/*
 * Copyright (c) 2020 The ZMK Contributors
 *
 * SPDX-License-Identifier: MIT
 */

#include <zephyr/types.h>
#include <sys/util.h>

#include <logging/log.h>

LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);

#include <bluetooth/gatt.h>
#include <bluetooth/uuid.h>

#include <zmk/matrix.h>
#include <zmk/split/bluetooth/uuid.h>
#include <zmk/split/bluetooth/service.h>

static u8_t num_of_positions = ZMK_KEYMAP_LEN;
static u8_t position_state[16];

static ssize_t split_svc_pos_state(struct bt_conn *conn, const struct bt_gatt_attr *attrs, void *buf, u16_t len, u16_t offset)
{
    return bt_gatt_attr_read(conn, attrs, buf, len, offset, &position_state, sizeof(position_state));
}

static ssize_t split_svc_num_of_positions(struct bt_conn *conn, const struct bt_gatt_attr *attrs, void *buf, u16_t len, u16_t offset)
{
    return bt_gatt_attr_read(conn, attrs, buf, len, offset, attrs->user_data, sizeof(u8_t));
}

static void split_svc_pos_state_ccc(const struct bt_gatt_attr *attr, u16_t value)
{
    LOG_DBG("value %d", value);
}


BT_GATT_SERVICE_DEFINE(split_svc,
                       BT_GATT_PRIMARY_SERVICE(BT_UUID_DECLARE_128(ZMK_SPLIT_BT_SERVICE_UUID)),
                       BT_GATT_CHARACTERISTIC(BT_UUID_DECLARE_128(ZMK_SPLIT_BT_CHAR_POSITION_STATE_UUID), BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY,
                                              BT_GATT_PERM_READ_ENCRYPT,
                                              split_svc_pos_state, NULL, &position_state),
                       BT_GATT_CCC(split_svc_pos_state_ccc,
                                   BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT),
                       BT_GATT_DESCRIPTOR(BT_UUID_NUM_OF_DIGITALS, BT_GATT_PERM_READ,
                                          split_svc_num_of_positions, NULL, &num_of_positions),
);

int zmk_split_bt_position_pressed(u8_t position)
{
    WRITE_BIT(position_state[position / 8], position % 8, true);
    return bt_gatt_notify(NULL, &split_svc.attrs[1], &position_state, sizeof(position_state));
}

int zmk_split_bt_position_released(u8_t position)
{
    WRITE_BIT(position_state[position / 8], position % 8, false);
    return bt_gatt_notify(NULL, &split_svc.attrs[1], &position_state, sizeof(position_state));
}