'use strict';

// Tile dimensions
const TILE = 32;
const COLS = 32;
const ROWS = 24;

// Tile types
const TILE_TYPES = {
  FLOOR: 0,
  WALL: 1,
  SOFTWALL: 2,
  LAVA: 3,
  WATER: 4,
  TORCH: 5,
  DOOR: 6,
  LEVER: 7,
  SWITCH: 8,
  TRAP: 9,
  TARGET: 10,
  CHEST: 11,
  EXIT: 12,
  ROCK: 13,
  ITEM: 14,
};

// Backward-compatible individual constants
const T_FLOOR = TILE_TYPES.FLOOR;
const T_WALL = TILE_TYPES.WALL;
const T_SOFTWALL = TILE_TYPES.SOFTWALL;
const T_LAVA = TILE_TYPES.LAVA;
const T_WATER = TILE_TYPES.WATER;
const T_TORCH = TILE_TYPES.TORCH;
const T_DOOR = TILE_TYPES.DOOR;
const T_LEVER = TILE_TYPES.LEVER;
const T_SWITCH = TILE_TYPES.SWITCH;
const T_TRAP = TILE_TYPES.TRAP;
const T_TARGET = TILE_TYPES.TARGET;
const T_CHEST = TILE_TYPES.CHEST;
const T_EXIT = TILE_TYPES.EXIT;
const T_ROCK = TILE_TYPES.ROCK;
const T_ITEM = TILE_TYPES.ITEM;

// Timing constants
const MOVE_COOLDOWN = 100;
const ATTACK_COOLDOWN = 400;
const ATTACK_ANIM = 250;
const ENEMY_MOVE_INTERVAL = 800;
const ENEMY_ATTACK_INTERVAL = 1500;
const HIT_FLASH = 200;
const MESSAGE_DURATION = 2000;
const TRANSITION_DURATION = 600;

// Direction vectors: [Down, Up, Left, Right]
const DIRS = [
  { x: 0, y: 1 },
  { x: 0, y: -1 },
  { x: -1, y: 0 },
  { x: 1, y: 0 },
];
const DIR_NAMES = ['Down', 'Up', 'Left', 'Right'];

// Opposite direction lookup
const OPPOSITE_DIR = [1, 0, 3, 2];

// Color palette (base stone dungeon theme)
const COLORS = {
  floor: '#C4A265',
  floorDark: '#A8884D',
  wall: '#505050',
  wallTop: '#6E6E6E',
  wallFront: '#5A5A5A',
  wallBottom: '#383838',
  playerBody: '#228B22',
  playerTunic: '#1A6B1A',
  playerHead: '#FFD700',
  playerEyes: '#000080',
  playerHair: '#8B4513',
  rock: '#888888',
  rockDark: '#666666',
  rockLight: '#AAAAAA',
  target: '#FFD700',
  targetGlow: 'rgba(255,215,0,0.3)',
  chestClosed: '#8B4513',
  chestGold: '#DAA520',
  chestOpen: '#A0522D',
  swordBlade: '#C0C0C0',
  swordHandle: '#8B4513',
  swordGem: '#FF0000',
  goblin: '#8B0000',
  goblinLight: '#CC2222',
  goblinEye: '#00FF00',
  goblinTeeth: '#FFFFFF',
  torchStick: '#654321',
  torchFlame: '#FF8C00',
  torchGlow: 'rgba(255,140,0,0.15)',
  door: '#654321',
  doorFrame: '#8B7355',
  doorKnob: '#FFD700',
  heart: '#FF0000',
  heartEmpty: '#444444',
  msgText: '#FFFFFF',
  overlay: 'rgba(0,0,0,0.75)',
  hitFlash: 'rgba(255,0,0,0.3)',
  softwall: '#705040',
  softwallDark: '#503828',
  lava: '#FF4500',
  lavaLight: '#FF6347',
  water: '#4169AA',
  waterLight: '#5F9EA0',
  lever: '#B8860B',
  switchFloor: '#DAA520',
  trap: '#8B008B',
};

// Screen states
const SCREEN_TITLE = 'title';
const SCREEN_DUNGEON_SELECT = 'dungeon_select';
const SCREEN_PLAYING = 'playing';
const SCREEN_DEAD = 'dead';
const SCREEN_DUNGEON_COMPLETE = 'dungeon_complete';
const SCREEN_GAME_COMPLETE = 'game_complete';
const SCREEN_INVENTORY = 'inventory';

// Canvas dimensions
const CANVAS_W = 640;
const CANVAS_H = 480;

// Max values
const MAX_HEARTS = 13; // 26 HP
const MAX_INVENTORY_SLOTS = 12;
const MAX_PARTICLES = 100;

if (typeof module !== 'undefined' && module.exports) {
  module.exports = {
    TILE, COLS, ROWS, TILE_TYPES,
    T_FLOOR, T_WALL, T_SOFTWALL, T_LAVA, T_WATER, T_TORCH,
    T_DOOR, T_LEVER, T_SWITCH, T_TRAP, T_TARGET, T_CHEST,
    T_EXIT, T_ROCK, T_ITEM,
    MOVE_COOLDOWN, ATTACK_COOLDOWN, ATTACK_ANIM,
    ENEMY_MOVE_INTERVAL, ENEMY_ATTACK_INTERVAL,
    HIT_FLASH, MESSAGE_DURATION, TRANSITION_DURATION,
    DIRS, DIR_NAMES, OPPOSITE_DIR,
    COLORS,
    SCREEN_TITLE, SCREEN_DUNGEON_SELECT, SCREEN_PLAYING,
    SCREEN_DEAD, SCREEN_DUNGEON_COMPLETE, SCREEN_GAME_COMPLETE,
    SCREEN_INVENTORY,
    CANVAS_W, CANVAS_H,
    MAX_HEARTS, MAX_INVENTORY_SLOTS, MAX_PARTICLES,
  };
}