/*

 * Copyright (C) 2013 Intel 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.

 *

 */

#define _GNU_SOURCE

#include <stdbool.h>

#include <stddef.h>

#include <string.h>

#include "hal-utils.h"

#include "hal-log.h"

#include "hal.h"

#include "hal-msg.h"

#include "hal-ipc.h"

static const btpan_callbacks_t *cbs = NULL;

static bool interface_ready(void)

{

	return cbs != NULL;

}

static void handle_conn_state(void *buf, uint16_t len, int fd)

{

	struct hal_ev_pan_conn_state *ev = buf;

	if (cbs->connection_state_cb)

		cbs->connection_state_cb(ev->state, ev->status,

					(bt_bdaddr_t *) ev->bdaddr,

					ev->local_role, ev->remote_role);

}

static void handle_ctrl_state(void *buf, uint16_t len, int fd)

{

	struct hal_ev_pan_ctrl_state *ev = buf;

#if ANDROID_VERSION >= PLATFORM_VER(5, 0, 0)

	if (cbs->control_state_cb)

		cbs->control_state_cb(ev->state, ev->local_role, ev->status,

							(char *)ev->name);

#else

	/*

	 * Callback declared in bt_pan.h is 'typedef void

	 * (*btpan_control_state_callback)(btpan_control_state_t state,

	 * bt_status_t error, int local_role, const char* ifname);

	 * But PanService.Java defined it wrong way.

	 * private void onControlStateChanged(int local_role, int state,

	 * int error, String ifname).

	 * First and third parameters are misplaced, so sending data according

	 * to PanService.Java.

	 */

	if (cbs->control_state_cb)

		cbs->control_state_cb(ev->local_role, ev->state, ev->status,

							(char *)ev->name);

#endif

}

/*

 * handlers will be called from notification thread context,

 * index in table equals to 'opcode - HAL_MINIMUM_EVENT'

 */

static const struct hal_ipc_handler ev_handlers[] = {

	/* HAL_EV_PAN_CTRL_STATE */

	{ handle_ctrl_state, false, sizeof(struct hal_ev_pan_ctrl_state) },

	/* HAL_EV_PAN_CONN_STATE */

	{ handle_conn_state, false, sizeof(struct hal_ev_pan_conn_state) },

};

static bt_status_t pan_enable(int local_role)

{

	struct hal_cmd_pan_enable cmd;

	DBG("");

	if (!interface_ready())

		return BT_STATUS_NOT_READY;

	cmd.local_role = local_role;

	return hal_ipc_cmd(HAL_SERVICE_ID_PAN, HAL_OP_PAN_ENABLE,

					sizeof(cmd), &cmd, NULL, NULL, NULL);

}

static int pan_get_local_role(void)

{

	struct hal_rsp_pan_get_role rsp;

	size_t len = sizeof(rsp);

	bt_status_t status;

	DBG("");

	if (!interface_ready())

		return BTPAN_ROLE_NONE;

	status = hal_ipc_cmd(HAL_SERVICE_ID_PAN, HAL_OP_PAN_GET_ROLE, 0, NULL,

							&len, &rsp, NULL);

	if (status != BT_STATUS_SUCCESS)

		return BTPAN_ROLE_NONE;

	return rsp.local_role;

}

static bt_status_t pan_connect(const bt_bdaddr_t *bd_addr, int local_role,

					int remote_role)

{

	struct hal_cmd_pan_connect cmd;

	DBG("");

	if (!interface_ready())

		return BT_STATUS_NOT_READY;

	memcpy(cmd.bdaddr, bd_addr, sizeof(cmd.bdaddr));

	cmd.local_role = local_role;

	cmd.remote_role = remote_role;

	return hal_ipc_cmd(HAL_SERVICE_ID_PAN, HAL_OP_PAN_CONNECT,

					sizeof(cmd), &cmd, NULL, NULL, NULL);

}

static bt_status_t pan_disconnect(const bt_bdaddr_t *bd_addr)

{

	struct hal_cmd_pan_disconnect cmd;

	DBG("");

	if (!interface_ready())

		return BT_STATUS_NOT_READY;

	memcpy(cmd.bdaddr, bd_addr, sizeof(cmd.bdaddr));

	return hal_ipc_cmd(HAL_SERVICE_ID_PAN, HAL_OP_PAN_DISCONNECT,

					sizeof(cmd), &cmd, NULL, NULL, NULL);

}

static bt_status_t pan_init(const btpan_callbacks_t *callbacks)

{

	struct hal_cmd_register_module cmd;

	int ret;

	DBG("");

	if (interface_ready())

		return BT_STATUS_DONE;

	cbs = callbacks;

	hal_ipc_register(HAL_SERVICE_ID_PAN, ev_handlers,

				sizeof(ev_handlers)/sizeof(ev_handlers[0]));

	cmd.service_id = HAL_SERVICE_ID_PAN;

	cmd.mode = HAL_MODE_DEFAULT;

	cmd.max_clients = 1;

	ret = hal_ipc_cmd(HAL_SERVICE_ID_CORE, HAL_OP_REGISTER_MODULE,

					sizeof(cmd), &cmd, NULL, NULL, NULL);

	if (ret != BT_STATUS_SUCCESS) {

		cbs = NULL;

		hal_ipc_unregister(HAL_SERVICE_ID_PAN);

	}

	return ret;

}

static void pan_cleanup(void)

{

	struct hal_cmd_unregister_module cmd;

	DBG("");

	if (!interface_ready())

		return;

	cmd.service_id = HAL_SERVICE_ID_PAN;

	hal_ipc_cmd(HAL_SERVICE_ID_CORE, HAL_OP_UNREGISTER_MODULE,

					sizeof(cmd), &cmd, NULL, NULL, NULL);

	hal_ipc_unregister(HAL_SERVICE_ID_PAN);

	cbs = NULL;

}

static btpan_interface_t pan_if = {

	.size = sizeof(pan_if),

	.init = pan_init,

	.enable = pan_enable,

	.get_local_role = pan_get_local_role,

	.connect = pan_connect,

	.disconnect = pan_disconnect,

	.cleanup = pan_cleanup

};

btpan_interface_t *bt_get_pan_interface(void)

{

	return &pan_if;

}