// ==================== ХРАНИЛИЩЕ МИРА 3D — GrechkaCraft v3 ====================
// Ключ блока: "x,y,z". Единый источник для рендера, физики, сети и сейвов.
// Мир по всем трём осям: X — вперёд, Y — вверх, Z — вбок (глубина мира).
import { BLOCKS } from '../data/blocks.js';
import { state } from '../core/state.js';

const grid = state.grid;   // Map: "x,y,z" => { gx, gy, gz, t, dead }
const blocks = state.blocks; // Array для перебора/рендера

function k3(gx, gy, gz) { return gx + ',' + gy + ',' + gz; }

function getBlock(gx, gy, gz) {
  const b = grid.get(k3(gx, gy, gz));
  if (b && b.dead) return null;
  return b || null;
}

function hasBlock(gx, gy, gz) { return grid.has(k3(gx, gy, gz)); }

function isSolid(gx, gy, gz) {
  const b = getBlock(gx, gy, gz);
  if (!b) return false;
  const def = BLOCKS[b.t];
  return !!def.solid && !def.fluid && !def.decor && !def.climbable;
}

// Непрозрачный ли блок (для отсечения внутренних граней не используется — мы рендерим кубы)
function isOpaque(gx, gy, gz) {
  const b = getBlock(gx, gy, gz);
  if (!b) return false;
  const def = BLOCKS[b.t];
  return !!def.solid && !def.fluid && !def.decor && !def.climbable;
}

function setBlock(gx, gy, gz, t, isPlayerPlaced = false) {
  const key = k3(gx, gy, gz);
  if (grid.has(key)) return false;
  const b = { gx, gy, gz, t, dead: false, active: false, fuse: 0 };
  grid.set(key, b);
  blocks.push(b);
  if (isPlayerPlaced) {
    state.placedBlocks.push({ gx, gy, gz, t });
  }
  state.blocksVersion = (state.blocksVersion || 0) + 1;
  return true;
}

function removeBlock(gx, gy, gz) {
  const key = k3(gx, gy, gz);
  const b = grid.get(key);
  if (!b) return null;
  if (BLOCKS[b.t].unbreakable) return null;
  grid.delete(key);
  b.dead = true;
  const wasPlayerPlaced = state.placedBlocks.some(pb => pb.gx === gx && pb.gy === gy && pb.gz === gz);
  if (wasPlayerPlaced) {
    state.placedBlocks = state.placedBlocks.filter(pb => !(pb.gx === gx && pb.gy === gy && pb.gz === gz));
  } else {
    state.removedBlocks.push({ gx, gy, gz });
  }
  state.blocksVersion = (state.blocksVersion || 0) + 1;
  return b;
}

export { grid, blocks, k3, getBlock, hasBlock, isSolid, isOpaque, setBlock, removeBlock };