regress/server/src/config.ts

import { z } from 'zod';

const envSchema = z.object({
  PORT: z.coerce.number().default(8096),
  HOST: z.string().default('0.0.0.0'),
  DATA_DIR: z.string().default('./data'),
  STATIC_DIR: z.string().optional(),
  PUBLIC_URL: z.string().url().default('http://localhost:8096'),
  // Set when this instance is deployed under a path prefix on a shared domain
  // (e.g. "/regress" on podsteadr.atobitcoin.io/regress/) rather than at
  // root. Must match nginx's location block, which must NOT strip the
  // prefix — the NIP-98 `u` tag the frontend signs includes it, so the
  // backend needs to see (and route) the same full path. Leave unset ("") to
  // deploy at root, e.g. its own dedicated host/port.
  ROUTE_PREFIX: z.string().default(''),
  NIP98_MAX_SKEW_SECS: z.coerce.number().default(60),
  SESSION_TTL_DAYS: z.coerce.number().default(30),
  // Default sync area: Madeira, Portugal (Funchal-centered radius covering the whole island).
  BTCMAP_CENTER_LAT: z.coerce.number().default(32.7607),
  BTCMAP_CENTER_LON: z.coerce.number().default(-16.9595),
  BTCMAP_RADIUS_KM: z.coerce.number().default(45),
  // How close (in meters) a player must be to a place to claim it or link from it.
  CLAIM_RADIUS_METERS: z.coerce.number().default(40),
});

export type Config = z.infer<typeof envSchema>;

export function loadConfig(env: NodeJS.ProcessEnv = process.env): Config {
  return envSchema.parse(env);
}