/*
 *  Copyright (c) 2016, The OpenThread Authors.
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the copyright holder nor the
 *     names of its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @file
 *  This file includes definitions for the Joiner role.
 */

#ifndef JOINER_HPP_
#define JOINER_HPP_

#include <openthread/joiner.h>

#include "coap/coap.hpp"
#include "coap/coap_header.hpp"
#include "coap/coap_secure.hpp"
#include "common/crc16.hpp"
#include "common/locator.hpp"
#include "common/message.hpp"
#include "meshcop/dtls.hpp"
#include "meshcop/meshcop_tlvs.hpp"
#include "net/udp6.hpp"

namespace ot {

class ThreadNetif;

namespace MeshCoP {

class Joiner: public ThreadNetifLocator
{
public:
    /**
     * This constructor initializes the Joiner object.
     *
     * @param[in]  aThreadNetif  A reference to the Thread network interface.
     *
     */
    Joiner(ThreadNetif &aThreadNetif);

    /**
     * This method starts the Joiner service.
     *
     * @param[in]  aPSKd             A pointer to the PSKd.
     * @param[in]  aProvisioningUrl  A pointer to the Provisioning URL (may be NULL).
     * @param[in]  aVendorName       A pointer to the Vendor Name (must be static).
     * @param[in]  aVendorModel      A pointer to the Vendor Model (must be static).
     * @param[in]  aVendorSwVersion  A pointer to the Vendor SW Version (must be static).
     * @param[in]  aVendorData       A pointer to the Vendor Data (must be static).
     * @param[in]  aCallback         A pointer to a function that is called when the join operation completes.
     * @param[in]  aContext          A pointer to application-specific context.
     *
     * @retval OT_ERROR_NONE  Successfully started the Joiner service.
     *
     */
    otError Start(const char *aPSKd, const char *aProvisioningUrl,
                  const char *aVendorName, const char *aVendorModel,
                  const char *aVendorSwVersion, const char *aVendorData,
                  otJoinerCallback aCallback, void *aContext);

    /**
     * This method stops the Joiner service.
     *
     * @retval OT_ERROR_NONE  Successfully stopped the Joiner service.
     *
     */
    otError Stop(void);

private:
    enum
    {
        kConfigExtAddressDelay = 100,  ///< milliseconds
        kTimeout               = 4000, ///< milliseconds
    };

    static void HandleDiscoverResult(otActiveScanResult *aResult, void *aContext);
    void HandleDiscoverResult(otActiveScanResult *aResult);

    static void HandleTimer(Timer &aTimer);
    void HandleTimer(void);

    void Close(void);
    void Complete(otError aError);

    static void HandleSecureCoapClientConnect(bool aConnected, void *aContext);
    void HandleSecureCoapClientConnect(bool aConnected);

    void SendJoinerFinalize(void);
    static void HandleJoinerFinalizeResponse(void *aContext, otCoapHeader *aHeader, otMessage *aMessage,
                                             const otMessageInfo *aMessageInfo, otError aResult);
    void HandleJoinerFinalizeResponse(Coap::Header *aHeader, Message *aMessage,
                                      const Ip6::MessageInfo *aMessageInfo, otError aResult);

    static void HandleJoinerEntrust(void *aContext, otCoapHeader *aHeader, otMessage *aMessage,
                                    const otMessageInfo *aMessageInfo);
    void HandleJoinerEntrust(Coap::Header &aHeader, Message &aMessage, const Ip6::MessageInfo &aMessageInfo);
    void SendJoinerEntrustResponse(const Coap::Header &aRequestHeader, const Ip6::MessageInfo &aRequestInfo);

    static Joiner &GetOwner(const Context &aContext);

    enum State
    {
        kStateIdle      = 0,
        kStateDiscover  = 1,
        kStateConnect   = 2,
        kStateConnected = 3,
        kStateEntrust   = 4,
        kStateJoined    = 5,
    };
    State mState;

    otJoinerCallback mCallback;
    void *mContext;

    uint16_t mCcitt;
    uint16_t mAnsi;

    uint8_t mJoinerRouterChannel;
    uint16_t mJoinerRouterPanId;
    uint16_t mJoinerUdpPort;
    Mac::ExtAddress mJoinerRouter;

    const char *mVendorName;
    const char *mVendorModel;
    const char *mVendorSwVersion;
    const char *mVendorData;

    Timer mTimer;
    Coap::Resource mJoinerEntrust;
};

}  // namespace MeshCoP
}  // namespace ot

#endif  // JOINER_HPP_