import { expect } from "@esm-bundle/chai";
import { VoxelGrid } from "../../src/grid/VoxelGrid.js";
import { CrystalSpiresGenerator } from "../../src/generation/CrystalSpiresGenerator.js";

describe("System: Procedural Generation (Crystal Spires)", () => {
  let grid;

  beforeEach(() => {
    // Taller grid for verticality
    grid = new VoxelGrid(20, 15, 20);
  });

  it("CoA 1: Should generate vertical columns (Spires)", () => {
    const gen = new CrystalSpiresGenerator(grid, 12345);
    gen.generate(1, 0); // 1 Spire, 0 Islands

    // Check if the spire goes from bottom to top
    // Finding a solid column
    let solidColumnFound = false;

    // Scan roughly center
    for (let x = 5; x < 15; x++) {
      for (let z = 5; z < 15; z++) {
        if (grid.getCell(x, 0, z) !== 0 && grid.getCell(x, 14, z) !== 0) {
          solidColumnFound = true;
          break;
        }
      }
    }

    expect(solidColumnFound).to.be.true;
  });

  it("CoA 2: Should generate floating islands with void below", () => {
    const gen = new CrystalSpiresGenerator(grid, 999);
    gen.generate(0, 5); // 0 Spires, 5 Islands

    let floatingIslandFound = false;

    for (let x = 0; x < 20; x++) {
      for (let z = 0; z < 20; z++) {
        for (let y = 5; y < 10; y++) {
          // Look for Solid block with Air directly below it
          if (grid.getCell(x, y, z) !== 0 && grid.getCell(x, y - 1, z) === 0) {
            floatingIslandFound = true;
          }
        }
      }
    }

    expect(floatingIslandFound).to.be.true;
  });

  it("CoA 3: Should generate bridges (ID 20)", () => {
    const gen = new CrystalSpiresGenerator(grid, 12345);
    gen.generate(2, 5); // Spires and Islands

    let bridgeCount = 0;
    for (let i = 0; i < grid.cells.length; i++) {
      if (grid.cells[i] === 20) bridgeCount++;
    }

    expect(bridgeCount).to.be.greaterThan(0);
  });
});