/*
 * Decompiled with CFR 0.152.
 */
package net.minecraft.world.level.levelgen;

import net.minecraft.core.BlockPos;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.util.RandomSource;
import net.minecraft.world.attribute.EnvironmentAttributes;
import net.minecraft.world.entity.EntitySpawnReason;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.entity.monster.PatrollingMonster;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.level.CustomSpawner;
import net.minecraft.world.level.NaturalSpawner;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.gamerules.GameRules;
import net.minecraft.world.level.levelgen.Heightmap;

public class PatrolSpawner
implements CustomSpawner {
    private int nextTick;

    @Override
    public void tick(ServerLevel level, boolean spawnEnemies) {
        if (!spawnEnemies) {
            return;
        }
        if (!level.getGameRules().get(GameRules.SPAWN_PATROLS).booleanValue()) {
            return;
        }
        RandomSource random = level.random;
        --this.nextTick;
        if (this.nextTick > 0) {
            return;
        }
        this.nextTick += 12000 + random.nextInt(1200);
        if (!level.isBrightOutside()) {
            return;
        }
        if (random.nextInt(5) != 0) {
            return;
        }
        int playerCount = level.players().size();
        if (playerCount < 1) {
            return;
        }
        Player player = level.players().get(random.nextInt(playerCount));
        if (player.isSpectator()) {
            return;
        }
        if (level.isCloseToVillage(player.blockPosition(), 2)) {
            return;
        }
        int x = (24 + random.nextInt(24)) * (random.nextBoolean() ? -1 : 1);
        int z = (24 + random.nextInt(24)) * (random.nextBoolean() ? -1 : 1);
        BlockPos.MutableBlockPos spawnPos = player.blockPosition().mutable().move(x, 0, z);
        int delta = 10;
        if (!level.hasChunksAt(spawnPos.getX() - 10, spawnPos.getZ() - 10, spawnPos.getX() + 10, spawnPos.getZ() + 10)) {
            return;
        }
        if (!level.environmentAttributes().getValue(EnvironmentAttributes.CAN_PILLAGER_PATROL_SPAWN, spawnPos).booleanValue()) {
            return;
        }
        int groupSize = (int)Math.ceil(level.getCurrentDifficultyAt(spawnPos).getEffectiveDifficulty()) + 1;
        for (int i = 0; i < groupSize; ++i) {
            spawnPos.setY(level.getHeightmapPos(Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, spawnPos).getY());
            if (i == 0) {
                if (!this.spawnPatrolMember(level, spawnPos, random, true)) {
                    break;
                }
            } else {
                this.spawnPatrolMember(level, spawnPos, random, false);
            }
            spawnPos.setX(spawnPos.getX() + random.nextInt(5) - random.nextInt(5));
            spawnPos.setZ(spawnPos.getZ() + random.nextInt(5) - random.nextInt(5));
        }
    }

    private boolean spawnPatrolMember(ServerLevel level, BlockPos pos, RandomSource random, boolean isLeader) {
        BlockState state = level.getBlockState(pos);
        if (!NaturalSpawner.isValidEmptySpawnBlock(level, pos, state, state.getFluidState(), EntityType.PILLAGER)) {
            return false;
        }
        if (!PatrollingMonster.checkPatrollingMonsterSpawnRules(EntityType.PILLAGER, level, EntitySpawnReason.PATROL, pos, random)) {
            return false;
        }
        PatrollingMonster mob = EntityType.PILLAGER.create(level, EntitySpawnReason.PATROL);
        if (mob != null) {
            if (isLeader) {
                mob.setPatrolLeader(true);
                mob.findPatrolTarget();
            }
            mob.setPos(pos.getX(), pos.getY(), pos.getZ());
            mob.finalizeSpawn(level, level.getCurrentDifficultyAt(pos), EntitySpawnReason.PATROL, null);
            level.addFreshEntityWithPassengers(mob);
            return true;
        }
        return false;
    }
}