rogue/src/engine/__tests__/world.test.ts

import { describe, it, expect } from 'vitest';
import { idx, inBounds, isWall, isBlocked, tryDestructTile } from '../world/world-logic';
import { type World, type Tile } from '../../core/types';
import { TileType } from '../../core/terrain';


describe('World Utilities', () => {
  const createTestWorld = (width: number, height: number, tiles: Tile[]): World => ({
    width,
    height,
    tiles,
    exit: { x: 0, y: 0 },
    trackPath: []
  });

  describe('idx', () => {
    it('should calculate correct index for 2D coordinates', () => {
      const world = createTestWorld(10, 10, []);

      expect(idx(world, 0, 0)).toBe(0);
      expect(idx(world, 5, 0)).toBe(5);
      expect(idx(world, 0, 1)).toBe(10);
      expect(idx(world, 5, 3)).toBe(35);
    });
  });

  describe('inBounds', () => {
    it('should return true for coordinates within bounds', () => {
      const world = createTestWorld(10, 10, []);

      expect(inBounds(world, 0, 0)).toBe(true);
      expect(inBounds(world, 5, 5)).toBe(true);
      expect(inBounds(world, 9, 9)).toBe(true);
    });

    it('should return false for coordinates outside bounds', () => {
      const world = createTestWorld(10, 10, []);

      expect(inBounds(world, -1, 0)).toBe(false);
      expect(inBounds(world, 0, -1)).toBe(false);
      expect(inBounds(world, 10, 0)).toBe(false);
      expect(inBounds(world, 0, 10)).toBe(false);
      expect(inBounds(world, 11, 11)).toBe(false);
    });
  });

  describe('isWall', () => {
    it('should return true for wall tiles', () => {
      const tiles: Tile[] = new Array(100).fill(TileType.EMPTY);
      tiles[0] = TileType.WALL; // wall at 0,0
      tiles[55] = TileType.WALL; // wall at 5,5


      const world = createTestWorld(10, 10, tiles);

      expect(isWall(world, 0, 0)).toBe(true);
      expect(isWall(world, 5, 5)).toBe(true);
    });

    it('should return false for floor tiles', () => {
      const tiles: Tile[] = new Array(100).fill(TileType.EMPTY);
      const world = createTestWorld(10, 10, tiles);

      expect(isWall(world, 3, 3)).toBe(false);
      expect(isWall(world, 7, 7)).toBe(false);

    });

    it('should return false for out of bounds coordinates', () => {
      const world = createTestWorld(10, 10, new Array(100).fill(0));

      expect(isWall(world, -1, 0)).toBe(false);
      expect(isWall(world, 10, 10)).toBe(false);
    });
  });

  describe('isBlocked', () => {
    it('should return true for walls', () => {
      const tiles: Tile[] = new Array(100).fill(TileType.EMPTY);
      tiles[55] = TileType.WALL; // wall at 5,5


      const world = createTestWorld(10, 10, tiles);
      const mockAccessor = { getActorsAt: () => [] } as any;

      expect(isBlocked(world, 5, 5, mockAccessor)).toBe(true);
    });

    it('should return true for actor positions', () => {
      const world = createTestWorld(10, 10, new Array(100).fill(0));
      const mockAccessor = {
        getActorsAt: (x: number, y: number) => {
          if (x === 3 && y === 3) return [{ category: "combatant" }];
          return [];
        }
      } as any;

      expect(isBlocked(world, 3, 3, mockAccessor)).toBe(true);
    });

    it('should return false for empty floor tiles', () => {
      const world = createTestWorld(10, 10, new Array(100).fill(0));
      const mockAccessor = { getActorsAt: () => [] } as any;

      expect(isBlocked(world, 3, 3, mockAccessor)).toBe(false);
      expect(isBlocked(world, 7, 7, mockAccessor)).toBe(false);
    });

    it('should return true for out of bounds', () => {
      const world = createTestWorld(10, 10, new Array(100).fill(0));
      const mockAccessor = { getActorsAt: () => [] } as any;

      expect(isBlocked(world, -1, 0, mockAccessor)).toBe(true);
      expect(isBlocked(world, 10, 10, mockAccessor)).toBe(true);
    });
  });
  describe('tryDestructTile', () => {
    it('should destruct a destructible tile', () => {
      const tiles = new Array(100).fill(TileType.EMPTY);
      tiles[0] = TileType.GRASS;
      const world = createTestWorld(10, 10, tiles);

      const result = tryDestructTile(world, 0, 0);

      expect(result).toBe(true);
      expect(world.tiles[0]).toBe(TileType.GRASS_SAPLINGS);
    });

    it('should not destruct a non-destructible tile', () => {
      const tiles = new Array(100).fill(TileType.EMPTY);
      tiles[0] = TileType.WALL;
      const world = createTestWorld(10, 10, tiles);

      const result = tryDestructTile(world, 0, 0);

      expect(result).toBe(false);
      expect(world.tiles[0]).toBe(TileType.WALL);
    });

    it('should return false for out of bounds', () => {
      const world = createTestWorld(10, 10, new Array(100).fill(TileType.EMPTY));
      expect(tryDestructTile(world, -1, 0)).toBe(false);
    });
  });
});