wren/val Public Public: anyone can read this; nobody can change it.

/**

 * The map: this game's one grid, and what its letters mean.

 *

 * Two sites (A left, B right), a mid corridor between the spawns, and a back

 * corridor along the bottom that links A main, spawn and B main — the flank.

 * Tiles are 80 units; a player is a circle of radius 16, so a one-tile

 * corridor is comfortably wide and a wall is never thin enough for a ray to

 * step over.

 *

 * The mechanics — collision, line of sight, the walk distance a bot uses to

 * path — are `engine/grid.ts`, bound here to these rows. What is this

 * game's own is the rows themselves and the reading of their letters: a

 * plant site, a spawn, where the orbs sit.

 */

import { makeGrid, segmentHitsCircle, segmentPoint, type Point } from "./engine/grid.ts";

export { segmentHitsCircle, segmentPoint, type Point };

export const TILE = 80;

// '#' wall · '.' floor · 'A'/'B' plant site · 'a' attacker spawn · 'd' defender spawn

const ROWS_SRC = [

  "##############################",

  "#........###.dddd.###........#",

  "#.AAAAA..###.dddd.###..BBBBB.#",

  "#.AAAAA..##........##..BBBBB.#",

  "#.AAAAA..##.#....#.##..BBBBB.#",

  "#.AAAAA..##........##..BBBBB.#",

  "#...##......#....#......##...#",

  "#..####....#......#....####..#",

  "#..####..###......###..####..#",

  "#..####..####....####..####..#",

  "#..####..####.##.####..####..#",

  "#........####.##.####........#",

  "#..####..####....####..####..#",

  "#..####..#####..#####..####..#",

  "#..####..#####..#####..####..#",

  "#..####..###......###..####..#",

  "#........##..aaaa..##........#",

  "#............aaaa............#",

  "##############################",

];

const board = makeGrid(ROWS_SRC, TILE);

export const COLS = board.cols;

export const ROWS = board.rows;

export const WIDTH = board.width;

export const HEIGHT = board.height;

export const grid: string[] = ROWS_SRC;

export const gridRows = (): string[] => ROWS_SRC.slice();

export type Site = "A" | "B";

export const solidTile = board.solidTile;

export const tileOf = board.tileOf;

export const centreOf = board.centreOf;

export const solidAt = board.solidAt;

export const moveCircle = board.moveCircle;

export const blockedCircle = board.blockedCircle;

export const wallBetween = board.wallBetween;

export const rayHitWall = board.rayHitWall;

export const walkDistance = board.walkDistance;

export const pathStep = board.pathStep;

export const clearPaths = board.clearPaths;

/** The site a point plants on, or null: the spike only arms inside a site. */

export const siteAt = (x: number, y: number): Site | null => {

  const c = board.cellAt(x, y);

  return c === "A" || c === "B" ? c : null;

};

export const spawnCells = (side: "atk" | "def"): Point[] => board.cellsOf(side === "atk" ? "a" : "d");

export const siteCells = (site: Site): Point[] => board.cellsOf(site);

export const siteCentre = (site: Site): Point => {

  const cells = siteCells(site);

  const sum = cells.reduce((a, p) => ({ x: a.x + p.x, y: a.y + p.y }), { x: 0, y: 0 });

  return { x: sum.x / cells.length, y: sum.y / cells.length };

};

/** Ult orbs: one on each half of mid, free for whoever walks over them. */

export const orbSpots = (): Point[] => [centreOf(4, 11), centreOf(25, 11)];