package th;
import java.lang.Math;
class SpanningRegion extends Region {
    public static String name = "Open Pipe";
    public static String description = "The tunnel dead-ends with a large open"
	+ " steam pipe leading away\ninto darkness.";
    public static String color = Ifc.BRIGHT_BLUE;
    private static Class SpanningTunnel = Utl.gclass("SpanningTunnel");
    public SpanningRegion (Node start, int region) {
	super(start, region);
    }
    public void generate (Node origin, int region, int direction) {
	origin.name = name;
	origin.description = description;
	origin.color = color;
	origin.unique = false;
	Node destination = (Node)Utl.rn(g.deadends);
	g.deadends.remove((Object)destination);
	destination = new Region_Bridge(destination);
	int xdist = origin.x - destination.x;
	int ydist = origin.y - destination.y;
	int phase = 0; int curdir = direction;
	int direc1 = -1; int direc2 = -1;
		
	if (ydist <= 0) direc1 = 1;
	else direc1 = 0;
	if (xdist <= 0) direc2 = 3;
	else direc2 = 2;
	//if (direction == direc1) {
	//phase = 1; curdir = direc1;
	//}
	//else if (direction == direc2) {
	//phase = direc2; direc2 = direc1;
	//direc1 = curdir = phase; phase = 1;
	//}
	xdist = Math.abs(xdist); ydist = Math.abs(ydist);
	if (xdist == ydist)
	    xdist = ydist = (xdist / 3) + 1;
	else if (xdist < ydist) {
	    int ratio = (ydist / (xdist + 1)) + 1;
	    xdist = (xdist / 3) + 1;
	    ydist = xdist * ratio;
	} else if (ydist < xdist) {
	    int ratio = (xdist / (ydist + 1)) + 1;
	    ydist = (Math.abs(ydist) / 3) + 1;
	    xdist = ydist * ratio;
	}
	Node oldnode = origin; Node newnode = null;
	while (xdist + ydist > 0) {
	    newnode = (Node)Utl.newInstance(SpanningTunnel);
	    newnode.region = region;
	    Map.makelink(newnode, oldnode, curdir);
	    if (curdir > 1) --xdist;
	    else --ydist;
	    if (phase == 0) {
		if (curdir > 1) curdir = direc1; 
		else curdir = direc2;
		phase = 1;
	    } else if (phase == 1) {
		if (Utl.rn() && xdist > 0)
		    curdir = direc2;
		else if (ydist > 0)
		    curdir = direc1;
		else
		    curdir = direc2;
	    }
	    oldnode = newnode;
	}
	if ((curdir == 0 && destination.south != null)
	    || (curdir == 1 && destination.north != null))
	    curdir = Math.max(direc1, direc2);
	else if ((curdir == 2 && destination.east != null)
		 || (curdir == 3 && destination.west != null))
	    curdir = Math.min(direc1, direc2);
	Map.makelink(destination, newnode, curdir);
	destination.name = name;
	destination.description = description;
	destination.color = color;
	destination.unique = false;
    }
}

class SpanningTunnel extends Node {
    public SpanningTunnel() {
	super();
	color = Ifc.BLUE;
	description = "The pipe stretches on in front of and behind you.";
	name = "Steam Tunnel";
	tunnel = true;
	if (Utl.rn())
	    add(Utl.rn(Species.span_spawn).make());
		
    }
}