/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

#include <assert.h>
#include <stdio.h>
#include <string.h>
#include "host/ble_hs.h"
#include "host/ble_uuid.h"
// #include "blehr_sens.h"

#include "services/dis/ble_svc_dis.h"
#include "services/bas/ble_svc_bas.h"

#define GATT_DEVICE_INFO_UUID                   0x180A
#define GATT_MANUFACTURER_NAME_UUID             0x2A29
#define GATT_MODEL_NUMBER_UUID                  0x2A24

#define REPLY_BUFFER_SIZE 100
static char reply[REPLY_BUFFER_SIZE];

static int gatt_svr_chr_access_device_info_manufacturer(
        uint16_t conn_handle, uint16_t attr_handle,
        struct ble_gatt_access_ctxt *ctxt, void *arg);

static int gatt_svr_chr_access_device_info_model(
        uint16_t conn_handle, uint16_t attr_handle,
        struct ble_gatt_access_ctxt *ctxt, void *arg);

/* define several bluetooth services for our device */
static const struct ble_gatt_svc_def gatt_svr_svcs[] = {
    /*
     * access_cb defines a callback for read and write access events on
     * given characteristics
     */
    {
        /* Service: Device Information */
        .type = BLE_GATT_SVC_TYPE_PRIMARY,
        .uuid = BLE_UUID16_DECLARE(GATT_DEVICE_INFO_UUID),
        .characteristics = (struct ble_gatt_chr_def[]) { {
            /* Characteristic: * Manufacturer name */
            .uuid = BLE_UUID16_DECLARE(GATT_MANUFACTURER_NAME_UUID),
            .access_cb = gatt_svr_chr_access_device_info_manufacturer,
            .flags = BLE_GATT_CHR_F_READ,
        }, {
            /* Characteristic: Model number string */
            .uuid = BLE_UUID16_DECLARE(GATT_MODEL_NUMBER_UUID),
            .access_cb = gatt_svr_chr_access_device_info_model,
            .flags = BLE_GATT_CHR_F_READ,
        }, {
            0, /* No more characteristics in this service */
        }, }
    },
    {
        0, /* No more services */
    },
};

static int gatt_svr_chr_access_device_info_manufacturer(
        uint16_t conn_handle, uint16_t attr_handle,
        struct ble_gatt_access_ctxt *ctxt, void *arg)
{
    printf("service 'device info: manufacturer' callback triggered\n");

    snprintf(reply, REPLY_BUFFER_SIZE, "This is TencentOS tiny\n");
    printf("reply: %s\n", reply);

    int rc = os_mbuf_append(ctxt->om, reply, strlen(reply));

    printf("\n");

    return rc;
}

static int gatt_svr_chr_access_device_info_model(
        uint16_t conn_handle, uint16_t attr_handle,
        struct ble_gatt_access_ctxt *ctxt, void *arg)
{
    printf("service 'device info: model' callback triggered\n");

    snprintf(reply, REPLY_BUFFER_SIZE, "running TencentOS tiny on nordic ble board");
    printf("reply: %s\n", reply);

    int rc = os_mbuf_append(ctxt->om, reply, strlen(reply));

    printf("\n");

    return rc;
}

void
gatt_svr_register_cb(struct ble_gatt_register_ctxt *ctxt, void *arg)
{
    char buf[BLE_UUID_STR_LEN];

    switch (ctxt->op) {
    case BLE_GATT_REGISTER_OP_SVC:
        MODLOG_DFLT(DEBUG, "registered service %s with handle=%d\n",
                    ble_uuid_to_str(ctxt->svc.svc_def->uuid, buf),
                    ctxt->svc.handle);
        break;

    case BLE_GATT_REGISTER_OP_CHR:
        MODLOG_DFLT(DEBUG, "registering characteristic %s with "
                           "def_handle=%d val_handle=%d\n",
                    ble_uuid_to_str(ctxt->chr.chr_def->uuid, buf),
                    ctxt->chr.def_handle,
                    ctxt->chr.val_handle);
        break;

    case BLE_GATT_REGISTER_OP_DSC:
        MODLOG_DFLT(DEBUG, "registering descriptor %s with handle=%d\n",
                    ble_uuid_to_str(ctxt->dsc.dsc_def->uuid, buf),
                    ctxt->dsc.handle);
        break;

    default:
        assert(0);
        break;
    }
}

int
gatt_svr_init(void)
{
    int rc;

    rc = ble_gatts_count_cfg(gatt_svr_svcs);
    if (rc != 0) {
        return rc;
    }

    rc = ble_gatts_add_svcs(gatt_svr_svcs);
    if (rc != 0) {
        return rc;
    }

    return 0;
}