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package net.minecraft.server;
import java.util.Random;
// CraftBukkit start
import org.bukkit.BlockFace;
import org.bukkit.craftbukkit.CraftBlock;
import org.bukkit.event.Event.Type;
import org.bukkit.event.block.BlockFromToEvent;
// CraftBukkit end
public class BlockFlowing extends BlockFluids {
int a;
boolean b[];
int c[];
protected BlockFlowing(int i1, Material material) {
super(i1, material);
a = 0;
b = new boolean[4];
c = new int[4];
}
private void i(World world, int i1, int j1, int k1) {
int l1 = world.b(i1, j1, k1);
world.a(i1, j1, k1, bh + 1, l1);
world.b(i1, j1, k1, i1, j1, k1);
world.g(i1, j1, k1);
}
public void a(World world, int i1, int j1, int k1, Random random) {
int l1 = g(world, i1, j1, k1);
byte byte0 = 1;
if (bs == Material.g && !world.q.d) {
byte0 = 2;
}
boolean flag = true;
if (l1 > 0) {
int i2 = -100;
a = 0;
i2 = e(world, i1 - 1, j1, k1, i2);
i2 = e(world, i1 + 1, j1, k1, i2);
i2 = e(world, i1, j1, k1 - 1, i2);
i2 = e(world, i1, j1, k1 + 1, i2);
int j2 = i2 + byte0;
if (j2 >= 8 || i2 < 0) {
j2 = -1;
}
if (g(world, i1, j1 + 1, k1) >= 0) {
int l2 = g(world, i1, j1 + 1, k1);
if (l2 >= 8) {
j2 = l2;
} else {
j2 = l2 + 8;
}
}
if (a >= 2 && bs == Material.f) {
if (world.d(i1, j1 - 1, k1)) {
j2 = 0;
} else if (world.c(i1, j1 - 1, k1) == bs && world.b(i1, j1, k1) == 0) {
j2 = 0;
}
}
if (bs == Material.g && l1 < 8 && j2 < 8 && j2 > l1 && random.nextInt(4) != 0) {
j2 = l1;
flag = false;
}
if (j2 != l1) {
l1 = j2;
if (l1 < 0) {
world.d(i1, j1, k1, 0);
} else {
world.b(i1, j1, k1, l1);
world.h(i1, j1, k1, bh);
world.g(i1, j1, k1, bh);
}
} else if (flag) {
i(world, i1, j1, k1);
}
} else {
i(world, i1, j1, k1);
}
// CraftBukkit start
CraftBlock source = (CraftBlock) ((WorldServer) world).getWorld().getBlockAt(i1, j1, k1);
if (l(world, i1, j1 - 1, k1)) {
// Craftbucket send "down" to the server
BlockFromToEvent blockFlow = new BlockFromToEvent(Type.BLOCK_FLOW, source, BlockFace.Down);
((WorldServer) world).getServer().getPluginManager().callEvent(blockFlow);
if (!blockFlow.isCancelled()) {
if (l1 >= 8) {
world.b(i1, j1 - 1, k1, bh, l1);
} else {
world.b(i1, j1 - 1, k1, bh, l1 + 8);
}
}
// CraftBukkit end
} else if (l1 >= 0 && (l1 == 0 || k(world, i1, j1 - 1, k1))) {
boolean aflag[] = j(world, i1, j1, k1);
int k2 = l1 + byte0;
if (l1 >= 8) {
k2 = 1;
}
if (k2 >= 8) {
return;
}
// CraftBukkit start - all four cardinal directions. Do not change the order!
BlockFace[] faces = new BlockFace[]{ BlockFace.North, BlockFace.South, BlockFace.East, BlockFace.West };
int index = 0;
for (BlockFace currentFace: faces) {
if (aflag[index]) {
BlockFromToEvent event = new BlockFromToEvent(Type.BLOCK_FLOW, source, currentFace);
((WorldServer) world).getServer().getPluginManager().callEvent(event);
if (!event.isCancelled()) {
f(world, i1 + currentFace.getModX(), j1, k1 + currentFace.getModZ(), k2);
}
}
index++;
}
// CraftBukkit end
}
}
private void f(World world, int i1, int j1, int k1, int l1) {
if (l(world, i1, j1, k1)) {
int i2 = world.a(i1, j1, k1);
if (i2 > 0) {
if (bs == Material.g) {
h(world, i1, j1, k1);
} else {
Block.m[i2].a_(world, i1, j1, k1, world.b(i1, j1, k1));
}
}
world.b(i1, j1, k1, bh, l1);
}
}
private int a(World world, int i1, int j1, int k1, int l1, int i2) {
int j2 = 1000;
for (int k2 = 0; k2 < 4; k2++) {
if (k2 == 0 && i2 == 1 || k2 == 1 && i2 == 0 || k2 == 2 && i2 == 3 || k2 == 3 && i2 == 2) {
continue;
}
int l2 = i1;
int i3 = j1;
int j3 = k1;
if (k2 == 0) {
l2--;
}
if (k2 == 1) {
l2++;
}
if (k2 == 2) {
j3--;
}
if (k2 == 3) {
j3++;
}
if (k(world, l2, i3, j3) || world.c(l2, i3, j3) == bs && world.b(l2, i3, j3) == 0) {
continue;
}
if (!k(world, l2, i3 - 1, j3)) {
return l1;
}
if (l1 >= 4) {
continue;
}
int k3 = a(world, l2, i3, j3, l1 + 1, k2);
if (k3 < j2) {
j2 = k3;
}
}
return j2;
}
private boolean[] j(World world, int i1, int j1, int k1) {
for (int l1 = 0; l1 < 4; l1++) {
c[l1] = 1000;
int j2 = i1;
int i3 = j1;
int j3 = k1;
if (l1 == 0) {
j2--;
}
if (l1 == 1) {
j2++;
}
if (l1 == 2) {
j3--;
}
if (l1 == 3) {
j3++;
}
if (k(world, j2, i3, j3) || world.c(j2, i3, j3) == bs && world.b(j2, i3, j3) == 0) {
continue;
}
if (!k(world, j2, i3 - 1, j3)) {
c[l1] = 0;
} else {
c[l1] = a(world, j2, i3, j3, 1, l1);
}
}
int i2 = c[0];
for (int k2 = 1; k2 < 4; k2++) {
if (c[k2] < i2) {
i2 = c[k2];
}
}
for (int l2 = 0; l2 < 4; l2++) {
b[l2] = c[l2] == i2;
}
return b;
}
private boolean k(World world, int i1, int j1, int k1) {
int l1 = world.a(i1, j1, k1);
if (l1 == Block.aE.bh || l1 == Block.aL.bh || l1 == Block.aD.bh || l1 == Block.aF.bh || l1 == Block.aX.bh) {
return true;
}
if (l1 == 0) {
return false;
}
Material material = Block.m[l1].bs;
return material.a();
}
protected int e(World world, int i1, int j1, int k1, int l1) {
int i2 = g(world, i1, j1, k1);
if (i2 < 0) {
return l1;
}
if (i2 == 0) {
a++;
}
if (i2 >= 8) {
i2 = 0;
}
return l1 >= 0 && i2 >= l1 ? l1 : i2;
}
private boolean l(World world, int i1, int j1, int k1) {
Material material = world.c(i1, j1, k1);
if (material == bs) {
return false;
}
if (material == Material.g) {
return false;
} else {
return !k(world, i1, j1, k1);
}
}
public void e(World world, int i1, int j1, int k1) {
super.e(world, i1, j1, k1);
if (world.a(i1, j1, k1) == bh) {
world.h(i1, j1, k1, bh);
}
}
}
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