/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1984. */

#include "mklev.h"
extern struct monst *makemon();
extern coord mazexy();

makemaz()
{
	int x,y;
	register int zx,zy;
	coord mm;

	for(x = 2; x < COLNO-1; x++)
		for(y = 2; y < ROWNO-1; y++)
			levl[x][y].typ = (x%2 && y%2) ? 0 : HWALL;
	mm = mazexy();
	zx = mm.x;
	zy = mm.y;
	walkfrom(zx,zy);
	mkobj_at(AMULET_SYM, zx, zy);
	mkobj_at(ROCK_SYM, zx, zy);	/* put a rock on top of the amulet */
	/* (probably this means that one needs a wand of digging to reach 
	    the amulet - we must make sure that the player has a chance of
	    getting one; let us say when he kills the minotaur; of course
	    the minotaur itself may be blocked behind rocks, but well...) */
	for(x = 2; x < COLNO-1; x++)
		for(y = 2; y < ROWNO-1; y++) {
			switch(levl[x][y].typ) {
			case HWALL:
				levl[x][y].scrsym = '-';
				break;
			case ROOM:
				levl[x][y].scrsym = '.';
				break;
			}
		}
	for(x = rn1(8,11); x; x--) {
		mm = mazexy();
		mkobj_at(0, mm.x, mm.y);
	}
	for(x = rn1(10,2); x; x--) {
		mm = mazexy();
		mkobj_at(ROCK_SYM, mm.x, mm.y);
	}
	mm = mazexy();
	(void) makemon(PM_MINOTAUR, mm.x, mm.y);
	for(x = rn1(5,7); x; x--) {
		mm = mazexy();
		(void) makemon((struct permonst *) 0, mm.x, mm.y);
	}
	for(x = rn1(6,7); x; x--) {
		mm = mazexy();
		mkgold(0,mm.x,mm.y);
	}
	for(x = rn1(6,7); x; x--)
		mktrap(0,1);
	mm = mazexy();
	levl[(xupstair = mm.x)][(yupstair = mm.y)].scrsym = '<';
	levl[xupstair][yupstair].typ = STAIRS;
	xdnstair = ydnstair = 0;
}

walkfrom(x,y) int x,y; {
register int q,a,dir;
int dirs[4];
	levl[x][y].typ = ROOM;
	while(1) {
		q = 0;
		for(a = 0; a < 4; a++)
			if(okay(x,y,a)) dirs[q++]= a;
		if(!q) return;
		dir = dirs[rn2(q)];
		move(&x,&y,dir);
		levl[x][y].typ = ROOM;
		move(&x,&y,dir);
		walkfrom(x,y);
	}
}

move(x,y,dir)
register int *x, *y;
register int dir;
{
	switch(dir){
		case 0: --(*y); break;
		case 1: (*x)++; break;
		case 2: (*y)++; break;
		case 3: --(*x); break;
	}
}

okay(x,y,dir)
int x,y;
register int dir;
{
	move(&x,&y,dir);
	move(&x,&y,dir);
	if(x<3 || y<3 || x>COLNO-3 || y>ROWNO-3 || levl[x][y].typ != 0)
		return(0);
	else
		return(1);
}

coord
mazexy(){
	coord mm;
	mm.x = 3 + 2*rn2(COLNO/2 - 2);
	mm.y = 3 + 2*rn2(ROWNO/2 - 2);
	return mm;
}