/*
 * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
 * Copyright (C) 2017 Furrtek
 * 
 * This file is part of PortaPack.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#include "ui.hpp"

#include "ui_receiver.hpp"
#include "ui_geomap.hpp"
#include "ui_font_fixed_8x16.hpp"

#include "file.hpp"
#include "recent_entries.hpp"
#include "log_file.hpp"
#include "adsb.hpp"
#include "message.hpp"

#include "crc.hpp"

using namespace adsb;

namespace ui {

#define ADSB_DECAY_A 		10		// In seconds
#define ADSB_DECAY_B 		30
#define ADSB_DECAY_C 		60		// Can be used for removing old entries, RecentEntries already caps to 64

#define AIRCRAFT_ID_L		1		// aircraft ID message type (lowest type id)
#define AIRCRAFT_ID_H		4		// aircraft ID message type (highest type id)

#define SURFACE_POS_L		5		// surface position (lowest type id)
#define SURFACE_POS_H		8		// surface position (highest type id)

#define AIRBORNE_POS_BARO_L	9		// airborne position (lowest type id)
#define AIRBORNE_POS_BARO_H	18		// airborne position (highest type id)

#define AIRBORNE_VEL		19		// airborne velocities

#define AIRBORNE_POS_GPS_L	20		// airborne position (lowest type id)
#define AIRBORNE_POS_GPS_H	22		// airborne position (highest type id)

#define RESERVED_L			23		// reserved for other uses
#define RESERVED_H			31		// reserved for other uses

#define VEL_GND_SUBSONIC		1
#define VEL_GND_SUPERSONIC		2
#define VEL_AIR_SUBSONIC		3
#define VEL_AIR_SUPERSONIC		4

#define O_E_FRAME_TIMEOUT		20	// timeout between odd and even frames

struct AircraftRecentEntry {
	using Key = uint32_t;
	
	static constexpr Key invalid_key = 0xffffffff;
	
	uint32_t ICAO_address { };
	uint16_t hits { 0 };
	
	uint16_t age_state { 1 };
	uint32_t age { 0 };
	adsb_pos pos { false, 0, 0, 0 };
	adsb_vel velo { false, 0, 999, 0 };
	ADSBFrame frame_pos_even { };
	ADSBFrame frame_pos_odd { };
	
	std::string callsign { "        " };
	std::string time_string { "" };
	std::string info_string { "" };
	
	AircraftRecentEntry(
		const uint32_t ICAO_address
	) : ICAO_address { ICAO_address }
	{
	}

	Key key() const {
		return ICAO_address;
	}
	
	void set_callsign(std::string& new_callsign) {
		callsign = new_callsign;
	}
	
	void inc_hit() {
		hits++;
	}
	
	void set_frame_pos(ADSBFrame& frame, uint32_t parity) {
		if (!parity)
			frame_pos_even = frame;
		else
			frame_pos_odd = frame;
		
		if (!frame_pos_even.empty() && !frame_pos_odd.empty()) {
			if (abs(frame_pos_even.get_rx_timestamp() - frame_pos_odd.get_rx_timestamp()) < O_E_FRAME_TIMEOUT)
				pos = decode_frame_pos(frame_pos_even, frame_pos_odd);
		}
	}

	void set_frame_velo(ADSBFrame& frame){
		velo = decode_frame_velo(frame);
	}
	
	void set_info_string(std::string& new_info_string) {
		info_string = new_info_string;
	}
	
	void set_time_string(std::string& new_time_string) {
		time_string = new_time_string;
	}

	void reset_age() {
		age = 0;
	}
	
	void inc_age() {
		age++;
		if (age < ADSB_DECAY_A)
		{
			age_state = pos.valid ? 0 : 1;
		}
		else
		{
			age_state = (age < ADSB_DECAY_B) ? 2 : 3;
		}
	}
};

using AircraftRecentEntries = RecentEntries<AircraftRecentEntry>;

class ADSBLogger {
public:
	Optional<File::Error> append(const std::filesystem::path& filename) {
		return log_file.append(filename);
	}
	void log_str(std::string& logline);

private:
	LogFile log_file { };
};


class ADSBRxDetailsView : public View {
public:
	ADSBRxDetailsView(NavigationView&, const AircraftRecentEntry& entry, const std::function<void(void)> on_close);
	~ADSBRxDetailsView();

	ADSBRxDetailsView(const ADSBRxDetailsView&) = delete;
	ADSBRxDetailsView(ADSBRxDetailsView&&) = delete;
	ADSBRxDetailsView& operator=(const ADSBRxDetailsView&) = delete;
	ADSBRxDetailsView& operator=(ADSBRxDetailsView&&) = delete;
	
	void focus() override;
	
	void update(const AircraftRecentEntry& entry);
	
	std::string title() const override { return "Details"; };

	AircraftRecentEntry get_current_entry() { return entry_copy; }
	
private:
	AircraftRecentEntry entry_copy { 0 };
	std::function<void(void)> on_close_ { };
	GeoMapView* geomap_view { nullptr };
	bool send_updates { false };
	File db_file { };
	
	Labels labels {
		{ { 0 * 8, 1 * 16 }, "Callsign:", Color::light_grey() },
		{ { 0 * 8, 2 * 16 }, "Last seen:", Color::light_grey() },
		{ { 0 * 8, 3 * 16 }, "Airline:", Color::light_grey() },
		{ { 0 * 8, 5 * 16 }, "Country:", Color::light_grey() },
		{ { 0 * 8, 13 * 16 }, "Even position frame:", Color::light_grey() },
		{ { 0 * 8, 15 * 16 }, "Odd position frame:", Color::light_grey() }
	};
	
	Text text_callsign {
		{ 9 * 8, 1 * 16, 8 * 8, 16 },
		"-"
	};
	
	Text text_last_seen {
		{ 11 * 8, 2 * 16, 19 * 8, 16 },
		"-"
	};
	
	Text text_airline {
		{ 0 * 8, 4 * 16, 30 * 8, 16 },
		"-"
	};
	
	Text text_country {
		{ 8 * 8, 5 * 16, 22 * 8, 16 },
		"-"
	};
	
	Text text_infos {
		{ 0 * 8, 6 * 16, 30 * 8, 16 },
		"-"
	};

	Text text_info2 {
		{0*8, 7*16, 30*8, 16},
		"-"
	};

	Text text_frame_pos_even {
		{ 0 * 8, 14 * 16, 30 * 8, 16 },
		"-"
	};
	Text text_frame_pos_odd {
		{ 0 * 8, 16 * 16, 30 * 8, 16 },
		"-"
	};
	
	Button button_see_map {
		{ 8 * 8, 9 * 16, 14 * 8, 3 * 16 },
		"See on map"
	};
};
	
class ADSBRxView : public View {
public:
	ADSBRxView(NavigationView& nav);
	~ADSBRxView();
	
	ADSBRxView(const ADSBRxView&) = delete;
	ADSBRxView(ADSBRxView&&) = delete;
	ADSBRxView& operator=(const ADSBRxView&) = delete;
	ADSBRxView& operator=(ADSBRxView&&) = delete;
	
	void focus() override;
	
	std::string title() const override { return "ADS-B receive"; };

	void replace_entry(AircraftRecentEntry & entry);
	AircraftRecentEntry find_or_create_entry(uint32_t ICAO_address);
	void sort_entries_by_state();

private:
	rf::Frequency prevFreq;
	std::unique_ptr<ADSBLogger> logger { };
	void on_frame(const ADSBFrameMessage * message);
	void on_tick_second();
	
	const RecentEntriesColumns columns { {
#if false
		{ "ICAO", 6 },
		{ "Callsign", 9 },
		{ "Hits", 4 },
		{ "Time", 8 }
#else
		{ "ICAO/Call", 9 },
		{ "Alt", 6 },
		{ "Spd", 4 },
		{ "Hits", 4 },
		{ "Age", 4 }
#endif
	} };
	AircraftRecentEntries recent { };
	RecentEntriesView<RecentEntries<AircraftRecentEntry>> recent_entries_view { columns, recent };
	
	SignalToken signal_token_tick_second { };
	ADSBRxDetailsView* details_view { nullptr };
	uint32_t detailed_entry_key { 0 };
	bool send_updates { false };
	
	Labels labels {
		{ { 0 * 8, 0 * 8 }, "LNA:   VGA:   AMP:", Color::light_grey() }
	};
	
	LNAGainField field_lna {
		{ 4 * 8, 0 * 16 }
	};

	VGAGainField field_vga {
		{ 11 * 8, 0 * 16 }
	};
	
	RFAmpField field_rf_amp {
		{ 18 * 8, 0 * 16 }
	};
	
	RSSI rssi {
		{ 20 * 8, 4, 10 * 8, 8 },
	};
	
	MessageHandlerRegistration message_handler_frame {
		Message::ID::ADSBFrame,
		[this](Message* const p) {
			const auto message = static_cast<const ADSBFrameMessage*>(p);
			this->on_frame(message);
		}
	};
};

} /* namespace ui */