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/****************************************************************************

 *   Copyright (C) 2009-2010 by Claas Anders "CaScAdE" Rathje               *

 *   admiralcascade@gmail.com                                               *

 *   Project-URL: http://www.mylifesucks.de/oss/c-osd/                      *

 *                                                                          *

 *   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 of the License.         *

 *                                                                          *

 *   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; if not, write to the                          *

 *   Free Software Foundation, Inc.,                                        *

 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.              *

 ****************************************************************************/

#include <avr/pgmspace.h>

#include "main.h"

#include "osd_helpers.h"

#include "max7456_software_spi.h"

#if !(ALLCHARSDEBUG|(WRITECHARS != -1))

/* ##########################################################################

 * compass stuff

 * ##########################################################################*/

/**

 * convert the <heading> gotton from NC into an index

 */

uint8_t heading_conv(uint16_t heading) {

    if (heading > 23 && heading < 68) {

        //direction = "NE";

        return 0;

    } else if (heading > 67 && heading < 113) {

        //direction = "E ";

        return 1;

    } else if (heading > 112 && heading < 158) {

        //direction = "SE";

        return 2;

    } else if (heading > 157 && heading < 203) {

        //direction = "S ";

        return 3;

    } else if (heading > 202 && heading < 248) {

        //direction = "SW";

        return 4;

    } else if (heading > 247 && heading < 293) {

        //direction = "W ";

        return 5;

    } else if (heading > 292 && heading < 338) {

        //direction = "NW";

        return 6;

    }

    //direction = "N ";

    return 7;

}

/**

 * convert the <heading> gotton from NC into a more

 * precise index

 */

uint8_t heading_fine_conv(uint16_t heading) {

	heading = ((heading * 10) + 113) % 3600;

	return (heading / 225);

}

/**

 * draw a compass rose at <x>/<y> for <heading>

 */

void draw_compass(uint8_t x, uint8_t y, uint16_t heading) {

    //char* rose = "---N---O---S---W---N---O---S---W---N---O---S---W";

    static char rose[48] PROGMEM = {216, 215, 216, 211, 216, 215, 216, 213, 216, 215, 216, 212,

                    216, 215, 216, 214, 216, 215, 216, 211, 216, 215, 216, 213,

                    216, 215, 216, 212, 216, 215, 216, 214, 216, 215, 216, 211,

                    216, 215, 216, 213, 216, 215, 216, 212, 216, 215, 216, 214};

	// the center is char 19 (north), we add the current heading in 8th

	// which would be 22.5 degrees, but float would bloat up the code

	// and *10 / 225 would take ages... so we take the uncorrect way

    uint8_t front = 19 + (heading / 22);

    for (uint8_t i = 0; i < 9; i++) {

		write_char_xy(x++, y, pgm_read_byte(&rose[front - 4 + i]));

    }

}

/* ##########################################################################

 * battery index

 * ##########################################################################*/

/**

 * draw a battery symbol at <x>/<y> according to <voltage>

 */

void draw_battery(uint8_t x, uint8_t y, uint8_t min_voltage, uint8_t voltage, uint8_t max_voltage) {

	uint8_t percent = (100* (voltage - min_voltage) / (max_voltage - min_voltage));

	if (percent > 100) percent = 100;

	if (voltage < min_voltage) percent = 0;

	write_char_xy(x, y, 0x9d - (percent * 13 / 100));

	//write_ndigit_number_u(x, y-1, percent * 13 / 100, 100, 0);

}

/* ##########################################################################

 * variometer

 * ##########################################################################*/

/**

 * draw variometer arrows at <x>/<y> according to <variometer>

 */

void draw_variometer(uint8_t x, uint8_t y, int16_t variometer) {

	if (variometer == 0) {

		write_char_xy(x, y, 0xbb); // plain line

	} else if (variometer > 0) { // gain height

		switch (variometer / 5){

			case 0:

				//write_char_xy(x, y, 0xba); // smallest arrow up

				write_char_xy(x, y, 0x70); // one arrow up

				break;

			case 1:

				//write_char_xy(x, y, 0xb9); // small arrow up

				write_char_xy(x, y, 0x71); // two arrows up

				break;

			case 2:

				//write_char_xy(x, y, 0xb8); // large arrow up

				write_char_xy(x, y, 0x72); // three arrows up

				break;

			default:

				//write_char_xy(x, y, 0xb7); // largest arrow up

				write_char_xy(x, y, 0x73); // three black arrows up

		}

	} else { // sink

		switch (variometer / -5){

			case 0:

				//write_char_xy(x, y, 0xbc); // smallest arrow down

				write_char_xy(x, y, 0x77); // one arrow down

				break;

			case 1:

				//write_char_xy(x, y, 0xbd); // small arrow down

				write_char_xy(x, y, 0x76); // two arrows down

				break;

			case 2:

				//write_char_xy(x, y, 0xbe); // large arrow down

				write_char_xy(x, y, 0x75); // three arrows down

				break;

			default:

				//write_char_xy(x, y, 0xbf); // largest arrow down

				write_char_xy(x, y, 0x74); // three black arrows down

		}

	}

}

// big vario arrays

const char vario_00[5] PROGMEM = {0x00, 0x00, 0xc2, 0xff, 0xff};

const char vario_01[5] PROGMEM = {0x00, 0x00, 0xc2, 0xff, 0xc0};

const char vario_02[5] PROGMEM = {0x00, 0x00, 0xc2, 0xff, 0xc1};

const char vario_03[5] PROGMEM = {0x00, 0x00, 0xc2, 0xff, 0x00};

const char vario_04[5] PROGMEM = {0x00, 0x00, 0xc2, 0xc0, 0x00};

const char vario_05[5] PROGMEM = {0x00, 0x00, 0xc2, 0xc1, 0x00};

const char vario_06[5] PROGMEM = {0x00, 0x00, 0xc2, 0x00, 0x00};

const char vario_07[5] PROGMEM = {0x00, 0x00, 0xbb, 0x00, 0x00};

const char vario_08[5] PROGMEM = {0x00, 0x00, 0xc3, 0x00, 0x00};

const char vario_09[5] PROGMEM = {0x00, 0xc4, 0xc3, 0x00, 0x00};

const char vario_10[5] PROGMEM = {0x00, 0xc5, 0xc3, 0x00, 0x00};

const char vario_11[5] PROGMEM = {0x00, 0xff, 0xc3, 0x00, 0x00};

const char vario_12[5] PROGMEM = {0xc4, 0xff, 0xc3, 0x00, 0x00};

const char vario_13[5] PROGMEM = {0xc5, 0xff, 0xc3, 0x00, 0x00};

const char vario_14[5] PROGMEM = {0xff, 0xff, 0xc3, 0x00, 0x00};

const char* vario_pnt[15] PROGMEM = {vario_00, vario_01, vario_02, vario_03, vario_04,

                                vario_05, vario_06, vario_07, vario_08,

                                vario_09, vario_10, vario_11, vario_12,

                                vario_13, vario_14};

/**

 * draw a bigger vario with middle at <x>/<y> acording to <variometer>

 */

void draw_big_variometer(uint8_t x, uint8_t y, int16_t variometer) {

	int16_t index = 7 + variometer;

	if (index > 14) index = 14;

	else if (index < 0) index = 0;

	write_string_pgm_down(x, y-2, (const char *) (pgm_read_word ( &(vario_pnt[index]))), 5);

}

/* ##########################################################################

 * NEW artificial horizon     By AGRESSiVA --=-- COPTERTRONiC

 * ##########################################################################*/

// draw routine

int draw_noodles(int8_t pos_x, int8_t pos_y, int8_t num, int8_t old_num) {

	char noodle[5] = {0x78, 0x79, 0x7A, 0x7B, 0x7C};

	int8_t line,car;

	line = num / 5;

	car = num - (line * 5);

	if (num != old_num) {

		write_char_xy(15 - pos_x , pos_y + (old_num), 0);

		}

	if (num < 0) {car = -1* car; car = 4 - car; line--; num = num - 5;}

	write_char_xy(15 - pos_x , pos_y + line, noodle[car]);

return line;

}

/**

 * calculate the rails of artificial horizon

 * receive <nick> and <roll> values

 */

void draw_agressiva_artificial_horizon(uint8_t firstline, uint8_t lastline, int16_t nick, int16_t roll) {

	static int8_t old_ticy = 1,old_ticx = 0;

	static int8_t old1 = 0,old2 = 0,old3 = 0,old4, old5 = 0, old6 = 0,old7 = 0,old8 = 0;

	int8_t ticy = 0, ticx = 0;

	uint8_t center_x = 15;

	uint8_t center_y = lastline - firstline;

	center_y = 7;

	write_char_xy(center_x - 7 ,center_y,226);

	write_char_xy(center_x + 6 ,center_y,226);

#if FCONLY

		ticy = -1*(roll / 10);	// rescale roll from FC debug data

		ticx = -1*(nick * 10);	// rescale nick from FC debug data

#else

		ticy = -1*(roll / 2);

		ticx = -1*(nick / 1);

#endif

if (ticy >= 30) ticy = 30;  // limit y

if (ticx >= 30) ticx = 30;	// limit x

	//write_ndigit_number_u (0 , 5 , ticy ,3, 1);

	//write_ndigit_number_u (0 , 6 , ticx ,3, 1);

	if ((ticy != old_ticy) || (ticx != old_ticx)) {

			old1 = draw_noodles(   4, 3,  (ticy /  2) + 20 + ticx, old1);

			old2 = draw_noodles(   3, 3,  (ticy /  3) + 20 + ticx, old2);

			old3 = draw_noodles(   2, 3,  (ticy /  6) + 20 + ticx, old3);

			old4 = draw_noodles(   1, 3,  (ticy / 14) + 20 + ticx, old4);

			old5 = draw_noodles( - 3, 3, -(ticy /  2) + 20 + ticx, old5);

			old6 = draw_noodles( - 2, 3, -(ticy /  3) + 20 + ticx, old6);

			old7 = draw_noodles( - 1, 3, -(ticy /  6) + 20 + ticx, old7);

			old8 = draw_noodles(   0, 3, -(ticy / 14) + 20 + ticx, old8);

			}

	// update old vars

	old_ticy = ticy;

	old_ticx = ticx;

}

/* ##########################################################################

 * OLD artificial horizon

 * ##########################################################################*/

// remember last time displayed values

int8_t old_af_x = -1, old_af_y = -1;

/**

 * draw roll und nick indicators (could be enhanced to full artificial horizon)

 * from line <firstline> to <listlines> for given <nick> and <roll> values

 */

void draw_artificial_horizon(uint8_t firstline, uint8_t lastline, int16_t nick, int16_t roll) {

	char noodle[5] = {225, 225, 226, 227, 227};

	uint8_t center_x = 15;

	uint8_t center_y = lastline - firstline;

	center_y = 7;

	write_char_xy(center_x,center_y,228);

	uint8_t cpos, nicky, rollx;

	// which line

	int8_t ypos =  nick / 20;

	// which character from the array?

	if (nick < 0) {

		cpos = -1*((nick - (ypos * 20))/4);

		ypos--;

	} else cpos = 4-((nick - (ypos * 20))/4);

	if (cpos > 4) cpos = 4;

	nicky = center_y - ypos;

	if (nicky > lastline) nicky = lastline;

	else if (nicky < firstline) nicky = firstline;

	// ensure roll-borders

	rollx = (roll / 8)+15;

	if (rollx < 2) rollx = 2;

	else if (rollx > 28) rollx = 28;

	// clear roll

	if (old_af_x != rollx && old_af_x >= 0) {

		write_char_xy(old_af_x, lastline, 0);

	}

	// clear nick

	if (old_af_y != nicky && old_af_y >= 0) {

		write_char_xy(center_x-1, old_af_y, 0);

		write_char_xy(center_x+1, old_af_y, 0);

	}

	// draw nick

	write_char_xy(center_x-1, nicky, noodle[cpos]);

	write_char_xy(center_x+1, nicky, noodle[cpos]);

	// draw roll

	write_char_xy(rollx, lastline, 229);

	// update old vars

	old_af_x = rollx;

	old_af_y = nicky;

}

#endif