// Settings come from the environment, or from a .env file next to package.json (see .env.example).
// Every setting has a default: OScope runs with no .env at all.
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

export const ROOT = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..');

// .env: KEY=value lines; a value already set in the environment wins
try {
  for (const line of fs.readFileSync(path.join(ROOT, '.env'), 'utf8').split(/\r?\n/)) {
    const m = line.match(/^\s*([A-Z_][A-Z0-9_]*)\s*=\s*(.*?)\s*$/i);
    if (m && process.env[m[1]] == null) process.env[m[1]] = m[2].replace(/^(['"])(.*)\1$/, '$2');
  }
} catch {}

const env = process.env;
const num = (v, d) => (v != null && v !== '' && Number.isFinite(+v) ? +v : d);

export const config = {
  port: num(env.PORT, 3000),
  portFixed: env.PORT != null && env.PORT !== '', // a port you chose is never swapped for a free one
  host: env.HOST || '127.0.0.1',
  // Live pump.fun + PumpSwap trade stream (JSON, one message per transaction). Free, no key, no sign-up.
  feedUrl: env.FEED_URL || 'wss://stream.pumpapi.io/',
  // OScope shares its one stream connection at ws://localhost:<port>/firehose for your own tools. "off" turns it off.
  firehose: (env.FIREHOSE || 'on').toLowerCase() !== 'off',
  dataDir: path.resolve(ROOT, env.DATA_DIR || 'data'),
  // Public IPFS gateways asked for coin pictures and metadata, in this order (comma separated, each ending in /ipfs/).
  ipfsGateways: (env.IPFS_GATEWAYS || 'https://ipfs.filebase.io/ipfs/,https://4everland.io/ipfs/,https://pump.mypinata.cloud/ipfs/').split(',').map(s => s.trim()).filter(s => /^https:\/\/[^\s]+\/ipfs\/$/.test(s)),
  // A curve coin moves from New Pairs to Final Stretch at this bonding-curve progress (percent).
  stretchAt: num(env.STRETCH_AT, 60),
  // New Pairs keeps coins younger than this (minutes).
  newMaxAgeMin: num(env.NEW_MAX_AGE_MIN, 60),
  // Coins kept per Pulse column (the page filters further).
  columnCap: num(env.COLUMN_CAP, 80),
  // Trades kept in memory per coin that is on screen, open or young (the coin page's trade list reads these).
  tradeCap: num(env.TRADE_CAP, 1000),
  // Quiet coins are dropped from memory after this many minutes without a trade.
  idleDropMin: num(env.IDLE_DROP_MIN, 120),
  // Coins kept in memory at most; the ones traded least recently go first.
  maxCoins: num(env.MAX_COINS, 6000),
  // A line in the terminal every N seconds saying how many trades came in (0 = off).
  logEvery: num(env.LOG_EVERY, 15),
};