/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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, 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; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

/*
 * This code is based on the original source code of Lord Avalot d'Argent version 1.3.
 * Copyright (c) 1994-1995 Mike, Mark and Thomas Thurman.
 */

/*
  ÛßÜ ÛßÜ ÜßßÜ  ßÛß Ûßß  Üß ßÛß      ÜßÛßÜ  ßÛß ÛÜ  Û ÜÛßß  ßÛß ÛßÜ Ûßß Û
  Ûß  ÛÛ  Û  Û Ü Û  Ûßß ßÜ   Û      Û  Û  Û  Û  Û ÛÜÛ  ßßßÜ  Û  ÛÛ  Ûßß Û
  ß   ß ß  ßß   ßß  ßßß   ß  ß      ß  ß  ß ßßß ß  ßß  ßßß   ß  ß ß ßßß ßßß

                 TRIP             The trippancy handler. (Trippancy 2) */

#define __trip_implementation__


#include "trip.h"


#include "graph.h"
#include "gyro.h"
/*#include "Dos.h"*/

namespace Avalanche {

/*                                                                              */
/*       EGA Graphic Primitive for Turbo Pascal 3.01A, Version 01FEB86.         */
/*       (C) 1986 by Kent Cedola, 2015 Meadow Lake Ct., Norfolk, VA, 23518      */
/*                                                                              */
/*       Description: Write a array of colors in a vertical line.  The current  */
/*       merge setting is used to control the combining of bits.                */
/*                                                                              */
void gpwtcol(void *buf, integer n) {    /* Cedola */
	;     /*
   inline
     ($1E/$A1/GDCUR_Y/$D1/$E0/$D1/$E0/$03/$06/GDCUR_Y/$05/$A000/$8E/$C0/$8B/$3E/
      GDCUR_X/$8B/$CF/$D1/$EF/$D1/$EF/$D1/$EF/$BA/$03CE/$8A/$26/GDMERGE/$B0/$03/
      $EF/$B8/$0205/$EF/$B0/$08/$EE/$42/$B0/$80/$80/$E1/$07/$D2/$C8/$EE/$8B/$4E/
      $04/$C5/$76/$06/$8A/$24/$46/$26/$8A/$1D/$26/$88/$25/$83/$C7/$50/$E2/$F2/
      $B0/$FF/$EE/$4A/$B8/>$05/$EF/$B8/>$03/$EF/$1F); */
}


void loadtrip() {
	untyped_file inf;
	assign(inf, "t:avvy.trp");
	reset(inf, 1);
	seek(inf, 0x27);
	blockread(inf, pozzes, sizeof(pozzes));
	blockread(inf, blue3, sizeof(blue3));
	close(inf);
}

void plot(word count, integer ox, integer oy) { /* orig x & y. Page is always 1. */
	byte x, y, len;
	do {
		len = blue3[count];
		if (len == 177)  return;
		x = blue3[count + 1];
		y = blue3[count + 2];
		count += 3;
		{
			gdcur_x = x + ox;
			gdcur_y = y + oy;
			/* fiddle xy coords to match page 1 */
			gdcur_y += 205;   /* 203 */ gdcur_x -= 128; /* 114 */
			if (gdcur_x < 0) {
				gdcur_x += 640;
				gdcur_y -= 1;
			}
			gpwtcol(&blue3[count], len);
			count += len;
		}
	} while (!false);
}

void boundscheck() {
	if (dna.uy > 123)  dna.uy = 123;
	if (dna.uy < 10)  dna.uy = 10;
	if (dna.ux < 5)  dna.ux = 5;
	if (dna.ux > 600)  dna.ux = 600;
}

void budge() {
	if (set::of(up, ul, ur, eos).has(dna.rw))  dna.uy -= 3;
	if (set::of(down, dl, dr, eos).has(dna.rw))  dna.uy += 3;
	if (set::of(left, ul, dl, eos).has(dna.rw))  dna.ux -= 5;
	if (set::of(right, ur, dr, eos).has(dna.rw))  dna.ux += 5;

	boundscheck();

	if (dna.rw > 0) {
		anim += 1;
		if (anim == 7)  anim = 1;
	}
}

void tripkey(char dir) {
	if (cw != 177)  return;
	{
		dnatype &with = dna;
		switch (dir) {
		case 'H':
			if (with.rw != up)     {
				with.rw = up;
				ww = up;
			} else with.rw = 0;
			break;
		case 'P':
			if (with.rw != down)   {
				with.rw = down;
				ww = down;
			} else with.rw = 0;
			break;
		case 'K':
			if (with.rw != left)   {
				with.rw = left;
				ww = left;
			} else with.rw = 0;
			break;
		case 'M':
			if (with.rw != right)  {
				with.rw = right;
				ww = right;
			} else with.rw = 0;
			break;
		case 'I':
			if (with.rw != ur)     {
				with.rw = ur;
				ww = right;
			} else with.rw = 0;
			break;
		case 'Q':
			if (with.rw != dr)     {
				with.rw = dr;
				ww = right;
			} else with.rw = 0;
			break;
		case 'O':
			if (with.rw != dl)     {
				with.rw = dl;
				ww = left;
			} else with.rw = 0;
			break;
		case 'G':
			if (with.rw != ul)     {
				with.rw = ul;
				ww = left;
			} else with.rw = 0;
			break;
		}
		if (with.rw == 0) {
			ux = ppos[0][0];
			uy = ppos[0][1];
			anim -= 1;
			if (anim == 0)  anim = 6;
		}
	}
}

void trippancy() {
	if ((dna.rw == 0) || (cw != 177) || (! dropsok))  return;
	r.ax = 11;
	intr(0x33, r);
	setactivepage(1);
	off();
	if (ppos[0][1] != -177) {
		putimage(ppos[0][0], ppos[0][1], replace[0], 0);
	}

	getimage(dna.ux, dna.uy, dna.ux + xw, dna.uy + yw, replace[0]);
	ppos[0][0] = dna.ux;
	ppos[0][1] = dna.uy;

	plot(pozzes[anim * 4 + dna.ww - 4], dna.ux, dna.uy);

	{
		void &with = r;
		if ((cx == 0) && (dx == 0))  on();
	}
	getimage(dna.ux - margin, dna.uy - margin, dna.ux + xw + margin, dna.uy + yw + margin, copier);
	setactivepage(0);
	off();
	putimage(dna.ux - margin, dna.uy - margin, copier, 0);
	on();

	{
		void &with = mouths[0];  ;
		x = dna.ux + 20;
		y = dna.uy;
	}

	budge();
}

} // End of namespace Avalanche.