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

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

namespace ot {
namespace Nexus {

/**
 * Time to advance for a node to form a network and become leader.
 */
static constexpr uint32_t kFormNetworkTime = 13 * 1000;

/**
 * Time to advance for a node to join as a child and upgrade to a router.
 * This duration accounts for MLE attach process and ROUTER_SELECTION_JITTER.
 */
static constexpr uint32_t kAttachToRouterTime = 200 * 1000;

void Test5_1_6(void)
{
    /**
     * 5.1.6 Leader removes Router ID
     *
     * 5.1.6.1 Topology
     * - Leader
     * - Router_1 (DUT)
     *
     * 5.1.6.2 Purpose & Description
     * The purpose of this test case is to verify that when the Leader de-allocates a Router ID, the DUT, as a
     * router, re-attaches.
     *
     * Spec Reference                               | V1.1 Section | V1.3.0 Section
     * ---------------------------------------------|--------------|---------------
     * Router ID Management / Router ID Assignment  | 5.16.1       | 5.16.1
     */

    Core nexus;

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

    leader.SetName("LEADER");
    router.SetName("ROUTER");

    AllowLinkBetween(leader, router);

    nexus.AdvanceTime(0);

    SuccessOrQuit(Instance::SetGlobalLogLevel(kLogLevelInfo));

    Log("---------------------------------------------------------------------------------------");
    Log("Step 0: Verify topology is formed correctly");

    /**
     * Step 0: All
     * - Description: Verify topology is formed correctly
     * - Pass Criteria: N/A
     */
    leader.Form();
    nexus.AdvanceTime(kFormNetworkTime);
    VerifyOrQuit(leader.Get<Mle::Mle>().IsLeader());

    router.Join(leader);
    nexus.AdvanceTime(kAttachToRouterTime);
    VerifyOrQuit(router.Get<Mle::Mle>().IsRouter());

    Log("---------------------------------------------------------------------------------------");
    Log("Step 1: Harness instructs the Leader to send a ' helper ping' (ICMPv6 Echo Request) to the DUT");

    /**
     * Step 1: Leader
     * - Description: Harness instructs the Leader to send a ' helper ping' (ICMPv6 Echo Request) to the DUT
     * - Pass Criteria:
     *   - The DUT MUST respond with an ICMPv6 Echo Reply
     */
    nexus.SendAndVerifyEchoRequest(leader, router.Get<Mle::Mle>().GetLinkLocalAddress());

    Log("---------------------------------------------------------------------------------------");
    Log("Step 2: Harness instructs the Leader to remove the Router ID of Router_1 (the DUT)");

    /**
     * Step 2: Leader
     * - Description: Harness instructs the Leader to remove the Router ID of Router_1 (the DUT)
     * - Pass Criteria: N/A
     */
    uint8_t routerId = Mle::RouterIdFromRloc16(router.Get<Mle::Mle>().GetRloc16());
    SuccessOrQuit(leader.Get<RouterTable>().Release(routerId));

    Log("---------------------------------------------------------------------------------------");
    Log("Step 3: Automatically re-attaches once it recognizes its Router ID has been removed.");

    /**
     * Step 3: Router_1 (DUT)
     * - Description: Automatically re-attaches once it recognizes its Router ID has been removed.
     * - Pass Criteria:
     *   - The DUT MUST send a properly formatted MLE Parent Request, MLE Child ID Request, and Address Solicit
     *     Request messages to the Leader. (See 5.1.1 for formatting)
     */
    nexus.AdvanceTime(kAttachToRouterTime);
    VerifyOrQuit(router.Get<Mle::Mle>().IsRouter());

    Log("---------------------------------------------------------------------------------------");
    Log("Step 4: Harness verifies connectivity by instructing the Leader to send an ICMPv6 Echo Request to the DUT");

    /**
     * Step 4: Leader
     * - Description: Harness verifies connectivity by instructing the Leader to send an ICMPv6 Echo Request to
     *   the DUT
     * - Pass Criteria:
     *   - The DUT MUST respond with an ICMPv6 Echo Reply
     */
    nexus.SendAndVerifyEchoRequest(leader, router.Get<Mle::Mle>().GetLinkLocalAddress());

    nexus.SaveTestInfo("test_1_1_5_1_6.json");
}

} // namespace Nexus
} // namespace ot

int main(void)
{
    ot::Nexus::Test5_1_6();
    printf("All tests passed\n");
    return 0;
}
