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/*
 * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
 * Copyright (c) 2018,2019 TOYOTA MOTOR 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.
 */

#ifndef LIBHOMESCREEN_H
#define LIBHOMESCREEN_H
#include <vector>
#include <map>
#include <string>
#include <functional>
#include <json-c/json.h>
#include <systemd/sd-event.h>
extern "C"
{
#include <afb/afb-wsj1.h>
#include <afb/afb-ws-client.h>
}

class LibHomeScreen
{
public:
	LibHomeScreen();
	~LibHomeScreen();

	LibHomeScreen(const LibHomeScreen &) = delete;
	LibHomeScreen &operator=(const LibHomeScreen &) = delete;

	using handler_func = std::function<void(json_object*)>;

	enum EventType {
		Event_Min,
		Event_ShowWindow = 1,
		Event_TapShortcut = 1,
		Event_OnScreenMessage,
		Event_OnScreenReply,
		Event_HideWindow,
		Event_ReplyShowWindow,
		Event_ShowNotification,
		Event_ShowInformation,
		Event_AppListChanged,
		Event_Max
	};

	static const std::vector<std::string> api_list;
	static const std::vector<std::string> event_list;

	/* Method */
	int init(const int port, const std::string& token);

	int tapShortcut(const char* application_id);
	int onScreenMessage(const char* display_message);
	int onScreenReply(const char* reply_message);

	void set_event_handler(enum EventType et, handler_func f);

	void registerCallback(
		void (*event_cb)(const std::string& event, struct json_object* event_contents),
		void (*reply_cb)(struct json_object* reply_contents),
		void (*hangup_cb)(void) = nullptr);

	int call(const std::string& verb, struct json_object* arg);
	int call(const char* verb, struct json_object* arg);
	int subscribe(const std::string& event_name);
	int unsubscribe(const std::string& event_name);

	int showWindow(const char* application_id, json_object* json);
	int hideWindow(const char* application_id);
	int replyShowWindow(const char* application_id, json_object* json);
	int showNotification(json_object* json);
	int showInformation(json_object* json);
	int getRunnables(void);


private:
	int initialize_websocket();

	void (*onEvent)(const std::string& event, struct json_object* event_contents);
	void (*onReply)(struct json_object* reply);
	void (*onHangup)(void);

	struct afb_wsj1* sp_websock;
	struct afb_wsj1_itf minterface;
	sd_event* mploop;
	std::string muri;

	int mport = 2000;
	std::string mtoken = "hs";

	std::map<EventType, handler_func> handlers;

public:
	/* Don't use/ Internal only */
	void on_hangup(void *closure, struct afb_wsj1 *wsj);
	void on_call(void *closure, const char *api, const char *verb, struct afb_wsj1_msg *msg);
	void on_event(void *closure, const char *event, struct afb_wsj1_msg *msg);
	void on_reply(void *closure, struct afb_wsj1_msg *msg);
};

#endif /* LIBHOMESCREEN_H */