/******************************************************************************
 *
 *  Copyright (C) 2014 The Android Open Source Project
 *  Copyright (C) 2009-2012 Broadcom Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at:
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

/************************************************************************************
 *
 *  Filename:      btif_mce.c
 *
 *  Description:   Message Access Profile (MCE role) Bluetooth Interface
 *
 *
 ***********************************************************************************/

#define LOG_TAG "bt_btif_mce"

#include <stdlib.h>
#include <string.h>
#include "bt_target.h"
#if defined(BTA_MCE_INCLUDED) && (BTA_MCE_INCLUDED == TRUE)
#include <hardware/bluetooth.h>
#include <hardware/bt_mce.h>

#include "bt_types.h"
#include "bta_api.h"
#include "bta_mce_api.h"
#include "btcore/include/bdaddr.h"
#include "btif_common.h"
#include "btif_profile_queue.h"
#include "btif_util.h"

/*****************************************************************************
**  Static variables
******************************************************************************/

static btmce_callbacks_t *bt_mce_callbacks = NULL;

static void btif_mce_mas_discovery_comp_evt(uint16_t event, char *p_param)
{
    tBTA_MCE_MAS_DISCOVERY_COMP *evt_data = (tBTA_MCE_MAS_DISCOVERY_COMP *) p_param;
    btmce_mas_instance_t insts[BTA_MCE_MAX_MAS_INSTANCES];
    tls_bt_addr_t addr;
    int i;
    BTIF_TRACE_EVENT("%s:  event = %d", __FUNCTION__, event);

    if(event != BTA_MCE_MAS_DISCOVERY_COMP_EVT)
    {
        return;
    }

    for(i = 0; i < evt_data->num_mas; i++)
    {
        insts[i].id = evt_data->mas[i].instance_id;
        insts[i].scn = evt_data->mas[i].scn;
        insts[i].msg_types = evt_data->mas[i].msg_type;
        insts[i].p_name = evt_data->mas[i].p_srv_name;
    }

    bdcpy(addr.address, evt_data->remote_addr);
    HAL_CBACK(bt_mce_callbacks, remote_mas_instances_cb, evt_data->status, &addr, evt_data->num_mas, insts);
}

static void mas_discovery_comp_copy_cb(uint16_t event, char *p_dest, char *p_src)
{
    tBTA_MCE_MAS_DISCOVERY_COMP *p_dest_data = (tBTA_MCE_MAS_DISCOVERY_COMP *) p_dest;
    tBTA_MCE_MAS_DISCOVERY_COMP *p_src_data = (tBTA_MCE_MAS_DISCOVERY_COMP *) p_src;
    char *p_dest_str;
    int i;

    if(!p_src)
    {
        return;
    }

    if(event != BTA_MCE_MAS_DISCOVERY_COMP_EVT)
    {
        return;
    }

    maybe_non_aligned_memcpy(p_dest_data, p_src_data, sizeof(*p_src_data));
    p_dest_str = p_dest + sizeof(tBTA_MCE_MAS_DISCOVERY_COMP);

    for(i = 0; i < p_src_data->num_mas; i++)
    {
        p_dest_data->mas[i].p_srv_name = p_dest_str;
        wm_memcpy(p_dest_str, p_src_data->mas[i].p_srv_name, p_src_data->mas[i].srv_name_len);
        p_dest_str += p_src_data->mas[i].srv_name_len;
        *(p_dest_str++) = '\0';
    }
}

static void mce_dm_cback(tBTA_MCE_EVT event, tBTA_MCE *p_data, void *user_data)
{
    switch(event)
    {
        case BTA_MCE_MAS_DISCOVERY_COMP_EVT:
        {
            int i;
            uint16_t param_len = sizeof(tBTA_MCE);

            /* include space for all p_srv_name copies including null-termination */
            for(i = 0; i < p_data->mas_disc_comp.num_mas; i++)
            {
                param_len += (p_data->mas_disc_comp.mas[i].srv_name_len + 1);
            }

            /* need to deepy copy p_srv_name and null-terminate */
            btif_transfer_context(btif_mce_mas_discovery_comp_evt, event,
                                  (char *)p_data, param_len, mas_discovery_comp_copy_cb);
            break;
        }
    }
}

static tls_bt_status_t init(btmce_callbacks_t *callbacks)
{
    BTIF_TRACE_EVENT("%s", __FUNCTION__);
    bt_mce_callbacks = callbacks;
    btif_enable_service(BTA_MAP_SERVICE_ID);
    return TLS_BT_STATUS_SUCCESS;
}

static tls_bt_status_t get_remote_mas_instances(tls_bt_addr_t *bd_addr)
{
    bdstr_t bdstr;
    BTIF_TRACE_EVENT("%s: remote_addr=%s", __FUNCTION__, bdaddr_to_string(bd_addr, bdstr, sizeof(bdstr)));
    BTA_MceGetRemoteMasInstances(bd_addr->address);
    return TLS_BT_STATUS_SUCCESS;
}

static const btmce_interface_t mce_if =
{
    sizeof(btmce_interface_t),
    init,
    get_remote_mas_instances,
};

const btmce_interface_t *btif_mce_get_interface(void)
{
    BTIF_TRACE_EVENT("%s", __FUNCTION__);
    return &mce_if;
}

/*******************************************************************************
**
** Function         btif_mce_execute_service
**
** Description      Initializes/Shuts down the service
**
** Returns          BT_STATUS_SUCCESS on success, BT_STATUS_FAIL otherwise
**
*******************************************************************************/
tls_bt_status_t btif_mce_execute_service(uint8_t b_enable)
{
    BTIF_TRACE_EVENT("%s enable:%d", __FUNCTION__, b_enable);

    if(b_enable)
    {
        BTA_MceEnable(mce_dm_cback);
    }
    else
    {
        /* This is called on BT disable so no need to extra cleanup */
    }

    return TLS_BT_STATUS_SUCCESS;
}
#endif
