content: /*
   * SoulFire
   * Copyright (C) 2024  AlexProgrammerDE
   *
   * 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 3 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, see <https://www.gnu.org/licenses/>.
   */
  package com.soulfiremc.server.pathfinding.controller;
  
  import com.soulfiremc.server.bot.BotConnection;
  import com.soulfiremc.server.pathfinding.SFVec3i;
  import com.soulfiremc.server.pathfinding.execution.PathExecutor;
  import com.soulfiremc.server.pathfinding.goals.BreakBlockPosGoal;
  import com.soulfiremc.server.pathfinding.goals.CompositeGoal;
  import com.soulfiremc.server.pathfinding.graph.PathConstraint;
  import lombok.RequiredArgsConstructor;
  import lombok.extern.slf4j.Slf4j;
  import net.minecraft.world.level.block.AirBlock;
  import net.minecraft.world.level.block.Block;
  import net.minecraft.world.level.block.state.BlockState;
  
  import java.util.HashSet;
  import java.util.Set;
  import java.util.function.Predicate;
  import java.util.stream.Collectors;
  
  @Slf4j
  @RequiredArgsConstructor
  public final class CollectBlockController {
    private final Predicate<Block> blockTypeChecker;
    private final int requestedAmount;
    private final int maxRadius;
    private int collectedAmount;
  
    public static Set<SFVec3i> searchWithinRadius(BotConnection botConnection, Predicate<BlockState> checker, int radius) {
      var clientEntity = botConnection.minecraft().player;
      var level = botConnection.minecraft().level;
      var rootPosition = SFVec3i.fromInt(clientEntity.blockPosition());
  
      var minY = Math.max(level.getMinY(), rootPosition.y - radius);
      var maxY = Math.min(level.getMaxY(), rootPosition.y + radius);
      var list = new HashSet<SFVec3i>();
      for (var x = -radius; x <= radius; x++) {
        for (var z = -radius; z <= radius; z++) {
          var blockX = rootPosition.x + x;
          var blockZ = rootPosition.z + z;
          for (var y = minY; y <= maxY; y++) {
            var blockPos = new SFVec3i(blockX, y, blockZ);
            var blockState = level.getBlockState(blockPos.toBlockPos());
            if (!(blockState.getBlock() instanceof AirBlock) && checker.test(blockState)) {
              list.add(blockPos);
            }
          }
        }
      }
  
      return list;
    }
  
    public void start(BotConnection bot) {
      while (collectedAmount < requestedAmount) {
        log.info("Collecting block {}/{}", collectedAmount, requestedAmount);
  
        log.info("Searching for block within radius {}", maxRadius);
        var blockPos = searchWithinRadius(bot, blockState -> blockTypeChecker.test(blockState.getBlock()), maxRadius);
  
        if (blockPos.isEmpty()) {
          throw new IllegalStateException("Could not find matching block within radius " + maxRadius);
        }
  
        log.info("Found {} possible blocks to collect", blockPos.size());
  
        try {
          PathExecutor.executePathfinding(bot, new CompositeGoal(blockPos.stream().map(BreakBlockPosGoal::new).collect(Collectors.toUnmodifiableSet())), new PathConstraint(bot)).get();
          collectedAmount++;
        } catch (Exception e) {
          log.error("Got exception while executing path, aborting", e);
          return;
        }
      }
    }
  }
  