import test from 'node:test';
import assert from 'node:assert/strict';

import { loadConfig } from '../src/lib/config.mjs';

const ENV_KEYS = [
  'NEAR_RPC_URL',
  'NEAR_INTENTS_PAIR_FILTER',
  'TRADING_BTC_ASSET_ID',
  'TRADING_BTC_TRACKED_ASSET_IDS',
  'TRADING_BTC_LABEL',
  'TRADING_EURE_ASSET_ID',
];

const NBTC = 'nep141:nbtc.bridge.near';
const LEGACY_BTC = 'nep141:btc.omft.near';
const EURE = 'nep141:gnosis-0x420ca0f9b9b604ce0fd9c18ef134c705e5fa3430.omft.near';

function withCleanEnv(fn) {
  const previous = Object.fromEntries(ENV_KEYS.map((key) => [key, process.env[key]]));
  for (const key of ENV_KEYS) delete process.env[key];
  try {
    return fn();
  } finally {
    for (const [key, value] of Object.entries(previous)) {
      if (value == null) delete process.env[key];
      else process.env[key] = value;
    }
  }
}

test('default config trades nBTC while still tracking legacy BTC', () => withCleanEnv(() => {
  const config = loadConfig({ envPath: '/tmp/unrip-no-such-env-file' });

  assert.equal(config.nearRpcUrl, 'https://near.lava.build');
  assert.equal(
    config.nearIntentsPairFilter,
    `${NBTC}->${EURE}`,
  );
  assert.equal(config.tradingBtc.assetId, NBTC);
  assert.deepEqual(config.activeAssetIds, [NBTC, EURE]);
  assert.deepEqual(config.trackedAssetIds, [NBTC, LEGACY_BTC, EURE]);
  assert.equal(config.assetRegistry.get(NBTC).label, 'BTC / nBTC reserve');
  assert.equal(config.assetRegistry.get(LEGACY_BTC).label, 'BTC / legacy OMFT');
  assert.equal(config.assetRegistry.get(LEGACY_BTC).role, 'legacy');
}));

test('tracked BTC ids always include the configured trading BTC reserve', () => withCleanEnv(() => {
  process.env.TRADING_BTC_ASSET_ID = NBTC;
  process.env.TRADING_BTC_TRACKED_ASSET_IDS = LEGACY_BTC;

  const config = loadConfig({ envPath: '/tmp/unrip-no-such-env-file' });

  assert.deepEqual(config.tradingBtcAssets.map((asset) => asset.assetId), [NBTC, LEGACY_BTC]);
  assert.deepEqual(config.activeAssetIds, [NBTC, EURE]);
}));