternalPollPeriod(100));

    nexus.AdvanceTime(300 * 1000);

    VerifyOrQuit(leader.Get<Mle::Mle>().IsLeader());
    VerifyOrQuit(router.Get<Mle::Mle>().IsRouter());
    VerifyOrQuit(med.Get<Mle::Mle>().IsChild());
    VerifyOrQuit(sed.Get<Mle::Mle>().IsChild());

    VerifyChannel(nexus, 11);

    Log("---------------------------------------------------------------------------------------");
    Log("Update initiated by LEADER to channel 12");

    {
        MeshCoP::Dataset::Info datasetInfo;
        datasetInfo.Clear();
        datasetInfo.Set<MeshCoP::Dataset::kChannel>(12);
        SuccessOrQuit(leader.Get<MeshCoP::DatasetUpdater>().RequestUpdate(datasetInfo, nullptr, nullptr));
    }

    nexus.AdvanceTime(200 * 1000);
    VerifyChannel(nexus, 12);

    Log("---------------------------------------------------------------------------------------");
    Log("Update initiated by ROUTER to channel 13");

    {
        MeshCoP::Dataset::Info datasetInfo;
        datasetInfo.Clear();
        datasetInfo.Set<MeshCoP::Dataset::kChannel>(13);
        SuccessOrQuit(router.Get<MeshCoP::DatasetUpdater>().RequestUpdate(datasetInfo, nullptr, nullptr));
    }

    nexus.AdvanceTime(200 * 1000);
    VerifyChannel(nexus, 13);

    Log("---------------------------------------------------------------------------------------");
    Log("Update initiated by LEADER overridden by ROUTER (14 -> 15)");

    {
        MeshCoP::Dataset::Info datasetInfo;
        datasetInfo.Clear();
        datasetInfo.Set<MeshCoP::Dataset::kChannel>(14);
        SuccessOrQuit(leader.Get<MeshCoP::DatasetUpdater>().RequestUpdate(datasetInfo, nullptr, nullptr));
    }
    nexus.AdvanceTime(20 * 1000);
    {
        MeshCoP::Dataset::Info datasetInfo;
        datasetInfo.Clear();
        datasetInfo.Set<MeshCoP::Dataset::kChannel>(15);
        SuccessOrQuit(router.Get<MeshCoP::DatasetUpdater>().RequestUpdate(datasetInfo, nullptr, nullptr));
    }

    nexus.AdvanceTime(200 * 1000);
    VerifyChannel(nexus, 15);

    Log("---------------------------------------------------------------------------------------");
    Log("Update initiated by ROUTER overridden by LEADER (16 -> 17)");

    {
        MeshCoP::Dataset::Info datasetInfo;
        datasetInfo.Clear();
        datasetInfo.Set<MeshCoP::Dataset::kChannel>(16);
        SuccessOrQuit(router.Get<MeshCoP::DatasetUpdater>().RequestUpdate(datasetInfo, nullptr, nullptr));
    }
    nexus.AdvanceTime(10 * 1000);
    {
        MeshCoP::Dataset::Info datasetInfo;
        datasetInfo.Clear();
        datasetInfo.Set<MeshCoP::Dataset::kChannel>(17);
        SuccessOrQuit(leader.Get<MeshCoP::DatasetUpdater>().RequestUpdate(datasetInfo, nullptr, nullptr));
    }

    nexus.AdvanceTime(200 * 1000);
    VerifyChannel(nexus, 17);
}

} // namespace Nexus
} // namespace ot

int main(void)
{
    ot::Nexus::TestDatasetUpdater();
    printf("All tests passed\n");
    return 0;
}