/*
 * 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.
 */

#ifndef __GEOMAP_H__
#define __GEOMAP_H__

#include "ui.hpp"
#include "file.hpp"
#include "ui_navigation.hpp"
#include "ui_font_fixed_8x16.hpp"

#include "portapack.hpp"

namespace ui {

enum GeoMapMode {
	DISPLAY,
	PROMPT
};

struct GeoMarker {
	public:
		float lat {0};
		float lon {0};
		uint16_t angle {0};
		std::string tag {""};

		GeoMarker & operator=(GeoMarker & rhs){ 
			lat = rhs.lat;
			lon = rhs.lon;
			angle = rhs.angle;
			tag = rhs.tag;

			return *this;
		} 
};


class GeoPos : public View {
public:
	enum alt_unit {
		FEET = 0,
		METERS
	};
	
	std::function<void(int32_t, float, float)> on_change { };
	
	GeoPos(const Point pos, const alt_unit altitude_unit);
	
	void focus() override;
	
	void set_read_only(bool v);
	void set_altitude(int32_t altitude);
	void set_lat(float lat);
	void set_lon(float lon);
	int32_t altitude();
	float lat();
	float lon();
	
	void set_report_change(bool v);

private:
	bool read_only { false };
	bool report_change { true };
	alt_unit altitude_unit_ { };

	Labels labels_position {
		{ { 1 * 8, 0 * 16 }, "Alt:", Color::light_grey() },
		{ { 1 * 8, 1 * 16 }, "Lat:    *  '  \"", Color::light_grey() },	// No ° symbol in 8x16 font
		{ { 1 * 8, 2 * 16 }, "Lon:    *  '  \"", Color::light_grey() },
	};
	
	NumberField field_altitude {
		{ 6 * 8, 0 * 16 },
		5,
		{ -1000, 50000 },
		250,
		' '
	};
	Text text_alt_unit {
		{ 12 * 8, 0 * 16, 2 * 8, 16 },
		""
	};
	
	NumberField field_lat_degrees {
		{ 5 * 8, 1 * 16 }, 4, { -90, 90 }, 1, ' '
	};
	NumberField field_lat_minutes {
		{ 10 * 8, 1 * 16 }, 2, { 0, 59 }, 1, ' '
	};
	NumberField field_lat_seconds {
		{ 13 * 8, 1 * 16 }, 2, { 0, 59 }, 1, ' '
	};
	Text text_lat_decimal {
		{ 17 * 8, 1 * 16, 13 * 8, 1 * 16 },
		""
	};
	
	NumberField field_lon_degrees {
		{ 5 * 8, 2 * 16 }, 4, { -180, 180 }, 1, ' '
	};
	NumberField field_lon_minutes {
		{ 10 * 8, 2 * 16 }, 2, { 0, 59 }, 1, ' '
	};
	NumberField field_lon_seconds {
		{ 13 * 8, 2 * 16 }, 2, { 0, 59 }, 1, ' '
	};
	Text text_lon_decimal {
		{ 17 * 8, 2 * 16, 13 * 8, 1 * 16 },
		""
	};
};

enum MapMarkerStored {
	MARKER_NOT_STORED,
	MARKER_STORED,
	MARKER_LIST_FULL
};

class GeoMap : public Widget {
public:
	std::function<void(float, float)> on_move { };

	GeoMap(Rect parent_rect);

	void paint(Painter& painter) override;

	bool on_touch(const TouchEvent event) override;
	
	bool init();
	void set_mode(GeoMapMode mode);
	void move(const float lon, const float lat);
	void set_tag(std::string new_tag) {
		tag_ = new_tag;
	}

	void set_angle(uint16_t new_angle){
		angle_ = new_angle;
	}

	static const int NumMarkerListElements = 30;

	void clear_markers();
	MapMarkerStored store_marker(GeoMarker & marker);

private:
	void draw_bearing(const Point origin, const uint16_t angle, uint32_t size, const Color color);
	void draw_marker(Painter& painter, const ui::Point itemPoint, const uint16_t itemAngle, const std::string itemTag, 
	                 const Color color = Color::red(), const Color fontColor = Color::white(), const Color backColor = Color::black() );

	GeoMapMode mode_ { };
	File map_file { };
	uint16_t map_width { }, map_height { };
	int32_t map_center_x { }, map_center_y { };
	float lon_ratio { }, lat_ratio { };
	double map_bottom { };
	double map_world_lon { }; 
    double map_offset { };

	int32_t x_pos { }, y_pos { };
	int32_t prev_x_pos { 0xFFFF }, prev_y_pos { 0xFFFF };
	float lat_ { };
	float lon_ { };
	uint16_t angle_ { };
	std::string tag_ { };

	int markerListLen {0};
	GeoMarker markerList[NumMarkerListElements];
	bool markerListUpdated {false};
};

class GeoMapView : public View {
public:
	GeoMapView(
		NavigationView& nav,
		const std::string& tag,
		int32_t altitude,
		GeoPos::alt_unit altitude_unit,
		float lat,
		float lon,
		uint16_t angle,
		const std::function<void(void)> on_close = nullptr
	);
	GeoMapView(NavigationView& nav,
		int32_t altitude,
		GeoPos::alt_unit altitude_unit,
		float lat,
		float lon,
		const std::function<void(int32_t, float, float)> on_done
	);
	~GeoMapView();
	
	GeoMapView(const GeoMapView&) = delete;
	GeoMapView(GeoMapView&&) = delete;
	GeoMapView& operator=(const GeoMapView&) = delete;
	GeoMapView& operator=(GeoMapView&&) = delete;
	
	void focus() override;
	
	void update_position(float lat, float lon, uint16_t angle, int32_t altitude);
	
	std::string title() const override { return "Map view"; };

	void clear_markers();
	MapMarkerStored store_marker(GeoMarker & marker);

	void update_tag(const std::string tag);


private:
	NavigationView& nav_;
	
	void setup();
	
	const std::function<void(int32_t, float, float)> on_done { };
	
	const Dim banner_height = 3 * 16;
	GeoMapMode mode_ { };
	int32_t altitude_ { };
	GeoPos::alt_unit altitude_unit_ { };
	float lat_ { };
	float lon_ { };
	uint16_t angle_ { };
	std::function<void(void)> on_close_ { nullptr };
	
	bool map_opened { };
	
	GeoPos geopos {
		{ 0, 0 },
		altitude_unit_
	};
	
	GeoMap geomap {
		{ 0, banner_height, 240, 320 - 16 - banner_height }
	};
	
	Button button_ok {
		{ 20 * 8, 8, 8 * 8, 2 * 16 },
		"OK"
	};
};

} /* namespace ui */

#endif