/****************************************************************************
 *
 *   Copyright (c) 2014, 2015 PX4 Development Team. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name PX4 nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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 ****************************************************************************/

#pragma once

/// @file mavlink_log_handler.h
/// @author px4dev, Gus Grubba <mavlink@grubba.com>

#include <dirent.h>
#include <queue.h>
#include <time.h>
#include <stdio.h>
#include <v2.0/mavlink_types.h>
#include "mavlink_stream.h"

class Mavlink;

// Log Listing Helper
class LogListHelper
{
public:
	LogListHelper();
	~LogListHelper();

public:
	static void delete_all(const char* dir);

public:

	bool        get_entry           (int idx, uint32_t& size, uint32_t& date, char* filename = 0);
	bool        open_for_transmit();
	size_t      get_log_data        (uint8_t len, uint8_t* buffer);

	enum {
		LOG_HANDLER_IDLE,
		LOG_HANDLER_LISTING,
		LOG_HANDLER_SENDING_DATA
	};

	int         next_entry;
	int         last_entry;
	int         log_count;

	int         current_status;
	uint16_t    current_log_index;
	uint32_t    current_log_size;
	uint32_t    current_log_data_offset;
	uint32_t    current_log_data_remaining;
	FILE*       current_log_filep;
	char        current_log_filename[128];

private:
	void        _init                   ();
	bool        _get_session_date       (const char* path, const char* dir, time_t& date);
	void        _scan_logs              (FILE* f, const char* dir, time_t& date);
	bool        _get_log_time_size      (const char* path, const char* file, time_t& date, uint32_t& size);
};

// MAVLink LOG_* Message Handler
class MavlinkLogHandler : public MavlinkStream
{
public:
	MavlinkLogHandler(Mavlink *mavlink);

	static MavlinkLogHandler *new_instance(Mavlink *mavlink);

	// Handle possible LOG message
	void handle_message             (const mavlink_message_t *msg);

	// Overrides from MavlinkStream
	const char*     get_name        (void) const;
	uint8_t         get_id          (void);
	unsigned        get_size        (void);
	void            send            (const hrt_abstime t);

private:
	void _log_message               (const mavlink_message_t *msg);
	void _log_request_list          (const mavlink_message_t *msg);
	void _log_request_data          (const mavlink_message_t *msg);
	void _log_request_erase         (const mavlink_message_t *msg);
	void _log_request_end           (const mavlink_message_t *msg);

	size_t _log_send_listing();
	size_t _log_send_data   ();

private:
	LogListHelper    *_pLogHandlerHelper;

};
